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+
November Air Quality Analysis
Welby, Colorado, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
22nd Nov 2021
91AQILowest AQI recorded on
30th Nov 2023
6AQISame Day Analysis (2nd November ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 31 of Good air quality, showing improvement over 2023, 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Nov - 3rd Nov 2025
Welby, Colorado, United States
AQI
Day
Night
.
7 AM2nd Nov 2025
6 PM
6 AM3rd Nov 2025
Day time
Avg. Highest Time
7AM2nd Nov
37AQI
Avg. Lowest Time
1PM2nd Nov
20AQI
Night time
Avg. Highest Time
1AM3rd Nov
52AQI
Avg. Lowest Time
9PM2nd Nov
14AQI
In the last 24 hours,
Welby's AQI reached its highest point of 52 at 1 AM during the Night, while the lowest point, 14, was recorded at 9 PM during the Night between 2nd Nov and 3rd Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
Welby, Colorado, United States
OctNov
04th - 05th05th - 06th06th - 07th07th - 08th08th - 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
Day
Night
4th Oct 2025397 AMAQI
4th Oct 2025218 AMAQI
4th Oct 2025319 AMAQI
4th Oct 20254210 AMAQI
4th Oct 20253811 AMAQI
4th Oct 20254612 PMAQI
4th Oct 2025401 PMAQI
4th Oct 2025372 PMAQI
4th Oct 2025563 PMAQI
4th Oct 2025584 PMAQI
4th Oct 2025545 PMAQI
4th Oct 2025436 PMAQI
4th Oct 2025557 PMAQI
4th Oct 2025308 PMAQI
4th Oct 2025339 PMAQI
4th Oct 20253610 PMAQI
4th Oct 20253411 PMAQI
5th Oct 20253912 AMAQI
5th Oct 2025411 AMAQI
5th Oct 2025432 AMAQI
5th Oct 2025263 AMAQI
5th Oct 2025344 AMAQI
5th Oct 2025345 AMAQI
5th Oct 2025416 AMAQI
22°C15/30°C
5th Oct 2025397 AMAQI
5th Oct 2025388 AMAQI
5th Oct 2025399 AMAQI
5th Oct 20254210 AMAQI
5th Oct 20254511 AMAQI
5th Oct 20254712 PMAQI
5th Oct 2025521 PMAQI
5th Oct 2025532 PMAQI
5th Oct 2025453 PMAQI
5th Oct 2025224 PMAQI
5th Oct 2025185 PMAQI
5th Oct 2025196 PMAQI
5th Oct 2025207 PMAQI
5th Oct 2025348 PMAQI
5th Oct 2025199 PMAQI
5th Oct 20251310 PMAQI
5th Oct 20252911 PMAQI
6th Oct 20253612 AMAQI
6th Oct 2025351 AMAQI
6th Oct 2025332 AMAQI
6th Oct 2025123 AMAQI
6th Oct 202584 AMAQI
6th Oct 2025115 AMAQI
6th Oct 2025136 AMAQI
13°C9/19°C
6th Oct 2025117 AMAQI
6th Oct 2025128 AMAQI
6th Oct 2025329 AMAQI
6th Oct 20254610 AMAQI
6th Oct 20254311 AMAQI
7th Oct 2025425 AMAQI
7th Oct 2025506 AMAQI
9°C7/11°C
7th Oct 2025547 AMAQI
7th Oct 2025648 AMAQI
7th Oct 2025659 AMAQI
7th Oct 20255810 AMAQI
7th Oct 20255511 AMAQI
7th Oct 20255512 PMAQI
7th Oct 2025501 PMAQI
7th Oct 2025572 PMAQI
7th Oct 2025623 PMAQI
7th Oct 2025634 PMAQI
7th Oct 2025645 PMAQI
7th Oct 2025646 PMAQI
7th Oct 2025637 PMAQI
7th Oct 2025668 PMAQI
7th Oct 2025689 PMAQI
7th Oct 20256810 PMAQI
7th Oct 20257111 PMAQI
8th Oct 20257212 AMAQI
8th Oct 2025721 AMAQI
8th Oct 2025722 AMAQI
8th Oct 2025693 AMAQI
8th Oct 2025754 AMAQI
8th Oct 2025715 AMAQI
8th Oct 2025746 AMAQI
12°C6/17°C
8th Oct 2025757 AMAQI
8th Oct 2025708 AMAQI
8th Oct 2025689 AMAQI
8th Oct 20256910 AMAQI
8th Oct 20257911 AMAQI
8th Oct 20258812 PMAQI
8th Oct 2025821 PMAQI
8th Oct 2025762 PMAQI
8th Oct 2025773 PMAQI
8th Oct 2025694 PMAQI
8th Oct 2025635 PMAQI
8th Oct 2025566 PMAQI
8th Oct 2025447 PMAQI
8th Oct 2025448 PMAQI
8th Oct 2025579 PMAQI
8th Oct 20256310 PMAQI
8th Oct 20256611 PMAQI
9th Oct 20256712 AMAQI
9th Oct 2025701 AMAQI
9th Oct 2025712 AMAQI
9th Oct 2025493 AMAQI
9th Oct 2025584 AMAQI
9th Oct 2025555 AMAQI
9th Oct 2025516 AMAQI
17°C5/27°C
9th Oct 2025537 AMAQI
9th Oct 2025548 AMAQI
9th Oct 2025549 AMAQI
9th Oct 20256910 AMAQI
9th Oct 20256311 AMAQI
9th Oct 20255812 PMAQI
9th Oct 2025561 PMAQI
9th Oct 2025522 PMAQI
