20th Street, Boulder, Colorado, United States Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
20th Street, Boulder, Colorado, United States
2025
2026
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2025
70AQILowest AQI recorded on
19th Aug 2025
22AQISame Day Analysis (15th August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 28 of Good air quality, showing improvement over 2025 on the same day.
Day & Night AQI Trend: 15th Aug - 16th Aug 2026
20th Street, Boulder, Colorado, United States
AQI
Day
Night
.
6 AM15th Aug 2026
8 PM
5 AM16th Aug 2026
Day time
Avg. Highest Time
8AM15th Aug
38AQI
Avg. Lowest Time
3PM15th Aug
12AQI
Night time
Avg. Highest Time
12AM16th Aug
42AQI
Avg. Lowest Time
1AM16th Aug
10AQI
In the last 24 hours,
20th Street's AQI reached its highest point of 42 at 12 AM during the Night, while the lowest point, 10, was recorded at 1 AM during the Night between 15th Aug and 16th Aug 2026.
Day & Night AQI Trend : Jul - Aug 2026
20th Street, Boulder, Colorado, United States
JulAug
18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th
Day
Night
18th Jul 2026296 AMAQI
18th Jul 2026297 AMAQI
18th Jul 2026298 AMAQI
18th Jul 2026299 AMAQI
18th Jul 20262910 AMAQI
18th Jul 20263311 AMAQI
18th Jul 20263312 PMAQI
18th Jul 2026291 PMAQI
18th Jul 2026422 PMAQI
18th Jul 2026423 PMAQI
18th Jul 2026424 PMAQI
18th Jul 2026405 PMAQI
18th Jul 2026406 PMAQI
18th Jul 2026387 PMAQI
18th Jul 2026338 PMAQI
18th Jul 2026339 PMAQI
18th Jul 20263610 PMAQI
18th Jul 20262511 PMAQI
19th Jul 20262912 AMAQI
19th Jul 2026311 AMAQI
19th Jul 2026292 AMAQI
19th Jul 2026293 AMAQI
19th Jul 2026334 AMAQI
19th Jul 2026325 AMAQI
25°C15/33°C
19th Jul 2026296 AMAQI
19th Jul 2026257 AMAQI
19th Jul 2026318 AMAQI
19th Jul 2026259 AMAQI
19th Jul 20262710 AMAQI
19th Jul 20263611 AMAQI
19th Jul 20263112 PMAQI
19th Jul 2026291 PMAQI
19th Jul 2026232 PMAQI
19th Jul 2026293 PMAQI
19th Jul 2026254 PMAQI
19th Jul 2026285 PMAQI
19th Jul 2026236 PMAQI
19th Jul 2026197 PMAQI
19th Jul 2026298 PMAQI
19th Jul 2026299 PMAQI
19th Jul 20262510 PMAQI
19th Jul 20262511 PMAQI
20th Jul 20262912 AMAQI
20th Jul 2026291 AMAQI
20th Jul 2026272 AMAQI
20th Jul 2026293 AMAQI
20th Jul 2026294 AMAQI
20th Jul 2026275 AMAQI
25°C15/35°C
20th Jul 2026256 AMAQI
20th Jul 2026277 AMAQI
20th Jul 2026278 AMAQI
20th Jul 2026319 AMAQI
20th Jul 20262710 AMAQI
20th Jul 20262911 AMAQI
20th Jul 20263812 PMAQI
20th Jul 2026441 PMAQI
20th Jul 2026462 PMAQI
20th Jul 2026423 PMAQI
20th Jul 2026424 PMAQI
20th Jul 2026335 PMAQI
20th Jul 2026326 PMAQI
20th Jul 2026387 PMAQI
20th Jul 2026448 PMAQI
20th Jul 20264010 PMAQI
20th Jul 20264211 PMAQI
21st Jul 20264612 AMAQI
21st Jul 2026421 AMAQI
21st Jul 2026382 AMAQI
21st Jul 2026403 AMAQI
21st Jul 2026334 AMAQI
21st Jul 2026335 AMAQI
26°C18/37°C
21st Jul 2026316 AMAQI
21st Jul 2026297 AMAQI
21st Jul 2026408 AMAQI
21st Jul 2026409 AMAQI
21st Jul 20264610 AMAQI
21st Jul 20264611 AMAQI
21st Jul 20264612 PMAQI
21st Jul 2026361 PMAQI
21st Jul 2026402 PMAQI
21st Jul 2026333 PMAQI
21st Jul 2026384 PMAQI
21st Jul 2026315 PMAQI
21st Jul 2026296 PMAQI
21st Jul 2026297 PMAQI
21st Jul 2026268 PMAQI
21st Jul 2026299 PMAQI
21st Jul 20263310 PMAQI
21st Jul 20262511 PMAQI
22nd Jul 20263312 AMAQI
22nd Jul 2026311 AMAQI
22nd Jul 2026252 AMAQI
22nd Jul 2026313 AMAQI
22nd Jul 2026294 AMAQI
22nd Jul 2026295 AMAQI
26°C19/35°C
22nd Jul 2026296 AMAQI
22nd Jul 2026297 AMAQI
22nd Jul 2026318 AMAQI
22nd Jul 2026339 AMAQI
22nd Jul 20263410 AMAQI
22nd Jul 20262911 AMAQI
22nd Jul 20262912 PMAQI
