Aspen, 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
Aspen, Colorado, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
7th Aug 2021
133AQILowest AQI recorded on
25th Aug 2024
7AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 33 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 1st Aug - 2nd Aug 2025
Aspen, Colorado, United States
AQI
Day
Night
.
5 AM1st Aug 2025
8 PM
4 AM2nd Aug 2025
Day time
Avg. Highest Time
11AM1st Aug
44AQI
Avg. Lowest Time
6PM1st Aug
25AQI
Night time
Avg. Highest Time
5AM1st Aug
34AQI
Avg. Lowest Time
9PM1st Aug
25AQI
In the last 24 hours,
Aspen's AQI reached its highest point of 44 at 11 AM during the Day, while the lowest point, 25, was recorded at 9 PM during the Night between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Aspen, Colorado, United States
JulAug
03rd - 04th04th - 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
Day
Night
3rd Jul 2025205 AMAQI
3rd Jul 2025186 AMAQI
3rd Jul 2025207 AMAQI
3rd Jul 2025218 AMAQI
3rd Jul 2025219 AMAQI
3rd Jul 20252310 AMAQI
3rd Jul 20252611 AMAQI
3rd Jul 20252312 PMAQI
3rd Jul 2025211 PMAQI
3rd Jul 2025232 PMAQI
3rd Jul 2025233 PMAQI
3rd Jul 2025224 PMAQI
3rd Jul 2025235 PMAQI
3rd Jul 2025236 PMAQI
3rd Jul 2025237 PMAQI
3rd Jul 2025218 PMAQI
3rd Jul 2025209 PMAQI
3rd Jul 20252010 PMAQI
3rd Jul 20252111 PMAQI
4th Jul 20252112 AMAQI
4th Jul 2025211 AMAQI
4th Jul 2025222 AMAQI
4th Jul 2025213 AMAQI
4th Jul 2025204 AMAQI
13°C6/21°C
4th Jul 2025215 AMAQI
4th Jul 2025216 AMAQI
4th Jul 2025237 AMAQI
4th Jul 2025228 AMAQI
4th Jul 2025239 AMAQI
4th Jul 20252510 AMAQI
4th Jul 20252511 AMAQI
4th Jul 20252412 PMAQI
4th Jul 2025241 PMAQI
4th Jul 2025222 PMAQI
4th Jul 2025223 PMAQI
4th Jul 2025224 PMAQI
4th Jul 2025215 PMAQI
4th Jul 2025216 PMAQI
4th Jul 2025217 PMAQI
4th Jul 2025218 PMAQI
4th Jul 2025219 PMAQI
4th Jul 20252110 PMAQI
4th Jul 20252211 PMAQI
5th Jul 20252412 AMAQI
5th Jul 2025261 AMAQI
5th Jul 2025282 AMAQI
5th Jul 2025263 AMAQI
5th Jul 2025244 AMAQI
15°C11/20°C
5th Jul 2025225 AMAQI
5th Jul 2025236 AMAQI
5th Jul 2025257 AMAQI
5th Jul 2025238 AMAQI
5th Jul 2025219 AMAQI
5th Jul 20252210 AMAQI
5th Jul 20252211 AMAQI
5th Jul 20252012 PMAQI
5th Jul 2025211 PMAQI
5th Jul 2025232 PMAQI
5th Jul 2025243 PMAQI
5th Jul 2025244 PMAQI
5th Jul 2025235 PMAQI
5th Jul 2025236 PMAQI
5th Jul 2025237 PMAQI
5th Jul 2025248 PMAQI
5th Jul 2025229 PMAQI
5th Jul 20252110 PMAQI
5th Jul 20252211 PMAQI
6th Jul 20252312 AMAQI
6th Jul 2025241 AMAQI
6th Jul 2025262 AMAQI
6th Jul 2025263 AMAQI
6th Jul 2025244 AMAQI
17°C6/25°C
6th Jul 2025235 AMAQI
6th Jul 2025186 AMAQI
6th Jul 2025197 AMAQI
6th Jul 2025208 AMAQI
6th Jul 2025219 AMAQI
6th Jul 20252210 AMAQI
6th Jul 20252011 AMAQI
6th Jul 20252012 PMAQI
6th Jul 2025201 PMAQI
6th Jul 2025212 PMAQI
6th Jul 2025223 PMAQI
6th Jul 2025204 PMAQI
6th Jul 2025225 PMAQI
6th Jul 2025206 PMAQI
6th Jul 2025207 PMAQI
6th Jul 2025228 PMAQI
6th Jul 2025209 PMAQI
6th Jul 20252010 PMAQI
6th Jul 20252111 PMAQI
7th Jul 20252112 AMAQI
7th Jul 2025221 AMAQI
7th Jul 2025232 AMAQI
7th Jul 2025223 AMAQI
7th Jul 2025214 AMAQI
17°C6/24°C
7th Jul 2025215 AMAQI
