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 (20th November ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 43 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: 19th Nov - 20th Nov 2025
Welby, Colorado, United States
AQI
Day
Night
.
6 AM19th Nov 2025
5 PM
5 AM20th Nov 2025
Day time
Avg. Highest Time
9AM19th Nov
59AQI
Avg. Lowest Time
3PM19th Nov
17AQI
Night time
Avg. Highest Time
4AM20th Nov
52AQI
Avg. Lowest Time
5PM19th Nov
30AQI
In the last 24 hours,
Welby's AQI reached its highest point of 59 at 9 AM during the Day, while the lowest point, 17, was recorded at 3 PM during the Day between 19th Nov and 20th Nov 2025.
Day & Night AQI Trend : Oct - Nov 2025
Welby, Colorado, United States
OctNov
21st - 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 - 17th17th - 18th18th - 19th19th - 20th20th
Day
Night
21st Oct 2025196 AMAQI
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
--°C/°C
22nd Oct 2025466 AMAQI
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
13°C5/23°C
23rd Oct 2025556 AMAQI
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
13°C6/23°C
24th Oct 2025566 AMAQI
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
13°C7/20°C
25th Oct 2025466 AMAQI
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
14°C4/24°C
26th Oct 2025506 AMAQI
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
14°C7/23°C
27th Oct 2025586 AMAQI
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
13°C6/22°C
28th Oct 2025196 AMAQI
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
4°C0/9°C
29th Oct 2025356 AMAQI
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
6°C-1/16°C
30th Oct 2025526 AMAQI
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
8°C4/13°C
31st Oct 2025516 AMAQI
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
8°C3/15°C
1st Nov 2025556 AMAQI
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
9°C0/19°C
2nd Nov 2025446 AMAQI
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
16°C8/26°C
3rd Nov 2025456 AMAQI
3rd Nov 2025577 AMAQI
3rd Nov 2025578 AMAQI
3rd Nov 2025579 AMAQI
3rd Nov 20255710 AMAQI
3rd Nov 20254811 AMAQI
3rd Nov 20253212 PMAQI
3rd Nov 2025441 PMAQI
3rd Nov 2025382 PMAQI
3rd Nov 2025363 PMAQI
3rd Nov 2025384 PMAQI
3rd Nov 2025445 PMAQI
3rd Nov 2025556 PMAQI
3rd Nov 2025657 PMAQI
3rd Nov 2025498 PMAQI
3rd Nov 2025219 PMAQI
3rd Nov 20253410 PMAQI
3rd Nov 20255711 PMAQI
4th Nov 20253512 AMAQI
4th Nov 2025221 AMAQI
4th Nov 2025202 AMAQI
4th Nov 2025173 AMAQI
4th Nov 2025174 AMAQI
4th Nov 2025175 AMAQI
8°C3/12°C
4th Nov 2025256 AMAQI
4th Nov 2025357 AMAQI
4th Nov 2025418 AMAQI
4th Nov 2025449 AMAQI
4th Nov 20254310 AMAQI
4th Nov 20254411 AMAQI
4th Nov 20254412 PMAQI
