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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Athens, Boulder, Colorado, United States Historical Air Quality Analysis

Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!

Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+

August Air Quality Analysis

Athens, Boulder, Colorado, United States

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
21st Aug 2023
85AQI
Lowest AQI recorded on
18th Aug 2024
14AQI

Same Day Analysis (11th August):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 29 of Good air quality, showing improvement over 2025 on the same day.

Day & Night AQI Trend: 10th Aug - 11th Aug 2026

Athens, Boulder, Colorado, United States

AQI
Day
Night
.

5 AM10th Aug 2026

8 PM

4 AM11th Aug 2026

Day time
Avg. Highest Time
1PM10th Aug

50AQI

Avg. Lowest Time
8PM10th Aug

31AQI

Night time
Avg. Highest Time
5AM10th Aug

38AQI

Avg. Lowest Time
4AM11th Aug

29AQI

In the last 24 hours,

Athens's AQI reached its highest point of 50 at 1 PM during the Day, while the lowest point, 29, was recorded at 4 AM during the Night between 10th Aug and 11th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Athens, Boulder, Colorado, United States

JulAug
13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th
Day
Night
13th Jul 2026125 AMAQI
13th Jul 2026106 AMAQI
13th Jul 2026127 AMAQI
13th Jul 2026168 AMAQI
13th Jul 2026189 AMAQI
13th Jul 20262010 AMAQI
13th Jul 20262111 AMAQI
13th Jul 20262512 PMAQI
13th Jul 2026241 PMAQI
13th Jul 2026232 PMAQI
13th Jul 2026243 PMAQI
13th Jul 2026264 PMAQI
13th Jul 2026285 PMAQI
13th Jul 2026286 PMAQI
13th Jul 2026267 PMAQI
13th Jul 2026278 PMAQI
13th Jul 2026269 PMAQI
13th Jul 20262410 PMAQI
13th Jul 20262211 PMAQI
14th Jul 20262012 AMAQI
14th Jul 2026201 AMAQI
14th Jul 2026192 AMAQI
14th Jul 2026183 AMAQI
14th Jul 2026164 AMAQI

26°C15/36°C

14th Jul 2026165 AMAQI
14th Jul 2026166 AMAQI
14th Jul 2026147 AMAQI
14th Jul 2026188 AMAQI
14th Jul 2026189 AMAQI
14th Jul 20262010 AMAQI
14th Jul 20262511 AMAQI
14th Jul 20262612 PMAQI
14th Jul 2026241 PMAQI
14th Jul 2026282 PMAQI
14th Jul 2026343 PMAQI
14th Jul 2026334 PMAQI
14th Jul 2026365 PMAQI
14th Jul 2026286 PMAQI
14th Jul 2026247 PMAQI
14th Jul 2026238 PMAQI
14th Jul 2026219 PMAQI
14th Jul 20262010 PMAQI
14th Jul 20261811 PMAQI
15th Jul 20261712 AMAQI
15th Jul 2026181 AMAQI
15th Jul 2026182 AMAQI
15th Jul 2026163 AMAQI
15th Jul 2026164 AMAQI

25°C15/34°C

15th Jul 2026145 AMAQI
15th Jul 2026136 AMAQI
15th Jul 2026147 AMAQI
15th Jul 2026198 AMAQI
15th Jul 2026209 AMAQI
15th Jul 20262210 AMAQI
15th Jul 20262311 AMAQI
15th Jul 20262412 PMAQI
15th Jul 2026261 PMAQI
15th Jul 2026302 PMAQI
15th Jul 2026303 PMAQI
15th Jul 2026304 PMAQI
15th Jul 2026315 PMAQI
15th Jul 2026266 PMAQI
15th Jul 2026267 PMAQI
15th Jul 2026268 PMAQI
15th Jul 2026229 PMAQI
15th Jul 20262410 PMAQI
15th Jul 20262211 PMAQI
16th Jul 20262412 AMAQI
16th Jul 2026221 AMAQI
16th Jul 2026202 AMAQI
16th Jul 2026183 AMAQI
16th Jul 2026164 AMAQI

24°C14/33°C

16th Jul 2026165 AMAQI
16th Jul 2026166 AMAQI
16th Jul 2026177 AMAQI
16th Jul 2026198 AMAQI
16th Jul 2026209 AMAQI
16th Jul 20262610 AMAQI
16th Jul 20262711 AMAQI
16th Jul 20262912 PMAQI
16th Jul 2026291 PMAQI
16th Jul 2026282 PMAQI
16th Jul 2026323 PMAQI
16th Jul 2026324 PMAQI
16th Jul 2026325 PMAQI
16th Jul 2026306 PMAQI
16th Jul 2026287 PMAQI
16th Jul 2026268 PMAQI
16th Jul 2026279 PMAQI
16th Jul 20262210 PMAQI
16th Jul 20261411 PMAQI
17th Jul 20261212 AMAQI
17th Jul 2026151 AMAQI
17th Jul 2026192 AMAQI
17th Jul 2026253 AMAQI
17th Jul 2026194 AMAQI