7th Jul 2025206 AMAQI
7th Jul 2025187 AMAQI
7th Jul 2025198 AMAQI
7th Jul 2025199 AMAQI
7th Jul 20251910 AMAQI
7th Jul 20251811 AMAQI
7th Jul 20251912 PMAQI
7th Jul 2025201 PMAQI
7th Jul 2025192 PMAQI
7th Jul 2025193 PMAQI
7th Jul 2025194 PMAQI
7th Jul 2025195 PMAQI
7th Jul 2025196 PMAQI
7th Jul 2025217 PMAQI
7th Jul 2025208 PMAQI
7th Jul 2025189 PMAQI
7th Jul 20252010 PMAQI
7th Jul 20252011 PMAQI
8th Jul 20252012 AMAQI
8th Jul 2025211 AMAQI
8th Jul 2025202 AMAQI
8th Jul 2025223 AMAQI
8th Jul 2025184 AMAQI
15°C4/24°C
8th Jul 2025205 AMAQI
8th Jul 2025226 AMAQI
8th Jul 2025217 AMAQI
8th Jul 2025228 AMAQI
8th Jul 2025219 AMAQI
8th Jul 20252110 AMAQI
8th Jul 20252211 AMAQI
8th Jul 20252312 PMAQI
8th Jul 2025301 PMAQI
8th Jul 2025282 PMAQI
8th Jul 2025283 PMAQI
8th Jul 2025244 PMAQI
8th Jul 2025225 PMAQI
8th Jul 2025206 PMAQI
8th Jul 2025217 PMAQI
8th Jul 2025218 PMAQI
8th Jul 2025209 PMAQI
8th Jul 20252010 PMAQI
8th Jul 20251911 PMAQI
9th Jul 20252112 AMAQI
9th Jul 2025211 AMAQI
9th Jul 2025252 AMAQI
9th Jul 2025233 AMAQI
9th Jul 2025224 AMAQI
17°C7/26°C
9th Jul 2025195 AMAQI
9th Jul 2025186 AMAQI
9th Jul 2025197 AMAQI
9th Jul 2025188 AMAQI
9th Jul 2025219 AMAQI
9th Jul 20252210 AMAQI
9th Jul 20252311 AMAQI
9th Jul 20252612 PMAQI
9th Jul 2025211 PMAQI
9th Jul 2025222 PMAQI
9th Jul 2025203 PMAQI
9th Jul 2025204 PMAQI
9th Jul 2025205 PMAQI
9th Jul 2025206 PMAQI
9th Jul 2025217 PMAQI
9th Jul 2025218 PMAQI
9th Jul 2025259 PMAQI
9th Jul 20252410 PMAQI
9th Jul 20252411 PMAQI
10th Jul 20252312 AMAQI
10th Jul 2025221 AMAQI
10th Jul 2025202 AMAQI
10th Jul 2025193 AMAQI
10th Jul 2025204 AMAQI
19°C9/28°C
10th Jul 2025185 AMAQI
10th Jul 2025176 AMAQI
10th Jul 2025187 AMAQI
10th Jul 2025188 AMAQI
10th Jul 2025189 AMAQI
10th Jul 20251910 AMAQI
10th Jul 20252011 AMAQI
10th Jul 20251912 PMAQI
10th Jul 2025201 PMAQI
10th Jul 2025212 PMAQI
10th Jul 2025253 PMAQI
10th Jul 2025404 PMAQI
10th Jul 2025475 PMAQI
10th Jul 2025546 PMAQI
10th Jul 2025287 PMAQI
10th Jul 2025278 PMAQI
10th Jul 2025439 PMAQI
10th Jul 20253910 PMAQI
10th Jul 20253711 PMAQI
11th Jul 20253612 AMAQI
11th Jul 2025361 AMAQI
11th Jul 2025352 AMAQI
11th Jul 2025413 AMAQI
11th Jul 2025324 AMAQI
18°C10/25°C
11th Jul 2025385 AMAQI
11th Jul 2025396 AMAQI
11th Jul 2025347 AMAQI
11th Jul 2025358 AMAQI
11th Jul 2025369 AMAQI
11th Jul 20253710 AMAQI
11th Jul 20253911 AMAQI
11th Jul 20253712 PMAQI
11th Jul 2025351 PMAQI
11th Jul 2025322 PMAQI
11th Jul 2025353 PMAQI
11th Jul 2025364 PMAQI
11th Jul 2025395 PMAQI
11th Jul 2025366 PMAQI
11th Jul 2025357 PMAQI
11th Jul 2025368 PMAQI
11th Jul 2025329 PMAQI
11th Jul 20253210 PMAQI
11th Jul 20253411 PMAQI
12th Jul 20253612 AMAQI
12th Jul 2025351 AMAQI
12th Jul 2025352 AMAQI
12th Jul 2025323 AMAQI
12th Jul 2025344 AMAQI
17°C6/24°C
12th Jul 2025325 AMAQI
12th Jul 2025296 AMAQI
12th Jul 2025297 AMAQI
12th Jul 2025288 AMAQI
12th Jul 2025289 AMAQI
12th Jul 20253010 AMAQI
12th Jul 20253311 AMAQI
12th Jul 20252812 PMAQI
12th Jul 2025271 PMAQI
12th Jul 2025292 PMAQI
12th Jul 2025303 PMAQI
12th Jul 2025294 PMAQI
12th Jul 2025285 PMAQI
12th Jul 2025286 PMAQI
12th Jul 2025307 PMAQI
12th Jul 2025298 PMAQI