4th Nov 2025361 PMAQI
4th Nov 2025302 PMAQI
4th Nov 2025283 PMAQI
4th Nov 2025294 PMAQI
4th Nov 2025395 PMAQI
4th Nov 2025576 PMAQI
4th Nov 2025667 PMAQI
4th Nov 2025688 PMAQI
4th Nov 2025579 PMAQI
4th Nov 20254510 PMAQI
4th Nov 20253611 PMAQI
5th Nov 20253812 AMAQI
5th Nov 2025461 AMAQI
5th Nov 2025462 AMAQI
5th Nov 2025533 AMAQI
5th Nov 2025514 AMAQI
5th Nov 2025525 AMAQI
13°C4/22°C
5th Nov 2025456 AMAQI
5th Nov 2025487 AMAQI
5th Nov 2025708 AMAQI
5th Nov 2025749 AMAQI
5th Nov 20256410 AMAQI
5th Nov 20256311 AMAQI
5th Nov 20255712 PMAQI
5th Nov 2025391 PMAQI
5th Nov 2025172 PMAQI
5th Nov 2025173 PMAQI
5th Nov 2025314 PMAQI
5th Nov 2025555 PMAQI
5th Nov 2025586 PMAQI
5th Nov 2025577 PMAQI
5th Nov 2025588 PMAQI
5th Nov 2025399 PMAQI
5th Nov 20252510 PMAQI
5th Nov 20252511 PMAQI
6th Nov 20252012 AMAQI
6th Nov 2025201 AMAQI
6th Nov 2025352 AMAQI
6th Nov 2025533 AMAQI
6th Nov 2025534 AMAQI
6th Nov 2025535 AMAQI
11°C5/21°C
6th Nov 2025506 AMAQI
6th Nov 2025547 AMAQI
6th Nov 2025708 AMAQI
6th Nov 2025629 AMAQI
6th Nov 20253010 AMAQI
6th Nov 20253011 AMAQI
6th Nov 20254512 PMAQI
6th Nov 2025821 PMAQI
6th Nov 2025842 PMAQI
6th Nov 2025683 PMAQI
6th Nov 2025554 PMAQI
6th Nov 2025445 PMAQI
6th Nov 2025356 PMAQI
6th Nov 2025287 PMAQI
6th Nov 2025248 PMAQI
6th Nov 2025239 PMAQI
6th Nov 20252610 PMAQI
6th Nov 20252611 PMAQI
7th Nov 20253212 AMAQI
7th Nov 2025401 AMAQI
7th Nov 2025332 AMAQI
7th Nov 2025333 AMAQI
7th Nov 2025334 AMAQI
7th Nov 2025335 AMAQI
12°C5/19°C
7th Nov 2025336 AMAQI
7th Nov 2025317 AMAQI
7th Nov 2025418 AMAQI
7th Nov 2025549 AMAQI
7th Nov 20255310 AMAQI
7th Nov 20254611 AMAQI
7th Nov 20253612 PMAQI
7th Nov 2025281 PMAQI
7th Nov 2025282 PMAQI
7th Nov 2025333 PMAQI
7th Nov 2025334 PMAQI
7th Nov 2025355 PMAQI
7th Nov 2025346 PMAQI
7th Nov 2025287 PMAQI
7th Nov 2025308 PMAQI
7th Nov 2025419 PMAQI
7th Nov 20254810 PMAQI
7th Nov 20255011 PMAQI
8th Nov 20253712 AMAQI
8th Nov 2025251 AMAQI
8th Nov 2025432 AMAQI
8th Nov 2025403 AMAQI
8th Nov 2025284 AMAQI
8th Nov 2025265 AMAQI
10°C3/15°C
8th Nov 2025246 AMAQI
8th Nov 2025287 AMAQI
8th Nov 2025288 AMAQI
8th Nov 2025219 AMAQI
8th Nov 20251110 AMAQI
8th Nov 20251311 AMAQI
8th Nov 20251212 PMAQI
8th Nov 2025141 PMAQI
8th Nov 2025212 PMAQI
8th Nov 2025293 PMAQI
8th Nov 2025324 PMAQI
8th Nov 2025325 PMAQI
8th Nov 2025326 PMAQI
8th Nov 2025287 PMAQI
8th Nov 2025278 PMAQI
8th Nov 2025259 PMAQI
8th Nov 20252510 PMAQI
8th Nov 20252811 PMAQI
9th Nov 20253812 AMAQI
9th Nov 2025531 AMAQI
9th Nov 2025482 AMAQI
9th Nov 2025473 AMAQI
9th Nov 2025484 AMAQI
9th Nov 2025445 AMAQI
6°C0/11°C
9th Nov 2025466 AMAQI
9th Nov 2025467 AMAQI
9th Nov 2025398 AMAQI
9th Nov 2025399 AMAQI
9th Nov 20253010 AMAQI
