Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Welby, 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

Welby, Colorado, United States

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
19th Aug 2023
79AQI
Lowest AQI recorded on
25th Aug 2024
19AQI

Same Day Analysis (13th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 3rd highest AQI at 32 of Good air quality, showing improvement over 2025 and 2023 on the same day.

Day & Night AQI Trend: 12th Aug - 13th Aug 2026

Welby, Colorado, United States

AQI
Day
Night
.

5 AM12th Aug 2026

8 PM

4 AM13th Aug 2026

Day time
Avg. Highest Time
10AM12th Aug

96AQI

Avg. Lowest Time
6AM12th Aug

29AQI

Night time
Avg. Highest Time
12AM13th Aug

38AQI

Avg. Lowest Time
11PM12th Aug

23AQI

In the last 24 hours,

Welby's AQI reached its highest point of 96 at 10 AM during the Day, while the lowest point, 23, was recorded at 11 PM during the Night between 12th Aug and 13th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Welby, Colorado, United States

JulAug
15th - 16th16th - 17th17th - 18th18th - 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
Day
Night
15th Jul 2026195 AMAQI
15th Jul 2026226 AMAQI
15th Jul 2026237 AMAQI
15th Jul 2026288 AMAQI
15th Jul 2026309 AMAQI
15th Jul 20262810 AMAQI
15th Jul 20263011 AMAQI
15th Jul 20262912 PMAQI
15th Jul 2026321 PMAQI
15th Jul 2026332 PMAQI
15th Jul 2026383 PMAQI
15th Jul 2026344 PMAQI
15th Jul 2026305 PMAQI
15th Jul 2026306 PMAQI
15th Jul 2026247 PMAQI
15th Jul 2026258 PMAQI
15th Jul 2026249 PMAQI
15th Jul 20262810 PMAQI
15th Jul 20262711 PMAQI
16th Jul 20262812 AMAQI
16th Jul 2026351 AMAQI
16th Jul 2026282 AMAQI
16th Jul 2026243 AMAQI
16th Jul 2026204 AMAQI

28°C20/35°C

16th Jul 2026185 AMAQI
16th Jul 2026186 AMAQI
16th Jul 2026247 AMAQI
16th Jul 2026348 AMAQI
16th Jul 2026329 AMAQI
16th Jul 20263410 AMAQI
16th Jul 20263411 AMAQI
16th Jul 20263812 PMAQI
16th Jul 2026381 PMAQI
16th Jul 2026382 PMAQI
16th Jul 2026363 PMAQI
16th Jul 2026364 PMAQI
16th Jul 2026355 PMAQI
16th Jul 2026286 PMAQI
16th Jul 2026247 PMAQI
16th Jul 2026228 PMAQI
16th Jul 2026219 PMAQI
16th Jul 20262010 PMAQI
16th Jul 20261411 PMAQI
17th Jul 20261212 AMAQI
17th Jul 2026151 AMAQI
17th Jul 2026172 AMAQI
17th Jul 2026293 AMAQI
17th Jul 2026184 AMAQI

27°C20/35°C

17th Jul 2026295 AMAQI
17th Jul 2026296 AMAQI
17th Jul 2026337 AMAQI
17th Jul 2026298 AMAQI
17th Jul 2026279 AMAQI
17th Jul 20263110 AMAQI
17th Jul 20263111 AMAQI
17th Jul 20263012 PMAQI
17th Jul 2026361 PMAQI
17th Jul 2026382 PMAQI
17th Jul 2026363 PMAQI
17th Jul 2026384 PMAQI
17th Jul 2026385 PMAQI
17th Jul 2026306 PMAQI
17th Jul 2026237 PMAQI
17th Jul 2026388 PMAQI
17th Jul 2026389 PMAQI
17th Jul 20263810 PMAQI
17th Jul 20263811 PMAQI
18th Jul 20263812 AMAQI
18th Jul 2026301 AMAQI
18th Jul 2026332 AMAQI
18th Jul 2026333 AMAQI
18th Jul 2026334 AMAQI

28°C22/35°C

18th Jul 2026335 AMAQI
18th Jul 2026336 AMAQI
18th Jul 2026297 AMAQI
18th Jul 2026338 AMAQI
18th Jul 2026339 AMAQI
18th Jul 20263310 AMAQI
18th Jul 20263811 AMAQI
18th Jul 20263812 PMAQI
18th Jul 2026331 PMAQI
18th Jul 2026462 PMAQI
18th Jul 2026463 PMAQI
18th Jul 2026464 PMAQI
18th Jul 2026465 PMAQI
18th Jul 2026446 PMAQI
18th Jul 2026427 PMAQI
18th Jul 2026388 PMAQI
18th Jul 2026389 PMAQI
18th Jul 20264010 PMAQI
18th Jul 20262811 PMAQI
19th Jul 20263312 AMAQI
19th Jul 2026361 AMAQI
19th Jul 2026332 AMAQI
19th Jul 2026313 AMAQI
19th Jul 2026384 AMAQI