22nd Jul 2026271 PMAQI
22nd Jul 2026252 PMAQI
22nd Jul 2026293 PMAQI
22nd Jul 2026234 PMAQI
22nd Jul 2026225 PMAQI
22nd Jul 2026256 PMAQI
22nd Jul 2026247 PMAQI
22nd Jul 2026258 PMAQI
22nd Jul 2026259 PMAQI
22nd Jul 20263010 PMAQI
22nd Jul 20263811 PMAQI
23rd Jul 20262512 AMAQI
23rd Jul 2026341 AMAQI
23rd Jul 2026302 AMAQI
23rd Jul 2026343 AMAQI
23rd Jul 2026384 AMAQI
23rd Jul 2026335 AMAQI
22°C16/32°C
23rd Jul 2026336 AMAQI
23rd Jul 2026297 AMAQI
23rd Jul 2026318 AMAQI
23rd Jul 2026319 AMAQI
23rd Jul 20263110 AMAQI
23rd Jul 20263311 AMAQI
23rd Jul 20263312 PMAQI
23rd Jul 2026361 PMAQI
23rd Jul 2026332 PMAQI
23rd Jul 2026273 PMAQI
23rd Jul 2026254 PMAQI
23rd Jul 2026275 PMAQI
23rd Jul 2026176 PMAQI
23rd Jul 2026197 PMAQI
23rd Jul 2026258 PMAQI
23rd Jul 2026339 PMAQI
23rd Jul 20263110 PMAQI
23rd Jul 20263811 PMAQI
24th Jul 20263612 AMAQI
24th Jul 2026251 AMAQI
24th Jul 2026332 AMAQI
24th Jul 2026333 AMAQI
24th Jul 2026294 AMAQI
24th Jul 2026335 AMAQI
22°C16/29°C
24th Jul 2026336 AMAQI
24th Jul 2026337 AMAQI
24th Jul 2026298 AMAQI
24th Jul 2026299 AMAQI
24th Jul 20263110 AMAQI
24th Jul 20262911 AMAQI
24th Jul 20263312 PMAQI
24th Jul 2026311 PMAQI
24th Jul 2026272 PMAQI
24th Jul 2026333 PMAQI
24th Jul 2026314 PMAQI
24th Jul 2026335 PMAQI
24th Jul 2026296 PMAQI
24th Jul 2026297 PMAQI
24th Jul 2026388 PMAQI
24th Jul 2026299 PMAQI
24th Jul 20263110 PMAQI
24th Jul 20263111 PMAQI
25th Jul 20262712 AMAQI
25th Jul 2026311 AMAQI
25th Jul 2026332 AMAQI
25th Jul 2026333 AMAQI
25th Jul 2026254 AMAQI
25th Jul 2026295 AMAQI
25°C16/34°C
25th Jul 2026296 AMAQI
25th Jul 2026257 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262910 AMAQI
25th Jul 20264211 AMAQI
25th Jul 20263812 PMAQI
25th Jul 2026301 PMAQI
25th Jul 2026252 PMAQI
25th Jul 2026173 PMAQI
25th Jul 2026254 PMAQI
25th Jul 2026275 PMAQI
25th Jul 2026276 PMAQI
25th Jul 2026257 PMAQI
25th Jul 2026298 PMAQI
25th Jul 2026259 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262512 AMAQI
26th Jul 2026111 AMAQI
26th Jul 2026182 AMAQI
26th Jul 2026253 AMAQI
26th Jul 2026294 AMAQI
26th Jul 2026235 AMAQI
26°C18/36°C
26th Jul 2026296 AMAQI
26th Jul 2026297 AMAQI
26th Jul 2026298 AMAQI
26th Jul 2026299 AMAQI
26th Jul 20262910 AMAQI
26th Jul 20263111 AMAQI
26th Jul 20263112 PMAQI
26th Jul 2026291 PMAQI
26th Jul 2026252 PMAQI
26th Jul 2026213 PMAQI
26th Jul 2026124 PMAQI
26th Jul 2026295 PMAQI
26th Jul 2026196 PMAQI
26th Jul 2026347 PMAQI
26th Jul 2026298 PMAQI
26th Jul 2026299 PMAQI
26th Jul 20262910 PMAQI
26th Jul 20262911 PMAQI
27th Jul 20262912 AMAQI
27th Jul 2026291 AMAQI
27th Jul 2026272 AMAQI
27th Jul 2026123 AMAQI
27th Jul 2026164 AMAQI
27th Jul 2026145 AMAQI
27°C21/36°C
27th Jul 2026186 AMAQI
27th Jul 2026247 AMAQI
27th Jul 2026328 AMAQI
27th Jul 2026259 AMAQI
27th Jul 20262910 AMAQI
27th Jul 20262911 AMAQI
27th Jul 20263412 PMAQI
27th Jul 2026251 PMAQI
27th Jul 2026302 PMAQI
27th Jul 2026283 PMAQI
27th Jul 2026264 PMAQI
27th Jul 2026275 PMAQI
27th Jul 2026366 PMAQI
27th Jul 2026177 PMAQI
27th Jul 2026308 PMAQI
27th Jul 2026299 PMAQI
27th Jul 20262910 PMAQI
27th Jul 20262311 PMAQI
28th Jul 20263312 AMAQI
28th Jul 2026421 AMAQI
28th Jul 2026332 AMAQI
28th Jul 2026293 AMAQI
28th Jul 2026384 AMAQI
28th Jul 2026295 AMAQI
24°C19/32°C
28th Jul 2026346 AMAQI
28th Jul 2026307 AMAQI
28th Jul 2026428 AMAQI
28th Jul 2026259 AMAQI
28th Jul 20264210 AMAQI
28th Jul 20263111 AMAQI
28th Jul 20263412 PMAQI
28th Jul 2026441 PMAQI
28th Jul 2026422 PMAQI
28th Jul 2026283 PMAQI
28th Jul 2026314 PMAQI
28th Jul 2026315 PMAQI