12th Jul 2025269 PMAQI
12th Jul 20252610 PMAQI
12th Jul 20252611 PMAQI
13th Jul 20252812 AMAQI
13th Jul 2025271 AMAQI
13th Jul 2025272 AMAQI
13th Jul 2025263 AMAQI
13th Jul 2025284 AMAQI
17°C4/25°C
13th Jul 2025305 AMAQI
13th Jul 2025256 AMAQI
13th Jul 2025247 AMAQI
13th Jul 2025258 AMAQI
13th Jul 2025259 AMAQI
13th Jul 20252610 AMAQI
13th Jul 20252711 AMAQI
13th Jul 20252612 PMAQI
13th Jul 2025251 PMAQI
13th Jul 2025252 PMAQI
13th Jul 2025253 PMAQI
13th Jul 2025254 PMAQI
13th Jul 2025245 PMAQI
13th Jul 2025246 PMAQI
13th Jul 2025277 PMAQI
13th Jul 2025248 PMAQI
13th Jul 2025269 PMAQI
13th Jul 20252510 PMAQI
13th Jul 20252311 PMAQI
14th Jul 20252212 AMAQI
14th Jul 2025231 AMAQI
14th Jul 2025202 AMAQI
14th Jul 2025223 AMAQI
14th Jul 2025234 AMAQI
15°C7/25°C
14th Jul 2025205 AMAQI
14th Jul 2025186 AMAQI
14th Jul 2025197 AMAQI
14th Jul 2025198 AMAQI
14th Jul 2025219 AMAQI
14th Jul 20252810 AMAQI
14th Jul 20253011 AMAQI
14th Jul 20252312 PMAQI
14th Jul 2025221 PMAQI
14th Jul 2025232 PMAQI
14th Jul 2025263 PMAQI
14th Jul 2025254 PMAQI
14th Jul 2025265 PMAQI
14th Jul 2025266 PMAQI
14th Jul 2025247 PMAQI
14th Jul 2025248 PMAQI
14th Jul 2025269 PMAQI
14th Jul 20252710 PMAQI
14th Jul 20252711 PMAQI
15th Jul 20253012 AMAQI
15th Jul 2025291 AMAQI
15th Jul 2025292 AMAQI
15th Jul 2025283 AMAQI
15th Jul 2025264 AMAQI
17°C7/25°C
15th Jul 2025275 AMAQI
15th Jul 2025316 AMAQI
15th Jul 2025357 AMAQI
15th Jul 2025378 AMAQI
15th Jul 2025469 AMAQI
15th Jul 20255510 AMAQI
15th Jul 20255111 AMAQI
15th Jul 20255212 PMAQI
15th Jul 2025551 PMAQI
15th Jul 2025542 PMAQI
15th Jul 2025513 PMAQI
15th Jul 2025484 PMAQI
15th Jul 2025485 PMAQI
15th Jul 2025486 PMAQI
15th Jul 2025437 PMAQI
15th Jul 2025408 PMAQI
15th Jul 2025409 PMAQI
15th Jul 20253910 PMAQI
15th Jul 20254011 PMAQI
16th Jul 20254012 AMAQI
16th Jul 2025431 AMAQI
16th Jul 2025432 AMAQI
16th Jul 2025463 AMAQI
16th Jul 2025494 AMAQI
17°C8/25°C
16th Jul 2025565 AMAQI
16th Jul 2025616 AMAQI
16th Jul 2025587 AMAQI
16th Jul 2025608 AMAQI
16th Jul 2025639 AMAQI
16th Jul 20256610 AMAQI
16th Jul 20256611 AMAQI
16th Jul 20256712 PMAQI
16th Jul 2025701 PMAQI
16th Jul 2025682 PMAQI
16th Jul 2025643 PMAQI
16th Jul 2025654 PMAQI
16th Jul 2025675 PMAQI
16th Jul 2025626 PMAQI
16th Jul 2025587 PMAQI
16th Jul 2025558 PMAQI
16th Jul 2025569 PMAQI
16th Jul 20255710 PMAQI
16th Jul 20255611 PMAQI
17th Jul 20255612 AMAQI
17th Jul 2025551 AMAQI
17th Jul 2025562 AMAQI
17th Jul 2025563 AMAQI
17th Jul 2025554 AMAQI
16°C7/23°C
17th Jul 2025555 AMAQI
17th Jul 2025536 AMAQI
17th Jul 2025557 AMAQI
17th Jul 2025548 AMAQI
17th Jul 2025569 AMAQI
17th Jul 20255810 AMAQI
17th Jul 20255811 AMAQI
17th Jul 20256112 PMAQI
17th Jul 2025611 PMAQI
17th Jul 2025592 PMAQI
17th Jul 2025583 PMAQI
17th Jul 2025564 PMAQI
17th Jul 2025555 PMAQI
17th Jul 2025556 PMAQI
17th Jul 2025557 PMAQI
17th Jul 2025548 PMAQI
17th Jul 2025539 PMAQI
17th Jul 20255410 PMAQI
17th Jul 20255211 PMAQI
18th Jul 20255212 AMAQI
18th Jul 2025511 AMAQI
18th Jul 2025552 AMAQI
18th Jul 2025533 AMAQI
18th Jul 2025524 AMAQI
14°C6/21°C
18th Jul 2025515 AMAQI
18th Jul 2025506 AMAQI
18th Jul 2025527 AMAQI