9th Nov 20251711 AMAQI
9th Nov 20251712 PMAQI
9th Nov 2025151 PMAQI
9th Nov 2025122 PMAQI
9th Nov 2025113 PMAQI
9th Nov 2025114 PMAQI
9th Nov 2025115 PMAQI
9th Nov 2025126 PMAQI
9th Nov 2025167 PMAQI
9th Nov 2025188 PMAQI
9th Nov 2025179 PMAQI
9th Nov 20251710 PMAQI
9th Nov 20251711 PMAQI
10th Nov 20252112 AMAQI
10th Nov 2025261 AMAQI
10th Nov 2025202 AMAQI
10th Nov 2025353 AMAQI
10th Nov 2025534 AMAQI
10th Nov 2025535 AMAQI
4°C-4/12°C
10th Nov 2025476 AMAQI
10th Nov 2025457 AMAQI
10th Nov 2025528 AMAQI
10th Nov 2025519 AMAQI
10th Nov 20255110 AMAQI
10th Nov 20255011 AMAQI
10th Nov 20255112 PMAQI
10th Nov 2025471 PMAQI
10th Nov 2025362 PMAQI
10th Nov 2025293 PMAQI
10th Nov 2025294 PMAQI
10th Nov 2025325 PMAQI
10th Nov 2025316 PMAQI
10th Nov 2025277 PMAQI
10th Nov 2025258 PMAQI
10th Nov 2025179 PMAQI
10th Nov 20251710 PMAQI
10th Nov 20251611 PMAQI
11th Nov 20252412 AMAQI
11th Nov 2025341 AMAQI
11th Nov 2025322 AMAQI
11th Nov 2025423 AMAQI
11th Nov 2025504 AMAQI
11th Nov 2025505 AMAQI
10°C0/22°C
11th Nov 2025346 AMAQI
11th Nov 2025387 AMAQI
11th Nov 2025718 AMAQI
11th Nov 2025659 AMAQI
11th Nov 20254010 AMAQI
11th Nov 20254011 AMAQI
11th Nov 20254712 PMAQI
11th Nov 2025541 PMAQI
11th Nov 2025502 PMAQI
11th Nov 2025433 PMAQI
11th Nov 2025384 PMAQI
11th Nov 2025395 PMAQI
11th Nov 2025436 PMAQI
11th Nov 2025497 PMAQI
11th Nov 2025498 PMAQI
11th Nov 2025459 PMAQI
11th Nov 20254210 PMAQI
11th Nov 20254511 PMAQI
12th Nov 20253412 AMAQI
12th Nov 2025311 AMAQI
12th Nov 2025522 AMAQI
12th Nov 2025523 AMAQI
12th Nov 2025534 AMAQI
12th Nov 2025535 AMAQI
15°C11/22°C
12th Nov 2025546 AMAQI
12th Nov 2025567 AMAQI
12th Nov 2025638 AMAQI
12th Nov 2025759 AMAQI
12th Nov 20255710 AMAQI
12th Nov 20252611 AMAQI
12th Nov 20252612 PMAQI
12th Nov 2025481 PMAQI
12th Nov 2025812 PMAQI
12th Nov 2025533 PMAQI
12th Nov 2025454 PMAQI
12th Nov 2025735 PMAQI
12th Nov 2025506 PMAQI
12th Nov 2025277 PMAQI
12th Nov 2025268 PMAQI
12th Nov 2025459 PMAQI
12th Nov 20257210 PMAQI
12th Nov 20256611 PMAQI
13th Nov 20255012 AMAQI
13th Nov 2025241 AMAQI
13th Nov 2025292 AMAQI
13th Nov 2025303 AMAQI
13th Nov 2025274 AMAQI
13th Nov 2025285 AMAQI
12°C4/20°C
13th Nov 2025266 AMAQI
13th Nov 2025387 AMAQI
13th Nov 2025578 AMAQI
13th Nov 2025599 AMAQI
13th Nov 20254510 AMAQI
13th Nov 20253111 AMAQI
13th Nov 20253212 PMAQI
13th Nov 2025321 PMAQI
13th Nov 2025302 PMAQI
13th Nov 2025243 PMAQI
13th Nov 2025244 PMAQI
13th Nov 2025285 PMAQI
13th Nov 2025396 PMAQI
13th Nov 2025417 PMAQI
13th Nov 2025358 PMAQI
13th Nov 2025329 PMAQI
13th Nov 20253310 PMAQI
13th Nov 20253511 PMAQI
14th Nov 20252712 AMAQI
14th Nov 2025341 AMAQI
14th Nov 2025502 AMAQI
14th Nov 2025473 AMAQI
14th Nov 2025444 AMAQI