28th Jul 2026426 PMAQI
28th Jul 2026257 PMAQI
28th Jul 2026298 PMAQI
28th Jul 2026299 PMAQI
28th Jul 20262910 PMAQI
28th Jul 20262911 PMAQI
29th Jul 20262912 AMAQI
29th Jul 2026311 AMAQI
29th Jul 2026312 AMAQI
29th Jul 2026423 AMAQI
29th Jul 2026424 AMAQI
29th Jul 2026545 AMAQI
22°C16/32°C
29th Jul 2026606 AMAQI
29th Jul 2026297 AMAQI
29th Jul 2026368 AMAQI
29th Jul 2026409 AMAQI
29th Jul 20263810 AMAQI
29th Jul 20262811 AMAQI
29th Jul 20262712 PMAQI
29th Jul 2026331 PMAQI
29th Jul 2026312 PMAQI
29th Jul 2026273 PMAQI
29th Jul 2026314 PMAQI
29th Jul 2026195 PMAQI
29th Jul 2026306 PMAQI
29th Jul 2026367 PMAQI
29th Jul 2026298 PMAQI
29th Jul 2026239 PMAQI
29th Jul 20262910 PMAQI
29th Jul 20265611 PMAQI
30th Jul 20264612 AMAQI
30th Jul 2026291 AMAQI
30th Jul 2026462 AMAQI
30th Jul 2026393 AMAQI
30th Jul 2026274 AMAQI
30th Jul 2026255 AMAQI
21°C16/31°C
30th Jul 2026216 AMAQI
30th Jul 2026257 AMAQI
30th Jul 2026278 AMAQI
30th Jul 2026279 AMAQI
30th Jul 20264410 AMAQI
30th Jul 20262311 AMAQI
30th Jul 20262512 PMAQI
30th Jul 2026251 PMAQI
30th Jul 2026242 PMAQI
30th Jul 2026263 PMAQI
30th Jul 2026294 PMAQI
30th Jul 2026295 PMAQI
30th Jul 2026296 PMAQI
30th Jul 2026297 PMAQI
30th Jul 2026298 PMAQI
30th Jul 2026299 PMAQI
30th Jul 20262910 PMAQI
30th Jul 20262911 PMAQI
31st Jul 20262912 AMAQI
31st Jul 2026251 AMAQI
31st Jul 2026252 AMAQI
31st Jul 2026233 AMAQI
31st Jul 2026294 AMAQI
31st Jul 2026295 AMAQI
24°C16/33°C
31st Jul 2026276 AMAQI
31st Jul 2026277 AMAQI
31st Jul 2026298 AMAQI
31st Jul 2026339 AMAQI
31st Jul 20262910 AMAQI
31st Jul 20262511 AMAQI
31st Jul 20262712 PMAQI
31st Jul 2026291 PMAQI
31st Jul 2026292 PMAQI
31st Jul 2026293 PMAQI
31st Jul 2026294 PMAQI
31st Jul 2026295 PMAQI
31st Jul 2026296 PMAQI
31st Jul 2026277 PMAQI
31st Jul 2026298 PMAQI
31st Jul 2026299 PMAQI
31st Jul 20263110 PMAQI
31st Jul 20263111 PMAQI
1st Aug 20262912 AMAQI
1st Aug 2026291 AMAQI
1st Aug 2026312 AMAQI
1st Aug 2026293 AMAQI
1st Aug 2026334 AMAQI
1st Aug 2026335 AMAQI
21°C15/32°C
1st Aug 2026316 AMAQI
1st Aug 2026317 AMAQI
1st Aug 2026298 AMAQI
1st Aug 2026299 AMAQI
1st Aug 20263310 AMAQI
1st Aug 20262911 AMAQI
1st Aug 20263112 PMAQI
1st Aug 2026331 PMAQI
1st Aug 2026332 PMAQI
1st Aug 2026333 PMAQI
1st Aug 2026294 PMAQI
1st Aug 2026235 PMAQI
1st Aug 2026296 PMAQI
1st Aug 2026257 PMAQI
1st Aug 2026258 PMAQI
1st Aug 2026299 PMAQI
1st Aug 20262510 PMAQI
1st Aug 20262111 PMAQI
2nd Aug 20262312 AMAQI
2nd Aug 2026211 AMAQI
2nd Aug 2026272 AMAQI
2nd Aug 2026293 AMAQI
2nd Aug 2026274 AMAQI
2nd Aug 2026275 AMAQI
23°C14/33°C
2nd Aug 2026296 AMAQI
2nd Aug 2026277 AMAQI
2nd Aug 2026278 AMAQI
2nd Aug 2026259 AMAQI
2nd Aug 20262910 AMAQI
2nd Aug 20262511 AMAQI
2nd Aug 20262712 PMAQI
2nd Aug 2026291 PMAQI
2nd Aug 2026292 PMAQI
2nd Aug 2026253 PMAQI
2nd Aug 2026234 PMAQI
2nd Aug 2026365 PMAQI
2nd Aug 2026296 PMAQI
2nd Aug 2026427 PMAQI
2nd Aug 2026408 PMAQI
2nd Aug 2026339 PMAQI
2nd Aug 20262910 PMAQI
2nd Aug 20262511 PMAQI
3rd Aug 20264612 AMAQI
3rd Aug 2026531 AMAQI
3rd Aug 2026572 AMAQI
3rd Aug 2026603 AMAQI
3rd Aug 2026654 AMAQI
3rd Aug 2026665 AMAQI
27°C17/38°C
3rd Aug 2026656 AMAQI
3rd Aug 2026627 AMAQI
3rd Aug 2026598 AMAQI
3rd Aug 2026569 AMAQI
3rd Aug 20265910 AMAQI
3rd Aug 20265511 AMAQI
3rd Aug 20265212 PMAQI
3rd Aug 2026521 PMAQI
3rd Aug 2026482 PMAQI
3rd Aug 2026503 PMAQI
3rd Aug 2026484 PMAQI
3rd Aug 2026535 PMAQI
3rd Aug 2026526 PMAQI
3rd Aug 2026607 PMAQI
3rd Aug 2026668 PMAQI
3rd Aug 2026729 PMAQI
3rd Aug 20267210 PMAQI
3rd Aug 20268211 PMAQI
4th Aug 20267612 AMAQI
4th Aug 2026681 AMAQI