18th Jul 2025518 AMAQI
18th Jul 2025529 AMAQI
18th Jul 20255210 AMAQI
18th Jul 20255211 AMAQI
18th Jul 20254412 PMAQI
18th Jul 2025421 PMAQI
18th Jul 2025422 PMAQI
18th Jul 2025473 PMAQI
18th Jul 2025454 PMAQI
18th Jul 2025455 PMAQI
18th Jul 2025436 PMAQI
18th Jul 2025487 PMAQI
18th Jul 2025488 PMAQI
18th Jul 2025409 PMAQI
18th Jul 20254010 PMAQI
18th Jul 20253911 PMAQI
19th Jul 20253912 AMAQI
19th Jul 2025401 AMAQI
19th Jul 2025402 AMAQI
19th Jul 2025383 AMAQI
19th Jul 2025394 AMAQI
15°C6/23°C
19th Jul 2025295 AMAQI
19th Jul 2025286 AMAQI
19th Jul 2025287 AMAQI
19th Jul 2025288 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20253010 AMAQI
19th Jul 20253011 AMAQI
19th Jul 20252812 PMAQI
19th Jul 2025271 PMAQI
19th Jul 2025282 PMAQI
19th Jul 2025293 PMAQI
19th Jul 2025294 PMAQI
19th Jul 2025285 PMAQI
19th Jul 2025286 PMAQI
19th Jul 2025307 PMAQI
19th Jul 2025308 PMAQI
19th Jul 2025289 PMAQI
19th Jul 20252710 PMAQI
19th Jul 20252711 PMAQI
20th Jul 20252712 AMAQI
20th Jul 2025271 AMAQI
20th Jul 2025282 AMAQI
20th Jul 2025283 AMAQI
20th Jul 2025294 AMAQI
17°C7/23°C
20th Jul 2025265 AMAQI
20th Jul 2025246 AMAQI
20th Jul 2025257 AMAQI
20th Jul 2025248 AMAQI
20th Jul 2025249 AMAQI
20th Jul 20252410 AMAQI
20th Jul 20252411 AMAQI
20th Jul 20252512 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025252 PMAQI
20th Jul 2025263 PMAQI
20th Jul 2025264 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025256 PMAQI
20th Jul 2025237 PMAQI
20th Jul 2025248 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252410 PMAQI
20th Jul 20252411 PMAQI
21st Jul 20252312 AMAQI
21st Jul 2025241 AMAQI
21st Jul 2025242 AMAQI
21st Jul 2025243 AMAQI
21st Jul 2025244 AMAQI
18°C9/24°C
21st Jul 2025235 AMAQI
21st Jul 2025236 AMAQI
21st Jul 2025247 AMAQI
21st Jul 2025248 AMAQI
21st Jul 2025259 AMAQI
21st Jul 20252810 AMAQI
21st Jul 20253211 AMAQI
21st Jul 20253312 PMAQI
21st Jul 2025291 PMAQI
21st Jul 2025282 PMAQI
21st Jul 2025263 PMAQI
21st Jul 2025244 PMAQI
21st Jul 2025245 PMAQI
21st Jul 2025246 PMAQI
21st Jul 2025267 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025229 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252111 PMAQI
22nd Jul 20252212 AMAQI
22nd Jul 2025231 AMAQI
22nd Jul 2025232 AMAQI
22nd Jul 2025223 AMAQI
22nd Jul 2025224 AMAQI
16°C8/22°C
22nd Jul 2025205 AMAQI
22nd Jul 2025196 AMAQI
22nd Jul 2025197 AMAQI
22nd Jul 2025208 AMAQI
22nd Jul 2025219 AMAQI
22nd Jul 20252210 AMAQI
22nd Jul 20252211 AMAQI
22nd Jul 20252112 PMAQI
22nd Jul 2025211 PMAQI
22nd Jul 2025212 PMAQI
22nd Jul 2025223 PMAQI
22nd Jul 2025224 PMAQI
22nd Jul 2025235 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025217 PMAQI
22nd Jul 2025228 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252210 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025212 AMAQI
23rd Jul 2025203 AMAQI
23rd Jul 2025204 AMAQI
16°C8/22°C
23rd Jul 2025195 AMAQI
23rd Jul 2025206 AMAQI
23rd Jul 2025217 AMAQI
23rd Jul 2025218 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20252310 AMAQI
23rd Jul 20252311 AMAQI
23rd Jul 20252212 PMAQI
23rd Jul 2025221 PMAQI
23rd Jul 2025222 PMAQI