9th Oct 2025573 PMAQI
9th Oct 2025484 PMAQI
9th Oct 2025485 PMAQI
9th Oct 2025416 PMAQI
9th Oct 2025407 PMAQI
9th Oct 2025508 PMAQI
9th Oct 2025599 PMAQI
9th Oct 20255810 PMAQI
9th Oct 20255211 PMAQI
10th Oct 20255112 AMAQI
10th Oct 2025491 AMAQI
10th Oct 2025502 AMAQI
10th Oct 2025463 AMAQI
10th Oct 2025564 AMAQI
10th Oct 2025565 AMAQI
10th Oct 2025556 AMAQI
19°C9/30°C
10th Oct 2025537 AMAQI
10th Oct 2025558 AMAQI
10th Oct 2025709 AMAQI
10th Oct 20258010 AMAQI
10th Oct 20256311 AMAQI
10th Oct 20255612 PMAQI
10th Oct 2025541 PMAQI
10th Oct 2025562 PMAQI
10th Oct 2025573 PMAQI
10th Oct 2025574 PMAQI
10th Oct 2025565 PMAQI
10th Oct 2025576 PMAQI
10th Oct 2025577 PMAQI
10th Oct 2025598 PMAQI
10th Oct 2025569 PMAQI
10th Oct 20255510 PMAQI
10th Oct 20255711 PMAQI
11th Oct 20255812 AMAQI
11th Oct 2025591 AMAQI
11th Oct 2025612 AMAQI
11th Oct 2025623 AMAQI
11th Oct 2025634 AMAQI
11th Oct 2025655 AMAQI
11th Oct 2025696 AMAQI
15°C13/19°C
11th Oct 2025697 AMAQI
11th Oct 2025628 AMAQI
11th Oct 2025619 AMAQI
11th Oct 20256110 AMAQI
11th Oct 20256411 AMAQI
11th Oct 20256812 PMAQI
11th Oct 2025681 PMAQI
11th Oct 2025702 PMAQI
11th Oct 2025683 PMAQI
11th Oct 2025604 PMAQI
11th Oct 2025605 PMAQI
11th Oct 2025596 PMAQI
11th Oct 2025537 PMAQI
11th Oct 2025588 PMAQI
11th Oct 2025589 PMAQI
11th Oct 20256210 PMAQI
11th Oct 20256811 PMAQI
12th Oct 20257112 AMAQI
12th Oct 2025721 AMAQI
12th Oct 2025652 AMAQI
12th Oct 2025653 AMAQI
12th Oct 2025634 AMAQI
12th Oct 2025605 AMAQI
12th Oct 2025546 AMAQI
15°C13/19°C
12th Oct 2025477 AMAQI
12th Oct 2025408 AMAQI
12th Oct 2025509 AMAQI
12th Oct 20255210 AMAQI
12th Oct 20254011 AMAQI
12th Oct 20252212 PMAQI
12th Oct 2025171 PMAQI
12th Oct 2025142 PMAQI
12th Oct 2025183 PMAQI
12th Oct 2025194 PMAQI
12th Oct 2025175 PMAQI
12th Oct 2025146 PMAQI
12th Oct 2025207 PMAQI
12th Oct 2025158 PMAQI
12th Oct 2025389 PMAQI
12th Oct 20254410 PMAQI
12th Oct 20254211 PMAQI
13th Oct 20253512 AMAQI
13th Oct 2025361 AMAQI
13th Oct 2025152 AMAQI
13th Oct 2025153 AMAQI
13th Oct 2025194 AMAQI
13th Oct 2025355 AMAQI
13th Oct 2025366 AMAQI
16°C11/23°C
13th Oct 2025207 AMAQI
13th Oct 2025228 AMAQI
13th Oct 2025189 AMAQI
13th Oct 20253310 AMAQI
13th Oct 20254511 AMAQI
13th Oct 20254512 PMAQI
13th Oct 2025391 PMAQI
13th Oct 2025332 PMAQI
13th Oct 2025273 PMAQI
13th Oct 2025244 PMAQI
13th Oct 2025265 PMAQI
13th Oct 2025236 PMAQI
13th Oct 2025347 PMAQI
13th Oct 2025368 PMAQI
13th Oct 2025379 PMAQI
13th Oct 20253410 PMAQI
13th Oct 20253911 PMAQI
14th Oct 20254812 AMAQI
14th Oct 2025421 AMAQI
14th Oct 2025422 AMAQI
14th Oct 2025423 AMAQI
14th Oct 2025434 AMAQI
14th Oct 2025365 AMAQI
14th Oct 2025406 AMAQI
11°C6/17°C
14th Oct 2025427 AMAQI
14th Oct 2025468 AMAQI
14th Oct 2025479 AMAQI
14th Oct 20256110 AMAQI
14th Oct 20255311 AMAQI
14th Oct 20254412 PMAQI
14th Oct 2025461 PMAQI
14th Oct 2025472 PMAQI
14th Oct 2025543 PMAQI
14th Oct 2025554 PMAQI
14th Oct 2025545 PMAQI
14th Oct 2025546 PMAQI
14th Oct 2025577 PMAQI
14th Oct 2025568 PMAQI
14th Oct 2025569 PMAQI
14th Oct 20255810 PMAQI
14th Oct 20255811 PMAQI
15th Oct 20256412 AMAQI
15th Oct 2025651 AMAQI
15th Oct 2025602 AMAQI
15th Oct 2025583 AMAQI
15th Oct 2025554 AMAQI
15th Oct 2025565 AMAQI
15th Oct 2025596 AMAQI
14°C6/25°C
15th Oct 2025567 AMAQI
15th Oct 2025588 AMAQI
15th Oct 2025719 AMAQI
15th Oct 20259610 AMAQI
15th Oct 20258511 AMAQI
15th Oct 20258512 PMAQI
15th Oct 2025701 PMAQI
15th Oct 2025622 PMAQI
15th Oct 2025573 PMAQI
15th Oct 2025574 PMAQI
15th Oct 2025585 PMAQI
15th Oct 2025636 PMAQI
15th Oct 2025647 PMAQI
15th Oct 2025708 PMAQI
15th Oct 2025729 PMAQI