4th Aug 2026662 AMAQI
4th Aug 2026623 AMAQI
4th Aug 2026604 AMAQI
4th Aug 2026665 AMAQI
26°C18/37°C
4th Aug 2026666 AMAQI
4th Aug 2026627 AMAQI
4th Aug 2026578 AMAQI
4th Aug 2026579 AMAQI
4th Aug 20265510 AMAQI
4th Aug 20265411 AMAQI
4th Aug 20265312 PMAQI
4th Aug 2026541 PMAQI
4th Aug 2026562 PMAQI
4th Aug 2026583 PMAQI
4th Aug 2026594 PMAQI
4th Aug 2026625 PMAQI
4th Aug 2026606 PMAQI
4th Aug 2026597 PMAQI
4th Aug 2026628 PMAQI
4th Aug 2026649 PMAQI
4th Aug 20266010 PMAQI
4th Aug 20265911 PMAQI
5th Aug 20265412 AMAQI
5th Aug 2026551 AMAQI
5th Aug 2026532 AMAQI
5th Aug 2026563 AMAQI
5th Aug 2026534 AMAQI
5th Aug 2026535 AMAQI
17°C12/24°C
5th Aug 2026526 AMAQI
5th Aug 2026527 AMAQI
5th Aug 2026498 AMAQI
5th Aug 2026529 AMAQI
5th Aug 20265210 AMAQI
5th Aug 20265211 AMAQI
5th Aug 20265212 PMAQI
5th Aug 2026541 PMAQI
5th Aug 2026542 PMAQI
5th Aug 2026523 PMAQI
5th Aug 2026534 PMAQI
5th Aug 2026525 PMAQI
5th Aug 2026546 PMAQI
5th Aug 2026527 PMAQI
5th Aug 2026528 PMAQI
5th Aug 2026519 PMAQI
5th Aug 20265210 PMAQI
5th Aug 20265111 PMAQI
6th Aug 20265112 AMAQI
6th Aug 2026511 AMAQI
6th Aug 2026512 AMAQI
6th Aug 2026523 AMAQI
6th Aug 2026464 AMAQI
6th Aug 2026485 AMAQI
19°C8/29°C
6th Aug 2026496 AMAQI
6th Aug 2026467 AMAQI
6th Aug 2026448 AMAQI
6th Aug 2026489 AMAQI
6th Aug 20264610 AMAQI
6th Aug 20264811 AMAQI
6th Aug 20264812 PMAQI
6th Aug 2026521 PMAQI
6th Aug 2026522 PMAQI
6th Aug 2026503 PMAQI
6th Aug 2026524 PMAQI
6th Aug 2026525 PMAQI
6th Aug 2026526 PMAQI
6th Aug 2026487 PMAQI
6th Aug 2026468 PMAQI
6th Aug 2026509 PMAQI
6th Aug 20265210 PMAQI
6th Aug 20265111 PMAQI
7th Aug 20264912 AMAQI
7th Aug 2026481 AMAQI
7th Aug 2026492 AMAQI
7th Aug 2026513 AMAQI
7th Aug 2026464 AMAQI
7th Aug 2026495 AMAQI
24°C13/35°C
7th Aug 2026486 AMAQI
7th Aug 2026477 AMAQI
7th Aug 2026488 AMAQI
7th Aug 2026519 AMAQI
7th Aug 20265210 AMAQI
7th Aug 20265411 AMAQI
7th Aug 20265612 PMAQI
7th Aug 2026551 PMAQI
7th Aug 2026572 PMAQI
7th Aug 2026573 PMAQI
7th Aug 2026554 PMAQI
7th Aug 2026535 PMAQI
7th Aug 2026546 PMAQI
7th Aug 2026587 PMAQI
7th Aug 2026558 PMAQI
7th Aug 2026549 PMAQI
7th Aug 20265610 PMAQI
7th Aug 20265411 PMAQI
8th Aug 20265512 AMAQI
8th Aug 2026571 AMAQI
8th Aug 2026552 AMAQI
8th Aug 2026563 AMAQI
8th Aug 2026554 AMAQI
8th Aug 2026535 AMAQI
25°C16/34°C
8th Aug 2026546 AMAQI
8th Aug 2026537 AMAQI
8th Aug 2026518 AMAQI
8th Aug 2026529 AMAQI
8th Aug 20265210 AMAQI
8th Aug 20264811 AMAQI
8th Aug 20264812 PMAQI
8th Aug 2026461 PMAQI
8th Aug 2026442 PMAQI
8th Aug 2026483 PMAQI
8th Aug 2026464 PMAQI
8th Aug 2026465 PMAQI
8th Aug 2026466 PMAQI
8th Aug 2026427 PMAQI
8th Aug 2026408 PMAQI
8th Aug 2026369 PMAQI
8th Aug 20263610 PMAQI
8th Aug 20263311 PMAQI
9th Aug 20263312 AMAQI
9th Aug 2026311 AMAQI
9th Aug 2026332 AMAQI
9th Aug 2026313 AMAQI
9th Aug 2026334 AMAQI
9th Aug 2026315 AMAQI
27°C17/37°C
9th Aug 2026336 AMAQI
9th Aug 2026317 AMAQI
9th Aug 2026298 AMAQI
9th Aug 2026299 AMAQI
9th Aug 20262910 AMAQI
9th Aug 20262911 AMAQI
9th Aug 20263112 PMAQI
9th Aug 2026291 PMAQI
9th Aug 2026312 PMAQI
9th Aug 2026293 PMAQI
9th Aug 2026314 PMAQI
9th Aug 2026315 PMAQI
9th Aug 2026316 PMAQI
9th Aug 2026337 PMAQI
9th Aug 2026338 PMAQI
9th Aug 2026339 PMAQI
9th Aug 20263110 PMAQI
9th Aug 20263311 PMAQI
10th Aug 20263612 AMAQI
10th Aug 2026361 AMAQI
10th Aug 2026382 AMAQI
10th Aug 2026383 AMAQI
10th Aug 2026384 AMAQI
10th Aug 2026385 AMAQI
26°C18/35°C
10th Aug 2026386 AMAQI
10th Aug 2026367 AMAQI
10th Aug 2026388 AMAQI
10th Aug 2026409 AMAQI
10th Aug 20264210 AMAQI
10th Aug 20264211 AMAQI