28°C20/36°C

19th Jul 2026365 AMAQI
19th Jul 2026366 AMAQI
19th Jul 2026307 AMAQI
19th Jul 2026348 AMAQI
19th Jul 2026299 AMAQI
19th Jul 20263410 AMAQI
19th Jul 20263811 AMAQI
19th Jul 20263412 PMAQI
19th Jul 2026291 PMAQI
19th Jul 2026312 PMAQI
19th Jul 2026293 PMAQI
19th Jul 2026254 PMAQI
19th Jul 2026335 PMAQI
19th Jul 2026256 PMAQI
19th Jul 2026217 PMAQI
19th Jul 2026338 PMAQI
19th Jul 2026319 PMAQI
19th Jul 20262910 PMAQI
19th Jul 20262911 PMAQI
20th Jul 20262912 AMAQI
20th Jul 2026291 AMAQI
20th Jul 2026292 AMAQI
20th Jul 2026293 AMAQI
20th Jul 2026334 AMAQI

29°C21/38°C

20th Jul 2026295 AMAQI
20th Jul 2026296 AMAQI
20th Jul 2026317 AMAQI
20th Jul 2026388 AMAQI
20th Jul 2026549 AMAQI
20th Jul 20263810 AMAQI
20th Jul 20264411 AMAQI
20th Jul 20264212 PMAQI
20th Jul 2026501 PMAQI
20th Jul 2026522 PMAQI
20th Jul 2026463 PMAQI
20th Jul 2026464 PMAQI
20th Jul 2026385 PMAQI
20th Jul 2026346 PMAQI
20th Jul 2026427 PMAQI
20th Jul 2026508 PMAQI
20th Jul 20264510 PMAQI
20th Jul 20264611 PMAQI
21st Jul 20265012 AMAQI
21st Jul 2026461 AMAQI
21st Jul 2026422 AMAQI
21st Jul 2026453 AMAQI
21st Jul 2026384 AMAQI

31°C24/39°C

21st Jul 2026205 AMAQI
21st Jul 2026326 AMAQI
21st Jul 2026407 AMAQI
21st Jul 2026468 AMAQI
21st Jul 2026519 AMAQI
21st Jul 20265210 AMAQI
21st Jul 20265111 AMAQI
21st Jul 20264912 PMAQI
21st Jul 2026481 PMAQI
21st Jul 2026492 PMAQI
21st Jul 2026463 PMAQI
21st Jul 2026444 PMAQI
21st Jul 2026385 PMAQI
21st Jul 2026346 PMAQI
21st Jul 2026307 PMAQI
21st Jul 2026288 PMAQI
21st Jul 2026279 PMAQI
21st Jul 20262710 PMAQI
21st Jul 20262911 PMAQI
22nd Jul 20263812 AMAQI
22nd Jul 2026381 AMAQI
22nd Jul 2026282 AMAQI
22nd Jul 2026383 AMAQI
22nd Jul 2026294 AMAQI

29°C21/37°C

22nd Jul 2026315 AMAQI
22nd Jul 2026336 AMAQI
22nd Jul 2026337 AMAQI
22nd Jul 2026368 AMAQI
22nd Jul 2026389 AMAQI
22nd Jul 20263810 AMAQI
22nd Jul 20262811 AMAQI
22nd Jul 20263212 PMAQI
22nd Jul 2026281 PMAQI
22nd Jul 2026302 PMAQI
22nd Jul 2026303 PMAQI
22nd Jul 2026304 PMAQI
22nd Jul 2026315 PMAQI
22nd Jul 2026386 PMAQI
22nd Jul 2026327 PMAQI
22nd Jul 2026298 PMAQI
22nd Jul 2026259 PMAQI
22nd Jul 20263610 PMAQI
22nd Jul 20264211 PMAQI
23rd Jul 20264212 AMAQI
23rd Jul 2026401 AMAQI
23rd Jul 2026272 AMAQI
23rd Jul 2026333 AMAQI
23rd Jul 2026294 AMAQI

25°C21/35°C

23rd Jul 2026385 AMAQI
23rd Jul 2026386 AMAQI
23rd Jul 2026197 AMAQI
23rd Jul 2026288 AMAQI
23rd Jul 2026199 AMAQI
23rd Jul 20262110 AMAQI
23rd Jul 20261711 AMAQI
23rd Jul 20262112 PMAQI
23rd Jul 2026221 PMAQI
23rd Jul 2026252 PMAQI
23rd Jul 2026253 PMAQI
23rd Jul 2026224 PMAQI
23rd Jul 2026205 PMAQI
23rd Jul 2026236 PMAQI
23rd Jul 2026217 PMAQI
23rd Jul 2026288 PMAQI
23rd Jul 2026389 PMAQI
23rd Jul 20263610 PMAQI
23rd Jul 20264211 PMAQI
24th Jul 20264012 AMAQI
24th Jul 2026301 AMAQI
24th Jul 2026382 AMAQI
24th Jul 2026383 AMAQI
24th Jul 2026384 AMAQI

26°C21/32°C

24th Jul 2026385 AMAQI
24th Jul 2026406 AMAQI
24th Jul 2026427 AMAQI
24th Jul 2026328 AMAQI
24th Jul 2026399 AMAQI
24th Jul 20264010 AMAQI
24th Jul 20264411 AMAQI
24th Jul 20264612 PMAQI
24th Jul 2026381 PMAQI
24th Jul 2026382 PMAQI
24th Jul 2026383 PMAQI
24th Jul 2026364 PMAQI
24th Jul 2026385 PMAQI
24th Jul 2026296 PMAQI
24th Jul 2026337 PMAQI
24th Jul 2026428 PMAQI
24th Jul 2026339 PMAQI
24th Jul 20263610 PMAQI
24th Jul 20263811 PMAQI
25th Jul 20263812 AMAQI
25th Jul 2026381 AMAQI
25th Jul 2026382 AMAQI
25th Jul 2026383 AMAQI
25th Jul 2026324 AMAQI