23°C15/33°C

17th Jul 2026255 AMAQI
17th Jul 2026296 AMAQI
17th Jul 2026297 AMAQI
17th Jul 2026298 AMAQI
17th Jul 2026259 AMAQI
17th Jul 20262910 AMAQI
17th Jul 20262411 AMAQI
17th Jul 20263512 PMAQI
17th Jul 2026341 PMAQI
17th Jul 2026332 PMAQI
17th Jul 2026313 PMAQI
17th Jul 2026334 PMAQI
17th Jul 2026335 PMAQI
17th Jul 2026246 PMAQI
17th Jul 2026197 PMAQI
17th Jul 2026288 PMAQI
17th Jul 2026339 PMAQI
17th Jul 20263310 PMAQI
17th Jul 20263311 PMAQI
18th Jul 20263312 AMAQI
18th Jul 2026281 AMAQI
18th Jul 2026292 AMAQI
18th Jul 2026293 AMAQI
18th Jul 2026294 AMAQI

24°C15/32°C

18th Jul 2026295 AMAQI
18th Jul 2026296 AMAQI
18th Jul 2026297 AMAQI
18th Jul 2026298 AMAQI
18th Jul 2026299 AMAQI
18th Jul 20262910 AMAQI
18th Jul 20263311 AMAQI
18th Jul 20263312 PMAQI
18th Jul 2026291 PMAQI
18th Jul 2026422 PMAQI
18th Jul 2026423 PMAQI
18th Jul 2026424 PMAQI
18th Jul 2026405 PMAQI
18th Jul 2026406 PMAQI
18th Jul 2026387 PMAQI
18th Jul 2026338 PMAQI
18th Jul 2026339 PMAQI
18th Jul 20263610 PMAQI
18th Jul 20262511 PMAQI
19th Jul 20262912 AMAQI
19th Jul 2026311 AMAQI
19th Jul 2026292 AMAQI
19th Jul 2026293 AMAQI
19th Jul 2026334 AMAQI

25°C15/33°C

19th Jul 2026325 AMAQI
19th Jul 2026316 AMAQI
19th Jul 2026257 AMAQI
19th Jul 2026318 AMAQI
19th Jul 2026259 AMAQI
19th Jul 20262710 AMAQI
19th Jul 20263611 AMAQI
19th Jul 20263112 PMAQI
19th Jul 2026291 PMAQI
19th Jul 2026262 PMAQI
19th Jul 2026293 PMAQI
19th Jul 2026254 PMAQI
19th Jul 2026285 PMAQI
19th Jul 2026236 PMAQI
19th Jul 2026197 PMAQI
19th Jul 2026298 PMAQI
19th Jul 2026299 PMAQI
19th Jul 20262510 PMAQI
19th Jul 20262511 PMAQI
20th Jul 20262912 AMAQI
20th Jul 2026291 AMAQI
20th Jul 2026272 AMAQI
20th Jul 2026293 AMAQI
20th Jul 2026294 AMAQI

25°C15/35°C

20th Jul 2026275 AMAQI
20th Jul 2026256 AMAQI
20th Jul 2026277 AMAQI
20th Jul 2026258 AMAQI
20th Jul 2026319 AMAQI
20th Jul 20262310 AMAQI
20th Jul 20262911 AMAQI
20th Jul 20263812 PMAQI
20th Jul 2026441 PMAQI
20th Jul 2026462 PMAQI
20th Jul 2026423 PMAQI
20th Jul 2026424 PMAQI
20th Jul 2026335 PMAQI
20th Jul 2026336 PMAQI
20th Jul 2026387 PMAQI
20th Jul 2026448 PMAQI
20th Jul 20264010 PMAQI
20th Jul 20264211 PMAQI
21st Jul 20264612 AMAQI
21st Jul 2026421 AMAQI
21st Jul 2026382 AMAQI
21st Jul 2026403 AMAQI
21st Jul 2026334 AMAQI

26°C18/37°C

21st Jul 2026335 AMAQI
21st Jul 2026296 AMAQI
21st Jul 2026317 AMAQI
21st Jul 2026368 AMAQI
21st Jul 2026429 AMAQI
21st Jul 20264410 AMAQI
21st Jul 20264411 AMAQI
21st Jul 20264412 PMAQI
21st Jul 2026421 PMAQI
21st Jul 2026382 PMAQI
21st Jul 2026333 PMAQI
21st Jul 2026364 PMAQI
21st Jul 2026335 PMAQI
21st Jul 2026336 PMAQI
21st Jul 2026297 PMAQI
21st Jul 2026278 PMAQI
21st Jul 2026299 PMAQI
21st Jul 20263310 PMAQI
21st Jul 20262511 PMAQI
22nd Jul 20263112 AMAQI
22nd Jul 2026311 AMAQI
22nd Jul 2026252 AMAQI
22nd Jul 2026313 AMAQI
22nd Jul 2026294 AMAQI

26°C19/35°C

22nd Jul 2026295 AMAQI
22nd Jul 2026296 AMAQI
22nd Jul 2026297 AMAQI
22nd Jul 2026318 AMAQI
22nd Jul 2026339 AMAQI
22nd Jul 20263410 AMAQI
22nd Jul 20262911 AMAQI
22nd Jul 20262912 PMAQI
22nd Jul 2026251 PMAQI
22nd Jul 2026272 PMAQI
22nd Jul 2026233 PMAQI
22nd Jul 2026254 PMAQI
22nd Jul 2026255 PMAQI
22nd Jul 2026226 PMAQI
22nd Jul 2026247 PMAQI
22nd Jul 2026258 PMAQI
22nd Jul 2026279 PMAQI
22nd Jul 20263210 PMAQI
22nd Jul 20263811 PMAQI
23rd Jul 20263212 AMAQI
23rd Jul 2026341 AMAQI
23rd Jul 2026302 AMAQI
23rd Jul 2026293 AMAQI
23rd Jul 2026384 AMAQI