15th Oct 20256810 PMAQI
15th Oct 20256811 PMAQI
16th Oct 20255912 AMAQI
16th Oct 2025531 AMAQI
16th Oct 2025452 AMAQI
16th Oct 2025433 AMAQI
16th Oct 2025344 AMAQI
16th Oct 2025205 AMAQI
16th Oct 2025316 AMAQI
18°C10/28°C
16th Oct 2025427 AMAQI
16th Oct 2025398 AMAQI
16th Oct 2025449 AMAQI
16th Oct 20255110 AMAQI
16th Oct 20254711 AMAQI
16th Oct 20254512 PMAQI
16th Oct 2025481 PMAQI
16th Oct 2025522 PMAQI
16th Oct 2025483 PMAQI
16th Oct 2025494 PMAQI
16th Oct 2025405 PMAQI
16th Oct 2025396 PMAQI
16th Oct 2025397 PMAQI
16th Oct 2025408 PMAQI
16th Oct 2025469 PMAQI
16th Oct 20254310 PMAQI
16th Oct 20254411 PMAQI
17th Oct 20254712 AMAQI
17th Oct 2025491 AMAQI
17th Oct 2025342 AMAQI
17th Oct 2025363 AMAQI
17th Oct 2025434 AMAQI
17th Oct 2025515 AMAQI
17th Oct 2025386 AMAQI
15°C11/23°C
17th Oct 2025387 AMAQI
17th Oct 2025448 AMAQI
17th Oct 2025519 AMAQI
17th Oct 20256110 AMAQI
17th Oct 20256211 AMAQI
17th Oct 20256612 PMAQI
17th Oct 2025471 PMAQI
17th Oct 2025242 PMAQI
17th Oct 2025353 PMAQI
17th Oct 2025244 PMAQI
17th Oct 2025295 PMAQI
17th Oct 2025226 PMAQI
17th Oct 2025237 PMAQI
17th Oct 2025388 PMAQI
17th Oct 2025469 PMAQI
17th Oct 20254710 PMAQI
17th Oct 20255411 PMAQI
18th Oct 20255412 AMAQI
18th Oct 2025541 AMAQI
18th Oct 2025572 AMAQI
18th Oct 2025563 AMAQI
18th Oct 2025454 AMAQI
18th Oct 2025415 AMAQI
18th Oct 2025356 AMAQI
12°C6/20°C
18th Oct 2025367 AMAQI
18th Oct 2025398 AMAQI
18th Oct 2025439 AMAQI
18th Oct 20255010 AMAQI
18th Oct 20255811 AMAQI
18th Oct 20255412 PMAQI
18th Oct 2025641 PMAQI
18th Oct 2025762 PMAQI
18th Oct 2025643 PMAQI
18th Oct 2025544 PMAQI
18th Oct 2025485 PMAQI
18th Oct 2025476 PMAQI
18th Oct 2025457 PMAQI
18th Oct 2025458 PMAQI
18th Oct 2025489 PMAQI
18th Oct 20255010 PMAQI
18th Oct 20255211 PMAQI
19th Oct 20255412 AMAQI
19th Oct 2025541 AMAQI
19th Oct 2025542 AMAQI
19th Oct 2025343 AMAQI
19th Oct 2025494 AMAQI
19th Oct 2025445 AMAQI
19th Oct 2025496 AMAQI
11°C6/19°C
19th Oct 2025497 AMAQI
19th Oct 2025528 AMAQI
19th Oct 2025549 AMAQI
19th Oct 20255510 AMAQI
19th Oct 20253611 AMAQI
19th Oct 20255212 PMAQI
19th Oct 2025351 PMAQI
19th Oct 2025342 PMAQI
19th Oct 2025213 PMAQI
19th Oct 2025214 PMAQI
19th Oct 2025225 PMAQI
19th Oct 2025156 PMAQI
19th Oct 2025207 PMAQI
19th Oct 2025248 PMAQI
19th Oct 2025329 PMAQI
19th Oct 20253610 PMAQI
19th Oct 20253711 PMAQI
20th Oct 20254612 AMAQI
20th Oct 2025561 AMAQI
20th Oct 2025442 AMAQI
20th Oct 2025183 AMAQI
20th Oct 2025134 AMAQI
20th Oct 2025155 AMAQI
20th Oct 2025196 AMAQI
14°C4/26°C
20th Oct 2025317 AMAQI
20th Oct 2025428 AMAQI
20th Oct 2025459 AMAQI
20th Oct 20255310 AMAQI
20th Oct 20256511 AMAQI
20th Oct 20256312 PMAQI
20th Oct 2025531 PMAQI
20th Oct 2025342 PMAQI
20th Oct 2025273 PMAQI
20th Oct 2025314 PMAQI
20th Oct 2025175 PMAQI
20th Oct 2025206 PMAQI
20th Oct 2025207 PMAQI
20th Oct 2025258 PMAQI
20th Oct 2025189 PMAQI
20th Oct 20252110 PMAQI
20th Oct 20252211 PMAQI
21st Oct 20252612 AMAQI
21st Oct 2025321 AMAQI
21st Oct 2025292 AMAQI
21st Oct 2025273 AMAQI
21st Oct 2025234 AMAQI
21st Oct 2025225 AMAQI
21st Oct 2025196 AMAQI
12°C8/18°C
21st Oct 2025227 AMAQI
21st Oct 2025378 AMAQI
21st Oct 2025379 AMAQI
21st Oct 20254410 AMAQI
21st Oct 20255111 AMAQI
21st Oct 20255412 PMAQI
21st Oct 2025541 PMAQI
21st Oct 2025542 PMAQI
21st Oct 2025543 PMAQI
21st Oct 2025524 PMAQI
21st Oct 2025485 PMAQI
21st Oct 2025416 PMAQI
21st Oct 2025407 PMAQI
21st Oct 2025448 PMAQI
21st Oct 2025459 PMAQI
21st Oct 20253810 PMAQI
21st Oct 20253111 PMAQI
22nd Oct 20253512 AMAQI
22nd Oct 2025421 AMAQI
22nd Oct 2025402 AMAQI
22nd Oct 2025463 AMAQI
