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
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2025
74AQILowest AQI recorded on
3rd Aug 2025
23AQISame Day Analysis (6th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 74 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 6th Aug - 7th Aug 2025
20th Street, Boulder, Colorado, United States
AQI
Day
Night
.
5 AM6th Aug 2025
8 PM
4 AM7th Aug 2025
Day time
Avg. Highest Time
6AM6th Aug
82AQI
Avg. Lowest Time
8PM6th Aug
56AQI
Night time
Avg. Highest Time
5AM6th Aug
98AQI
Avg. Lowest Time
11PM6th Aug
52AQI
In the last 24 hours,
20th Street's AQI reached its highest point of 98 at 5 AM during the Night, while the lowest point, 52, was recorded at 11 PM during the Night between 6th Aug and 7th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
20th Street, Boulder, Colorado, United States
JulAug
08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th
Day
Night
8th Jul 2025325 AMAQI
8th Jul 2025276 AMAQI
8th Jul 2025297 AMAQI
8th Jul 2025298 AMAQI
8th Jul 2025309 AMAQI
8th Jul 20253110 AMAQI
8th Jul 20253211 AMAQI
8th Jul 20253612 PMAQI
8th Jul 2025341 PMAQI
8th Jul 2025352 PMAQI
8th Jul 2025353 PMAQI
8th Jul 2025364 PMAQI
8th Jul 2025365 PMAQI
8th Jul 2025306 PMAQI
8th Jul 2025327 PMAQI
8th Jul 2025308 PMAQI
8th Jul 2025279 PMAQI
8th Jul 20252810 PMAQI
8th Jul 20253211 PMAQI
9th Jul 20253112 AMAQI
9th Jul 2025321 AMAQI
9th Jul 2025282 AMAQI
9th Jul 2025283 AMAQI
9th Jul 2025284 AMAQI
25°C15/35°C
9th Jul 2025275 AMAQI
9th Jul 2025246 AMAQI
9th Jul 2025267 AMAQI
9th Jul 2025258 AMAQI
9th Jul 2025289 AMAQI
9th Jul 20253110 AMAQI
9th Jul 20253411 AMAQI
9th Jul 20253612 PMAQI
9th Jul 2025321 PMAQI
9th Jul 2025282 PMAQI
9th Jul 2025263 PMAQI
9th Jul 2025254 PMAQI
9th Jul 2025235 PMAQI
9th Jul 2025226 PMAQI
9th Jul 2025277 PMAQI
9th Jul 2025268 PMAQI
9th Jul 2025289 PMAQI
9th Jul 20253110 PMAQI
9th Jul 20253011 PMAQI
10th Jul 20253112 AMAQI
10th Jul 2025271 AMAQI
10th Jul 2025262 AMAQI
10th Jul 2025243 AMAQI
10th Jul 2025254 AMAQI
29°C21/37°C
10th Jul 2025215 AMAQI
10th Jul 2025186 AMAQI
10th Jul 2025197 AMAQI
10th Jul 2025208 AMAQI
10th Jul 2025229 AMAQI
10th Jul 20252410 AMAQI
10th Jul 20252611 AMAQI
10th Jul 20252512 PMAQI
10th Jul 2025241 PMAQI
10th Jul 2025262 PMAQI
10th Jul 2025343 PMAQI
10th Jul 2025524 PMAQI
10th Jul 2025565 PMAQI
10th Jul 2025566 PMAQI
10th Jul 2025337 PMAQI
10th Jul 2025318 PMAQI
10th Jul 2025529 PMAQI
10th Jul 20255010 PMAQI
10th Jul 20254111 PMAQI
11th Jul 20253812 AMAQI
11th Jul 2025381 AMAQI
11th Jul 2025382 AMAQI
11th Jul 2025343 AMAQI
11th Jul 2025344 AMAQI
26°C18/32°C
11th Jul 2025395 AMAQI
11th Jul 2025366 AMAQI
11th Jul 2025347 AMAQI
11th Jul 2025348 AMAQI
11th Jul 2025369 AMAQI
11th Jul 20253610 AMAQI
11th Jul 20253811 AMAQI
11th Jul 20253812 PMAQI
11th Jul 2025401 PMAQI
11th Jul 2025352 PMAQI
11th Jul 2025373 PMAQI