22°C16/32°C

23rd Jul 2026335 AMAQI
23rd Jul 2026336 AMAQI
23rd Jul 2026277 AMAQI
23rd Jul 2026338 AMAQI
23rd Jul 2026339 AMAQI
23rd Jul 20263310 AMAQI
23rd Jul 20263311 AMAQI
23rd Jul 20263312 PMAQI
23rd Jul 2026361 PMAQI
23rd Jul 2026312 PMAQI
23rd Jul 2026273 PMAQI
23rd Jul 2026274 PMAQI
23rd Jul 2026255 PMAQI
23rd Jul 2026176 PMAQI
23rd Jul 2026217 PMAQI
23rd Jul 2026258 PMAQI
23rd Jul 2026339 PMAQI
23rd Jul 20263110 PMAQI
23rd Jul 20263811 PMAQI
24th Jul 20263612 AMAQI
24th Jul 2026251 AMAQI
24th Jul 2026332 AMAQI
24th Jul 2026333 AMAQI
24th Jul 2026334 AMAQI

22°C16/29°C

24th Jul 2026335 AMAQI
24th Jul 2026296 AMAQI
24th Jul 2026337 AMAQI
24th Jul 2026298 AMAQI
24th Jul 2026319 AMAQI
24th Jul 20263110 AMAQI
24th Jul 20262911 AMAQI
24th Jul 20262912 PMAQI
24th Jul 2026311 PMAQI
24th Jul 2026332 PMAQI
24th Jul 2026333 PMAQI
24th Jul 2026314 PMAQI
24th Jul 2026335 PMAQI
24th Jul 2026276 PMAQI
24th Jul 2026297 PMAQI
24th Jul 2026388 PMAQI
24th Jul 2026299 PMAQI
24th Jul 20263110 PMAQI
24th Jul 20263311 PMAQI
25th Jul 20262912 AMAQI
25th Jul 2026291 AMAQI
25th Jul 2026332 AMAQI
25th Jul 2026333 AMAQI
25th Jul 2026324 AMAQI

25°C16/34°C

25th Jul 2026295 AMAQI
25th Jul 2026296 AMAQI
25th Jul 2026257 AMAQI
25th Jul 2026298 AMAQI
25th Jul 2026299 AMAQI
25th Jul 20262910 AMAQI
25th Jul 20264611 AMAQI
25th Jul 20263612 PMAQI
25th Jul 2026251 PMAQI
25th Jul 2026252 PMAQI
25th Jul 2026163 PMAQI
25th Jul 2026254 PMAQI
25th Jul 2026275 PMAQI
25th Jul 2026276 PMAQI
25th Jul 2026257 PMAQI
25th Jul 2026298 PMAQI
25th Jul 2026259 PMAQI
25th Jul 20262510 PMAQI
25th Jul 20262511 PMAQI
26th Jul 20262512 AMAQI
26th Jul 2026111 AMAQI
26th Jul 2026182 AMAQI
26th Jul 2026253 AMAQI
26th Jul 2026294 AMAQI

26°C18/36°C

26th Jul 2026255 AMAQI
26th Jul 2026296 AMAQI
26th Jul 2026297 AMAQI
26th Jul 2026298 AMAQI
26th Jul 2026299 AMAQI
26th Jul 20262910 AMAQI
26th Jul 20262711 AMAQI
26th Jul 20263112 PMAQI
26th Jul 2026291 PMAQI
26th Jul 2026252 PMAQI
26th Jul 2026213 PMAQI
26th Jul 2026124 PMAQI
26th Jul 2026295 PMAQI
26th Jul 2026196 PMAQI
26th Jul 2026277 PMAQI
26th Jul 2026298 PMAQI
26th Jul 2026299 PMAQI
26th Jul 20262910 PMAQI
26th Jul 20262911 PMAQI
27th Jul 20262912 AMAQI
27th Jul 2026291 AMAQI
27th Jul 2026272 AMAQI
27th Jul 2026123 AMAQI
27th Jul 2026144 AMAQI

27°C21/36°C

27th Jul 2026145 AMAQI
27th Jul 2026186 AMAQI
27th Jul 2026257 AMAQI
27th Jul 2026308 AMAQI
27th Jul 2026259 AMAQI
27th Jul 20262910 AMAQI
27th Jul 20262711 AMAQI
27th Jul 20263412 PMAQI
27th Jul 2026251 PMAQI
27th Jul 2026292 PMAQI
27th Jul 2026283 PMAQI
27th Jul 2026264 PMAQI
27th Jul 2026265 PMAQI
27th Jul 2026366 PMAQI
27th Jul 2026177 PMAQI
27th Jul 2026308 PMAQI
27th Jul 2026299 PMAQI
27th Jul 20262910 PMAQI
27th Jul 20262311 PMAQI
28th Jul 20263312 AMAQI
28th Jul 2026421 AMAQI
28th Jul 2026362 AMAQI
28th Jul 2026293 AMAQI
28th Jul 2026384 AMAQI