22nd Oct 2025504 AMAQI
22nd Oct 2025505 AMAQI
22nd Oct 2025466 AMAQI
11°C3/21°C
22nd Oct 2025497 AMAQI
22nd Oct 2025548 AMAQI
22nd Oct 2025599 AMAQI
22nd Oct 20256010 AMAQI
22nd Oct 20255611 AMAQI
22nd Oct 20254812 PMAQI
22nd Oct 2025381 PMAQI
22nd Oct 2025312 PMAQI
22nd Oct 2025313 PMAQI
22nd Oct 2025284 PMAQI
22nd Oct 2025265 PMAQI
22nd Oct 2025296 PMAQI
22nd Oct 2025347 PMAQI
22nd Oct 2025368 PMAQI
22nd Oct 2025369 PMAQI
22nd Oct 20254210 PMAQI
22nd Oct 20254811 PMAQI
23rd Oct 20254912 AMAQI
23rd Oct 2025561 AMAQI
23rd Oct 2025522 AMAQI
23rd Oct 2025523 AMAQI
23rd Oct 2025544 AMAQI
23rd Oct 2025555 AMAQI
23rd Oct 2025556 AMAQI
13°C5/23°C
23rd Oct 2025557 AMAQI
23rd Oct 2025558 AMAQI
23rd Oct 2025559 AMAQI
23rd Oct 20256710 AMAQI
23rd Oct 20257911 AMAQI
23rd Oct 20257012 PMAQI
23rd Oct 2025641 PMAQI
23rd Oct 2025612 PMAQI
23rd Oct 2025633 PMAQI
23rd Oct 2025664 PMAQI
23rd Oct 2025605 PMAQI
23rd Oct 2025556 PMAQI
23rd Oct 2025527 PMAQI
23rd Oct 2025528 PMAQI
23rd Oct 2025529 PMAQI
23rd Oct 20255510 PMAQI
23rd Oct 20255511 PMAQI
24th Oct 20255812 AMAQI
24th Oct 2025621 AMAQI
24th Oct 2025592 AMAQI
24th Oct 2025593 AMAQI
24th Oct 2025584 AMAQI
24th Oct 2025585 AMAQI
24th Oct 2025566 AMAQI
13°C6/23°C
24th Oct 2025587 AMAQI
24th Oct 2025628 AMAQI
24th Oct 2025629 AMAQI
24th Oct 20256810 AMAQI
24th Oct 20257211 AMAQI
24th Oct 20255912 PMAQI
24th Oct 2025511 PMAQI
24th Oct 2025412 PMAQI
24th Oct 2025353 PMAQI
24th Oct 2025344 PMAQI
24th Oct 2025335 PMAQI
24th Oct 2025326 PMAQI
24th Oct 2025367 PMAQI
24th Oct 2025488 PMAQI
24th Oct 2025599 PMAQI
24th Oct 20255710 PMAQI
24th Oct 20255311 PMAQI
25th Oct 20255412 AMAQI
25th Oct 2025561 AMAQI
25th Oct 2025582 AMAQI
25th Oct 2025583 AMAQI
25th Oct 2025544 AMAQI
25th Oct 2025485 AMAQI
25th Oct 2025466 AMAQI
13°C7/20°C
25th Oct 2025467 AMAQI
25th Oct 2025398 AMAQI
25th Oct 2025399 AMAQI
25th Oct 20253910 AMAQI
25th Oct 20253511 AMAQI
25th Oct 20253212 PMAQI
25th Oct 2025261 PMAQI
25th Oct 2025202 PMAQI
25th Oct 2025153 PMAQI
25th Oct 2025124 PMAQI
25th Oct 2025185 PMAQI
25th Oct 2025286 PMAQI
25th Oct 2025287 PMAQI
25th Oct 2025268 PMAQI
25th Oct 2025339 PMAQI
25th Oct 20255110 PMAQI
25th Oct 20255311 PMAQI
26th Oct 20255312 AMAQI
26th Oct 2025531 AMAQI
26th Oct 2025522 AMAQI
26th Oct 2025503 AMAQI
26th Oct 2025484 AMAQI
26th Oct 2025465 AMAQI
26th Oct 2025506 AMAQI
14°C4/24°C
26th Oct 2025507 AMAQI
26th Oct 2025508 AMAQI
26th Oct 2025509 AMAQI
26th Oct 20255010 AMAQI
26th Oct 20255011 AMAQI
26th Oct 20254212 PMAQI
26th Oct 2025311 PMAQI
26th Oct 2025322 PMAQI
26th Oct 2025413 PMAQI
26th Oct 2025544 PMAQI
26th Oct 2025455 PMAQI
26th Oct 2025406 PMAQI
26th Oct 2025487 PMAQI
26th Oct 2025528 PMAQI
26th Oct 2025569 PMAQI
26th Oct 20256410 PMAQI
26th Oct 20257611 PMAQI
27th Oct 20257812 AMAQI
27th Oct 2025801 AMAQI
27th Oct 2025742 AMAQI
27th Oct 2025683 AMAQI
27th Oct 2025654 AMAQI
27th Oct 2025605 AMAQI
27th Oct 2025586 AMAQI
14°C7/23°C
27th Oct 2025577 AMAQI
27th Oct 2025588 AMAQI
27th Oct 2025669 AMAQI
27th Oct 20257210 AMAQI
27th Oct 20256311 AMAQI
27th Oct 20256112 PMAQI
27th Oct 2025631 PMAQI
27th Oct 2025582 PMAQI
27th Oct 2025453 PMAQI
27th Oct 2025354 PMAQI
27th Oct 2025385 PMAQI
27th Oct 2025346 PMAQI
27th Oct 2025267 PMAQI
27th Oct 2025258 PMAQI
27th Oct 2025209 PMAQI
27th Oct 20251110 PMAQI
27th Oct 20251111 PMAQI
28th Oct 20252012 AMAQI
28th Oct 2025311 AMAQI
28th Oct 2025252 AMAQI
28th Oct 2025253 AMAQI
28th Oct 2025264 AMAQI
28th Oct 2025205 AMAQI
28th Oct 2025196 AMAQI
13°C6/22°C
28th Oct 2025227 AMAQI
28th Oct 2025248 AMAQI
28th Oct 2025289 AMAQI
28th Oct 20252810 AMAQI