29°C22/37°C

25th Jul 2026275 AMAQI
25th Jul 2026366 AMAQI
25th Jul 2026387 AMAQI
25th Jul 2026348 AMAQI
25th Jul 2026339 AMAQI
25th Jul 20263310 AMAQI
25th Jul 20263311 AMAQI
25th Jul 20264512 PMAQI
25th Jul 2026371 PMAQI
25th Jul 2026292 PMAQI
25th Jul 2026243 PMAQI
25th Jul 2026294 PMAQI
25th Jul 2026365 PMAQI
25th Jul 2026296 PMAQI
25th Jul 2026287 PMAQI
25th Jul 2026298 PMAQI
25th Jul 2026299 PMAQI
25th Jul 20262910 PMAQI
25th Jul 20262911 PMAQI
26th Jul 20262912 AMAQI
26th Jul 2026141 AMAQI
26th Jul 2026182 AMAQI
26th Jul 2026293 AMAQI
26th Jul 2026294 AMAQI

29°C23/39°C

26th Jul 2026255 AMAQI
26th Jul 2026336 AMAQI
26th Jul 2026337 AMAQI
26th Jul 2026338 AMAQI
26th Jul 2026299 AMAQI
26th Jul 20263310 AMAQI
26th Jul 20263611 AMAQI
26th Jul 20263412 PMAQI
26th Jul 2026311 PMAQI
26th Jul 2026252 PMAQI
26th Jul 2026253 PMAQI
26th Jul 2026144 PMAQI
26th Jul 2026335 PMAQI
26th Jul 2026216 PMAQI
26th Jul 2026297 PMAQI
26th Jul 2026338 PMAQI
26th Jul 2026339 PMAQI
26th Jul 20263410 PMAQI
26th Jul 20263411 PMAQI
27th Jul 20263312 AMAQI
27th Jul 2026331 AMAQI
27th Jul 2026312 AMAQI
27th Jul 2026123 AMAQI
27th Jul 2026164 AMAQI

31°C26/39°C

27th Jul 2026145 AMAQI
27th Jul 2026196 AMAQI
27th Jul 2026227 AMAQI
27th Jul 2026308 AMAQI
27th Jul 2026299 AMAQI
27th Jul 20262910 AMAQI
27th Jul 20262911 AMAQI
27th Jul 20263412 PMAQI
27th Jul 2026291 PMAQI
27th Jul 2026362 PMAQI
27th Jul 2026343 PMAQI
27th Jul 2026364 PMAQI
27th Jul 2026345 PMAQI
27th Jul 2026466 PMAQI
27th Jul 2026287 PMAQI
27th Jul 2026328 PMAQI
27th Jul 2026299 PMAQI
27th Jul 20262910 PMAQI
27th Jul 20262711 PMAQI
28th Jul 20263812 AMAQI
28th Jul 2026461 AMAQI
28th Jul 2026482 AMAQI
28th Jul 2026503 AMAQI
28th Jul 2026464 AMAQI

27°C23/34°C

28th Jul 2026365 AMAQI
28th Jul 2026466 AMAQI
28th Jul 2026367 AMAQI
28th Jul 2026488 AMAQI
28th Jul 2026509 AMAQI
28th Jul 20265010 AMAQI
28th Jul 20263611 AMAQI
28th Jul 20263812 PMAQI
28th Jul 2026481 PMAQI
28th Jul 2026462 PMAQI
28th Jul 2026403 PMAQI
28th Jul 2026344 PMAQI
28th Jul 2026345 PMAQI
28th Jul 2026466 PMAQI
28th Jul 2026427 PMAQI
28th Jul 2026338 PMAQI
28th Jul 2026299 PMAQI
28th Jul 20262910 PMAQI
28th Jul 20262911 PMAQI
29th Jul 20263112 AMAQI
29th Jul 2026361 AMAQI
29th Jul 2026362 AMAQI
29th Jul 2026363 AMAQI
29th Jul 2026424 AMAQI

25°C22/35°C

29th Jul 2026505 AMAQI
29th Jul 2026636 AMAQI
29th Jul 2026567 AMAQI
29th Jul 2026588 AMAQI
29th Jul 2026579 AMAQI
29th Jul 20265210 AMAQI
29th Jul 20263611 AMAQI
29th Jul 20262612 PMAQI
29th Jul 2026231 PMAQI
29th Jul 2026242 PMAQI
29th Jul 2026223 PMAQI
29th Jul 2026374 PMAQI
29th Jul 2026355 PMAQI
29th Jul 2026786 PMAQI
29th Jul 2026467 PMAQI
29th Jul 2026298 PMAQI
29th Jul 2026249 PMAQI
29th Jul 20264810 PMAQI
29th Jul 20264611 PMAQI
30th Jul 20264212 AMAQI
30th Jul 2026331 AMAQI
30th Jul 2026442 AMAQI
30th Jul 2026423 AMAQI
30th Jul 2026304 AMAQI