24°C19/32°C

28th Jul 2026255 AMAQI
28th Jul 2026346 AMAQI
28th Jul 2026307 AMAQI
28th Jul 2026428 AMAQI
28th Jul 2026259 AMAQI
28th Jul 20264210 AMAQI
28th Jul 20263111 AMAQI
28th Jul 20263412 PMAQI
28th Jul 2026441 PMAQI
28th Jul 2026422 PMAQI
28th Jul 2026313 PMAQI
28th Jul 2026314 PMAQI
28th Jul 2026315 PMAQI
28th Jul 2026426 PMAQI
28th Jul 2026237 PMAQI
28th Jul 2026298 PMAQI
28th Jul 2026299 PMAQI
28th Jul 20262910 PMAQI
28th Jul 20262911 PMAQI
29th Jul 20262912 AMAQI
29th Jul 2026311 AMAQI
29th Jul 2026312 AMAQI
29th Jul 2026363 AMAQI
29th Jul 2026424 AMAQI

22°C16/32°C

29th Jul 2026425 AMAQI
29th Jul 2026606 AMAQI
29th Jul 2026277 AMAQI
29th Jul 2026388 AMAQI
29th Jul 2026429 AMAQI
29th Jul 20264210 AMAQI
29th Jul 20262811 AMAQI
29th Jul 20262112 PMAQI
29th Jul 2026291 PMAQI
29th Jul 2026312 PMAQI
29th Jul 2026273 PMAQI
29th Jul 2026314 PMAQI
29th Jul 2026175 PMAQI
29th Jul 2026286 PMAQI
29th Jul 2026367 PMAQI
29th Jul 2026298 PMAQI
29th Jul 2026239 PMAQI
29th Jul 20263410 PMAQI
29th Jul 20265411 PMAQI
30th Jul 20264712 AMAQI
30th Jul 2026291 AMAQI
30th Jul 2026422 AMAQI
30th Jul 2026403 AMAQI
30th Jul 2026274 AMAQI

21°C16/31°C

30th Jul 2026255 AMAQI
30th Jul 2026206 AMAQI
30th Jul 2026257 AMAQI
30th Jul 2026278 AMAQI
30th Jul 2026279 AMAQI
30th Jul 20264510 AMAQI
30th Jul 20262311 AMAQI
30th Jul 20262112 PMAQI
30th Jul 2026251 PMAQI
30th Jul 2026262 PMAQI
30th Jul 2026253 PMAQI
30th Jul 2026294 PMAQI
30th Jul 2026295 PMAQI
30th Jul 2026296 PMAQI
30th Jul 2026297 PMAQI
30th Jul 2026298 PMAQI
30th Jul 2026299 PMAQI
30th Jul 20262910 PMAQI
30th Jul 20262911 PMAQI
31st Jul 20262912 AMAQI
31st Jul 2026251 AMAQI
31st Jul 2026272 AMAQI
31st Jul 2026233 AMAQI
31st Jul 2026274 AMAQI

24°C16/33°C

31st Jul 2026295 AMAQI
31st Jul 2026256 AMAQI
31st Jul 2026297 AMAQI
31st Jul 2026298 AMAQI
31st Jul 2026339 AMAQI
31st Jul 20262910 AMAQI
31st Jul 20262711 AMAQI
31st Jul 20262712 PMAQI
31st Jul 2026271 PMAQI
31st Jul 2026292 PMAQI
31st Jul 2026273 PMAQI
31st Jul 2026254 PMAQI
31st Jul 2026295 PMAQI
31st Jul 2026296 PMAQI
31st Jul 2026297 PMAQI
31st Jul 2026298 PMAQI
31st Jul 2026319 PMAQI
31st Jul 20262910 PMAQI
31st Jul 20262911 PMAQI
1st Aug 20262912 AMAQI
1st Aug 2026311 AMAQI
1st Aug 2026292 AMAQI
1st Aug 2026293 AMAQI
1st Aug 2026334 AMAQI

21°C15/32°C

1st Aug 2026335 AMAQI
1st Aug 2026316 AMAQI
1st Aug 2026297 AMAQI
1st Aug 2026318 AMAQI
1st Aug 2026319 AMAQI
1st Aug 20263110 AMAQI
1st Aug 20263111 AMAQI
1st Aug 20263312 PMAQI
1st Aug 2026331 PMAQI
1st Aug 2026312 PMAQI
1st Aug 2026313 PMAQI
1st Aug 2026294 PMAQI
1st Aug 2026255 PMAQI
1st Aug 2026276 PMAQI
1st Aug 2026257 PMAQI
1st Aug 2026258 PMAQI
1st Aug 2026259 PMAQI
1st Aug 20262710 PMAQI
1st Aug 20262511 PMAQI
2nd Aug 20262512 AMAQI
2nd Aug 2026251 AMAQI
2nd Aug 2026252 AMAQI
2nd Aug 2026293 AMAQI
2nd Aug 2026294 AMAQI