10th Aug 20264312 PMAQI
10th Aug 2026471 PMAQI
10th Aug 2026422 PMAQI
10th Aug 2026403 PMAQI
10th Aug 2026424 PMAQI
10th Aug 2026365 PMAQI
10th Aug 2026336 PMAQI
10th Aug 2026337 PMAQI
10th Aug 2026338 PMAQI
10th Aug 2026339 PMAQI
10th Aug 20263310 PMAQI
10th Aug 20263311 PMAQI
11th Aug 20263312 AMAQI
11th Aug 2026311 AMAQI
11th Aug 2026292 AMAQI
11th Aug 2026313 AMAQI
11th Aug 2026294 AMAQI
11th Aug 2026295 AMAQI
24°C17/33°C
11th Aug 2026296 AMAQI
11th Aug 2026337 AMAQI
11th Aug 2026298 AMAQI
11th Aug 2026319 AMAQI
11th Aug 20263010 AMAQI
11th Aug 20262911 AMAQI
11th Aug 20262912 PMAQI
11th Aug 2026311 PMAQI
11th Aug 2026312 PMAQI
11th Aug 2026333 PMAQI
11th Aug 2026314 PMAQI
11th Aug 2026315 PMAQI
11th Aug 2026336 PMAQI
11th Aug 2026297 PMAQI
11th Aug 2026278 PMAQI
11th Aug 2026239 PMAQI
11th Aug 20262510 PMAQI
11th Aug 20262311 PMAQI
12th Aug 20262912 AMAQI
12th Aug 2026271 AMAQI
12th Aug 2026272 AMAQI
12th Aug 2026253 AMAQI
12th Aug 2026254 AMAQI
12th Aug 2026235 AMAQI
25°C17/34°C
12th Aug 2026256 AMAQI
12th Aug 2026237 AMAQI
12th Aug 2026298 AMAQI
12th Aug 2026339 AMAQI
12th Aug 20263310 AMAQI
12th Aug 20262911 AMAQI
12th Aug 20262912 PMAQI
12th Aug 2026291 PMAQI
12th Aug 2026292 PMAQI
12th Aug 2026323 PMAQI
12th Aug 2026334 PMAQI
12th Aug 2026275 PMAQI
12th Aug 2026296 PMAQI
12th Aug 2026277 PMAQI
12th Aug 2026278 PMAQI
12th Aug 2026259 PMAQI
12th Aug 20262710 PMAQI
12th Aug 20262511 PMAQI
13th Aug 20263312 AMAQI
13th Aug 2026331 AMAQI
13th Aug 2026312 AMAQI
13th Aug 2026303 AMAQI
13th Aug 2026294 AMAQI
13th Aug 2026315 AMAQI
22°C15/32°C
13th Aug 2026316 AMAQI
13th Aug 2026317 AMAQI
13th Aug 2026318 AMAQI
13th Aug 2026369 AMAQI
13th Aug 20263310 AMAQI
13th Aug 20262511 AMAQI
13th Aug 20262512 PMAQI
13th Aug 2026331 PMAQI
13th Aug 2026312 PMAQI
13th Aug 2026313 PMAQI
13th Aug 2026294 PMAQI
13th Aug 2026295 PMAQI
13th Aug 2026296 PMAQI
13th Aug 2026297 PMAQI
13th Aug 2026278 PMAQI
13th Aug 2026279 PMAQI
13th Aug 20262510 PMAQI
13th Aug 20263111 PMAQI
14th Aug 20262912 AMAQI
14th Aug 2026291 AMAQI
14th Aug 2026292 AMAQI
14th Aug 2026343 AMAQI
14th Aug 2026334 AMAQI
14th Aug 2026295 AMAQI
18°C13/25°C
14th Aug 2026236 AMAQI
14th Aug 2026277 AMAQI
14th Aug 2026298 AMAQI
14th Aug 2026299 AMAQI
14th Aug 20262710 AMAQI
14th Aug 20262911 AMAQI
14th Aug 20263312 PMAQI
14th Aug 2026291 PMAQI
14th Aug 2026362 PMAQI
14th Aug 2026313 PMAQI
14th Aug 2026184 PMAQI
14th Aug 2026185 PMAQI
14th Aug 2026136 PMAQI
14th Aug 202697 PMAQI
14th Aug 2026298 PMAQI
14th Aug 2026469 PMAQI
14th Aug 20263410 PMAQI
14th Aug 20262511 PMAQI
15th Aug 20262512 AMAQI
15th Aug 2026291 AMAQI
15th Aug 2026332 AMAQI
15th Aug 2026383 AMAQI
15th Aug 2026324 AMAQI
15th Aug 2026255 AMAQI
19°C12/28°C
15th Aug 2026256 AMAQI
15th Aug 2026297 AMAQI
15th Aug 2026388 AMAQI
15th Aug 2026329 AMAQI
15th Aug 20263810 AMAQI
15th Aug 20262511 AMAQI
15th Aug 20262512 PMAQI
15th Aug 2026291 PMAQI
15th Aug 2026292 PMAQI
15th Aug 2026123 PMAQI
15th Aug 2026254 PMAQI
15th Aug 2026345 PMAQI
15th Aug 2026206 PMAQI
15th Aug 2026297 PMAQI
15th Aug 2026278 PMAQI
15th Aug 2026189 PMAQI
15th Aug 20262910 PMAQI
15th Aug 20262511 PMAQI
16th Aug 20264212 AMAQI
16th Aug 2026101 AMAQI
16th Aug 2026142 AMAQI
16th Aug 2026123 AMAQI
16th Aug 2026214 AMAQI
16th Aug 2026335 AMAQI
20°C14/28°C
16th Aug 2026276 AMAQI
6 AM16th Aug 2026277 AMAQI
16th Aug 2026298 AMAQI
16th Aug 2026389 AMAQI
16th Aug 20263610 AMAQI
16th Aug 20263311 AMAQI
16th Aug 20263112 PMAQI
16th Aug 2026311 PMAQI
1 PM16th Aug 2026252 PMAQI
16th Aug 2026343 PMAQI
