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HistoryAQIPM2.5PM10COSO2NO2O3

University Of California Davis, California, 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

University Of California Davis, California, United States

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
28th Aug 2021
155AQI
Lowest AQI recorded on
1st Aug 2022
10AQI

Same Day Analysis (16th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 17 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 15th Aug - 16th Aug 2025

University Of California Davis, California, United States

AQI
Day
Night
.

6 AM15th Aug 2025

8 PM

5 AM16th Aug 2025

Day time
Avg. Highest Time
1PM15th Aug

53AQI

Avg. Lowest Time
6AM15th Aug

30AQI

Night time
Avg. Highest Time
9PM15th Aug

37AQI

Avg. Lowest Time
3AM16th Aug

17AQI

In the last 24 hours,

University Of California Davis's AQI reached its highest point of 53 at 1 PM during the Day, while the lowest point, 17, was recorded at 3 AM during the Night between 15th Aug and 16th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

University Of California Davis, California, United States

JulAug
17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th
Day
Night
17th Jul 2025306 AMAQI
17th Jul 2025297 AMAQI
17th Jul 2025308 AMAQI
17th Jul 2025309 AMAQI
17th Jul 20252810 AMAQI
17th Jul 20253011 AMAQI
17th Jul 20253012 PMAQI
17th Jul 2025301 PMAQI
17th Jul 2025292 PMAQI
17th Jul 2025243 PMAQI
17th Jul 2025254 PMAQI
17th Jul 2025295 PMAQI
17th Jul 2025286 PMAQI
17th Jul 2025257 PMAQI
17th Jul 2025248 PMAQI
17th Jul 2025249 PMAQI
17th Jul 20252410 PMAQI
17th Jul 20252311 PMAQI
18th Jul 20252412 AMAQI
18th Jul 2025241 AMAQI
18th Jul 2025222 AMAQI
18th Jul 2025243 AMAQI
18th Jul 2025224 AMAQI
18th Jul 2025195 AMAQI

--°C/°C

18th Jul 2025246 AMAQI
18th Jul 2025247 AMAQI
18th Jul 2025238 AMAQI
18th Jul 2025229 AMAQI
18th Jul 20252410 AMAQI
18th Jul 20252711 AMAQI
18th Jul 20252712 PMAQI
18th Jul 2025321 PMAQI
18th Jul 2025342 PMAQI
18th Jul 2025313 PMAQI
18th Jul 2025304 PMAQI
18th Jul 2025285 PMAQI
18th Jul 2025266 PMAQI
18th Jul 2025237 PMAQI
18th Jul 2025248 PMAQI
18th Jul 2025269 PMAQI
18th Jul 20252510 PMAQI
18th Jul 20252411 PMAQI
19th Jul 20252412 AMAQI
19th Jul 2025221 AMAQI
19th Jul 2025232 AMAQI
19th Jul 2025263 AMAQI
19th Jul 2025284 AMAQI
19th Jul 2025265 AMAQI

24°C12/38°C

19th Jul 2025266 AMAQI
19th Jul 2025257 AMAQI
19th Jul 2025218 AMAQI
19th Jul 2025219 AMAQI
19th Jul 20252110 AMAQI
19th Jul 20252111 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025241 PMAQI
19th Jul 2025272 PMAQI
19th Jul 2025283 PMAQI
19th Jul 2025274 PMAQI
19th Jul 2025265 PMAQI
19th Jul 2025276 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025248 PMAQI
19th Jul 2025229 PMAQI
19th Jul 20252110 PMAQI
19th Jul 20252011 PMAQI
20th Jul 20252112 AMAQI
20th Jul 2025221 AMAQI
20th Jul 2025212 AMAQI
20th Jul 2025203 AMAQI
20th Jul 2025224 AMAQI
20th Jul 2025275 AMAQI

23°C12/38°C

20th Jul 2025266 AMAQI
20th Jul 2025197 AMAQI
20th Jul 2025198 AMAQI
20th Jul 2025179 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20251812 PMAQI
20th Jul 2025171 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025233 PMAQI
20th Jul 2025214 PMAQI
20th Jul 2025215 PMAQI
20th Jul 2025226 PMAQI
20th Jul 2025217 PMAQI
20th Jul 2025238 PMAQI
20th Jul 2025269 PMAQI
20th Jul 20252610 PMAQI
20th Jul 20252811 PMAQI
21st Jul 20253212 AMAQI
21st Jul 2025321 AMAQI
21st Jul 2025292 AMAQI
21st Jul 2025283 AMAQI
21st Jul 2025284 AMAQI
21st Jul 2025345 AMAQI

22°C12/36°C

21st Jul 2025326 AMAQI
21st Jul 2025337 AMAQI
21st Jul 2025328 AMAQI
21st Jul 2025359 AMAQI
21st Jul 20253210 AMAQI
21st Jul 20253011 AMAQI
21st Jul 20252412 PMAQI
21st Jul 2025221 PMAQI
21st Jul 2025222 PMAQI
21st Jul 2025223 PMAQI
21st Jul 2025224 PMAQI
21st Jul 2025235 PMAQI
21st Jul 2025216 PMAQI
21st Jul 2025297 PMAQI
21st Jul 2025308 PMAQI
21st Jul 2025299 PMAQI
21st Jul 20252810 PMAQI
21st Jul 20252711 PMAQI
22nd Jul 20252712 AMAQI
22nd Jul 2025251 AMAQI
22nd Jul 2025222 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025124 AMAQI
22nd Jul 2025125 AMAQI