11th Jul 2025374 PMAQI
11th Jul 2025375 PMAQI
11th Jul 2025376 PMAQI
11th Jul 2025387 PMAQI
11th Jul 2025398 PMAQI
11th Jul 2025409 PMAQI
11th Jul 20254310 PMAQI
11th Jul 20255211 PMAQI
12th Jul 20255612 AMAQI
12th Jul 2025631 AMAQI
12th Jul 2025592 AMAQI
12th Jul 2025593 AMAQI
12th Jul 2025594 AMAQI
20°C13/27°C
12th Jul 2025685 AMAQI
12th Jul 2025656 AMAQI
12th Jul 2025627 AMAQI
12th Jul 2025628 AMAQI
12th Jul 2025619 AMAQI
12th Jul 20256110 AMAQI
12th Jul 20256211 AMAQI
12th Jul 20256212 PMAQI
12th Jul 2025611 PMAQI
12th Jul 2025602 PMAQI
12th Jul 2025613 PMAQI
12th Jul 2025604 PMAQI
12th Jul 2025605 PMAQI
12th Jul 2025586 PMAQI
12th Jul 2025607 PMAQI
12th Jul 2025578 PMAQI
12th Jul 2025549 PMAQI
12th Jul 20255410 PMAQI
12th Jul 20255411 PMAQI
13th Jul 20255412 AMAQI
13th Jul 2025521 AMAQI
13th Jul 2025522 AMAQI
13th Jul 2025523 AMAQI
13th Jul 2025524 AMAQI
20°C12/27°C
13th Jul 2025425 AMAQI
13th Jul 2025426 AMAQI
13th Jul 2025427 AMAQI
13th Jul 2025388 AMAQI
13th Jul 2025389 AMAQI
13th Jul 20253810 AMAQI
13th Jul 20254311 AMAQI
13th Jul 20254412 PMAQI
13th Jul 2025471 PMAQI
13th Jul 2025482 PMAQI
13th Jul 2025473 PMAQI
13th Jul 2025464 PMAQI
13th Jul 2025445 PMAQI
13th Jul 2025436 PMAQI
13th Jul 2025467 PMAQI
13th Jul 2025468 PMAQI
13th Jul 2025429 PMAQI
13th Jul 20254210 PMAQI
13th Jul 20254411 PMAQI
14th Jul 20254412 AMAQI
14th Jul 2025401 AMAQI
14th Jul 2025362 AMAQI
14th Jul 2025313 AMAQI
14th Jul 2025324 AMAQI
25°C17/32°C
14th Jul 2025235 AMAQI
14th Jul 2025216 AMAQI
14th Jul 2025237 AMAQI
14th Jul 2025238 AMAQI
14th Jul 2025269 AMAQI
14th Jul 20252610 AMAQI
14th Jul 20252811 AMAQI
14th Jul 20253012 PMAQI
14th Jul 2025341 PMAQI
14th Jul 2025322 PMAQI
14th Jul 2025333 PMAQI
14th Jul 2025334 PMAQI
14th Jul 2025325 PMAQI
14th Jul 2025326 PMAQI
14th Jul 2025317 PMAQI
14th Jul 2025288 PMAQI
14th Jul 2025249 PMAQI
14th Jul 20252510 PMAQI
14th Jul 20252611 PMAQI
15th Jul 20252712 AMAQI
15th Jul 2025271 AMAQI
15th Jul 2025282 AMAQI
15th Jul 2025273 AMAQI
15th Jul 2025284 AMAQI
26°C20/35°C
15th Jul 2025285 AMAQI
15th Jul 2025276 AMAQI
15th Jul 2025287 AMAQI
15th Jul 2025308 AMAQI
15th Jul 2025339 AMAQI
15th Jul 20253710 AMAQI
15th Jul 20254111 AMAQI
15th Jul 20253912 PMAQI
15th Jul 2025371 PMAQI
15th Jul 2025372 PMAQI
15th Jul 2025333 PMAQI
15th Jul 2025344 PMAQI
15th Jul 2025335 PMAQI
15th Jul 2025336 PMAQI
15th Jul 2025327 PMAQI
15th Jul 2025328 PMAQI
15th Jul 2025339 PMAQI
15th Jul 20253310 PMAQI
15th Jul 20253411 PMAQI
16th Jul 20253412 AMAQI
16th Jul 2025361 AMAQI
16th Jul 2025352 AMAQI
16th Jul 2025363 AMAQI
16th Jul 2025374 AMAQI
27°C20/35°C
16th Jul 2025395 AMAQI
16th Jul 2025406 AMAQI
16th Jul 2025397 AMAQI
16th Jul 2025418 AMAQI
16th Jul 2025419 AMAQI
16th Jul 20254310 AMAQI
16th Jul 20254411 AMAQI
16th Jul 20254312 PMAQI
16th Jul 2025461 PMAQI
16th Jul 2025462 PMAQI
16th Jul 2025493 PMAQI
16th Jul 2025504 PMAQI