16th Aug 2026104 PMAQI
16th Aug 2026105 PMAQI
16th Aug 2026116 PMAQI
16th Aug 2026107 PMAQI
16th Aug 2026108 PMAQI
8 PM16th Aug 2026109 PMAQI
16th Aug 20261010 PMAQI
16th Aug 20261011 PMAQI
1 AM
5 AM
16°C11/29°C
Day time
Avg. Highest Time
10 AM
37AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
7 PM
32AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 10 AM (Avg. 37), while the lowest AQI was between 7 PM to 7 PM (Avg. 32).
Night time
Avg. Highest Time
12 AM
36AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
1 AM - 11 PM
35AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 12 AM (Avg. 36), while the lowest AQI was between 1 AM to 11 PM (Avg. 35).
2026 Days Vs Air Quality
20th Street, Boulder, Colorado, United States
2026
98%
220
2%
4
Total number of days with different AQI categories in last 228 days in 2026 (137 days remaining)
Good
220 DaysModerate
4 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 98%
Health Risk Level:
Very Low
In 2026, 98% of 228 days were within WHO’s safe air quality limits. The risk of health issues is Very Low, but health impacts are still unclear.
Annual Air Quality Insights
20th Street, Boulder, Colorado, United States
AQI levels in 2026
AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
21AQI (US)
21AQI (US)
2nd January 2026
25AQI (US)
25AQI (US)
3rd January 2026
27AQI (US)
27AQI (US)
4th January 2026
19AQI (US)
19AQI (US)
5th January 2026
23AQI (US)
23AQI (US)
6th January 2026
16AQI (US)
16AQI (US)
7th January 2026
17AQI (US)
17AQI (US)
8th January 2026
18AQI (US)
18AQI (US)
9th January 2026
18AQI (US)
18AQI (US)
10th January 2026
15AQI (US)
15AQI (US)
11th January 2026
15AQI (US)
15AQI (US)
12th January 2026
29AQI (US)
29AQI (US)
13th January 2026
22AQI (US)
22AQI (US)
14th January 2026
13AQI (US)
13AQI (US)
15th January 2026
21AQI (US)
21AQI (US)
16th January 2026
22AQI (US)
22AQI (US)
17th January 2026
12AQI (US)
12AQI (US)
18th January 2026
14AQI (US)
14AQI (US)
19th January 2026
21AQI (US)
21AQI (US)
20th January 2026
38AQI (US)
38AQI (US)
21st January 2026
20AQI (US)
20AQI (US)
22nd January 2026
24AQI (US)
24AQI (US)
23rd January 2026
22AQI (US)
22AQI (US)
24th January 2026
30AQI (US)
30AQI (US)
25th January 2026
20AQI (US)
20AQI (US)
26th January 2026
27AQI (US)
27AQI (US)
27th January 2026
23AQI (US)
23AQI (US)
28th January 2026
29AQI (US)
29AQI (US)
29th January 2026
31AQI (US)
31AQI (US)
30th January 2026
33AQI (US)
33AQI (US)
31st January 2026
23AQI (US)
23AQI (US)
1st February 2026
21AQI (US)
21AQI (US)
2nd February 2026
24AQI (US)
24AQI (US)
3rd February 2026
21AQI (US)
21AQI (US)
4th February 2026
28AQI (US)
28AQI (US)
5th February 2026
22AQI (US)
22AQI (US)
6th February 2026
20AQI (US)
20AQI (US)
7th February 2026
21AQI (US)
21AQI (US)
8th February 2026
27AQI (US)
27AQI (US)
9th February 2026
26AQI (US)
26AQI (US)
10th February 2026
23AQI (US)
23AQI (US)
11th February 2026
23AQI (US)
23AQI (US)
12th February 2026
25AQI (US)
25AQI (US)
13th February 2026
20AQI (US)
20AQI (US)
14th February 2026
27AQI (US)
27AQI (US)
15th February 2026
21AQI (US)
21AQI (US)
16th February 2026
20AQI (US)
20AQI (US)
17th February 2026
28AQI (US)
28AQI (US)
18th February 2026
19AQI (US)
19AQI (US)
19th February 2026
23AQI (US)
23AQI (US)
20th February 2026
18AQI (US)
18AQI (US)
21st February 2026
17AQI (US)
17AQI (US)
22nd February 2026
18AQI (US)
18AQI (US)
23rd February 2026
22AQI (US)
22AQI (US)
24th February 2026
29AQI (US)
29AQI (US)
25th February 2026
26AQI (US)
26AQI (US)
26th February 2026