14th Nov 2025445 AMAQI
14°C5/23°C
14th Nov 2025446 AMAQI
14th Nov 2025347 AMAQI
14th Nov 2025308 AMAQI
14th Nov 2025409 AMAQI
14th Nov 20254910 AMAQI
14th Nov 20255311 AMAQI
14th Nov 20255012 PMAQI
14th Nov 2025451 PMAQI
14th Nov 2025382 PMAQI
14th Nov 2025323 PMAQI
14th Nov 2025264 PMAQI
14th Nov 2025445 PMAQI
14th Nov 2025446 PMAQI
14th Nov 2025447 PMAQI
14th Nov 2025628 PMAQI
14th Nov 2025619 PMAQI
14th Nov 20255710 PMAQI
14th Nov 20255011 PMAQI
15th Nov 20254012 AMAQI
15th Nov 2025221 AMAQI
15th Nov 2025202 AMAQI
15th Nov 2025473 AMAQI
15th Nov 2025614 AMAQI
15th Nov 2025425 AMAQI
13°C5/20°C
15th Nov 2025396 AMAQI
15th Nov 2025397 AMAQI
15th Nov 2025418 AMAQI
15th Nov 2025449 AMAQI
15th Nov 20254410 AMAQI
15th Nov 20254411 AMAQI
15th Nov 20254012 PMAQI
15th Nov 2025341 PMAQI
15th Nov 2025272 PMAQI
15th Nov 2025223 PMAQI
15th Nov 2025194 PMAQI
15th Nov 2025235 PMAQI
15th Nov 2025306 PMAQI
15th Nov 2025397 PMAQI
15th Nov 2025458 PMAQI
15th Nov 2025459 PMAQI
15th Nov 20254810 PMAQI
15th Nov 20255011 PMAQI
16th Nov 20253512 AMAQI
16th Nov 2025221 AMAQI
16th Nov 2025222 AMAQI
16th Nov 2025223 AMAQI
16th Nov 2025224 AMAQI
16th Nov 2025225 AMAQI
14°C8/23°C
16th Nov 2025306 AMAQI
16th Nov 2025407 AMAQI
16th Nov 2025378 AMAQI
16th Nov 2025319 AMAQI
16th Nov 20252610 AMAQI
16th Nov 20251711 AMAQI
16th Nov 20251712 PMAQI
16th Nov 2025191 PMAQI
16th Nov 2025222 PMAQI
16th Nov 2025183 PMAQI
16th Nov 2025194 PMAQI
16th Nov 2025205 PMAQI
16th Nov 2025216 PMAQI
16th Nov 2025247 PMAQI
16th Nov 2025268 PMAQI
16th Nov 2025309 PMAQI
16th Nov 20253510 PMAQI
16th Nov 20254111 PMAQI
17th Nov 20251912 AMAQI
17th Nov 2025371 AMAQI
17th Nov 2025422 AMAQI
17th Nov 2025283 AMAQI
17th Nov 2025284 AMAQI
17th Nov 2025285 AMAQI
13°C5/22°C
17th Nov 2025316 AMAQI
17th Nov 2025147 AMAQI
17th Nov 2025258 AMAQI
17th Nov 2025399 AMAQI
17th Nov 20253810 AMAQI
17th Nov 20252811 AMAQI
17th Nov 20252712 PMAQI
17th Nov 2025261 PMAQI
17th Nov 2025302 PMAQI
17th Nov 2025403 PMAQI
17th Nov 2025384 PMAQI
17th Nov 2025325 PMAQI
17th Nov 2025236 PMAQI
17th Nov 2025187 PMAQI
17th Nov 2025168 PMAQI
17th Nov 2025119 PMAQI
17th Nov 20251210 PMAQI
17th Nov 20251411 PMAQI
18th Nov 20251612 AMAQI
18th Nov 2025341 AMAQI
18th Nov 2025392 AMAQI
18th Nov 2025393 AMAQI
18th Nov 2025364 AMAQI
18th Nov 2025335 AMAQI
10°C7/16°C
18th Nov 2025336 AMAQI
18th Nov 2025337 AMAQI
18th Nov 2025348 AMAQI
18th Nov 2025369 AMAQI
18th Nov 20254110 AMAQI
18th Nov 20254011 AMAQI
18th Nov 20253512 PMAQI
18th Nov 2025301 PMAQI
18th Nov 2025232 PMAQI
18th Nov 2025173 PMAQI
18th Nov 2025214 PMAQI
18th Nov 2025255 PMAQI
18th Nov 2025276 PMAQI
18th Nov 2025257 PMAQI
18th Nov 2025278 PMAQI
18th Nov 2025339 PMAQI