16th Jul 2025525 PMAQI
16th Jul 2025536 PMAQI
16th Jul 2025467 PMAQI
16th Jul 2025448 PMAQI
16th Jul 2025519 PMAQI
16th Jul 20255210 PMAQI
16th Jul 20254411 PMAQI
17th Jul 20253912 AMAQI
17th Jul 2025361 AMAQI
17th Jul 2025322 AMAQI
17th Jul 2025313 AMAQI
17th Jul 2025344 AMAQI
20°C14/28°C
17th Jul 2025355 AMAQI
17th Jul 2025346 AMAQI
17th Jul 2025397 AMAQI
17th Jul 2025408 AMAQI
17th Jul 2025459 AMAQI
17th Jul 20254810 AMAQI
17th Jul 20255111 AMAQI
17th Jul 20255312 PMAQI
17th Jul 2025531 PMAQI
17th Jul 2025552 PMAQI
17th Jul 2025553 PMAQI
17th Jul 2025564 PMAQI
17th Jul 2025575 PMAQI
17th Jul 2025566 PMAQI
17th Jul 2025537 PMAQI
17th Jul 2025508 PMAQI
17th Jul 2025549 PMAQI
17th Jul 20255310 PMAQI
17th Jul 20255211 PMAQI
18th Jul 20255212 AMAQI
18th Jul 2025501 AMAQI
18th Jul 2025522 AMAQI
18th Jul 2025523 AMAQI
18th Jul 2025514 AMAQI
22°C15/30°C
18th Jul 2025505 AMAQI
18th Jul 2025526 AMAQI
18th Jul 2025527 AMAQI
18th Jul 2025528 AMAQI
18th Jul 2025549 AMAQI
18th Jul 20255510 AMAQI
18th Jul 20255511 AMAQI
18th Jul 20255412 PMAQI
18th Jul 2025541 PMAQI
18th Jul 2025562 PMAQI
18th Jul 2025553 PMAQI
18th Jul 2025554 PMAQI
18th Jul 2025555 PMAQI
18th Jul 2025566 PMAQI
18th Jul 2025537 PMAQI
18th Jul 2025528 PMAQI
18th Jul 2025529 PMAQI
18th Jul 20255210 PMAQI
18th Jul 20255211 PMAQI
19th Jul 20255212 AMAQI
19th Jul 2025521 AMAQI
19th Jul 2025492 AMAQI
19th Jul 2025483 AMAQI
19th Jul 2025414 AMAQI
24°C15/34°C
19th Jul 2025385 AMAQI
19th Jul 2025356 AMAQI
19th Jul 2025357 AMAQI
19th Jul 2025358 AMAQI
19th Jul 2025359 AMAQI
19th Jul 20253510 AMAQI
19th Jul 20253811 AMAQI
19th Jul 20254112 PMAQI
19th Jul 2025431 PMAQI
19th Jul 2025432 PMAQI
19th Jul 2025463 PMAQI
19th Jul 2025444 PMAQI
19th Jul 2025435 PMAQI
19th Jul 2025426 PMAQI
19th Jul 2025427 PMAQI
19th Jul 2025438 PMAQI
19th Jul 2025429 PMAQI
19th Jul 20254110 PMAQI
19th Jul 20254011 PMAQI
20th Jul 20254012 AMAQI
20th Jul 2025421 AMAQI
20th Jul 2025442 AMAQI
20th Jul 2025433 AMAQI
20th Jul 2025404 AMAQI
25°C18/33°C
20th Jul 2025315 AMAQI
20th Jul 2025266 AMAQI
20th Jul 2025287 AMAQI
20th Jul 2025308 AMAQI
20th Jul 2025309 AMAQI
20th Jul 20252910 AMAQI
20th Jul 20252811 AMAQI
20th Jul 20252812 PMAQI
20th Jul 2025291 PMAQI
20th Jul 2025302 PMAQI
20th Jul 2025323 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025325 PMAQI
20th Jul 2025326 PMAQI
20th Jul 2025307 PMAQI
20th Jul 2025298 PMAQI
20th Jul 2025289 PMAQI
20th Jul 20252810 PMAQI
20th Jul 20252811 PMAQI
21st Jul 20252812 AMAQI
21st Jul 2025271 AMAQI
21st Jul 2025262 AMAQI
21st Jul 2025273 AMAQI
21st Jul 2025284 AMAQI
25°C20/34°C
21st Jul 2025255 AMAQI
21st Jul 2025266 AMAQI
21st Jul 2025287 AMAQI
21st Jul 2025298 AMAQI
21st Jul 2025319 AMAQI
21st Jul 20253310 AMAQI
21st Jul 20253511 AMAQI
21st Jul 20253412 PMAQI
21st Jul 2025341 PMAQI
21st Jul 2025342 PMAQI
21st Jul 2025343 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025335 PMAQI