21°C13/31°C

22nd Jul 2025126 AMAQI
22nd Jul 2025137 AMAQI
22nd Jul 2025138 AMAQI
22nd Jul 2025149 AMAQI
22nd Jul 20251910 AMAQI
22nd Jul 20252211 AMAQI
22nd Jul 20252412 PMAQI
22nd Jul 2025201 PMAQI
22nd Jul 2025192 PMAQI
22nd Jul 2025223 PMAQI
22nd Jul 2025204 PMAQI
22nd Jul 2025205 PMAQI
22nd Jul 2025196 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025189 PMAQI
22nd Jul 20251810 PMAQI
22nd Jul 20251911 PMAQI
23rd Jul 20251812 AMAQI
23rd Jul 2025161 AMAQI
23rd Jul 2025162 AMAQI
23rd Jul 2025163 AMAQI
23rd Jul 2025134 AMAQI
23rd Jul 2025185 AMAQI

20°C14/30°C

23rd Jul 2025156 AMAQI
23rd Jul 2025167 AMAQI
23rd Jul 2025178 AMAQI
23rd Jul 2025189 AMAQI
23rd Jul 20251710 AMAQI
23rd Jul 20251711 AMAQI
23rd Jul 20251612 PMAQI
23rd Jul 2025161 PMAQI
23rd Jul 2025162 PMAQI
23rd Jul 2025163 PMAQI
23rd Jul 2025164 PMAQI
23rd Jul 2025165 PMAQI
23rd Jul 2025166 PMAQI
23rd Jul 2025167 PMAQI
23rd Jul 2025188 PMAQI
23rd Jul 2025159 PMAQI
23rd Jul 20251510 PMAQI
23rd Jul 20251611 PMAQI
24th Jul 20251812 AMAQI
24th Jul 2025181 AMAQI
24th Jul 2025172 AMAQI
24th Jul 2025153 AMAQI
24th Jul 2025154 AMAQI
24th Jul 2025175 AMAQI

21°C12/33°C

24th Jul 2025176 AMAQI
24th Jul 2025167 AMAQI
24th Jul 2025168 AMAQI
24th Jul 2025149 AMAQI
24th Jul 20251610 AMAQI
24th Jul 20251511 AMAQI
24th Jul 20251712 PMAQI
24th Jul 2025221 PMAQI
24th Jul 2025272 PMAQI
24th Jul 2025223 PMAQI
24th Jul 2025204 PMAQI
24th Jul 2025185 PMAQI
24th Jul 2025166 PMAQI
24th Jul 2025167 PMAQI
24th Jul 2025168 PMAQI
24th Jul 2025169 PMAQI
24th Jul 20251710 PMAQI
24th Jul 20252011 PMAQI
25th Jul 20252012 AMAQI
25th Jul 2025191 AMAQI
25th Jul 2025172 AMAQI
25th Jul 2025173 AMAQI
25th Jul 2025174 AMAQI
25th Jul 2025155 AMAQI

22°C11/34°C

25th Jul 2025126 AMAQI
25th Jul 2025147 AMAQI
25th Jul 2025148 AMAQI
25th Jul 2025159 AMAQI
25th Jul 20251410 AMAQI
25th Jul 20251611 AMAQI
25th Jul 20252012 PMAQI
25th Jul 2025171 PMAQI
25th Jul 2025152 PMAQI
25th Jul 2025163 PMAQI
25th Jul 2025164 PMAQI
25th Jul 2025165 PMAQI
25th Jul 2025176 PMAQI
25th Jul 2025187 PMAQI
25th Jul 2025188 PMAQI
25th Jul 2025179 PMAQI
25th Jul 20251710 PMAQI
25th Jul 20251611 PMAQI
26th Jul 20251712 AMAQI
26th Jul 2025171 AMAQI
26th Jul 2025172 AMAQI
26th Jul 2025153 AMAQI
26th Jul 2025144 AMAQI
26th Jul 2025165 AMAQI

21°C13/33°C

26th Jul 2025146 AMAQI
26th Jul 2025137 AMAQI
26th Jul 2025138 AMAQI
26th Jul 2025149 AMAQI
26th Jul 20252010 AMAQI
26th Jul 20252111 AMAQI
26th Jul 20252212 PMAQI
26th Jul 2025191 PMAQI
26th Jul 2025152 PMAQI
26th Jul 2025163 PMAQI
26th Jul 2025154 PMAQI
26th Jul 2025145 PMAQI
26th Jul 2025156 PMAQI
26th Jul 2025167 PMAQI
26th Jul 2025168 PMAQI
26th Jul 2025149 PMAQI
26th Jul 20251510 PMAQI
26th Jul 20251811 PMAQI
27th Jul 20251912 AMAQI
27th Jul 2025171 AMAQI
27th Jul 2025162 AMAQI
27th Jul 2025153 AMAQI
27th Jul 2025144 AMAQI
27th Jul 2025145 AMAQI