24°C21/34°C

30th Jul 2026295 AMAQI
30th Jul 2026226 AMAQI
30th Jul 2026297 AMAQI
30th Jul 2026298 AMAQI
30th Jul 2026369 AMAQI
30th Jul 20264410 AMAQI
30th Jul 20266411 AMAQI
30th Jul 20266212 PMAQI
30th Jul 2026461 PMAQI
30th Jul 2026542 PMAQI
30th Jul 2026383 PMAQI
30th Jul 2026314 PMAQI
30th Jul 2026295 PMAQI
30th Jul 2026296 PMAQI
30th Jul 2026317 PMAQI
30th Jul 2026318 PMAQI
30th Jul 2026339 PMAQI
30th Jul 20263110 PMAQI
30th Jul 20262911 PMAQI
31st Jul 20263112 AMAQI
31st Jul 2026291 AMAQI
31st Jul 2026292 AMAQI
31st Jul 2026273 AMAQI
31st Jul 2026294 AMAQI

27°C20/35°C

31st Jul 2026295 AMAQI
31st Jul 2026296 AMAQI
31st Jul 2026297 AMAQI
31st Jul 2026488 AMAQI
31st Jul 2026419 AMAQI
31st Jul 20263810 AMAQI
31st Jul 20263311 AMAQI
31st Jul 20263812 PMAQI
31st Jul 2026381 PMAQI
31st Jul 2026362 PMAQI
31st Jul 2026313 PMAQI
31st Jul 2026334 PMAQI
31st Jul 2026365 PMAQI
31st Jul 2026346 PMAQI
31st Jul 2026347 PMAQI
31st Jul 2026388 PMAQI
31st Jul 2026389 PMAQI
31st Jul 20263610 PMAQI
31st Jul 20263611 PMAQI
1st Aug 20263812 AMAQI
1st Aug 2026381 AMAQI
1st Aug 2026382 AMAQI
1st Aug 2026383 AMAQI
1st Aug 2026384 AMAQI

25°C20/34°C

1st Aug 2026405 AMAQI
1st Aug 2026386 AMAQI
1st Aug 2026387 AMAQI
1st Aug 2026388 AMAQI
1st Aug 2026389 AMAQI
1st Aug 20263810 AMAQI
1st Aug 20263811 AMAQI
1st Aug 20264012 PMAQI
1st Aug 2026421 PMAQI
1st Aug 2026422 PMAQI
1st Aug 2026403 PMAQI
1st Aug 2026364 PMAQI
1st Aug 2026295 PMAQI
1st Aug 2026276 PMAQI
1st Aug 2026257 PMAQI
1st Aug 2026218 PMAQI
1st Aug 2026199 PMAQI
1st Aug 20261710 PMAQI
1st Aug 20262011 PMAQI
2nd Aug 20261712 AMAQI
2nd Aug 2026181 AMAQI
2nd Aug 2026292 AMAQI
2nd Aug 2026313 AMAQI
2nd Aug 2026294 AMAQI

27°C20/35°C

2nd Aug 2026295 AMAQI
2nd Aug 2026386 AMAQI
2nd Aug 2026317 AMAQI
2nd Aug 2026318 AMAQI
2nd Aug 2026319 AMAQI
2nd Aug 20262910 AMAQI
2nd Aug 20263111 AMAQI
2nd Aug 20263112 PMAQI
2nd Aug 2026311 PMAQI
2nd Aug 2026292 PMAQI
2nd Aug 2026203 PMAQI
2nd Aug 2026194 PMAQI
2nd Aug 2026405 PMAQI
2nd Aug 2026296 PMAQI
2nd Aug 2026527 PMAQI
2nd Aug 2026468 PMAQI
2nd Aug 2026449 PMAQI
2nd Aug 20263110 PMAQI
2nd Aug 20262711 PMAQI
3rd Aug 20262312 AMAQI
3rd Aug 2026271 AMAQI
3rd Aug 2026292 AMAQI
3rd Aug 2026403 AMAQI
3rd Aug 2026464 AMAQI

31°C22/39°C

3rd Aug 2026505 AMAQI
3rd Aug 2026386 AMAQI
3rd Aug 2026387 AMAQI
3rd Aug 2026568 AMAQI
3rd Aug 20261029 AMAQI
3rd Aug 20269210 AMAQI
3rd Aug 20269411 AMAQI
3rd Aug 20267612 PMAQI
3rd Aug 2026641 PMAQI
3rd Aug 2026502 PMAQI
3rd Aug 2026413 PMAQI
3rd Aug 2026504 PMAQI
3rd Aug 2026545 PMAQI
3rd Aug 2026586 PMAQI
3rd Aug 2026587 PMAQI
3rd Aug 2026828 PMAQI
3rd Aug 2026709 PMAQI
3rd Aug 20267410 PMAQI
3rd Aug 20268411 PMAQI
4th Aug 20268412 AMAQI
4th Aug 2026731 AMAQI
4th Aug 2026652 AMAQI
4th Aug 2026653 AMAQI
4th Aug 2026634 AMAQI