21st Jul 2025336 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025308 PMAQI
21st Jul 2025329 PMAQI
21st Jul 20253410 PMAQI
21st Jul 20253311 PMAQI
22nd Jul 20253412 AMAQI
22nd Jul 2025341 AMAQI
22nd Jul 2025332 AMAQI
22nd Jul 2025333 AMAQI
22nd Jul 2025304 AMAQI
25°C20/34°C
22nd Jul 2025265 AMAQI
22nd Jul 2025226 AMAQI
22nd Jul 2025237 AMAQI
22nd Jul 2025228 AMAQI
22nd Jul 2025249 AMAQI
22nd Jul 20252710 AMAQI
22nd Jul 20253011 AMAQI
22nd Jul 20253012 PMAQI
22nd Jul 2025311 PMAQI
22nd Jul 2025322 PMAQI
22nd Jul 2025313 PMAQI
22nd Jul 2025334 PMAQI
22nd Jul 2025335 PMAQI
22nd Jul 2025316 PMAQI
22nd Jul 2025297 PMAQI
22nd Jul 2025308 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252310 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025231 AMAQI
23rd Jul 2025242 AMAQI
23rd Jul 2025243 AMAQI
23rd Jul 2025244 AMAQI
25°C20/33°C
23rd Jul 2025235 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025228 AMAQI
23rd Jul 2025249 AMAQI
23rd Jul 20252610 AMAQI
23rd Jul 20252611 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025301 PMAQI
23rd Jul 2025322 PMAQI
23rd Jul 2025323 PMAQI
23rd Jul 2025334 PMAQI
23rd Jul 2025345 PMAQI
23rd Jul 2025326 PMAQI
23rd Jul 2025257 PMAQI
23rd Jul 2025268 PMAQI
23rd Jul 2025309 PMAQI
23rd Jul 20252910 PMAQI
23rd Jul 20252911 PMAQI
24th Jul 20252712 AMAQI
24th Jul 2025271 AMAQI
24th Jul 2025292 AMAQI
24th Jul 2025383 AMAQI
24th Jul 2025334 AMAQI
22°C17/29°C
24th Jul 2025325 AMAQI
24th Jul 2025306 AMAQI
24th Jul 2025307 AMAQI
24th Jul 2025308 AMAQI
24th Jul 2025319 AMAQI
24th Jul 20253010 AMAQI
24th Jul 20253211 AMAQI
24th Jul 20253412 PMAQI
24th Jul 2025371 PMAQI
24th Jul 2025382 PMAQI
24th Jul 2025383 PMAQI
24th Jul 2025384 PMAQI
24th Jul 2025395 PMAQI
24th Jul 2025416 PMAQI
24th Jul 2025357 PMAQI
24th Jul 2025368 PMAQI
24th Jul 2025469 PMAQI
24th Jul 20254810 PMAQI
24th Jul 20254511 PMAQI
25th Jul 20253912 AMAQI
25th Jul 2025321 AMAQI
25th Jul 2025362 AMAQI
25th Jul 2025383 AMAQI
25th Jul 2025404 AMAQI
19°C15/28°C
25th Jul 2025435 AMAQI
25th Jul 2025466 AMAQI
25th Jul 2025447 AMAQI
25th Jul 2025468 AMAQI
25th Jul 2025489 AMAQI
25th Jul 20255110 AMAQI
25th Jul 20255011 AMAQI
25th Jul 20255012 PMAQI
25th Jul 2025481 PMAQI
25th Jul 2025482 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025504 PMAQI
25th Jul 2025525 PMAQI
25th Jul 2025526 PMAQI
25th Jul 2025477 PMAQI
25th Jul 2025458 PMAQI
25th Jul 2025489 PMAQI
25th Jul 20254710 PMAQI
25th Jul 20255011 PMAQI
26th Jul 20255012 AMAQI
26th Jul 2025511 AMAQI
26th Jul 2025502 AMAQI
26th Jul 2025503 AMAQI
26th Jul 2025514 AMAQI
23°C15/33°C
26th Jul 2025515 AMAQI
26th Jul 2025516 AMAQI
26th Jul 2025527 AMAQI
26th Jul 2025508 AMAQI
26th Jul 2025529 AMAQI
26th Jul 20255210 AMAQI
26th Jul 20255111 AMAQI
26th Jul 20255212 PMAQI
26th Jul 2025521 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025523 PMAQI