21°C13/33°C

27th Jul 2025146 AMAQI
27th Jul 2025157 AMAQI
27th Jul 2025148 AMAQI
27th Jul 2025139 AMAQI
27th Jul 20251410 AMAQI
27th Jul 20251411 AMAQI
27th Jul 20251412 PMAQI
27th Jul 2025141 PMAQI
27th Jul 2025142 PMAQI
27th Jul 2025163 PMAQI
27th Jul 2025164 PMAQI
27th Jul 2025175 PMAQI
27th Jul 2025166 PMAQI
27th Jul 2025157 PMAQI
27th Jul 2025158 PMAQI
27th Jul 2025179 PMAQI
27th Jul 20251810 PMAQI
27th Jul 20251811 PMAQI
28th Jul 20251812 AMAQI
28th Jul 2025181 AMAQI
28th Jul 2025182 AMAQI
28th Jul 2025173 AMAQI
28th Jul 2025184 AMAQI
28th Jul 2025215 AMAQI

22°C13/34°C

28th Jul 2025236 AMAQI
28th Jul 2025217 AMAQI
28th Jul 2025218 AMAQI
28th Jul 2025189 AMAQI
28th Jul 20252010 AMAQI
28th Jul 20252411 AMAQI
28th Jul 20252312 PMAQI
28th Jul 2025211 PMAQI
28th Jul 2025212 PMAQI
28th Jul 2025223 PMAQI
28th Jul 2025234 PMAQI
28th Jul 2025235 PMAQI
28th Jul 2025246 PMAQI
28th Jul 2025227 PMAQI
28th Jul 2025228 PMAQI
28th Jul 2025249 PMAQI
28th Jul 20252410 PMAQI
28th Jul 20252311 PMAQI
29th Jul 20252212 AMAQI
29th Jul 2025231 AMAQI
29th Jul 2025262 AMAQI
29th Jul 2025283 AMAQI
29th Jul 2025324 AMAQI
29th Jul 2025305 AMAQI

25°C13/38°C

29th Jul 2025286 AMAQI
29th Jul 2025287 AMAQI
29th Jul 2025258 AMAQI
29th Jul 2025289 AMAQI
29th Jul 20253110 AMAQI
29th Jul 20253011 AMAQI
29th Jul 20253012 PMAQI
29th Jul 2025321 PMAQI
29th Jul 2025332 PMAQI
29th Jul 2025363 PMAQI
29th Jul 2025354 PMAQI
29th Jul 2025365 PMAQI
29th Jul 2025366 PMAQI
29th Jul 2025317 PMAQI
29th Jul 2025308 PMAQI
29th Jul 2025319 PMAQI
29th Jul 20252810 PMAQI
29th Jul 20253111 PMAQI
30th Jul 20253012 AMAQI
30th Jul 2025271 AMAQI
30th Jul 2025262 AMAQI
30th Jul 2025273 AMAQI
30th Jul 2025284 AMAQI
30th Jul 2025325 AMAQI

25°C13/40°C

30th Jul 2025316 AMAQI
30th Jul 2025287 AMAQI
30th Jul 2025238 AMAQI
30th Jul 2025199 AMAQI
30th Jul 20252110 AMAQI
30th Jul 20252311 AMAQI
30th Jul 20252512 PMAQI
30th Jul 2025281 PMAQI
30th Jul 2025292 PMAQI
30th Jul 2025293 PMAQI
30th Jul 2025294 PMAQI
30th Jul 2025295 PMAQI
30th Jul 2025296 PMAQI
30th Jul 2025297 PMAQI
30th Jul 2025298 PMAQI
30th Jul 2025299 PMAQI
30th Jul 20253010 PMAQI
30th Jul 20253011 PMAQI
31st Jul 20253112 AMAQI
31st Jul 2025311 AMAQI
31st Jul 2025322 AMAQI
31st Jul 2025303 AMAQI
31st Jul 2025324 AMAQI
31st Jul 2025385 AMAQI

22°C13/36°C

31st Jul 2025326 AMAQI
31st Jul 2025267 AMAQI
31st Jul 2025258 AMAQI
31st Jul 2025269 AMAQI
31st Jul 20253010 AMAQI
31st Jul 20253011 AMAQI
31st Jul 20253412 PMAQI
31st Jul 2025361 PMAQI
31st Jul 2025412 PMAQI
31st Jul 2025423 PMAQI
31st Jul 2025474 PMAQI
31st Jul 2025485 PMAQI
31st Jul 2025476 PMAQI
31st Jul 2025367 PMAQI
31st Jul 2025378 PMAQI
31st Jul 2025409 PMAQI
31st Jul 20254210 PMAQI
31st Jul 20253611 PMAQI
1st Aug 20253512 AMAQI
1st Aug 2025351 AMAQI
1st Aug 2025342 AMAQI
1st Aug 2025343 AMAQI
1st Aug 2025344 AMAQI
1st Aug 2025345 AMAQI