23rd Jul 2025243 PMAQI
23rd Jul 2025224 PMAQI
23rd Jul 2025225 PMAQI
23rd Jul 2025216 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025219 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252311 PMAQI
24th Jul 20252212 AMAQI
24th Jul 2025221 AMAQI
24th Jul 2025242 AMAQI
24th Jul 2025233 AMAQI
24th Jul 2025234 AMAQI
16°C11/21°C
24th Jul 2025225 AMAQI
24th Jul 2025226 AMAQI
24th Jul 2025257 AMAQI
24th Jul 2025258 AMAQI
24th Jul 2025289 AMAQI
24th Jul 20253210 AMAQI
24th Jul 20253311 AMAQI
24th Jul 20253712 PMAQI
24th Jul 2025411 PMAQI
24th Jul 2025492 PMAQI
24th Jul 2025463 PMAQI
24th Jul 2025484 PMAQI
24th Jul 2025495 PMAQI
24th Jul 2025496 PMAQI
24th Jul 2025347 PMAQI
24th Jul 2025318 PMAQI
24th Jul 2025409 PMAQI
24th Jul 20253910 PMAQI
24th Jul 20253811 PMAQI
25th Jul 20253912 AMAQI
25th Jul 2025351 AMAQI
25th Jul 2025352 AMAQI
25th Jul 2025343 AMAQI
25th Jul 2025354 AMAQI
16°C6/22°C
25th Jul 2025395 AMAQI
25th Jul 2025406 AMAQI
25th Jul 2025387 AMAQI
25th Jul 2025398 AMAQI
25th Jul 2025419 AMAQI
25th Jul 20254010 AMAQI
25th Jul 20254211 AMAQI
25th Jul 20254112 PMAQI
25th Jul 2025381 PMAQI
25th Jul 2025402 PMAQI
25th Jul 2025403 PMAQI
25th Jul 2025394 PMAQI
25th Jul 2025395 PMAQI
25th Jul 2025366 PMAQI
25th Jul 2025407 PMAQI
25th Jul 2025418 PMAQI
25th Jul 2025379 PMAQI
25th Jul 20253710 PMAQI
25th Jul 20253811 PMAQI
26th Jul 20253712 AMAQI
26th Jul 2025371 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025383 AMAQI
26th Jul 2025374 AMAQI
15°C6/23°C
26th Jul 2025345 AMAQI
26th Jul 2025336 AMAQI
26th Jul 2025347 AMAQI
26th Jul 2025328 AMAQI
26th Jul 2025329 AMAQI
26th Jul 20253210 AMAQI
26th Jul 20253011 AMAQI
26th Jul 20253012 PMAQI
26th Jul 2025271 PMAQI
26th Jul 2025282 PMAQI
26th Jul 2025283 PMAQI
26th Jul 2025294 PMAQI
26th Jul 2025305 PMAQI
26th Jul 2025316 PMAQI
26th Jul 2025357 PMAQI
26th Jul 2025368 PMAQI
26th Jul 2025329 PMAQI
26th Jul 20252810 PMAQI
26th Jul 20252711 PMAQI
27th Jul 20252812 AMAQI
27th Jul 2025271 AMAQI
27th Jul 2025272 AMAQI
27th Jul 2025273 AMAQI
27th Jul 2025274 AMAQI
16°C7/24°C
27th Jul 2025245 AMAQI
27th Jul 2025236 AMAQI
27th Jul 2025227 AMAQI
27th Jul 2025238 AMAQI
27th Jul 2025289 AMAQI
27th Jul 20252310 AMAQI
27th Jul 20252011 AMAQI
27th Jul 20252212 PMAQI
27th Jul 2025201 PMAQI
27th Jul 2025222 PMAQI
27th Jul 2025253 PMAQI
27th Jul 2025224 PMAQI
27th Jul 2025225 PMAQI
27th Jul 2025226 PMAQI
27th Jul 2025247 PMAQI
27th Jul 2025248 PMAQI
27th Jul 2025229 PMAQI
27th Jul 20252310 PMAQI
27th Jul 20252411 PMAQI
28th Jul 20252512 AMAQI
28th Jul 2025261 AMAQI
28th Jul 2025252 AMAQI
28th Jul 2025243 AMAQI
28th Jul 2025254 AMAQI
17°C6/26°C
28th Jul 2025245 AMAQI
28th Jul 2025256 AMAQI
28th Jul 2025277 AMAQI
28th Jul 2025298 AMAQI
28th Jul 2025279 AMAQI
28th Jul 20252810 AMAQI
28th Jul 20253011 AMAQI
28th Jul 20252612 PMAQI
28th Jul 2025261 PMAQI
28th Jul 2025252 PMAQI
28th Jul 2025253 PMAQI
28th Jul 2025244 PMAQI
28th Jul 2025245 PMAQI
28th Jul 2025246 PMAQI
28th Jul 2025247 PMAQI
28th Jul 2025238 PMAQI
28th Jul 2025239 PMAQI
28th Jul 20252410 PMAQI
28th Jul 20252411 PMAQI
29th Jul 20254012 AMAQI
29th Jul 2025241 AMAQI