26th Jul 2025474 PMAQI
26th Jul 2025465 PMAQI
26th Jul 2025436 PMAQI
26th Jul 2025457 PMAQI
26th Jul 2025468 PMAQI
26th Jul 2025349 PMAQI
26th Jul 20253310 PMAQI
26th Jul 20253211 PMAQI
27th Jul 20253012 AMAQI
27th Jul 2025301 AMAQI
27th Jul 2025332 AMAQI
27th Jul 2025323 AMAQI
27th Jul 2025304 AMAQI
24°C18/34°C
27th Jul 2025235 AMAQI
27th Jul 2025216 AMAQI
27th Jul 2025207 AMAQI
27th Jul 2025208 AMAQI
27th Jul 2025209 AMAQI
27th Jul 20252010 AMAQI
27th Jul 20252011 AMAQI
27th Jul 20252112 PMAQI
27th Jul 2025191 PMAQI
27th Jul 2025202 PMAQI
27th Jul 2025223 PMAQI
27th Jul 2025224 PMAQI
27th Jul 2025225 PMAQI
27th Jul 2025226 PMAQI
27th Jul 2025217 PMAQI
27th Jul 2025228 PMAQI
27th Jul 2025239 PMAQI
27th Jul 20252410 PMAQI
27th Jul 20252611 PMAQI
28th Jul 20252612 AMAQI
28th Jul 2025261 AMAQI
28th Jul 2025262 AMAQI
28th Jul 2025263 AMAQI
28th Jul 2025264 AMAQI
25°C17/34°C
28th Jul 2025245 AMAQI
28th Jul 2025246 AMAQI
28th Jul 2025237 AMAQI
28th Jul 2025248 AMAQI
28th Jul 2025269 AMAQI
28th Jul 20252810 AMAQI
28th Jul 20253311 AMAQI
28th Jul 20253312 PMAQI
28th Jul 2025341 PMAQI
28th Jul 2025342 PMAQI
28th Jul 2025313 PMAQI
28th Jul 2025284 PMAQI
28th Jul 2025275 PMAQI
28th Jul 2025276 PMAQI
28th Jul 2025267 PMAQI
28th Jul 2025268 PMAQI
28th Jul 2025279 PMAQI
28th Jul 20252710 PMAQI
28th Jul 20253111 PMAQI
29th Jul 20253912 AMAQI
29th Jul 2025431 AMAQI
29th Jul 2025472 AMAQI
29th Jul 2025503 AMAQI
29th Jul 2025504 AMAQI
27°C20/34°C
29th Jul 2025545 AMAQI
29th Jul 2025536 AMAQI
29th Jul 2025547 AMAQI
29th Jul 2025528 AMAQI
29th Jul 2025529 AMAQI
29th Jul 20255210 AMAQI
29th Jul 20255211 AMAQI
29th Jul 20255212 PMAQI
29th Jul 2025521 PMAQI
29th Jul 2025522 PMAQI
29th Jul 2025523 PMAQI
29th Jul 2025534 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025526 PMAQI
29th Jul 2025527 PMAQI
29th Jul 2025528 PMAQI
29th Jul 2025409 PMAQI
29th Jul 20253810 PMAQI
29th Jul 20253711 PMAQI
30th Jul 20253412 AMAQI
30th Jul 2025351 AMAQI
30th Jul 2025342 AMAQI
30th Jul 2025363 AMAQI
30th Jul 2025374 AMAQI
22°C17/28°C
30th Jul 2025355 AMAQI
30th Jul 2025326 AMAQI
30th Jul 2025347 AMAQI
30th Jul 2025358 AMAQI
30th Jul 2025379 AMAQI
30th Jul 20253610 AMAQI
30th Jul 20253811 AMAQI
30th Jul 20254012 PMAQI
30th Jul 2025411 PMAQI
30th Jul 2025422 PMAQI
30th Jul 2025423 PMAQI
30th Jul 2025424 PMAQI
30th Jul 2025425 PMAQI
30th Jul 2025426 PMAQI
30th Jul 2025427 PMAQI
30th Jul 2025428 PMAQI
30th Jul 2025449 PMAQI
30th Jul 20254610 PMAQI
30th Jul 20255011 PMAQI
31st Jul 20254712 AMAQI
31st Jul 2025461 AMAQI
31st Jul 2025482 AMAQI
31st Jul 2025463 AMAQI
31st Jul 2025464 AMAQI
18°C14/23°C
31st Jul 2025485 AMAQI
31st Jul 2025526 AMAQI
31st Jul 2025527 AMAQI
31st Jul 2025528 AMAQI
31st Jul 2025529 AMAQI
31st Jul 20255410 AMAQI
31st Jul 20255311 AMAQI
31st Jul 20255312 PMAQI
31st Jul 2025551 PMAQI
31st Jul 2025552 PMAQI
31st Jul 2025563 PMAQI