25°C13/40°C

1st Aug 2025306 AMAQI
1st Aug 2025267 AMAQI
1st Aug 2025288 AMAQI
1st Aug 2025249 AMAQI
1st Aug 20252210 AMAQI
1st Aug 20252311 AMAQI
1st Aug 20252712 PMAQI
1st Aug 2025261 PMAQI
1st Aug 2025322 PMAQI
1st Aug 2025413 PMAQI
1st Aug 2025444 PMAQI
1st Aug 2025445 PMAQI
1st Aug 2025426 PMAQI
1st Aug 2025367 PMAQI
1st Aug 2025358 PMAQI
1st Aug 2025309 PMAQI
1st Aug 20252610 PMAQI
1st Aug 20252811 PMAQI
2nd Aug 20252812 AMAQI
2nd Aug 2025321 AMAQI
2nd Aug 2025372 AMAQI
2nd Aug 2025363 AMAQI
2nd Aug 2025424 AMAQI
2nd Aug 2025385 AMAQI

25°C13/39°C

2nd Aug 2025276 AMAQI
2nd Aug 2025277 AMAQI
2nd Aug 2025288 AMAQI
2nd Aug 2025269 AMAQI
2nd Aug 20252410 AMAQI
2nd Aug 20252811 AMAQI
2nd Aug 20253012 PMAQI
2nd Aug 2025301 PMAQI
2nd Aug 2025322 PMAQI
2nd Aug 2025333 PMAQI
2nd Aug 2025384 PMAQI
2nd Aug 2025415 PMAQI
2nd Aug 2025446 PMAQI
2nd Aug 2025357 PMAQI
2nd Aug 2025328 PMAQI
2nd Aug 2025309 PMAQI
2nd Aug 20253010 PMAQI
2nd Aug 20252711 PMAQI
3rd Aug 20252712 AMAQI
3rd Aug 2025261 AMAQI
3rd Aug 2025262 AMAQI
3rd Aug 2025283 AMAQI
3rd Aug 2025264 AMAQI
3rd Aug 2025335 AMAQI

24°C12/39°C

3rd Aug 2025386 AMAQI
3rd Aug 2025387 AMAQI
3rd Aug 2025358 AMAQI
3rd Aug 2025389 AMAQI
3rd Aug 20254610 AMAQI
3rd Aug 20255011 AMAQI
3rd Aug 20255112 PMAQI
3rd Aug 2025501 PMAQI
3rd Aug 2025562 PMAQI
3rd Aug 2025523 PMAQI
3rd Aug 2025504 PMAQI
3rd Aug 2025445 PMAQI
3rd Aug 2025436 PMAQI
3rd Aug 2025387 PMAQI
3rd Aug 2025408 PMAQI
3rd Aug 2025469 PMAQI
3rd Aug 20254410 PMAQI
3rd Aug 20254011 PMAQI
4th Aug 20254212 AMAQI
4th Aug 2025501 AMAQI
4th Aug 2025522 AMAQI
4th Aug 2025413 AMAQI
4th Aug 2025354 AMAQI
4th Aug 2025345 AMAQI

24°C12/38°C

4th Aug 2025356 AMAQI
4th Aug 2025337 AMAQI
4th Aug 2025348 AMAQI
4th Aug 2025329 AMAQI
4th Aug 20253610 AMAQI
4th Aug 20254011 AMAQI
4th Aug 20254512 PMAQI
4th Aug 2025411 PMAQI
4th Aug 2025382 PMAQI
4th Aug 2025383 PMAQI
4th Aug 2025354 PMAQI
4th Aug 2025365 PMAQI
4th Aug 2025386 PMAQI
4th Aug 2025367 PMAQI
4th Aug 2025358 PMAQI
4th Aug 2025319 PMAQI
4th Aug 20253210 PMAQI
4th Aug 20252711 PMAQI
5th Aug 20252612 AMAQI
5th Aug 2025261 AMAQI
5th Aug 2025332 AMAQI
5th Aug 2025413 AMAQI
5th Aug 2025354 AMAQI
5th Aug 2025345 AMAQI

23°C11/37°C

5th Aug 2025286 AMAQI
5th Aug 2025247 AMAQI
5th Aug 2025248 AMAQI
5th Aug 2025319 AMAQI
5th Aug 20253910 AMAQI
5th Aug 20253811 AMAQI
5th Aug 20253612 PMAQI
5th Aug 2025381 PMAQI
5th Aug 2025322 PMAQI
5th Aug 2025323 PMAQI
5th Aug 2025364 PMAQI
5th Aug 2025415 PMAQI
5th Aug 2025446 PMAQI
5th Aug 2025317 PMAQI
5th Aug 2025348 PMAQI
5th Aug 2025339 PMAQI
5th Aug 20253410 PMAQI
5th Aug 20253211 PMAQI
6th Aug 20252912 AMAQI
6th Aug 2025291 AMAQI
6th Aug 2025302 AMAQI
6th Aug 2025333 AMAQI
6th Aug 2025364 AMAQI
6th Aug 2025355 AMAQI