29th Jul 2025232 AMAQI
29th Jul 2025233 AMAQI
29th Jul 2025234 AMAQI
16°C8/26°C
29th Jul 2025235 AMAQI
29th Jul 2025206 AMAQI
29th Jul 2025227 AMAQI
29th Jul 2025238 AMAQI
29th Jul 2025249 AMAQI
29th Jul 20252610 AMAQI
29th Jul 20253011 AMAQI
29th Jul 20253412 PMAQI
29th Jul 2025321 PMAQI
29th Jul 2025272 PMAQI
29th Jul 2025263 PMAQI
29th Jul 2025254 PMAQI
29th Jul 2025265 PMAQI
29th Jul 2025256 PMAQI
29th Jul 2025267 PMAQI
29th Jul 2025258 PMAQI
29th Jul 2025249 PMAQI
29th Jul 20252510 PMAQI
29th Jul 20252611 PMAQI
30th Jul 20252812 AMAQI
30th Jul 2025281 AMAQI
30th Jul 2025292 AMAQI
30th Jul 2025283 AMAQI
30th Jul 2025284 AMAQI
16°C9/23°C
30th Jul 2025255 AMAQI
30th Jul 2025246 AMAQI
30th Jul 2025267 AMAQI
30th Jul 2025258 AMAQI
30th Jul 2025269 AMAQI
30th Jul 20252810 AMAQI
30th Jul 20252811 AMAQI
30th Jul 20252812 PMAQI
30th Jul 2025291 PMAQI
30th Jul 2025322 PMAQI
30th Jul 2025323 PMAQI
30th Jul 2025324 PMAQI
30th Jul 2025325 PMAQI
30th Jul 2025326 PMAQI
30th Jul 2025327 PMAQI
30th Jul 2025328 PMAQI
30th Jul 2025439 PMAQI
30th Jul 20254510 PMAQI
30th Jul 20254411 PMAQI
31st Jul 20254112 AMAQI
31st Jul 2025381 AMAQI
31st Jul 2025402 AMAQI
31st Jul 2025373 AMAQI
31st Jul 2025354 AMAQI
15°C6/24°C
31st Jul 2025375 AMAQI
31st Jul 2025406 AMAQI
31st Jul 2025477 AMAQI
31st Jul 2025488 AMAQI
31st Jul 2025509 AMAQI
31st Jul 20255210 AMAQI
31st Jul 20255011 AMAQI
31st Jul 20255012 PMAQI
31st Jul 2025521 PMAQI
31st Jul 2025452 PMAQI
31st Jul 2025453 PMAQI
31st Jul 2025434 PMAQI
31st Jul 2025425 PMAQI
31st Jul 2025426 PMAQI
31st Jul 2025487 PMAQI
31st Jul 2025408 PMAQI
31st Jul 2025299 PMAQI
31st Jul 20252510 PMAQI
31st Jul 20252411 PMAQI
1st Aug 20252312 AMAQI
1st Aug 2025231 AMAQI
1st Aug 2025242 AMAQI
1st Aug 2025363 AMAQI
1st Aug 2025364 AMAQI
14°C5/22°C
1st Aug 2025345 AMAQI
1st Aug 2025356 AMAQI
1st Aug 2025377 AMAQI
1st Aug 2025338 AMAQI
1st Aug 2025359 AMAQI
1st Aug 20254110 AMAQI
1st Aug 20254411 AMAQI
1st Aug 20254012 PMAQI
1st Aug 2025401 PMAQI
1st Aug 2025402 PMAQI
1st Aug 2025373 PMAQI
1st Aug 2025364 PMAQI
1st Aug 2025345 PMAQI
1st Aug 2025256 PMAQI
1st Aug 2025357 PMAQI
1st Aug 2025288 PMAQI
1st Aug 2025259 PMAQI
1st Aug 20252810 PMAQI
1st Aug 20252911 PMAQI
2nd Aug 20253112 AMAQI
2nd Aug 2025291 AMAQI
2nd Aug 2025322 AMAQI
2nd Aug 2025323 AMAQI
2nd Aug 2025294 AMAQI
13°C5/21°C
2nd Aug 2025245 AMAQI
5 AM2nd Aug 2025256 AMAQI
2nd Aug 2025287 AMAQI
2nd Aug 2025268 AMAQI
2nd Aug 2025279 AMAQI
2nd Aug 20252610 AMAQI
2nd Aug 20252911 AMAQI
2nd Aug 20252812 PMAQI
12 PM2nd Aug 2025271 PMAQI
2nd Aug 2025252 PMAQI
2nd Aug 2025263 PMAQI
2nd Aug 2025244 PMAQI
2nd Aug 2025265 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
10 AM - 8 PM
31AQI
11 hours / Day
330 hours / Month
Avg. Lowest Time
5 AM - 9 AM
29AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 8 PM (Avg. 31), while the lowest AQI was between 5 AM to 9 AM (Avg. 29).
Night time
Avg. Highest Time
12 AM - 11 PM
29AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
29AQI
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. 29), while the lowest AQI was between 12 AM to 11 PM (Avg. 29).