30°C24/38°C

4th Aug 2026725 AMAQI
4th Aug 2026756 AMAQI
4th Aug 2026687 AMAQI
4th Aug 2026608 AMAQI
4th Aug 2026609 AMAQI
4th Aug 20266010 AMAQI
4th Aug 20266511 AMAQI
4th Aug 20266212 PMAQI
4th Aug 2026621 PMAQI
4th Aug 2026692 PMAQI
4th Aug 2026653 PMAQI
4th Aug 2026714 PMAQI
4th Aug 2026725 PMAQI
4th Aug 2026666 PMAQI
4th Aug 2026697 PMAQI
4th Aug 2026728 PMAQI
4th Aug 2026689 PMAQI
4th Aug 20266710 PMAQI
4th Aug 20266511 PMAQI
5th Aug 20265812 AMAQI
5th Aug 2026551 AMAQI
5th Aug 2026512 AMAQI
5th Aug 2026523 AMAQI
5th Aug 2026524 AMAQI

21°C14/26°C

5th Aug 2026535 AMAQI
5th Aug 2026526 AMAQI
5th Aug 2026537 AMAQI
5th Aug 2026538 AMAQI
5th Aug 2026549 AMAQI
5th Aug 20265610 AMAQI
5th Aug 20265511 AMAQI
5th Aug 20265612 PMAQI
5th Aug 2026581 PMAQI
5th Aug 2026622 PMAQI
5th Aug 2026633 PMAQI
5th Aug 2026564 PMAQI
5th Aug 2026595 PMAQI
5th Aug 2026586 PMAQI
5th Aug 2026587 PMAQI
5th Aug 2026598 PMAQI
5th Aug 2026579 PMAQI
5th Aug 20265510 PMAQI
5th Aug 20265411 PMAQI
6th Aug 20265212 AMAQI
6th Aug 2026531 AMAQI
6th Aug 2026542 AMAQI
6th Aug 2026553 AMAQI
6th Aug 2026554 AMAQI

22°C13/30°C

6th Aug 2026525 AMAQI
6th Aug 2026526 AMAQI
6th Aug 2026587 AMAQI
6th Aug 2026728 AMAQI
6th Aug 2026929 AMAQI
6th Aug 20268810 AMAQI
6th Aug 20267811 AMAQI
6th Aug 20268712 PMAQI
6th Aug 2026811 PMAQI
6th Aug 2026692 PMAQI
6th Aug 2026593 PMAQI
6th Aug 2026564 PMAQI
6th Aug 2026555 PMAQI
6th Aug 2026526 PMAQI
6th Aug 2026537 PMAQI
6th Aug 2026548 PMAQI
6th Aug 2026549 PMAQI
6th Aug 20265310 PMAQI
6th Aug 20265611 PMAQI
7th Aug 20265512 AMAQI
7th Aug 2026601 AMAQI
7th Aug 2026572 AMAQI
7th Aug 2026593 AMAQI
7th Aug 2026574 AMAQI

27°C18/37°C

7th Aug 2026565 AMAQI
7th Aug 2026606 AMAQI
7th Aug 2026577 AMAQI
7th Aug 2026598 AMAQI
7th Aug 2026949 AMAQI
7th Aug 20268710 AMAQI
7th Aug 20267211 AMAQI
7th Aug 20267012 PMAQI
7th Aug 2026591 PMAQI
7th Aug 2026602 PMAQI
7th Aug 2026593 PMAQI
7th Aug 2026584 PMAQI
7th Aug 2026585 PMAQI
7th Aug 2026606 PMAQI
7th Aug 2026587 PMAQI
7th Aug 2026588 PMAQI
7th Aug 2026589 PMAQI
7th Aug 20265910 PMAQI
7th Aug 20265711 PMAQI
8th Aug 20265912 AMAQI
8th Aug 2026601 AMAQI
8th Aug 2026572 AMAQI
8th Aug 2026603 AMAQI
8th Aug 2026604 AMAQI

29°C21/36°C

8th Aug 2026605 AMAQI
8th Aug 2026626 AMAQI
8th Aug 2026607 AMAQI
8th Aug 2026648 AMAQI
8th Aug 2026909 AMAQI
8th Aug 20268610 AMAQI
8th Aug 20267511 AMAQI
8th Aug 20266612 PMAQI
8th Aug 2026561 PMAQI
8th Aug 2026532 PMAQI
8th Aug 2026523 PMAQI
8th Aug 2026524 PMAQI
8th Aug 2026615 PMAQI
8th Aug 2026586 PMAQI
8th Aug 2026587 PMAQI
8th Aug 2026508 PMAQI
8th Aug 2026409 PMAQI
8th Aug 20264210 PMAQI
8th Aug 20264011 PMAQI
9th Aug 20263612 AMAQI
9th Aug 2026401 AMAQI
9th Aug 2026362 AMAQI
9th Aug 2026383 AMAQI
9th Aug 2026364 AMAQI