23°C10/36°C

6th Aug 2025336 AMAQI
6th Aug 2025347 AMAQI
6th Aug 2025368 AMAQI
6th Aug 2025369 AMAQI
6th Aug 20254110 AMAQI
6th Aug 20254411 AMAQI
6th Aug 20254712 PMAQI
6th Aug 2025501 PMAQI
6th Aug 2025462 PMAQI
6th Aug 2025463 PMAQI
6th Aug 2025454 PMAQI
6th Aug 2025375 PMAQI
6th Aug 2025326 PMAQI
6th Aug 2025357 PMAQI
6th Aug 2025308 PMAQI
6th Aug 2025289 PMAQI
6th Aug 20252910 PMAQI
6th Aug 20253711 PMAQI
7th Aug 20254112 AMAQI
7th Aug 2025401 AMAQI
7th Aug 2025402 AMAQI
7th Aug 2025423 AMAQI
7th Aug 2025504 AMAQI
7th Aug 2025375 AMAQI

26°C13/40°C

7th Aug 2025346 AMAQI
7th Aug 2025347 AMAQI
7th Aug 2025338 AMAQI
7th Aug 2025359 AMAQI
7th Aug 20253210 AMAQI
7th Aug 20253311 AMAQI
7th Aug 20253612 PMAQI
7th Aug 2025361 PMAQI
7th Aug 2025362 PMAQI
7th Aug 2025373 PMAQI
7th Aug 2025364 PMAQI
7th Aug 2025355 PMAQI
7th Aug 2025356 PMAQI
7th Aug 2025377 PMAQI
7th Aug 2025378 PMAQI
7th Aug 2025339 PMAQI
7th Aug 20253310 PMAQI
7th Aug 20253311 PMAQI
8th Aug 20253312 AMAQI
8th Aug 2025321 AMAQI
8th Aug 2025362 AMAQI
8th Aug 2025373 AMAQI
8th Aug 2025384 AMAQI
8th Aug 2025345 AMAQI

28°C16/40°C

8th Aug 2025356 AMAQI
8th Aug 2025367 AMAQI
8th Aug 2025398 AMAQI
8th Aug 2025389 AMAQI
8th Aug 20253810 AMAQI
8th Aug 20254011 AMAQI
8th Aug 20254612 PMAQI
8th Aug 2025461 PMAQI
8th Aug 2025492 PMAQI
8th Aug 2025403 PMAQI
8th Aug 2025384 PMAQI
8th Aug 2025375 PMAQI
8th Aug 2025356 PMAQI
8th Aug 2025377 PMAQI
8th Aug 2025378 PMAQI
8th Aug 2025359 PMAQI
8th Aug 20253210 PMAQI
8th Aug 20253511 PMAQI
9th Aug 20253612 AMAQI
9th Aug 2025351 AMAQI
9th Aug 2025362 AMAQI
9th Aug 2025393 AMAQI
9th Aug 2025424 AMAQI
9th Aug 2025485 AMAQI

28°C15/43°C

9th Aug 2025386 AMAQI
9th Aug 2025327 AMAQI
9th Aug 2025308 AMAQI
9th Aug 2025349 AMAQI
9th Aug 20253610 AMAQI
9th Aug 20253811 AMAQI
9th Aug 20254212 PMAQI
9th Aug 2025431 PMAQI
9th Aug 2025432 PMAQI
9th Aug 2025423 PMAQI
9th Aug 2025414 PMAQI
9th Aug 2025405 PMAQI
9th Aug 2025416 PMAQI
9th Aug 2025407 PMAQI
9th Aug 2025408 PMAQI
9th Aug 2025389 PMAQI
9th Aug 20253710 PMAQI
9th Aug 20253511 PMAQI
10th Aug 20253612 AMAQI
10th Aug 2025371 AMAQI
10th Aug 2025372 AMAQI
10th Aug 2025363 AMAQI
10th Aug 2025324 AMAQI
10th Aug 2025315 AMAQI

29°C16/44°C

10th Aug 2025346 AMAQI
10th Aug 2025297 AMAQI
10th Aug 2025248 AMAQI
10th Aug 2025259 AMAQI
10th Aug 20252310 AMAQI
10th Aug 20252111 AMAQI
10th Aug 20252312 PMAQI
10th Aug 2025261 PMAQI
10th Aug 2025272 PMAQI
10th Aug 2025283 PMAQI
10th Aug 2025304 PMAQI
10th Aug 2025315 PMAQI
10th Aug 2025306 PMAQI
10th Aug 2025307 PMAQI
10th Aug 2025288 PMAQI
10th Aug 2025289 PMAQI
10th Aug 20252610 PMAQI
10th Aug 20252711 PMAQI
11th Aug 20252912 AMAQI
11th Aug 2025281 AMAQI
11th Aug 2025282 AMAQI
11th Aug 2025253 AMAQI
11th Aug 2025264 AMAQI
11th Aug 2025255 AMAQI