23°C14/33°C

2nd Aug 2026275 AMAQI
2nd Aug 2026296 AMAQI
2nd Aug 2026297 AMAQI
2nd Aug 2026278 AMAQI
2nd Aug 2026279 AMAQI
2nd Aug 20262710 AMAQI
2nd Aug 20262911 AMAQI
2nd Aug 20262912 PMAQI
2nd Aug 2026251 PMAQI
2nd Aug 2026252 PMAQI
2nd Aug 2026293 PMAQI
2nd Aug 2026254 PMAQI
2nd Aug 2026335 PMAQI
2nd Aug 2026296 PMAQI
2nd Aug 2026447 PMAQI
2nd Aug 2026428 PMAQI
2nd Aug 2026319 PMAQI
2nd Aug 20262910 PMAQI
2nd Aug 20262511 PMAQI
3rd Aug 20264212 AMAQI
3rd Aug 2026551 AMAQI
3rd Aug 2026562 AMAQI
3rd Aug 2026603 AMAQI
3rd Aug 2026644 AMAQI

27°C17/38°C

3rd Aug 2026665 AMAQI
3rd Aug 2026646 AMAQI
3rd Aug 2026627 AMAQI
3rd Aug 2026578 AMAQI
3rd Aug 2026599 AMAQI
3rd Aug 20265810 AMAQI
3rd Aug 20265311 AMAQI
3rd Aug 20265312 PMAQI
3rd Aug 2026521 PMAQI
3rd Aug 2026522 PMAQI
3rd Aug 2026513 PMAQI
3rd Aug 2026484 PMAQI
3rd Aug 2026525 PMAQI
3rd Aug 2026546 PMAQI
3rd Aug 2026577 PMAQI
3rd Aug 2026648 PMAQI
3rd Aug 2026719 PMAQI
3rd Aug 20267410 PMAQI
3rd Aug 20268511 PMAQI
4th Aug 20267412 AMAQI
4th Aug 2026681 AMAQI
4th Aug 2026622 AMAQI
4th Aug 2026623 AMAQI
4th Aug 2026624 AMAQI

26°C18/37°C

4th Aug 2026625 AMAQI
4th Aug 2026686 AMAQI
4th Aug 2026587 AMAQI
4th Aug 2026578 AMAQI
4th Aug 2026559 AMAQI
4th Aug 20265210 AMAQI
4th Aug 20265411 AMAQI
4th Aug 20265412 PMAQI
4th Aug 2026541 PMAQI
4th Aug 2026602 PMAQI
4th Aug 2026583 PMAQI
4th Aug 2026574 PMAQI
4th Aug 2026625 PMAQI
4th Aug 2026606 PMAQI
4th Aug 2026597 PMAQI
4th Aug 2026628 PMAQI
4th Aug 2026609 PMAQI
4th Aug 20266210 PMAQI
4th Aug 20265611 PMAQI
5th Aug 20265812 AMAQI
5th Aug 2026561 AMAQI
5th Aug 2026552 AMAQI
5th Aug 2026543 AMAQI
5th Aug 2026544 AMAQI

17°C12/24°C

5th Aug 2026535 AMAQI
5th Aug 2026526 AMAQI
5th Aug 2026527 AMAQI
5th Aug 2026518 AMAQI
5th Aug 2026529 AMAQI
5th Aug 20265210 AMAQI
5th Aug 20265011 AMAQI
5th Aug 20265212 PMAQI
5th Aug 2026511 PMAQI
5th Aug 2026542 PMAQI
5th Aug 2026543 PMAQI
5th Aug 2026544 PMAQI
5th Aug 2026535 PMAQI
5th Aug 2026526 PMAQI
5th Aug 2026517 PMAQI
5th Aug 2026518 PMAQI
5th Aug 2026509 PMAQI
5th Aug 20265210 PMAQI
5th Aug 20265111 PMAQI
6th Aug 20265112 AMAQI
6th Aug 2026461 AMAQI
6th Aug 2026512 AMAQI
6th Aug 2026493 AMAQI
6th Aug 2026494 AMAQI

19°C8/29°C

6th Aug 2026485 AMAQI
6th Aug 2026486 AMAQI
6th Aug 2026467 AMAQI
6th Aug 2026488 AMAQI
6th Aug 2026469 AMAQI
6th Aug 20264810 AMAQI
6th Aug 20264811 AMAQI
6th Aug 20264812 PMAQI
6th Aug 2026491 PMAQI
6th Aug 2026522 PMAQI
6th Aug 2026503 PMAQI
6th Aug 2026494 PMAQI
6th Aug 2026485 PMAQI
6th Aug 2026486 PMAQI
6th Aug 2026497 PMAQI
6th Aug 2026488 PMAQI
6th Aug 2026469 PMAQI
6th Aug 20265010 PMAQI
6th Aug 20265111 PMAQI
7th Aug 20265012 AMAQI
7th Aug 2026521 AMAQI
7th Aug 2026512 AMAQI
7th Aug 2026513 AMAQI
7th Aug 2026484 AMAQI