30°C22/38°C

9th Aug 2026365 AMAQI
9th Aug 2026406 AMAQI
9th Aug 2026367 AMAQI
9th Aug 2026388 AMAQI
9th Aug 2026389 AMAQI
9th Aug 20263810 AMAQI
9th Aug 20263611 AMAQI
9th Aug 20263812 PMAQI
9th Aug 2026381 PMAQI
9th Aug 2026362 PMAQI
9th Aug 2026423 PMAQI
9th Aug 2026384 PMAQI
9th Aug 2026445 PMAQI
9th Aug 2026406 PMAQI
9th Aug 2026387 PMAQI
9th Aug 2026408 PMAQI
9th Aug 2026389 PMAQI
9th Aug 20264010 PMAQI
9th Aug 20264011 PMAQI
10th Aug 20264612 AMAQI
10th Aug 2026481 AMAQI
10th Aug 2026482 AMAQI
10th Aug 2026463 AMAQI
10th Aug 2026484 AMAQI

30°C23/38°C

10th Aug 2026485 AMAQI
10th Aug 2026486 AMAQI
10th Aug 2026517 AMAQI
10th Aug 2026748 AMAQI
10th Aug 2026929 AMAQI
10th Aug 20268410 AMAQI
10th Aug 20268311 AMAQI
10th Aug 20267312 PMAQI
10th Aug 2026681 PMAQI
10th Aug 2026542 PMAQI
10th Aug 2026503 PMAQI
10th Aug 2026504 PMAQI
10th Aug 2026485 PMAQI
10th Aug 2026466 PMAQI
10th Aug 2026427 PMAQI
10th Aug 2026388 PMAQI
10th Aug 2026429 PMAQI
10th Aug 20263810 PMAQI
10th Aug 20265811 PMAQI
11th Aug 20264912 AMAQI
11th Aug 2026431 AMAQI
11th Aug 2026362 AMAQI
11th Aug 2026293 AMAQI
11th Aug 2026294 AMAQI

28°C24/36°C

11th Aug 2026315 AMAQI
11th Aug 2026366 AMAQI
11th Aug 2026317 AMAQI
11th Aug 2026468 AMAQI
11th Aug 2026709 AMAQI
11th Aug 20267610 AMAQI
11th Aug 20267611 AMAQI
11th Aug 20266012 PMAQI
11th Aug 2026541 PMAQI
11th Aug 2026422 PMAQI
11th Aug 2026403 PMAQI
11th Aug 2026424 PMAQI
11th Aug 2026385 PMAQI
11th Aug 2026386 PMAQI
11th Aug 2026447 PMAQI
11th Aug 2026408 PMAQI
11th Aug 2026299 PMAQI
11th Aug 20263010 PMAQI
11th Aug 20262711 PMAQI
12th Aug 20262912 AMAQI
12th Aug 2026291 AMAQI
12th Aug 2026312 AMAQI
12th Aug 2026313 AMAQI
12th Aug 2026314 AMAQI

29°C23/36°C

12th Aug 2026295 AMAQI
12th Aug 2026296 AMAQI
12th Aug 2026317 AMAQI
12th Aug 2026648 AMAQI
12th Aug 2026949 AMAQI
12th Aug 20269610 AMAQI
12th Aug 20266611 AMAQI
12th Aug 20265212 PMAQI
12th Aug 2026421 PMAQI
12th Aug 2026382 PMAQI
12th Aug 2026403 PMAQI
12th Aug 2026384 PMAQI
12th Aug 2026465 PMAQI
12th Aug 2026366 PMAQI
12th Aug 2026387 PMAQI
12th Aug 2026368 PMAQI
12th Aug 2026299 PMAQI
12th Aug 20262410 PMAQI
12th Aug 20262311 PMAQI
13th Aug 20263812 AMAQI
13th Aug 2026381 AMAQI
13th Aug 2026362 AMAQI
13th Aug 2026333 AMAQI
13th Aug 2026294 AMAQI

26°C21/35°C

13th Aug 2026315 AMAQI
5 AM
13th Aug 2026346 AMAQI
13th Aug 2026347 AMAQI
13th Aug 2026348 AMAQI
13th Aug 2026409 AMAQI
13th Aug 20263810 AMAQI
13th Aug 20262711 AMAQI
13th Aug 20262912 PMAQI
12 PM
13th Aug 2026291 PMAQI
13th Aug 2026292 PMAQI
13th Aug 2026313 PMAQI
13th Aug 2026294 PMAQI
13th Aug 2026315 PMAQI
13th Aug 2026326 PMAQI
13th Aug 2026317 PMAQI
13th Aug 2026318 PMAQI
8 PM
13th Aug 2026299 PMAQI
13th Aug 20262910 PMAQI
13th Aug 20263611 PMAQI
12 AM
4 AM

21°C18/28°C

Day time
Avg. Highest Time
9 AM - 10 AM

51AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
5 AM

36AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 10 AM (Avg. 51), while the lowest AQI was between 5 AM to 5 AM (Avg. 36).
Night time
Avg. Highest Time
12 AM - 11 PM

38AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM

38AQI

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. 38), while the lowest AQI was between 12 AM to 11 PM (Avg. 38).