31st Jul 2025564 PMAQI
31st Jul 2025585 PMAQI
31st Jul 2025596 PMAQI
31st Jul 2025527 PMAQI
31st Jul 2025558 PMAQI
31st Jul 2025549 PMAQI
31st Jul 20255410 PMAQI
31st Jul 20255411 PMAQI
1st Aug 20255412 AMAQI
1st Aug 2025501 AMAQI
1st Aug 2025502 AMAQI
1st Aug 2025483 AMAQI
1st Aug 2025504 AMAQI
20°C13/30°C
1st Aug 2025515 AMAQI
1st Aug 2025526 AMAQI
1st Aug 2025517 AMAQI
1st Aug 2025528 AMAQI
1st Aug 2025529 AMAQI
1st Aug 20255210 AMAQI
1st Aug 20255211 AMAQI
1st Aug 20255312 PMAQI
1st Aug 2025541 PMAQI
1st Aug 2025532 PMAQI
1st Aug 2025543 PMAQI
1st Aug 2025544 PMAQI
1st Aug 2025565 PMAQI
1st Aug 2025556 PMAQI
1st Aug 2025527 PMAQI
1st Aug 2025518 PMAQI
1st Aug 2025449 PMAQI
1st Aug 20253610 PMAQI
1st Aug 20252911 PMAQI
2nd Aug 20252612 AMAQI
2nd Aug 2025311 AMAQI
2nd Aug 2025352 AMAQI
2nd Aug 2025363 AMAQI
2nd Aug 2025374 AMAQI
21°C12/32°C
2nd Aug 2025365 AMAQI
2nd Aug 2025356 AMAQI
2nd Aug 2025367 AMAQI
2nd Aug 2025358 AMAQI
2nd Aug 2025349 AMAQI
2nd Aug 20253510 AMAQI
2nd Aug 20253611 AMAQI
2nd Aug 20253612 PMAQI
2nd Aug 2025361 PMAQI
2nd Aug 2025342 PMAQI
2nd Aug 2025313 PMAQI
2nd Aug 2025314 PMAQI
2nd Aug 2025325 PMAQI
2nd Aug 2025296 PMAQI
2nd Aug 2025347 PMAQI
2nd Aug 2025308 PMAQI
2nd Aug 2025259 PMAQI
2nd Aug 20252410 PMAQI
2nd Aug 20252411 PMAQI
3rd Aug 20252312 AMAQI
3rd Aug 2025241 AMAQI
3rd Aug 2025232 AMAQI
3rd Aug 2025233 AMAQI
3rd Aug 2025244 AMAQI
21°C14/30°C
3rd Aug 2025235 AMAQI
3rd Aug 2025226 AMAQI
3rd Aug 2025227 AMAQI
3rd Aug 2025228 AMAQI
3rd Aug 2025249 AMAQI
3rd Aug 20252310 AMAQI
3rd Aug 20252411 AMAQI
3rd Aug 20252212 PMAQI
3rd Aug 2025221 PMAQI
3rd Aug 2025202 PMAQI
3rd Aug 2025193 PMAQI
3rd Aug 2025204 PMAQI
3rd Aug 2025215 PMAQI
3rd Aug 2025206 PMAQI
3rd Aug 2025237 PMAQI
3rd Aug 2025248 PMAQI
3rd Aug 2025229 PMAQI
3rd Aug 20252410 PMAQI
3rd Aug 20252411 PMAQI
4th Aug 20252612 AMAQI
4th Aug 2025251 AMAQI
4th Aug 2025252 AMAQI
4th Aug 2025263 AMAQI
4th Aug 2025264 AMAQI
22°C14/30°C
4th Aug 2025245 AMAQI
4th Aug 2025286 AMAQI
4th Aug 2025287 AMAQI
4th Aug 2025298 AMAQI
4th Aug 2025349 AMAQI
4th Aug 20253610 AMAQI
4th Aug 20253711 AMAQI
4th Aug 20253812 PMAQI
4th Aug 2025401 PMAQI
4th Aug 2025392 PMAQI
4th Aug 2025443 PMAQI
4th Aug 2025444 PMAQI
4th Aug 2025485 PMAQI
4th Aug 2025506 PMAQI
4th Aug 2025297 PMAQI
4th Aug 2025428 PMAQI
4th Aug 2025559 PMAQI
4th Aug 20255510 PMAQI
4th Aug 20255511 PMAQI
5th Aug 20255412 AMAQI
5th Aug 2025541 AMAQI
5th Aug 2025522 AMAQI
5th Aug 2025523 AMAQI
5th Aug 2025524 AMAQI
24°C15/34°C
5th Aug 2025535 AMAQI
5th Aug 2025536 AMAQI
5th Aug 2025547 AMAQI
5th Aug 2025568 AMAQI
5th Aug 2025569 AMAQI
5th Aug 20255910 AMAQI
5th Aug 20256111 AMAQI
5th Aug 20256012 PMAQI
5th Aug 2025601 PMAQI
5th Aug 2025622 PMAQI
5th Aug 2025603 PMAQI
5th Aug 2025564 PMAQI
5th Aug 2025515 PMAQI
5th Aug 2025436 PMAQI
5th Aug 2025557 PMAQI
5th Aug 2025488 PMAQI
5th Aug 2025429 PMAQI