24°C13/35°C

7th Aug 2026495 AMAQI
7th Aug 2026486 AMAQI
7th Aug 2026497 AMAQI
7th Aug 2026488 AMAQI
7th Aug 2026539 AMAQI
7th Aug 20265310 AMAQI
7th Aug 20265311 AMAQI
7th Aug 20265412 PMAQI
7th Aug 2026551 PMAQI
7th Aug 2026532 PMAQI
7th Aug 2026533 PMAQI
7th Aug 2026524 PMAQI
7th Aug 2026545 PMAQI
7th Aug 2026566 PMAQI
7th Aug 2026557 PMAQI
7th Aug 2026528 PMAQI
7th Aug 2026579 PMAQI
7th Aug 20265410 PMAQI
7th Aug 20265411 PMAQI
8th Aug 20265712 AMAQI
8th Aug 2026571 AMAQI
8th Aug 2026522 AMAQI
8th Aug 2026543 AMAQI
8th Aug 2026584 AMAQI

25°C16/34°C

8th Aug 2026555 AMAQI
8th Aug 2026536 AMAQI
8th Aug 2026547 AMAQI
8th Aug 2026518 AMAQI
8th Aug 2026549 AMAQI
8th Aug 20265110 AMAQI
8th Aug 20265111 AMAQI
8th Aug 20264412 PMAQI
8th Aug 2026441 PMAQI
8th Aug 2026462 PMAQI
8th Aug 2026463 PMAQI
8th Aug 2026464 PMAQI
8th Aug 2026445 PMAQI
8th Aug 2026446 PMAQI
8th Aug 2026427 PMAQI
8th Aug 2026428 PMAQI
8th Aug 2026389 PMAQI
8th Aug 20263610 PMAQI
8th Aug 20263311 PMAQI
9th Aug 20263312 AMAQI
9th Aug 2026331 AMAQI
9th Aug 2026312 AMAQI
9th Aug 2026333 AMAQI
9th Aug 2026294 AMAQI

27°C17/37°C

9th Aug 2026295 AMAQI
9th Aug 2026296 AMAQI
9th Aug 2026297 AMAQI
9th Aug 2026298 AMAQI
9th Aug 2026299 AMAQI
9th Aug 20262910 AMAQI
9th Aug 20263111 AMAQI
9th Aug 20262912 PMAQI
9th Aug 2026291 PMAQI
9th Aug 2026292 PMAQI
9th Aug 2026313 PMAQI
9th Aug 2026334 PMAQI
9th Aug 2026335 PMAQI
9th Aug 2026336 PMAQI
9th Aug 2026337 PMAQI
9th Aug 2026338 PMAQI
9th Aug 2026369 PMAQI
9th Aug 20263310 PMAQI
9th Aug 20263311 PMAQI
10th Aug 20263312 AMAQI
10th Aug 2026361 AMAQI
10th Aug 2026332 AMAQI
10th Aug 2026363 AMAQI
10th Aug 2026384 AMAQI

26°C18/35°C

10th Aug 2026385 AMAQI
10th Aug 2026386 AMAQI
10th Aug 2026387 AMAQI
10th Aug 2026388 AMAQI
10th Aug 2026389 AMAQI
10th Aug 20264210 AMAQI
10th Aug 20264011 AMAQI
10th Aug 20264612 PMAQI
10th Aug 2026501 PMAQI
10th Aug 2026402 PMAQI
10th Aug 2026403 PMAQI
10th Aug 2026364 PMAQI
10th Aug 2026335 PMAQI
10th Aug 2026336 PMAQI
10th Aug 2026337 PMAQI
10th Aug 2026318 PMAQI
10th Aug 2026299 PMAQI
10th Aug 20262910 PMAQI
10th Aug 20263111 PMAQI
11th Aug 20263312 AMAQI
11th Aug 2026311 AMAQI
11th Aug 2026312 AMAQI
11th Aug 2026293 AMAQI
11th Aug 2026294 AMAQI

24°C17/33°C

11th Aug 2026295 AMAQI
5 AM
11th Aug 2026276 AMAQI
11th Aug 2026337 AMAQI
11th Aug 2026278 AMAQI
11th Aug 2026299 AMAQI
11th Aug 20263010 AMAQI
11th Aug 20262911 AMAQI
11th Aug 20262912 PMAQI
12 PM
11th Aug 2026311 PMAQI
11th Aug 2026292 PMAQI
11th Aug 2026313 PMAQI
11th Aug 2026334 PMAQI
11th Aug 2026295 PMAQI
11th Aug 2026296 PMAQI
11th Aug 2026317 PMAQI
11th Aug 2026298 PMAQI
8 PM
11th Aug 2026279 PMAQI
11th Aug 20262510 PMAQI
11th Aug 20262311 PMAQI
12 AM
4 AM

25°C17/34°C

Day time
Avg. Highest Time
8 AM - 8 PM

34AQI

13 hours / Day
390 hours / Month
Avg. Lowest Time
7 AM

32AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 AM to 8 PM (Avg. 34), while the lowest AQI was between 7 AM to 7 AM (Avg. 32).
Night time
Avg. Highest Time
12 AM - 11 PM

34AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
1 AM - 3 AM

33AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 34), while the lowest AQI was between 1 AM to 3 AM (Avg. 33).