28th Oct 20252711 AMAQI
28th Oct 20252612 PMAQI
28th Oct 2025331 PMAQI
28th Oct 2025332 PMAQI
28th Oct 2025243 PMAQI
28th Oct 2025204 PMAQI
28th Oct 2025335 PMAQI
28th Oct 2025336 PMAQI
28th Oct 2025287 PMAQI
28th Oct 2025208 PMAQI
28th Oct 2025189 PMAQI
28th Oct 20251710 PMAQI
28th Oct 20251511 PMAQI
29th Oct 20252412 AMAQI
29th Oct 2025411 AMAQI
29th Oct 2025442 AMAQI
29th Oct 2025473 AMAQI
29th Oct 2025504 AMAQI
29th Oct 2025505 AMAQI
29th Oct 2025356 AMAQI
4°C0/9°C
29th Oct 2025207 AMAQI
29th Oct 2025198 AMAQI
29th Oct 2025219 AMAQI
29th Oct 20252510 AMAQI
29th Oct 20252511 AMAQI
29th Oct 20252612 PMAQI
29th Oct 2025271 PMAQI
29th Oct 2025242 PMAQI
29th Oct 2025263 PMAQI
29th Oct 2025324 PMAQI
29th Oct 2025305 PMAQI
29th Oct 2025256 PMAQI
29th Oct 2025327 PMAQI
29th Oct 2025428 PMAQI
29th Oct 2025469 PMAQI
29th Oct 20254510 PMAQI
29th Oct 20254011 PMAQI
30th Oct 20254712 AMAQI
30th Oct 2025561 AMAQI
30th Oct 2025522 AMAQI
30th Oct 2025473 AMAQI
30th Oct 2025464 AMAQI
30th Oct 2025505 AMAQI
30th Oct 2025526 AMAQI
6°C-1/16°C
30th Oct 2025557 AMAQI
30th Oct 2025558 AMAQI
30th Oct 2025559 AMAQI
30th Oct 20255110 AMAQI
30th Oct 20254211 AMAQI
30th Oct 20253512 PMAQI
30th Oct 2025251 PMAQI
30th Oct 2025212 PMAQI
30th Oct 2025213 PMAQI
30th Oct 2025214 PMAQI
30th Oct 2025235 PMAQI
30th Oct 2025386 PMAQI
30th Oct 2025437 PMAQI
30th Oct 2025448 PMAQI
30th Oct 2025449 PMAQI
30th Oct 20253410 PMAQI
30th Oct 20253611 PMAQI
31st Oct 20254312 AMAQI
31st Oct 2025541 AMAQI
31st Oct 2025562 AMAQI
31st Oct 2025533 AMAQI
31st Oct 2025484 AMAQI
31st Oct 2025465 AMAQI
31st Oct 2025516 AMAQI
8°C4/13°C
31st Oct 2025537 AMAQI
31st Oct 2025538 AMAQI
31st Oct 2025539 AMAQI
31st Oct 20254810 AMAQI
31st Oct 20253911 AMAQI
31st Oct 20254012 PMAQI
31st Oct 2025441 PMAQI
31st Oct 2025442 PMAQI
31st Oct 2025383 PMAQI
31st Oct 2025284 PMAQI
31st Oct 2025275 PMAQI
31st Oct 2025286 PMAQI
31st Oct 2025297 PMAQI
31st Oct 2025308 PMAQI
31st Oct 2025329 PMAQI
31st Oct 20254210 PMAQI
31st Oct 20256011 PMAQI
1st Nov 20256712 AMAQI
1st Nov 2025641 AMAQI
1st Nov 2025642 AMAQI
1st Nov 2025593 AMAQI
1st Nov 2025584 AMAQI
1st Nov 2025555 AMAQI
1st Nov 2025556 AMAQI
8°C3/15°C
1st Nov 2025557 AMAQI
1st Nov 2025558 AMAQI
1st Nov 2025509 AMAQI
1st Nov 20254310 AMAQI
1st Nov 20254511 AMAQI
1st Nov 20254312 PMAQI
1st Nov 2025381 PMAQI
1st Nov 2025362 PMAQI
1st Nov 2025323 PMAQI
1st Nov 2025204 PMAQI
1st Nov 2025195 PMAQI
1st Nov 2025486 PMAQI
1st Nov 2025297 PMAQI
1st Nov 2025168 PMAQI
1st Nov 2025199 PMAQI
1st Nov 20252910 PMAQI
1st Nov 20254011 PMAQI
2nd Nov 20254612 AMAQI
2nd Nov 2025501 AMAQI
2nd Nov 2025422 AMAQI
2nd Nov 2025393 AMAQI
2nd Nov 2025374 AMAQI
2nd Nov 2025375 AMAQI
2nd Nov 2025446 AMAQI
9°C0/19°C
2nd Nov 2025377 AMAQI
2nd Nov 2025228 AMAQI
2nd Nov 2025269 AMAQI
2nd Nov 20253310 AMAQI
2nd Nov 20253311 AMAQI
2nd Nov 20252912 PMAQI
2nd Nov 2025201 PMAQI
2nd Nov 2025252 PMAQI
2nd Nov 2025283 PMAQI
2nd Nov 2025214 PMAQI
2nd Nov 2025215 PMAQI
2nd Nov 2025166 PMAQI
2nd Nov 2025147 PMAQI
2nd Nov 2025148 PMAQI
2nd Nov 2025149 PMAQI
2nd Nov 20251610 PMAQI
2nd Nov 20251911 PMAQI
3rd Nov 20253412 AMAQI
3rd Nov 2025521 AMAQI
3rd Nov 2025442 AMAQI
3rd Nov 2025363 AMAQI
3rd Nov 2025334 AMAQI
3rd Nov 2025335 AMAQI
3rd Nov 2025456 AMAQI
16°C8/26°C
3rd Nov 2025577 AMAQI
7 AM3rd Nov 2025578 AMAQI
3rd Nov 2025579 AMAQI
3rd Nov 20255710 AMAQI
3rd Nov 20254811 AMAQI
3rd Nov 20253212 PMAQI
12 PM3rd Nov 2025441 PMAQI
6 PM
12 AM
6 AM
--°C/°C
Day time
Avg. Highest Time
10 AM
54AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
4 PM - 6 PM
38AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 10 AM (Avg. 54), while the lowest AQI was between 4 PM to 6 PM (Avg. 38).
Night time
Avg. Highest Time
1 AM
53AQI
1 hours / Day
30 hours / Month
Avg. Lowest Time
7 PM - 8 PM
39AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 1 AM (Avg. 53), while the lowest AQI was between 7 PM to 8 PM (Avg. 39).
2025 Days Vs Air Quality
Welby, Colorado, United States
2025
88%
268
12%
38
Total number of days with different AQI categories in last 307 days in 2025 (58 days remaining)
Good
268 DaysModerate
38 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 307 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Welby, 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.
-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
40AQI
40AQI
2nd January 2025
39AQI
39AQI
3rd January 2025
52AQI
52AQI
4th January 2025
43AQI
43AQI
5th January 2025
30AQI
30AQI
6th January 2025
46AQI
46AQI
7th January 2025
37AQI
37AQI
8th January 2025
47AQI
47AQI
9th January 2025
35AQI
35AQI
10th January 2025
35AQI
35AQI
11th January 2025
23AQI
23AQI
12th January 2025
25AQI
25AQI
13th January 2025
27AQI
27AQI
14th January 2025
27AQI
27AQI
15th January 2025
39AQI
39AQI
16th January 2025
55AQI
55AQI
17th January 2025
49AQI
49AQI
18th January 2025
20AQI
20AQI
19th January 2025
32AQI
32AQI
20th January 2025
27AQI
27AQI
21st January 2025
30AQI
30AQI
22nd January 2025
24AQI
24AQI
23rd January 2025
30AQI
30AQI
24th January 2025
28AQI
28AQI
25th January 2025
23AQI
23AQI
26th January 2025
40AQI
40AQI
27th January 2025
61AQI
61AQI
28th January 2025
57AQI
57AQI
29th January 2025
52AQI
52AQI
30th January 2025
41AQI
41AQI
31st January 2025
39AQI
39AQI
1st February 2025
28AQI
28AQI
2nd February 2025
25AQI
25AQI
3rd February 2025
27AQI
27AQI
4th February 2025
49AQI
49AQI
5th February 2025
54AQI
54AQI
6th February 2025
24AQI
24AQI
7th February 2025
42AQI
42AQI
8th February 2025
28AQI
28AQI
9th February 2025
25AQI
25AQI
10th February 2025
27AQI
27AQI
11th February 2025
36AQI
36AQI
12th February 2025
34AQI
34AQI
13th February 2025
49AQI
49AQI
14th February 2025
56AQI
56AQI
15th February 2025
37AQI
37AQI
16th February 2025
46AQI
46AQI
17th February 2025
44AQI
44AQI
18th February 2025
34AQI
34AQI
19th February 2025
33AQI
33AQI
20th February 2025
46AQI
46AQI
21st February 2025
34AQI
34AQI
22nd February 2025
33AQI
33AQI
23rd February 2025
20AQI
20AQI
24th February 2025
18AQI
18AQI
25th February 2025
21AQI
21AQI
26th February 2025
18AQI
18AQI
27th February 2025
23AQI
23AQI
28th February 2025
29AQI
29AQI
1st March 2025
26AQI
26AQI
2nd March 2025
25AQI
25AQI
3rd March 2025
31AQI
31AQI
4th March 2025
23AQI
23AQI
5th March 2025
17AQI
17AQI
6th March 2025
23AQI
23AQI
7th March 2025
17AQI
17AQI
8th March 2025
27AQI
27AQI
9th March 2025
23AQI
23AQI
10th March 2025
26AQI
26AQI
11th March 2025
28AQI
28AQI
12th March 2025
25AQI
25AQI
13th March 2025
32AQI
32AQI
14th March 2025
30AQI
30AQI
15th March 2025
21AQI
21AQI
16th March 2025
20AQI
20AQI
17th March 2025
29AQI
29AQI
18th March 2025
36AQI
36AQI
19th March 2025
18AQI
18AQI
20th March 2025
24AQI
24AQI
21st March 2025
21AQI
21AQI
22nd March 2025
22AQI
22AQI
23rd March 2025
17AQI
17AQI
24th March 2025
27AQI
27AQI
25th March 2025
22AQI
22AQI
26th March 2025
30AQI
30AQI
27th March 2025
38AQI
38AQI
28th March 2025
35AQI
35AQI
29th March 2025
20AQI
20AQI
30th March 2025
22AQI
22AQI
31st March 2025
41AQI
41AQI
1st April 2025
29AQI
29AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
21AQI
21AQI
4th April 2025
22AQI
22AQI
5th April 2025
26AQI
26AQI
6th April 2025
26AQI
26AQI
7th April 2025