5th Aug 20255110 PMAQI
5th Aug 20255711 PMAQI
6th Aug 20256712 AMAQI
6th Aug 2025881 AMAQI
6th Aug 20251042 AMAQI
6th Aug 20251113 AMAQI
6th Aug 20251004 AMAQI
27°C17/36°C
6th Aug 2025985 AMAQI
6th Aug 2025826 AMAQI
6th Aug 2025727 AMAQI
6th Aug 2025628 AMAQI
6th Aug 2025589 AMAQI
6th Aug 20255810 AMAQI
6th Aug 20256011 AMAQI
6th Aug 20255912 PMAQI
6th Aug 2025601 PMAQI
6th Aug 2025622 PMAQI
6th Aug 2025633 PMAQI
6th Aug 2025584 PMAQI
6th Aug 2025575 PMAQI
6th Aug 2025566 PMAQI
6th Aug 2025607 PMAQI
6th Aug 2025568 PMAQI
6th Aug 2025529 PMAQI
6th Aug 20255210 PMAQI
6th Aug 20255211 PMAQI
7th Aug 20255712 AMAQI
7th Aug 2025621 AMAQI
7th Aug 2025592 AMAQI
7th Aug 2025603 AMAQI
7th Aug 2025554 AMAQI
28°C19/37°C
7th Aug 2025515 AMAQI
5 AM7th Aug 2025506 AMAQI
7th Aug 2025527 AMAQI
7th Aug 2025488 AMAQI
7th Aug 2025529 AMAQI
7th Aug 20255210 AMAQI
7th Aug 20255211 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
40AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 10 AM
38AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 40), while the lowest AQI was between 5 AM to 10 AM (Avg. 38).
Night time
Avg. Highest Time
12 AM - 11 PM
40AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
40AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 40), while the lowest AQI was between 12 AM to 11 PM (Avg. 40).
2025 Days Vs Air Quality
20th Street, Boulder, Colorado, United States
2025
96%
128
4%
6
Total number of days with different AQI categories in last 219 days in 2025 (146 days remaining)
Good
128 DaysModerate
6 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 96%
Health Risk Level:
Very Low
In 2025, 96% of 219 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 2025
AQI
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.
1st March 2025
19AQI
19AQI
2nd March 2025
18AQI
18AQI
3rd March 2025
22AQI
22AQI
4th March 2025
18AQI
18AQI
5th March 2025
22AQI
22AQI
6th March 2025
40AQI
40AQI
1st April 2025
23AQI
23AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
17AQI
17AQI
4th April 2025
21AQI
21AQI
5th April 2025
24AQI
24AQI
6th April 2025
20AQI
20AQI
7th April 2025
27AQI
27AQI
8th April 2025
21AQI
21AQI
9th April 2025
42AQI
42AQI
10th April 2025
44AQI
44AQI
11th April 2025
37AQI
37AQI
12th April 2025
28AQI
28AQI
13th April 2025
24AQI
24AQI
14th April 2025
18AQI
18AQI
15th April 2025
32AQI
32AQI
16th April 2025
22AQI
22AQI
17th April 2025
20AQI
20AQI
18th April 2025
13AQI
13AQI
19th April 2025
25AQI
25AQI
20th April 2025
18AQI
18AQI
21st April 2025
15AQI
15AQI
22nd April 2025
19AQI
19AQI
23rd April 2025
26AQI
26AQI
24th April 2025
52AQI
52AQI
25th April 2025
24AQI
24AQI
26th April 2025
22AQI
22AQI
27th April 2025
25AQI
25AQI
28th April 2025
16AQI
16AQI
29th April 2025
16AQI
16AQI
30th April 2025
15AQI
15AQI
1st May 2025
15AQI
15AQI
2nd May 2025
18AQI
18AQI
3rd May 2025
19AQI
19AQI
4th May 2025
20AQI
20AQI