2025 Days Vs Air Quality
Aspen, Colorado, United States
2025
99%
210
1%
3
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
210 DaysModerate
3 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 99%
Health Risk Level:
Very Low
In 2025, 99% of 214 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
Aspen, Colorado, United States
AQI levels in 2025
AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
1st January 2025
25AQI
25AQI
2nd January 2025
24AQI
24AQI
3rd January 2025
25AQI
25AQI
4th January 2025
20AQI
20AQI
5th January 2025
20AQI
20AQI
6th January 2025
21AQI
21AQI
7th January 2025
22AQI
22AQI
8th January 2025
22AQI
22AQI
9th January 2025
19AQI
19AQI
10th January 2025
27AQI
27AQI
11th January 2025
21AQI
21AQI
12th January 2025
26AQI
26AQI
13th January 2025
44AQI
44AQI
14th January 2025
27AQI
27AQI
15th January 2025
24AQI
24AQI
16th January 2025
22AQI
22AQI
17th January 2025
25AQI
25AQI
18th January 2025
20AQI
20AQI
19th January 2025
20AQI
20AQI
20th January 2025
22AQI
22AQI
21st January 2025
24AQI
24AQI
22nd January 2025
23AQI
23AQI
23rd January 2025
22AQI
22AQI
24th January 2025
19AQI
19AQI
25th January 2025
20AQI
20AQI
26th January 2025
31AQI
31AQI
27th January 2025
33AQI
33AQI
28th January 2025
29AQI
29AQI
29th January 2025
28AQI
28AQI
30th January 2025
29AQI
29AQI
31st January 2025
33AQI
33AQI
1st February 2025
28AQI
28AQI
2nd February 2025
20AQI
20AQI
3rd February 2025
26AQI
26AQI
4th February 2025
26AQI
26AQI
5th February 2025
25AQI
25AQI
6th February 2025
31AQI
31AQI
7th February 2025
30AQI
30AQI
8th February 2025
22AQI
22AQI
9th February 2025
21AQI
21AQI
10th February 2025
21AQI
21AQI
11th February 2025
23AQI
23AQI
12th February 2025
22AQI
22AQI
13th February 2025
16AQI
16AQI
14th February 2025
16AQI
16AQI
15th February 2025
17AQI
17AQI
16th February 2025
14AQI
14AQI
17th February 2025
14AQI
14AQI
18th February 2025
14AQI
14AQI
19th February 2025
15AQI
15AQI
20th February 2025
16AQI
16AQI
21st February 2025
18AQI
18AQI
22nd February 2025
17AQI
17AQI
23rd February 2025
18AQI
18AQI
24th February 2025
18AQI
18AQI
25th February 2025
17AQI
17AQI
26th February 2025
18AQI
18AQI
27th February 2025
22AQI
22AQI
28th February 2025
28AQI
28AQI
1st March 2025
29AQI
29AQI
2nd March 2025
29AQI
29AQI
3rd March 2025
21AQI
21AQI
4th March 2025
14AQI
14AQI
5th March 2025
16AQI
16AQI
6th March 2025
12AQI
12AQI
7th March 2025
12AQI
12AQI
8th March 2025
14AQI
14AQI
9th March 2025
18AQI
18AQI
10th March 2025
25AQI
25AQI
11th March 2025
25AQI
25AQI
12th March 2025
19AQI
19AQI
13th March 2025
29AQI
29AQI
14th March 2025
57AQI
57AQI
15th March 2025
16AQI
16AQI
16th March 2025
16AQI
16AQI
17th March 2025
23AQI
23AQI
18th March 2025
22AQI
22AQI
19th March 2025
17AQI
17AQI
20th March 2025
20AQI
20AQI
21st March 2025
17AQI
17AQI
22nd March 2025
16AQI
16AQI
23rd March 2025
15AQI
15AQI
24th March 2025
18AQI
18AQI
25th March 2025
22AQI
22AQI
26th March 2025
28AQI
28AQI
27th March 2025
28AQI
28AQI
28th March 2025
26AQI
26AQI
29th March 2025
18AQI
18AQI
30th March 2025
29AQI
29AQI
31st March 2025
30AQI
30AQI
1st April 2025
19AQI
19AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
17AQI
17AQI
4th April 2025
16AQI
16AQI
5th April 2025
14AQI
14AQI
6th April 2025
15AQI
15AQI
7th April 2025
21AQI
21AQI
8th April 2025
24AQI
24AQI
9th April 2025
32AQI
32AQI
10th April 2025
38AQI
38AQI
11th April 2025
30AQI
30AQI
12th April 2025
23AQI
23AQI
13th April 2025
20AQI
20AQI
14th April 2025
18AQI
18AQI
15th April 2025
22AQI
22AQI
16th April 2025
19AQI
19AQI
17th April 2025
19AQI
19AQI
18th April 2025
16AQI
16AQI
19th April 2025
14AQI
14AQI
20th April 2025
13AQI
13AQI
21st April 2025
14AQI
14AQI
22nd April 2025
15AQI
15AQI
23rd April 2025
16AQI
16AQI
24th April 2025
15AQI
15AQI
25th April 2025
16AQI
16AQI