18th Nov 20253910 PMAQI
18th Nov 20254011 PMAQI
19th Nov 20253212 AMAQI
19th Nov 2025201 AMAQI
19th Nov 2025172 AMAQI
19th Nov 2025173 AMAQI
19th Nov 2025174 AMAQI
19th Nov 2025175 AMAQI
9°C3/17°C
19th Nov 2025176 AMAQI
19th Nov 2025367 AMAQI
19th Nov 2025578 AMAQI
19th Nov 2025599 AMAQI
19th Nov 20255710 AMAQI
19th Nov 20255111 AMAQI
19th Nov 20254312 PMAQI
19th Nov 2025361 PMAQI
19th Nov 2025282 PMAQI
19th Nov 2025173 PMAQI
19th Nov 2025184 PMAQI
19th Nov 2025305 PMAQI
19th Nov 2025416 PMAQI
19th Nov 2025477 PMAQI
19th Nov 2025498 PMAQI
19th Nov 2025479 PMAQI
19th Nov 20254510 PMAQI
19th Nov 20254311 PMAQI
20th Nov 20253112 AMAQI
20th Nov 2025341 AMAQI
20th Nov 2025472 AMAQI
20th Nov 2025473 AMAQI
20th Nov 2025524 AMAQI
20th Nov 2025525 AMAQI
11°C3/19°C
20th Nov 2025506 AMAQI
6 AM20th Nov 2025507 AMAQI
20th Nov 2025508 AMAQI
20th Nov 2025499 AMAQI
20th Nov 20255010 AMAQI
20th Nov 20255111 AMAQI
11 AM20th Nov 20253912 PMAQI
20th Nov 2025441 PMAQI
20th Nov 2025412 PMAQI
20th Nov 2025443 PMAQI
20th Nov 2025494 PMAQI
20th Nov 2025515 PMAQI
5 PM20th Nov 2025526 PMAQI
11 PM
5 AM
7°C5/10°C
Day time
Avg. Highest Time
8 AM - 9 AM
48AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
4 PM
32AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 9 AM (Avg. 48), while the lowest AQI was between 4 PM to 4 PM (Avg. 32).
Night time
Avg. Highest Time
1 AM - 4 AM
42AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
6 PM - 9 PM
36AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 4 AM (Avg. 42), while the lowest AQI was between 6 PM to 9 PM (Avg. 36).
2025 Days Vs Air Quality
Welby, Colorado, United States
2025
88%
286
12%
38
Total number of days with different AQI categories in last 325 days in 2025 (40 days remaining)
Good
286 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 325 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
45AQI
45AQI
4th November 2025
37AQI
37AQI
5th November 2025
48AQI
48AQI
6th November 2025
40AQI
40AQI
7th November 2025
37AQI
37AQI
8th November 2025
28AQI
28AQI
9th November 2025
30AQI
30AQI
10th November 2025
33AQI
33AQI
11th November 2025
42AQI
42AQI
12th November 2025
49AQI
49AQI
13th November 2025
35AQI
35AQI
14th November 2025
44AQI
44AQI
15th November 2025
37AQI
37AQI
16th November 2025
26AQI
26AQI
17th November 2025
27AQI
27AQI
18th November 2025
32AQI
32AQI
19th November 2025
34AQI
34AQI
20th November 2025
43AQI
43AQI
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
37AQI
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
20
286
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 -36.8% (improved AQI) compared to previous years: 2020 (40), 2021 (54), 2022 (70), 2023 (66), 2024 (56).