28°C15/44°C

11th Aug 2025246 AMAQI
11th Aug 2025217 AMAQI
11th Aug 2025258 AMAQI
11th Aug 2025249 AMAQI
11th Aug 20252410 AMAQI
11th Aug 20252411 AMAQI
11th Aug 20252612 PMAQI
11th Aug 2025281 PMAQI
11th Aug 2025322 PMAQI
11th Aug 2025333 PMAQI
11th Aug 2025384 PMAQI
11th Aug 2025395 PMAQI
11th Aug 2025406 PMAQI
11th Aug 2025287 PMAQI
11th Aug 2025348 PMAQI
11th Aug 2025379 PMAQI
11th Aug 20254010 PMAQI
11th Aug 20253211 PMAQI
12th Aug 20252812 AMAQI
12th Aug 2025261 AMAQI
12th Aug 2025252 AMAQI
12th Aug 2025233 AMAQI
12th Aug 2025264 AMAQI
12th Aug 2025235 AMAQI

26°C14/43°C

12th Aug 2025226 AMAQI
12th Aug 2025207 AMAQI
12th Aug 2025238 AMAQI
12th Aug 2025229 AMAQI
12th Aug 20252210 AMAQI
12th Aug 20252611 AMAQI
12th Aug 20252812 PMAQI
12th Aug 2025301 PMAQI
12th Aug 2025322 PMAQI
12th Aug 2025413 PMAQI
12th Aug 2025404 PMAQI
12th Aug 2025395 PMAQI
12th Aug 2025386 PMAQI
12th Aug 2025297 PMAQI
12th Aug 2025328 PMAQI
12th Aug 2025409 PMAQI
12th Aug 20254210 PMAQI
12th Aug 20254111 PMAQI
13th Aug 20253812 AMAQI
13th Aug 2025341 AMAQI
13th Aug 2025312 AMAQI
13th Aug 2025323 AMAQI
13th Aug 2025264 AMAQI
13th Aug 2025275 AMAQI

24°C13/39°C

13th Aug 2025236 AMAQI
13th Aug 2025227 AMAQI
13th Aug 2025188 AMAQI
13th Aug 2025199 AMAQI
13th Aug 20252210 AMAQI
13th Aug 20252511 AMAQI
13th Aug 20252412 PMAQI
13th Aug 2025261 PMAQI
13th Aug 2025292 PMAQI
13th Aug 2025283 PMAQI
13th Aug 2025304 PMAQI
13th Aug 2025315 PMAQI
13th Aug 2025346 PMAQI
13th Aug 2025307 PMAQI
13th Aug 2025288 PMAQI
13th Aug 2025289 PMAQI
13th Aug 20252710 PMAQI
13th Aug 20252611 PMAQI
14th Aug 20252212 AMAQI
14th Aug 2025201 AMAQI
14th Aug 2025192 AMAQI
14th Aug 2025173 AMAQI
14th Aug 2025174 AMAQI
14th Aug 2025155 AMAQI

23°C14/37°C

14th Aug 2025146 AMAQI
14th Aug 2025137 AMAQI
14th Aug 2025148 AMAQI
14th Aug 2025169 AMAQI
14th Aug 20251810 AMAQI
14th Aug 20251611 AMAQI
14th Aug 20251812 PMAQI
14th Aug 2025181 PMAQI
14th Aug 2025202 PMAQI
14th Aug 2025203 PMAQI
14th Aug 2025254 PMAQI
14th Aug 2025345 PMAQI
14th Aug 2025346 PMAQI
14th Aug 2025217 PMAQI
14th Aug 2025268 PMAQI
14th Aug 2025319 PMAQI
14th Aug 20253110 PMAQI
14th Aug 20253111 PMAQI
15th Aug 20253312 AMAQI
15th Aug 2025351 AMAQI
15th Aug 2025312 AMAQI
15th Aug 2025323 AMAQI
15th Aug 2025334 AMAQI
15th Aug 2025335 AMAQI

24°C14/38°C

15th Aug 2025306 AMAQI
15th Aug 2025347 AMAQI
15th Aug 2025358 AMAQI
15th Aug 2025369 AMAQI
15th Aug 20253910 AMAQI
15th Aug 20254411 AMAQI
15th Aug 20254912 PMAQI
15th Aug 2025531 PMAQI
15th Aug 2025532 PMAQI
15th Aug 2025493 PMAQI
15th Aug 2025484 PMAQI
15th Aug 2025485 PMAQI
15th Aug 2025466 PMAQI
15th Aug 2025387 PMAQI
15th Aug 2025388 PMAQI
15th Aug 2025379 PMAQI
15th Aug 20253410 PMAQI
15th Aug 20253311 PMAQI
16th Aug 20252812 AMAQI
16th Aug 2025241 AMAQI
16th Aug 2025182 AMAQI
16th Aug 2025173 AMAQI
16th Aug 2025194 AMAQI
16th Aug 2025185 AMAQI