30AQI
30AQI
8th April 2025
36AQI
36AQI
9th April 2025
41AQI
41AQI
10th April 2025
45AQI
45AQI
11th April 2025
47AQI
47AQI
12th April 2025
36AQI
36AQI
13th April 2025
26AQI
26AQI
14th April 2025
18AQI
18AQI
15th April 2025
35AQI
35AQI
16th April 2025
33AQI
33AQI
17th April 2025
34AQI
34AQI
18th April 2025
12AQI
12AQI
19th April 2025
21AQI
21AQI
20th April 2025
24AQI
24AQI
21st April 2025
20AQI
20AQI
22nd April 2025
24AQI
24AQI
23rd April 2025
32AQI
32AQI
24th April 2025
53AQI
53AQI
25th April 2025
24AQI
24AQI
26th April 2025
25AQI
25AQI
27th April 2025
33AQI
33AQI
28th April 2025
18AQI
18AQI
29th April 2025
20AQI
20AQI
30th April 2025
22AQI
22AQI
1st May 2025
16AQI
16AQI
2nd May 2025
21AQI
21AQI
3rd May 2025
24AQI
24AQI
4th May 2025
24AQI
24AQI
5th May 2025
22AQI
22AQI
6th May 2025
18AQI
18AQI
7th May 2025
21AQI
21AQI
8th May 2025
31AQI
31AQI
9th May 2025
30AQI
30AQI
10th May 2025
30AQI
30AQI
11th May 2025
24AQI
24AQI
12th May 2025
28AQI
28AQI
13th May 2025
37AQI
37AQI
14th May 2025
38AQI
38AQI
15th May 2025
16AQI
16AQI
16th May 2025
17AQI
17AQI
17th May 2025
18AQI
18AQI
18th May 2025
30AQI
30AQI
19th May 2025
14AQI
14AQI
20th May 2025
17AQI
17AQI
21st May 2025
19AQI
19AQI
22nd May 2025
27AQI
27AQI
23rd May 2025
31AQI
31AQI
24th May 2025
40AQI
40AQI
25th May 2025
16AQI
16AQI
26th May 2025
18AQI
18AQI
27th May 2025
31AQI
31AQI
28th May 2025
22AQI
22AQI
29th May 2025
19AQI
19AQI
30th May 2025
25AQI
25AQI
31st May 2025
27AQI
27AQI
1st June 2025
29AQI
29AQI
2nd June 2025
25AQI
25AQI
3rd June 2025
18AQI
18AQI
4th June 2025
32AQI
32AQI
5th June 2025
35AQI
35AQI
6th June 2025
27AQI
27AQI
7th June 2025
23AQI
23AQI
8th June 2025
30AQI
30AQI
9th June 2025
51AQI
51AQI
10th June 2025
44AQI
44AQI
11th June 2025
30AQI
30AQI
12th June 2025
31AQI
31AQI
13th June 2025
31AQI
31AQI
14th June 2025
33AQI
33AQI
15th June 2025
28AQI
28AQI
16th June 2025
33AQI
33AQI
17th June 2025
30AQI
30AQI
18th June 2025
28AQI
28AQI
19th June 2025
32AQI
32AQI
20th June 2025
36AQI
36AQI
21st June 2025
38AQI
38AQI
22nd June 2025
38AQI
38AQI
23rd June 2025
37AQI
37AQI
24th June 2025
46AQI
46AQI
25th June 2025
38AQI
38AQI
26th June 2025
31AQI
31AQI
27th June 2025
32AQI
32AQI
28th June 2025
37AQI
37AQI
29th June 2025
36AQI
36AQI
30th June 2025
32AQI
32AQI
1st July 2025
35AQI
35AQI
2nd July 2025
32AQI
32AQI
3rd July 2025
29AQI
29AQI
4th July 2025
26AQI
26AQI
5th July 2025
42AQI
42AQI
6th July 2025
31AQI
31AQI
7th July 2025
30AQI
30AQI
8th July 2025
34AQI
34AQI
9th July 2025
36AQI
36AQI
10th July 2025
38AQI
38AQI
11th July 2025
40AQI
40AQI
12th July 2025
57AQI
57AQI
13th July 2025
51AQI
51AQI
14th July 2025
40AQI
40AQI
15th July 2025
37AQI
37AQI
16th July 2025
42AQI
42AQI
17th July 2025
48AQI
48AQI
18th July 2025
51AQI
51AQI
19th July 2025
50AQI
50AQI
20th July 2025
39AQI
39AQI
21st July 2025
34AQI
34AQI
22nd July 2025
32AQI
32AQI
23rd July 2025
27AQI
27AQI
24th July 2025
30AQI
30AQI
25th July 2025
34AQI
34AQI
26th July 2025
40AQI
40AQI
27th July 2025
32AQI
32AQI
28th July 2025
36AQI
36AQI
29th July 2025
46AQI
46AQI
30th July 2025
42AQI
42AQI
31st July 2025
54AQI
54AQI
1st August 2025
54AQI
54AQI
2nd August 2025
38AQI
38AQI
3rd August 2025
26AQI
26AQI
4th August 2025
38AQI
38AQI
5th August 2025
56AQI
56AQI
6th August 2025
77AQI
77AQI
7th August 2025
63AQI
63AQI
8th August 2025
57AQI
57AQI
9th August 2025
51AQI
51AQI
10th August 2025
43AQI
43AQI
11th August 2025
39AQI
39AQI
12th August 2025
40AQI
40AQI
13th August 2025
47AQI
47AQI
14th August 2025
57AQI
57AQI
15th August 2025
58AQI
58AQI
16th August 2025
52AQI
52AQI
17th August 2025
32AQI
32AQI
18th August 2025