2026 Days Vs Air Quality

Welby, Colorado, United States

2026

95%

210

5%

12

Total number of days with different AQI categories in last 225 days in 2026 (140 days remaining)

Good
210 Days
Moderate
12 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 95%

Health Risk Level:

Very Low

In 2026, 95% of 225 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

Welby, 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
22AQI (US)
2nd January 2026
23AQI (US)
3rd January 2026
32AQI (US)
4th January 2026
16AQI (US)
5th January 2026
42AQI (US)
6th January 2026
19AQI (US)
7th January 2026
43AQI (US)
8th January 2026
18AQI (US)
9th January 2026
25AQI (US)
10th January 2026
22AQI (US)
11th January 2026
18AQI (US)
12th January 2026
28AQI (US)
13th January 2026
25AQI (US)
14th January 2026
21AQI (US)
15th January 2026
28AQI (US)
16th January 2026
28AQI (US)
17th January 2026
14AQI (US)
18th January 2026
15AQI (US)
19th January 2026
19AQI (US)
20th January 2026
27AQI (US)
21st January 2026
26AQI (US)
22nd January 2026
32AQI (US)
23rd January 2026
26AQI (US)
24th January 2026
31AQI (US)
25th January 2026
23AQI (US)
26th January 2026
20AQI (US)
27th January 2026
23AQI (US)
28th January 2026
39AQI (US)
29th January 2026
38AQI (US)
30th January 2026
38AQI (US)
31st January 2026
26AQI (US)
1st February 2026
24AQI (US)
2nd February 2026
48AQI (US)
3rd February 2026
38AQI (US)
4th February 2026
28AQI (US)
5th February 2026
38AQI (US)
6th February 2026
31AQI (US)
7th February 2026
32AQI (US)
8th February 2026
21AQI (US)
9th February 2026
30AQI (US)
10th February 2026
25AQI (US)
11th February 2026
39AQI (US)
12th February 2026
37AQI (US)
13th February 2026
36AQI (US)
14th February 2026
24AQI (US)
15th February 2026
24AQI (US)
16th February 2026
36AQI (US)
17th February 2026
39AQI (US)
18th February 2026
21AQI (US)
19th February 2026
27AQI (US)
20th February 2026
21AQI (US)
21st February 2026
20AQI (US)
22nd February 2026
22AQI (US)
23rd February 2026
40AQI (US)
24th February 2026
38AQI (US)
25th February 2026
33AQI (US)
26th February 2026
20AQI (US)
27th February 2026
28AQI (US)
28th February 2026
19AQI (US)
1st March 2026
24AQI (US)
2nd March 2026
35AQI (US)
3rd March 2026
25AQI (US)
4th March 2026
21AQI (US)
5th March 2026
31AQI (US)
6th March 2026
29AQI (US)
7th March 2026
24AQI (US)
8th March 2026
24AQI (US)
9th March 2026
22AQI (US)
10th March 2026
31AQI (US)
11th March 2026
19AQI (US)
12th March 2026
26AQI (US)
13th March 2026
28AQI (US)
14th March 2026
24AQI (US)
15th March 2026
20AQI (US)
16th March 2026
23AQI (US)
17th March 2026
21AQI (US)
18th March 2026
27AQI (US)
19th March 2026
33AQI (US)
20th March 2026
39AQI (US)
21st March 2026
25AQI (US)
22nd March 2026
29AQI (US)
23rd March 2026
31AQI (US)
24th March 2026
37AQI (US)
25th March 2026
36AQI (US)
26th March 2026
62AQI (US)
27th March 2026
24AQI (US)
28th March 2026
32AQI (US)
29th March 2026
27AQI (US)
30th March 2026
37AQI (US)
31st March 2026
38AQI (US)
1st April 2026
36AQI (US)
2nd April 2026
20AQI (US)
3rd April 2026
36AQI (US)
4th April 2026
17AQI (US)
5th April 2026
23AQI (US)
6th April 2026
25AQI (US)
7th April 2026
30AQI (US)
8th April 2026
34AQI (US)
9th April 2026
36AQI (US)
10th April 2026
43AQI (US)
11th April 2026
33AQI (US)
12th April 2026
16AQI (US)
13th April 2026
24AQI (US)
14th April 2026
27AQI (US)
15th April 2026
26AQI (US)
16th April 2026
29AQI (US)
17th April 2026
18th April 2026
20AQI (US)
19th April 2026
21AQI (US)
20th April 2026
36AQI (US)
21st April 2026
35AQI (US)
22nd April 2026
23rd April 2026
40AQI (US)
24th April 2026
23AQI (US)
25th April 2026
25AQI (US)
26th April 2026
19AQI (US)
27th April 2026
17AQI (US)
28th April 2026
19AQI (US)
29th April 2026
18AQI (US)
30th April 2026
18AQI (US)
1st May 2026
22AQI (US)
2nd May 2026
13AQI (US)
3rd May 2026
13AQI (US)
4th May 2026
22AQI (US)
5th May 2026
27AQI (US)
6th May 2026
22AQI (US)
7th May 2026
17AQI (US)
8th May 2026
19AQI (US)
9th May 2026
10th May 2026
25AQI (US)
11th May 2026
22AQI (US)
12th May 2026
33AQI (US)
13th May 2026
53AQI (US)
14th May 2026
41AQI (US)
15th May 2026
37AQI (US)
16th May 2026
29AQI (US)
17th May 2026
20AQI (US)
18th May 2026
34AQI (US)
19th May 2026
29AQI (US)
20th May 2026
19AQI (US)
21st May 2026
23AQI (US)
22nd May 2026
20AQI (US)
23rd May 2026
21AQI (US)
24th May 2026
26AQI (US)
25th May 2026
24AQI (US)
26th May 2026
28AQI (US)
27th May 2026
19AQI (US)
28th May 2026
23AQI (US)
29th May 2026
28AQI (US)
30th May 2026
21AQI (US)
31st May 2026
15AQI (US)
1st June 2026
20AQI (US)
2nd June 2026
20AQI (US)
3rd June 2026
33AQI (US)
4th June 2026
35AQI (US)
5th June 2026
34AQI (US)
6th June 2026
34AQI (US)
7th June 2026
27AQI (US)
8th June 2026
35AQI (US)
9th June 2026
28AQI (US)
10th June 2026
34AQI (US)
11th June 2026
34AQI (US)
12th June 2026
38AQI (US)
13th June 2026
33AQI (US)
14th June 2026
19AQI (US)
15th June 2026
32AQI (US)
16th June 2026
39AQI (US)
17th June 2026
45AQI (US)
18th June 2026
42AQI (US)
19th June 2026
52AQI (US)
20th June 2026
49AQI (US)
21st June 2026
35AQI (US)
22nd June 2026
32AQI (US)
23rd June 2026
44AQI (US)
24th June 2026
32AQI (US)
25th June 2026
27AQI (US)
26th June 2026
21AQI (US)
27th June 2026
20AQI (US)
28th June 2026
41AQI (US)
29th June 2026
32AQI (US)
30th June 2026
50AQI (US)
1st July 2026
46AQI (US)
2nd July 2026
42AQI (US)
3rd July 2026
41AQI (US)
4th July 2026
35AQI (US)
5th July 2026
44AQI (US)
6th July 2026
55AQI (US)
7th July 2026
59AQI (US)
8th July 2026
43AQI (US)
9th July 2026
23AQI (US)
10th July 2026
29AQI (US)
11th July 2026
20AQI (US)
12th July 2026
18AQI (US)
13th July 2026
29AQI (US)
14th July 2026
35AQI (US)
15th July 2026
28AQI (US)
16th July 2026
28AQI (US)
17th July 2026
30AQI (US)
18th July 2026
37AQI (US)
19th July 2026
32AQI (US)
20th July 2026
39AQI (US)
21st July 2026
40AQI (US)
22nd July 2026
33AQI (US)
23rd July 2026
28AQI (US)
24th July 2026
38AQI (US)
25th July 2026
33AQI (US)
26th July 2026
29AQI (US)
27th July 2026
29AQI (US)
28th July 2026
41AQI (US)
29th July 2026
41AQI (US)
30th July 2026
37AQI (US)
31st July 2026
34AQI (US)
1st August 2026
34AQI (US)
2nd August 2026
31AQI (US)
3rd August 2026
58AQI (US)
4th August 2026
67AQI (US)
5th August 2026
56AQI (US)
6th August 2026
62AQI (US)
7th August 2026
62AQI (US)
8th August 2026
59AQI (US)
9th August 2026
38AQI (US)
10th August 2026
55AQI (US)
11th August 2026
43AQI (US)
12th August 2026
42AQI (US)
13th August 2026
32AQI (US)
14th August 2026
15th August 2026
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