26°C14/40°C

16th Aug 2025156 AMAQI
6 AM
16th Aug 2025147 AMAQI
16th Aug 2025128 AMAQI
16th Aug 2025119 AMAQI
16th Aug 20251210 AMAQI
16th Aug 20251111 AMAQI
16th Aug 20251212 PMAQI
16th Aug 2025141 PMAQI
1 PM
16th Aug 2025122 PMAQI
16th Aug 2025143 PMAQI
16th Aug 2025154 PMAQI
16th Aug 2025195 PMAQI
16th Aug 2025216 PMAQI
16th Aug 2025177 PMAQI
16th Aug 2025188 PMAQI
8 PM
16th Aug 2025189 PMAQI
16th Aug 20251810 PMAQI
16th Aug 20251411 PMAQI
1 AM
5 AM

23°C16/34°C

Day time
Avg. Highest Time
12 PM - 6 PM

30AQI

7 hours / Day
210 hours / Month
Avg. Lowest Time
7 AM - 9 AM

24AQI

3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 PM to 6 PM (Avg. 30), while the lowest AQI was between 7 AM to 9 AM (Avg. 24).
Night time
Avg. Highest Time
12 AM - 11 PM

27AQI

9 hours / Day
270 hours / Month
Avg. Lowest Time
12 AM - 11 PM

27AQI

9 hours / Day
270 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 27), while the lowest AQI was between 12 AM to 11 PM (Avg. 27).

2025 Days Vs Air Quality

University Of California Davis, California, United States

2025

96%

219

4%

9

Total number of days with different AQI categories in last 229 days in 2025 (136 days remaining)

Good
219 Days
Moderate
9 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 96%

Health Risk Level:

Very Low

In 2025, 96% of 229 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

University Of California Davis, California, 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
47AQI
2nd January 2025
36AQI
3rd January 2025
48AQI
4th January 2025
23AQI
5th January 2025
27AQI
6th January 2025
32AQI
7th January 2025
25AQI
8th January 2025
25AQI
9th January 2025
32AQI
10th January 2025
57AQI
11th January 2025
37AQI
12th January 2025
25AQI
13th January 2025
29AQI
14th January 2025
26AQI
15th January 2025
43AQI
16th January 2025
46AQI
17th January 2025
48AQI
18th January 2025
47AQI
19th January 2025
52AQI
20th January 2025
35AQI
21st January 2025
39AQI
22nd January 2025
39AQI
23rd January 2025
51AQI
24th January 2025
56AQI
25th January 2025
44AQI
26th January 2025
32AQI
27th January 2025
24AQI
28th January 2025
47AQI
29th January 2025
46AQI
30th January 2025
54AQI
31st January 2025
50AQI
1st February 2025
62AQI
2nd February 2025
28AQI
3rd February 2025
23AQI
4th February 2025
24AQI
5th February 2025
29AQI
6th February 2025
37AQI
7th February 2025
26AQI
8th February 2025
23AQI
9th February 2025
26AQI
10th February 2025
25AQI
11th February 2025
29AQI
12th February 2025
33AQI
13th February 2025
31AQI
14th February 2025
30AQI
15th February 2025
26AQI
16th February 2025
26AQI
17th February 2025
22AQI
18th February 2025
22AQI
19th February 2025
23AQI
20th February 2025
25AQI
21st February 2025
25AQI
22nd February 2025
36AQI
23rd February 2025
21AQI
24th February 2025
22AQI
25th February 2025
22AQI
26th February 2025
27AQI
27th February 2025
31AQI
28th February 2025
32AQI
1st March 2025
36AQI
2nd March 2025
27AQI
3rd March 2025
22AQI
4th March 2025
23AQI
5th March 2025
22AQI
6th March 2025
23AQI
7th March 2025
28AQI
8th March 2025
24AQI
9th March 2025
32AQI
10th March 2025
27AQI
11th March 2025
30AQI
12th March 2025
25AQI
13th March 2025
21AQI
14th March 2025
17AQI
15th March 2025
40AQI
16th March 2025
34AQI
17th March 2025
15AQI
18th March 2025
16AQI
19th March 2025
17AQI
20th March 2025
15AQI
21st March 2025
18AQI
22nd March 2025
18AQI
23rd March 2025
17AQI
24th March 2025
20AQI
25th March 2025
24AQI
26th March 2025
21AQI
27th March 2025
18AQI
28th March 2025
25AQI
29th March 2025
17AQI
30th March 2025
22AQI
31st March 2025
26AQI
1st April 2025
17AQI
2nd April 2025
17AQI
3rd April 2025
20AQI
4th April 2025
20AQI
5th April 2025
18AQI
6th April 2025
21AQI
7th April 2025
15AQI
8th April 2025
17AQI
9th April 2025
20AQI
10th April 2025
23AQI
11th April 2025
17AQI
12th April 2025
25AQI
13th April 2025
25AQI
14th April 2025
20AQI
15th April 2025
30AQI
16th April 2025
30AQI
17th April 2025
20AQI
18th April 2025
24AQI
19th April 2025
25AQI
20th April 2025
26AQI
21st April 2025
27AQI
22nd April 2025
32AQI
23rd April 2025
46AQI
24th April 2025
40AQI
25th April 2025
22AQI
26th April 2025
19AQI
27th April 2025
19AQI
28th April 2025
20AQI
29th April 2025
23AQI
30th April 2025
30AQI
1st May 2025
43AQI
2nd May 2025
30AQI
3rd May 2025
18AQI
4th May 2025
28AQI
5th May 2025
28AQI
6th May 2025
31AQI
7th May 2025
46AQI
8th May 2025
40AQI
9th May 2025
33AQI
10th May 2025
27AQI
11th May 2025
25AQI
12th May 2025
19AQI
13th May 2025
16AQI
14th May 2025
22AQI
15th May 2025
27AQI
16th May 2025
38AQI
17th May 2025
29AQI
18th May 2025
24AQI
19th May 2025
21AQI
20th May 2025
20AQI
21st May 2025
30AQI
22nd May 2025
30AQI
23rd May 2025
25AQI
24th May 2025
36AQI
25th May 2025
24AQI
26th May 2025
19AQI
27th May 2025
29AQI
28th May 2025
31AQI
29th May 2025
27AQI
30th May 2025
30AQI
31st May 2025
38AQI
1st June 2025
52AQI
2nd June 2025
56AQI
3rd June 2025
42AQI
4th June 2025
44AQI
5th June 2025
36AQI
6th June 2025
28AQI
7th June 2025
27AQI
8th June 2025
20AQI
9th June 2025
23AQI
10th June 2025
27AQI
11th June 2025
41AQI
12th June 2025
50AQI
13th June 2025
48AQI
14th June 2025
45AQI
15th June 2025
42AQI
16th June 2025
44AQI
17th June 2025
40AQI
18th June 2025
38AQI
19th June 2025
42AQI
20th June 2025
42AQI
21st June 2025
28AQI
22nd June 2025
24AQI
23rd June 2025
26AQI
24th June 2025
31AQI
25th June 2025
23AQI
26th June 2025
31AQI
27th June 2025
37AQI
28th June 2025
39AQI
29th June 2025
33AQI
30th June 2025
26AQI
1st July 2025
32AQI
2nd July 2025
28AQI
3rd July 2025
40AQI
4th July 2025
36AQI
5th July 2025
40AQI
6th July 2025
33AQI
7th July 2025
27AQI
8th July 2025
24AQI
9th July 2025
20AQI
10th July 2025
30AQI
11th July 2025
47AQI
12th July 2025
51AQI
13th July 2025
37AQI
14th July 2025
26AQI
15th July 2025
24AQI
16th July 2025
31AQI
17th July 2025
28AQI
18th July 2025
25AQI
19th July 2025
24AQI
20th July 2025
22AQI
21st July 2025
28AQI
22nd July 2025
19AQI
23rd July 2025
16AQI
24th July 2025
17AQI
25th July 2025
17AQI
26th July 2025
16AQI
27th July 2025
15AQI
28th July 2025
21AQI
29th July 2025
30AQI
30th July 2025
28AQI
31st July 2025
36AQI
1st August 2025
32AQI
2nd August 2025
33AQI
3rd August 2025
39AQI
4th August 2025
38AQI
5th August 2025
34AQI
6th August 2025
36AQI
7th August 2025
37AQI
8th August 2025
37AQI
9th August 2025
39AQI
10th August 2025
30AQI
11th August 2025
30AQI
12th August 2025
30AQI
13th August 2025
28AQI
14th August 2025
22AQI
15th August 2025
38AQI
16th August 2025
17AQI