2026 Days Vs Air Quality

Athens, Boulder, Colorado, United States

2026

98%

216

2%

4

Total number of days with different AQI categories in last 223 days in 2026 (142 days remaining)

Good
216 Days
Moderate
4 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 98%

Health Risk Level:

Very Low

In 2026, 98% of 223 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

Athens, Boulder, 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
21AQI (US)
2nd January 2026
26AQI (US)
3rd January 2026
28AQI (US)
4th January 2026
19AQI (US)
5th January 2026
23AQI (US)
6th January 2026
16AQI (US)
7th January 2026
16AQI (US)
8th January 2026
17AQI (US)
9th January 2026
18AQI (US)
10th January 2026
15AQI (US)
11th January 2026
15AQI (US)
12th January 2026
29AQI (US)
13th January 2026
22AQI (US)
14th January 2026
13AQI (US)
15th January 2026
20AQI (US)
16th January 2026
22AQI (US)
17th January 2026
12AQI (US)
18th January 2026
14AQI (US)
19th January 2026
21AQI (US)
20th January 2026
37AQI (US)
21st January 2026
19AQI (US)
22nd January 2026
24AQI (US)
23rd January 2026
22AQI (US)
24th January 2026
29AQI (US)
25th January 2026
21AQI (US)
26th January 2026
28AQI (US)
27th January 2026
22AQI (US)
28th January 2026
28AQI (US)
29th January 2026
30AQI (US)
30th January 2026
32AQI (US)
31st January 2026
24AQI (US)
1st February 2026
21AQI (US)
2nd February 2026
24AQI (US)
3rd February 2026
20AQI (US)
4th February 2026
29AQI (US)
5th February 2026
21AQI (US)
6th February 2026
20AQI (US)
7th February 2026
21AQI (US)
8th February 2026
27AQI (US)
9th February 2026
25AQI (US)
10th February 2026
22AQI (US)
11th February 2026
22AQI (US)
12th February 2026
25AQI (US)
13th February 2026
20AQI (US)
14th February 2026
27AQI (US)
15th February 2026
21AQI (US)
16th February 2026
21AQI (US)
17th February 2026
28AQI (US)
18th February 2026
19AQI (US)
19th February 2026
24AQI (US)
20th February 2026
18AQI (US)
21st February 2026
17AQI (US)
22nd February 2026
18AQI (US)
23rd February 2026
22AQI (US)
24th February 2026
30AQI (US)
25th February 2026
26AQI (US)
26th February 2026
18AQI (US)
27th February 2026
19AQI (US)
28th February 2026
18AQI (US)
1st March 2026
22AQI (US)
2nd March 2026
30AQI (US)
3rd March 2026
16AQI (US)
4th March 2026
19AQI (US)
5th March 2026
19AQI (US)
6th March 2026
29AQI (US)
7th March 2026
26AQI (US)
8th March 2026
27AQI (US)
9th March 2026
24AQI (US)
10th March 2026
20AQI (US)
11th March 2026
19AQI (US)
12th March 2026
28AQI (US)
13th March 2026
19AQI (US)
14th March 2026
31AQI (US)
15th March 2026
19AQI (US)
16th March 2026
22AQI (US)
17th March 2026
19AQI (US)
18th March 2026
22AQI (US)
19th March 2026
16AQI (US)
20th March 2026
21AQI (US)
21st March 2026
17AQI (US)
22nd March 2026
24AQI (US)
23rd March 2026
21AQI (US)
24th March 2026
21AQI (US)
25th March 2026
18AQI (US)
26th March 2026
33AQI (US)
27th March 2026
25AQI (US)
28th March 2026
20AQI (US)
29th March 2026
20AQI (US)
30th March 2026
22AQI (US)
31st March 2026
28AQI (US)
1st April 2026
27AQI (US)
2nd April 2026
19AQI (US)
3rd April 2026
25AQI (US)
4th April 2026
17AQI (US)
5th April 2026
20AQI (US)
6th April 2026
22AQI (US)
7th April 2026
28AQI (US)
8th April 2026
29AQI (US)
9th April 2026
24AQI (US)
10th April 2026
27AQI (US)
11th April 2026
19AQI (US)
12th April 2026
16AQI (US)
13th April 2026
16AQI (US)
14th April 2026
17AQI (US)
15th April 2026
23AQI (US)
16th April 2026
21AQI (US)
17th April 2026
18th April 2026
21AQI (US)
19th April 2026
17AQI (US)
20th April 2026
20AQI (US)
21st April 2026
19AQI (US)
22nd April 2026
23rd April 2026
34AQI (US)
24th April 2026
21AQI (US)
25th April 2026
17AQI (US)
26th April 2026
17AQI (US)
27th April 2026
15AQI (US)
28th April 2026
19AQI (US)
29th April 2026
14AQI (US)
30th April 2026
17AQI (US)
1st May 2026
15AQI (US)
2nd May 2026
13AQI (US)
3rd May 2026
13AQI (US)
4th May 2026
21AQI (US)
5th May 2026
25AQI (US)
6th May 2026
22AQI (US)
7th May 2026
14AQI (US)
8th May 2026
18AQI (US)
9th May 2026
10th May 2026
25AQI (US)
11th May 2026
16AQI (US)
12th May 2026
25AQI (US)
13th May 2026
31AQI (US)
14th May 2026
29AQI (US)
15th May 2026
26AQI (US)
16th May 2026
21AQI (US)
17th May 2026
17AQI (US)
18th May 2026
32AQI (US)
19th May 2026
28AQI (US)
20th May 2026
17AQI (US)
21st May 2026
19AQI (US)
22nd May 2026
19AQI (US)
23rd May 2026
24AQI (US)
24th May 2026
17AQI (US)
25th May 2026
17AQI (US)
26th May 2026
17AQI (US)
27th May 2026
14AQI (US)
28th May 2026
18AQI (US)
29th May 2026
16AQI (US)
30th May 2026
13AQI (US)
31st May 2026
15AQI (US)
1st June 2026
16AQI (US)
2nd June 2026
16AQI (US)
3rd June 2026
18AQI (US)
4th June 2026
18AQI (US)
5th June 2026
25AQI (US)
6th June 2026
21AQI (US)
7th June 2026
21AQI (US)
8th June 2026
25AQI (US)
9th June 2026
20AQI (US)
10th June 2026
33AQI (US)
11th June 2026
27AQI (US)
12th June 2026
24AQI (US)
13th June 2026
22AQI (US)
14th June 2026
21AQI (US)
15th June 2026
20AQI (US)
16th June 2026
21AQI (US)
17th June 2026
30AQI (US)
18th June 2026
28AQI (US)
19th June 2026
34AQI (US)
20th June 2026
36AQI (US)
21st June 2026
23AQI (US)
22nd June 2026
22AQI (US)
23rd June 2026
34AQI (US)
24th June 2026
22AQI (US)
25th June 2026
16AQI (US)
26th June 2026
13AQI (US)
27th June 2026
15AQI (US)
28th June 2026
44AQI (US)
29th June 2026
27AQI (US)
30th June 2026
30AQI (US)
1st July 2026
40AQI (US)
2nd July 2026
34AQI (US)
3rd July 2026
36AQI (US)
4th July 2026
24AQI (US)
5th July 2026
23AQI (US)
6th July 2026
36AQI (US)
7th July 2026
39AQI (US)
8th July 2026
22AQI (US)
9th July 2026
13AQI (US)
10th July 2026
14AQI (US)
11th July 2026
12AQI (US)
12th July 2026
13AQI (US)
13th July 2026
20AQI (US)
14th July 2026
22AQI (US)
15th July 2026
22AQI (US)
16th July 2026
24AQI (US)
17th July 2026
27AQI (US)
18th July 2026
33AQI (US)
19th July 2026
28AQI (US)
20th July 2026
34AQI (US)
21st July 2026
36AQI (US)
22nd July 2026
28AQI (US)
23rd July 2026
30AQI (US)
24th July 2026
31AQI (US)
25th July 2026
28AQI (US)
26th July 2026
26AQI (US)
27th July 2026
25AQI (US)
28th July 2026
33AQI (US)
29th July 2026
34AQI (US)
30th July 2026
29AQI (US)
31st July 2026
28AQI (US)
1st August 2026
29AQI (US)
2nd August 2026
29AQI (US)
3rd August 2026
59AQI (US)
4th August 2026
60AQI (US)
5th August 2026
53AQI (US)
6th August 2026
49AQI (US)
7th August 2026
52AQI (US)
8th August 2026
48AQI (US)
9th August 2026
31AQI (US)
10th August 2026
37AQI (US)
11th August 2026
29AQI (US)
12th August 2026
13th August 2026
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