38AQI
38AQI
19th August 2025
25AQI
25AQI
20th August 2025
35AQI
35AQI
21st August 2025
44AQI
44AQI
22nd August 2025
42AQI
42AQI
23rd August 2025
43AQI
43AQI
24th August 2025
45AQI
45AQI
25th August 2025
47AQI
47AQI
26th August 2025
50AQI
50AQI
27th August 2025
44AQI
44AQI
28th August 2025
32AQI
32AQI
29th August 2025
42AQI
42AQI
30th August 2025
45AQI
45AQI
31st August 2025
40AQI
40AQI
1st September 2025
39AQI
39AQI
2nd September 2025
45AQI
45AQI
3rd September 2025
55AQI
55AQI
4th September 2025
71AQI
71AQI
5th September 2025
79AQI
79AQI
6th September 2025
69AQI
69AQI
7th September 2025
59AQI
59AQI
8th September 2025
38AQI
38AQI
9th September 2025
35AQI
35AQI
10th September 2025
29AQI
29AQI
11th September 2025
27AQI
27AQI
12th September 2025
23AQI
23AQI
13th September 2025
19AQI
19AQI
14th September 2025
18AQI
18AQI
15th September 2025
23AQI
23AQI
16th September 2025
25AQI
25AQI
17th September 2025
18AQI
18AQI
18th September 2025
20AQI
20AQI
19th September 2025
29AQI
29AQI
20th September 2025
30AQI
30AQI
21st September 2025
25AQI
25AQI
22nd September 2025
23AQI
23AQI
23rd September 2025
21AQI
21AQI
24th September 2025
29AQI
29AQI
25th September 2025
34AQI
34AQI
26th September 2025
30AQI
30AQI
27th September 2025
26AQI
26AQI
28th September 2025
24AQI
24AQI
29th September 2025
28AQI
28AQI
30th September 2025
21AQI
21AQI
1st October 2025
35AQI
35AQI
2nd October 2025
51AQI
51AQI
3rd October 2025
53AQI
53AQI
4th October 2025
46AQI
46AQI
5th October 2025
36AQI
36AQI
6th October 2025
24AQI
24AQI
7th October 2025
61AQI
61AQI
8th October 2025
68AQI
68AQI
9th October 2025
56AQI
56AQI
10th October 2025
56AQI
56AQI
11th October 2025
62AQI
62AQI
12th October 2025
43AQI
43AQI
13th October 2025
29AQI
29AQI
14th October 2025
49AQI
49AQI
15th October 2025
66AQI
66AQI
16th October 2025
44AQI
44AQI
17th October 2025
42AQI
42AQI
18th October 2025
50AQI
50AQI
19th October 2025
39AQI
39AQI
20th October 2025
32AQI
32AQI
21st October 2025
37AQI
37AQI
22nd October 2025
42AQI
42AQI
23rd October 2025
57AQI
57AQI
24th October 2025
53AQI
53AQI
25th October 2025
40AQI
40AQI
26th October 2025
50AQI
50AQI
27th October 2025
52AQI
52AQI
28th October 2025
25AQI
25AQI
29th October 2025
35AQI
35AQI
30th October 2025
43AQI
43AQI
31st October 2025
43AQI
43AQI
1st November 2025
45AQI
45AQI
2nd November 2025
31AQI
31AQI
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
37AQI
34AQI
26AQI
28AQI
24AQI
33AQI
39AQI
45AQI
34AQI
46AQI
38AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202535AQI
26
5
26
2
31
29
1
31
29
1
27
4
22
9
25
5
20
11
2
268
38
Highest AQI recorded in
October46AQI
Lowest AQI recorded in
May24AQI
202456AQI
31
29
31
30
31
30
31
26
5
23
4
17
14
26
4
26
5
118
245
Highest AQI recorded in
June70AQI
Lowest AQI recorded in
November28AQI
202366AQI
31
28
31
30
31
30
31
31
30
31
1
27
13
18
14
349
Highest AQI recorded in
July70AQI
Lowest AQI recorded in
December40AQI
202270AQI
30
22
31
17
30
29
20
3
29
31
30
29
301
Highest AQI recorded in
April73AQI
Lowest AQI recorded in
November68AQI
202154AQI
30
28
30
1
30
9
17
27
31
31
24
31
30
31
127
223
Highest AQI recorded in
June71AQI
Lowest AQI recorded in
February22AQI
202040AQI
13
19
1
19
26
4
24
7
13
18
13
16
1
18
13
27
2
29
2
201
63
1
Highest AQI recorded in
August57AQI
Lowest AQI recorded in
December25AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2022(Avg.)
70AQILeast Polluted Year Recorded
2025(Avg.)
35AQIWelby's annual 2025 AQI (35) shows an average percentage change of -37.1% (improved AQI) compared to previous years: 2020 (40), 2021 (54), 2022 (70), 2023 (66), 2024 (56).