26AQI (US)

30AQI (US)

29AQI (US)

27AQI (US)

25AQI (US)

34AQI (US)

35AQI (US)

49AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202631AQI (US)

31
28
30
1
28
29
1
29
1
29
2
6
7
210
12

Highest AQI (US) recorded in

August

49AQI (US)

Lowest AQI (US) recorded in

May

25AQI (US)

202535AQI (US)

26
5
26
2
31
29
1
31
29
1
27
4
22
9
25
5
20
11
30
30
1
326
39

Highest AQI (US) recorded in

October

46AQI (US)

Lowest AQI (US) recorded in

May

24AQI (US)

202456AQI (US)

31
29
31
30
31
30
31
26
5
23
4
17
14
26
4
26
5
118
245

Highest AQI (US) recorded in

June

70AQI (US)

Lowest AQI (US) recorded in

November

28AQI (US)

202366AQI (US)

31
28
31
30
31
30
31
31
30
31
1
27
13
18
14
349

Highest AQI (US) recorded in

July

70AQI (US)

Lowest AQI (US) recorded in

December

40AQI (US)

202270AQI (US)

30
22
31
17
30
29
20
3
29
31
30
29
301

Highest AQI (US) recorded in

April

73AQI (US)

Lowest AQI (US) recorded in

November

68AQI (US)

202154AQI (US)

30
28
30
1
30
9
17
27
31
31
24
31
30
31
127
223

Highest AQI (US) recorded in

June

71AQI (US)

Lowest AQI (US) recorded in

February

22AQI (US)

202040AQI (US)

13
19
1
19
26
4
24
7
13
18
13
16
1
18
13
27
2
29
2
201
63
1

Highest AQI (US) recorded in

August

57AQI (US)

Lowest AQI (US) recorded in

December

25AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2022(Avg.)
70AQI (US)
Least Polluted Year Recorded
2026(Avg.)
31AQI (US)

Welby's annual 2026 AQI (US) (31) shows an average percentage change of -38.3% (improved AQI (US)) compared to previous years: 2020 (40), 2021 (54), 2022 (70), 2023 (66), 2024 (56), 2025 (35).