5th May 2025
19AQI
19AQI
6th May 2025
18AQI
18AQI
7th May 2025
18AQI
18AQI
8th May 2025
23AQI
23AQI
9th May 2025
20AQI
20AQI
10th May 2025
23AQI
23AQI
11th May 2025
24AQI
24AQI
12th May 2025
25AQI
25AQI
13th May 2025
27AQI
27AQI
14th May 2025
42AQI
42AQI
15th May 2025
15AQI
15AQI
16th May 2025
16AQI
16AQI
17th May 2025
17AQI
17AQI
18th May 2025
29AQI
29AQI
19th May 2025
14AQI
14AQI
20th May 2025
18AQI
18AQI
21st May 2025
18AQI
18AQI
22nd May 2025
21AQI
21AQI
23rd May 2025
30AQI
30AQI
24th May 2025
43AQI
43AQI
25th May 2025
17AQI
17AQI
26th May 2025
18AQI
18AQI
27th May 2025
28AQI
28AQI
28th May 2025
23AQI
23AQI
29th May 2025
18AQI
18AQI
30th May 2025
24AQI
24AQI
31st May 2025
26AQI
26AQI
1st June 2025
33AQI
33AQI
2nd June 2025
23AQI
23AQI
3rd June 2025
20AQI
20AQI
4th June 2025
34AQI
34AQI
5th June 2025
33AQI
33AQI
6th June 2025
25AQI
25AQI
7th June 2025
23AQI
23AQI
8th June 2025
33AQI
33AQI
9th June 2025
44AQI
44AQI
10th June 2025
36AQI
36AQI
11th June 2025
26AQI
26AQI
12th June 2025
25AQI
25AQI
13th June 2025
28AQI
28AQI
14th June 2025
38AQI
38AQI
15th June 2025
31AQI
31AQI
16th June 2025
28AQI
28AQI
17th June 2025
28AQI
28AQI
18th June 2025
26AQI
26AQI
19th June 2025
31AQI
31AQI
20th June 2025
35AQI
35AQI
21st June 2025
32AQI
32AQI
22nd June 2025
34AQI
34AQI
23rd June 2025
39AQI
39AQI
24th June 2025
47AQI
47AQI
25th June 2025
35AQI
35AQI
26th June 2025
27AQI
27AQI
27th June 2025
37AQI
37AQI
28th June 2025
37AQI
37AQI
29th June 2025
34AQI
34AQI
30th June 2025
30AQI
30AQI
1st July 2025
37AQI
37AQI
2nd July 2025
31AQI
31AQI
3rd July 2025
27AQI
27AQI
4th July 2025
25AQI
25AQI
5th July 2025
34AQI
34AQI
6th July 2025
29AQI
29AQI
7th July 2025
28AQI
28AQI
8th July 2025
31AQI
31AQI
9th July 2025
28AQI
28AQI
10th July 2025
32AQI
32AQI
11th July 2025
38AQI
38AQI
12th July 2025
60AQI
60AQI
13th July 2025
46AQI
46AQI
14th July 2025
30AQI
30AQI
15th July 2025
32AQI
32AQI
16th July 2025
43AQI
43AQI
17th July 2025
46AQI
46AQI
18th July 2025
53AQI
53AQI
19th July 2025
42AQI
42AQI
20th July 2025
33AQI
33AQI
21st July 2025
30AQI
30AQI
22nd July 2025
29AQI
29AQI
23rd July 2025
27AQI
27AQI
24th July 2025
35AQI
35AQI
25th July 2025
45AQI
45AQI
26th July 2025
47AQI
47AQI
27th July 2025
24AQI
24AQI
28th July 2025
27AQI
27AQI
29th July 2025
49AQI
49AQI
30th July 2025
39AQI
39AQI
31st July 2025
52AQI
52AQI
1st August 2025
50AQI
50AQI
2nd August 2025
32AQI
32AQI
3rd August 2025
23AQI
23AQI
4th August 2025
37AQI
37AQI
5th August 2025
54AQI
54AQI
6th August 2025
74AQI
74AQI
23AQI
24AQI
22AQI
32AQI
36AQI
45AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202529AQI
6
29
1
31
30
28
3
4
2
128
6
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
May22AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
29AQILeast Polluted Year Recorded
2025(Avg.)
29AQI20th Street's annual 2025 AQI (29) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