18AQI (US)
18AQI (US)
27th February 2026
20AQI (US)
20AQI (US)
28th February 2026
18AQI (US)
18AQI (US)
1st March 2026
21AQI (US)
21AQI (US)
2nd March 2026
30AQI (US)
30AQI (US)
3rd March 2026
16AQI (US)
16AQI (US)
4th March 2026
19AQI (US)
19AQI (US)
5th March 2026
18AQI (US)
18AQI (US)
6th March 2026
29AQI (US)
29AQI (US)
7th March 2026
26AQI (US)
26AQI (US)
8th March 2026
27AQI (US)
27AQI (US)
9th March 2026
23AQI (US)
23AQI (US)
10th March 2026
20AQI (US)
20AQI (US)
11th March 2026
19AQI (US)
19AQI (US)
12th March 2026
28AQI (US)
28AQI (US)
13th March 2026
20AQI (US)
20AQI (US)
14th March 2026
31AQI (US)
31AQI (US)
15th March 2026
19AQI (US)
19AQI (US)
16th March 2026
22AQI (US)
22AQI (US)
17th March 2026
19AQI (US)
19AQI (US)
18th March 2026
22AQI (US)
22AQI (US)
19th March 2026
17AQI (US)
17AQI (US)
20th March 2026
21AQI (US)
21AQI (US)
21st March 2026
17AQI (US)
17AQI (US)
22nd March 2026
24AQI (US)
24AQI (US)
23rd March 2026
21AQI (US)
21AQI (US)
24th March 2026
21AQI (US)
21AQI (US)
25th March 2026
18AQI (US)
18AQI (US)
26th March 2026
34AQI (US)
34AQI (US)
27th March 2026
26AQI (US)
26AQI (US)
28th March 2026
20AQI (US)
20AQI (US)
29th March 2026
20AQI (US)
20AQI (US)
30th March 2026
21AQI (US)
21AQI (US)
31st March 2026
28AQI (US)
28AQI (US)
1st April 2026
28AQI (US)
28AQI (US)
2nd April 2026
19AQI (US)
19AQI (US)
3rd April 2026
25AQI (US)
25AQI (US)
4th April 2026
16AQI (US)
16AQI (US)
5th April 2026
20AQI (US)
20AQI (US)
6th April 2026
22AQI (US)
22AQI (US)
7th April 2026
29AQI (US)
29AQI (US)
8th April 2026
29AQI (US)
29AQI (US)
9th April 2026
24AQI (US)
24AQI (US)
10th April 2026
28AQI (US)
28AQI (US)
11th April 2026
19AQI (US)
19AQI (US)
12th April 2026
16AQI (US)
16AQI (US)
13th April 2026
17AQI (US)
17AQI (US)
14th April 2026
17AQI (US)
17AQI (US)
15th April 2026
23AQI (US)
23AQI (US)
16th April 2026
20AQI (US)
20AQI (US)
17th April 2026
18th April 2026
20AQI (US)
20AQI (US)
19th April 2026
17AQI (US)
17AQI (US)
20th April 2026
20AQI (US)
20AQI (US)
21st April 2026
19AQI (US)
19AQI (US)
22nd April 2026
23rd April 2026
34AQI (US)
34AQI (US)
24th April 2026
21AQI (US)
21AQI (US)
25th April 2026
17AQI (US)
17AQI (US)
26th April 2026
17AQI (US)
17AQI (US)
27th April 2026
15AQI (US)
15AQI (US)
28th April 2026
19AQI (US)
19AQI (US)
29th April 2026
15AQI (US)
15AQI (US)
30th April 2026
17AQI (US)
17AQI (US)
1st May 2026
15AQI (US)
15AQI (US)
2nd May 2026
13AQI (US)
13AQI (US)
3rd May 2026
13AQI (US)
13AQI (US)
4th May 2026
20AQI (US)
20AQI (US)
5th May 2026
26AQI (US)
26AQI (US)
6th May 2026
22AQI (US)
22AQI (US)
7th May 2026
14AQI (US)
14AQI (US)
8th May 2026
18AQI (US)
18AQI (US)
9th May 2026
10th May 2026
25AQI (US)
25AQI (US)
11th May 2026
16AQI (US)
16AQI (US)
12th May 2026
26AQI (US)
26AQI (US)
13th May 2026
31AQI (US)
31AQI (US)
14th May 2026
30AQI (US)
30AQI (US)
15th May 2026
26AQI (US)
26AQI (US)
16th May 2026
21AQI (US)
21AQI (US)
17th May 2026
18AQI (US)
18AQI (US)
18th May 2026
33AQI (US)
33AQI (US)
19th May 2026
28AQI (US)
28AQI (US)
20th May 2026
18AQI (US)
18AQI (US)
21st May 2026
20AQI (US)
20AQI (US)
22nd May 2026
22AQI (US)
22AQI (US)
23rd May 2026
24AQI (US)
24AQI (US)
24th May 2026
20AQI (US)
20AQI (US)
25th May 2026
18AQI (US)
18AQI (US)
26th May 2026
17AQI (US)
17AQI (US)
27th May 2026
14AQI (US)
14AQI (US)
28th May 2026
18AQI (US)
18AQI (US)
29th May 2026
16AQI (US)
16AQI (US)
30th May 2026
13AQI (US)
13AQI (US)
31st May 2026
15AQI (US)
15AQI (US)
1st June 2026
16AQI (US)
16AQI (US)
2nd June 2026
16AQI (US)
16AQI (US)