22AQI (US)

22AQI (US)

22AQI (US)

21AQI (US)

20AQI (US)

24AQI (US)

27AQI (US)

43AQI (US)

No. of days

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

202624AQI (US)

31
28
31
28
30
30
31
7
4
216
4

Highest AQI (US) recorded in

August

43AQI (US)

Lowest AQI (US) recorded in

May

20AQI (US)

202528AQI (US)

31
28
31
30
31
30
29
2
26
5
25
5
31
30
31
353
12

Highest AQI (US) recorded in

August

41AQI (US)

Lowest AQI (US) recorded in

March

19AQI (US)

202424AQI (US)

30
1
29
31
30
31
30
26
5
29
2
29
1
28
3
30
31
354
12

Highest AQI (US) recorded in

July

34AQI (US)

Lowest AQI (US) recorded in

May

17AQI (US)

202326AQI (US)

26
2
24
2
31
29
1
26
3
1
30
31
17
5
30
30
1
28
31
333
14
1

Highest AQI (US) recorded in

May

35AQI (US)

Lowest AQI (US) recorded in

December

14AQI (US)

202227AQI (US)

29
1
21
1
30
1
14
2
1
31
27
3
21
2
26
3
31
30
30
292
11
1

Highest AQI (US) recorded in

April

35AQI (US)

Lowest AQI (US) recorded in

November

23AQI (US)

202133AQI (US)

28
2
22
6
27
4
24
3
28
20
6
20
10
14
16
1
24
6
31
29
1
30
1
297
55
1

Highest AQI (US) recorded in

August

55AQI (US)

Lowest AQI (US) recorded in

May

22AQI (US)

202036AQI (US)

3
3
5
1
13
5
25
2
29
1
20
8
19
10
20
10
1
29
30
1
193
41
1

Highest AQI (US) recorded in

March

56AQI (US)

Lowest AQI (US) recorded in

November

24AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2020(Avg.)
36AQI (US)
Least Polluted Year Recorded
2024(Avg.)
24AQI (US)

Athens's annual 2026 AQI (US) (24) shows an average percentage change of -15.6% (improved AQI (US)) compared to previous years: 2020 (36), 2021 (33), 2022 (27), 2023 (26), 2024 (24), 2025 (28).