39AQI

28AQI

23AQI

24AQI

29AQI

36AQI

28AQI

33AQI

No. of days

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

202530AQI

26
5
27
1
31
30
31
28
2
30
1
16
219
9

Highest AQI recorded in

January

39AQI

Lowest AQI recorded in

March

23AQI

202430AQI

31
29
31
30
31
28
1
26
4
31
30
30
1
27
3
21
10
345
19

Highest AQI recorded in

December

40AQI

Lowest AQI recorded in

February

24AQI

202332AQI

29
2
21
6
30
1
28
30
1
29
27
4
28
1
1
19
5
27
28
1
29
2
325
23
1

Highest AQI recorded in

September

38AQI

Lowest AQI recorded in

May

29AQI

202230AQI

19
9
22
31
29
31
30
21
1
2
24
5
31
28
2
23
8
290
26

Highest AQI recorded in

August

45AQI

Lowest AQI recorded in

March

22AQI

202136AQI

24
6
25
3
31
29
1
31
30
31
18
10
2
1
17
12
28
3
23
7
24
7
311
49
2
1

Highest AQI recorded in

August

60AQI

Lowest AQI recorded in

March

28AQI

202049AQI

13
20
16
29
1
29
2
16
6
8
1
6
11
9
4
11
15
1
3
16
14
20
11
176
60
18
8

Highest AQI recorded in

September

96AQI

Lowest AQI recorded in

March

25AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2020(Avg.)
49AQI
Least Polluted Year Recorded
2025(Avg.)
30AQI

University Of California Davis's annual 2025 AQI (30) shows an average percentage change of -13.2% (improved AQI) compared to previous years: 2020 (49), 2021 (36), 2022 (30), 2023 (32), 2024 (30).