3rd June 2026
18AQI (US)
18AQI (US)
4th June 2026
18AQI (US)
18AQI (US)
5th June 2026
25AQI (US)
25AQI (US)
6th June 2026
20AQI (US)
20AQI (US)
7th June 2026
22AQI (US)
22AQI (US)
8th June 2026
25AQI (US)
25AQI (US)
9th June 2026
20AQI (US)
20AQI (US)
10th June 2026
33AQI (US)
33AQI (US)
11th June 2026
27AQI (US)
27AQI (US)
12th June 2026
24AQI (US)
24AQI (US)
13th June 2026
23AQI (US)
23AQI (US)
14th June 2026
21AQI (US)
21AQI (US)
15th June 2026
20AQI (US)
20AQI (US)
16th June 2026
21AQI (US)
21AQI (US)
17th June 2026
30AQI (US)
30AQI (US)
18th June 2026
28AQI (US)
28AQI (US)
19th June 2026
34AQI (US)
34AQI (US)
20th June 2026
36AQI (US)
36AQI (US)
21st June 2026
23AQI (US)
23AQI (US)
22nd June 2026
22AQI (US)
22AQI (US)
23rd June 2026
35AQI (US)
35AQI (US)
24th June 2026
22AQI (US)
22AQI (US)
25th June 2026
15AQI (US)
15AQI (US)
26th June 2026
13AQI (US)
13AQI (US)
27th June 2026
15AQI (US)
15AQI (US)
28th June 2026
45AQI (US)
45AQI (US)
29th June 2026
27AQI (US)
27AQI (US)
30th June 2026
30AQI (US)
30AQI (US)
1st July 2026
40AQI (US)
40AQI (US)
2nd July 2026
35AQI (US)
35AQI (US)
3rd July 2026
36AQI (US)
36AQI (US)
4th July 2026
23AQI (US)
23AQI (US)
5th July 2026
23AQI (US)
23AQI (US)
6th July 2026
36AQI (US)
36AQI (US)
7th July 2026
40AQI (US)
40AQI (US)
8th July 2026
22AQI (US)
22AQI (US)
9th July 2026
13AQI (US)
13AQI (US)
10th July 2026
15AQI (US)
15AQI (US)
11th July 2026
12AQI (US)
12AQI (US)
12th July 2026
13AQI (US)
13AQI (US)
13th July 2026
20AQI (US)
20AQI (US)
14th July 2026
22AQI (US)
22AQI (US)
15th July 2026
22AQI (US)
22AQI (US)
16th July 2026
24AQI (US)
24AQI (US)
17th July 2026
27AQI (US)
27AQI (US)
18th July 2026
33AQI (US)
33AQI (US)
19th July 2026
28AQI (US)
28AQI (US)
20th July 2026
34AQI (US)
34AQI (US)
21st July 2026
36AQI (US)
36AQI (US)
22nd July 2026
29AQI (US)
29AQI (US)
23rd July 2026
30AQI (US)
30AQI (US)
24th July 2026
31AQI (US)
31AQI (US)
25th July 2026
28AQI (US)
28AQI (US)
26th July 2026
26AQI (US)
26AQI (US)
27th July 2026
26AQI (US)
26AQI (US)
28th July 2026
33AQI (US)
33AQI (US)
29th July 2026
35AQI (US)
35AQI (US)
30th July 2026
30AQI (US)
30AQI (US)
31st July 2026
28AQI (US)
28AQI (US)
1st August 2026
29AQI (US)
29AQI (US)
2nd August 2026
28AQI (US)
28AQI (US)
3rd August 2026
59AQI (US)
59AQI (US)
4th August 2026
61AQI (US)
61AQI (US)
5th August 2026
53AQI (US)
53AQI (US)
6th August 2026
49AQI (US)
49AQI (US)
7th August 2026
52AQI (US)
52AQI (US)
8th August 2026
48AQI (US)
48AQI (US)
9th August 2026
31AQI (US)
31AQI (US)
10th August 2026
38AQI (US)
38AQI (US)
11th August 2026
30AQI (US)
30AQI (US)
12th August 2026
28AQI (US)
28AQI (US)
13th August 2026
30AQI (US)
30AQI (US)
14th August 2026
28AQI (US)
28AQI (US)
15th August 2026
28AQI (US)
28AQI (US)
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026
22AQI (US)
22AQI (US)
22AQI (US)
21AQI (US)
20AQI (US)
24AQI (US)
27AQI (US)
39AQI (US)
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202624AQI (US)
31
28
31
28
30
30
31
11
4
220
4
Highest AQI (US) recorded in
August39AQI (US)
Lowest AQI (US) recorded in
May20AQI (US)
202530AQI (US)
6
29
1
31
30
28
3
26
5
25
5
31
30
31
267
14
Highest AQI (US) recorded in
August41AQI (US)
Lowest AQI (US) recorded in
May22AQI (US)
Most & Least Polluted Years Over the Last 2 Years
Most Polluted Year Recorded
2025(Avg.)
30AQI (US)Least Polluted Year Recorded
2026(Avg.)
24AQI (US)20th Street's annual 2026 AQI (US) (24) shows an average percentage change of -20% (improved AQI (US)) compared to previous years: 2025 (30).