26th April 2025
16AQI
16AQI
27th April 2025
18AQI
18AQI
28th April 2025
14AQI
14AQI
29th April 2025
13AQI
13AQI
30th April 2025
15AQI
15AQI
1st May 2025
14AQI
14AQI
2nd May 2025
16AQI
16AQI
3rd May 2025
15AQI
15AQI
4th May 2025
16AQI
16AQI
5th May 2025
14AQI
14AQI
6th May 2025
14AQI
14AQI
7th May 2025
15AQI
15AQI
8th May 2025
15AQI
15AQI
9th May 2025
15AQI
15AQI
10th May 2025
16AQI
16AQI
11th May 2025
17AQI
17AQI
12th May 2025
20AQI
20AQI
13th May 2025
21AQI
21AQI
14th May 2025
26AQI
26AQI
15th May 2025
15AQI
15AQI
16th May 2025
16AQI
16AQI
17th May 2025
14AQI
14AQI
18th May 2025
14AQI
14AQI
19th May 2025
16AQI
16AQI
20th May 2025
19AQI
19AQI
21st May 2025
15AQI
15AQI
22nd May 2025
18AQI
18AQI
23rd May 2025
20AQI
20AQI
24th May 2025
18AQI
18AQI
25th May 2025
17AQI
17AQI
26th May 2025
17AQI
17AQI
27th May 2025
17AQI
17AQI
28th May 2025
22AQI
22AQI
29th May 2025
17AQI
17AQI
30th May 2025
18AQI
18AQI
31st May 2025
19AQI
19AQI
1st June 2025
18AQI
18AQI
2nd June 2025
18AQI
18AQI
3rd June 2025
18AQI
18AQI
4th June 2025
20AQI
20AQI
5th June 2025
17AQI
17AQI
6th June 2025
17AQI
17AQI
7th June 2025
20AQI
20AQI
8th June 2025
21AQI
21AQI
9th June 2025
21AQI
21AQI
10th June 2025
22AQI
22AQI
11th June 2025
20AQI
20AQI
12th June 2025
20AQI
20AQI
13th June 2025
23AQI
23AQI
14th June 2025
22AQI
22AQI
15th June 2025
20AQI
20AQI
16th June 2025
22AQI
22AQI
17th June 2025
21AQI
21AQI
18th June 2025
20AQI
20AQI
19th June 2025
22AQI
22AQI
20th June 2025
29AQI
29AQI
21st June 2025
25AQI
25AQI
22nd June 2025
23AQI
23AQI
23rd June 2025
20AQI
20AQI
24th June 2025
21AQI
21AQI
25th June 2025
21AQI
21AQI
26th June 2025
22AQI
22AQI
27th June 2025
31AQI
31AQI
28th June 2025
31AQI
31AQI
29th June 2025
27AQI
27AQI
30th June 2025
23AQI
23AQI
1st July 2025
23AQI
23AQI
2nd July 2025
23AQI
23AQI
3rd July 2025
22AQI
22AQI
4th July 2025
22AQI
22AQI
5th July 2025
23AQI
23AQI
6th July 2025
22AQI
22AQI
7th July 2025
20AQI
20AQI
8th July 2025
21AQI
21AQI
9th July 2025
22AQI
22AQI
10th July 2025
27AQI
27AQI
11th July 2025
36AQI
36AQI
12th July 2025
30AQI
30AQI
13th July 2025
26AQI
26AQI
14th July 2025
24AQI
24AQI
15th July 2025
40AQI
40AQI
16th July 2025
57AQI
57AQI
17th July 2025
56AQI
56AQI
18th July 2025
48AQI
48AQI
19th July 2025
31AQI
31AQI
20th July 2025
25AQI
25AQI
21st July 2025
25AQI
25AQI
22nd July 2025
22AQI
22AQI
23rd July 2025
21AQI
21AQI
24th July 2025
33AQI
33AQI
25th July 2025
38AQI
38AQI
26th July 2025
33AQI
33AQI
27th July 2025
24AQI
24AQI
28th July 2025
25AQI
25AQI
29th July 2025
26AQI
26AQI
30th July 2025
31AQI
31AQI
31st July 2025
41AQI
41AQI
1st August 2025
33AQI
33AQI
25AQI
20AQI
22AQI
19AQI
17AQI
22AQI
30AQI
33AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202522AQI
31
28
30
1
30
31
30
29
2
1
210
3
Highest AQI recorded in
August33AQI
Lowest AQI recorded in
May17AQI
202420AQI
30
1
28
1
31
30
31
29
29
2
30
1
30
31
30
31
360
5
Highest AQI recorded in
July37AQI
Lowest AQI recorded in
May9AQI
202321AQI
31
28
31
28
1
1
30
1
30
30
1
22
2
12
1
28
27
4
297
10
1
Highest AQI recorded in
July31AQI
Lowest AQI recorded in
January13AQI
202221AQI
30
20
2
31
16
1
29
2
29
1
21
3
25
4
31
28
2
31
294
12
Highest AQI recorded in
September29AQI
Lowest AQI recorded in
July17AQI
202126AQI
30
28
31
29
1
28
19
2
17
9
17
12
2
25
5
31
30
31
316
29
2
Highest AQI recorded in
August50AQI
Lowest AQI recorded in
May14AQI
202025AQI
13
20
19
30
31
20
6
23
5
2
26
5
28
1
31
241
17
2
Highest AQI recorded in
September43AQI
Lowest AQI recorded in
March9AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2021(Avg.)
26AQILeast Polluted Year Recorded
2024(Avg.)
20AQIAspen's annual 2025 AQI (22) shows an average percentage change of -0.6% (improved AQI) compared to previous years: 2020 (25), 2021 (26), 2022 (21), 2023 (21), 2024 (20).
