Grass Valley, 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
Grass Valley, California, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2021
201AQILowest AQI recorded on
18th Aug 2024
28AQISame Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 33 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Grass Valley, California, United States
AQI
Day
Night
.
5 AM4th Aug 2025
8 PM
4 AM5th Aug 2025
Day time
Avg. Highest Time
3PM4th Aug
67AQI
Avg. Lowest Time
9AM4th Aug
27AQI
Night time
Avg. Highest Time
11PM4th Aug
44AQI
Avg. Lowest Time
5AM4th Aug
32AQI
In the last 24 hours,
Grass Valley's AQI reached its highest point of 67 at 3 PM during the Day, while the lowest point, 27, was recorded at 9 AM during the Day between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Grass Valley, California, United States
JulAug
06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th
Day
Night
6th Jul 2025275 AMAQI
6th Jul 2025316 AMAQI
6th Jul 2025287 AMAQI
6th Jul 2025278 AMAQI
6th Jul 2025299 AMAQI
6th Jul 20253310 AMAQI
6th Jul 20253211 AMAQI
6th Jul 20253412 PMAQI
6th Jul 2025301 PMAQI
6th Jul 2025322 PMAQI
6th Jul 2025293 PMAQI
6th Jul 2025294 PMAQI
6th Jul 2025285 PMAQI
6th Jul 2025286 PMAQI
6th Jul 2025287 PMAQI
6th Jul 2025288 PMAQI
6th Jul 2025239 PMAQI
6th Jul 20252410 PMAQI
6th Jul 20252311 PMAQI
7th Jul 20252412 AMAQI
7th Jul 2025241 AMAQI
7th Jul 2025262 AMAQI
7th Jul 2025273 AMAQI
7th Jul 2025234 AMAQI
26°C19/34°C
7th Jul 2025245 AMAQI
7th Jul 2025256 AMAQI
7th Jul 2025257 AMAQI
7th Jul 2025308 AMAQI
7th Jul 2025319 AMAQI
7th Jul 20252610 AMAQI
7th Jul 20253011 AMAQI
7th Jul 20253012 PMAQI
7th Jul 2025351 PMAQI
7th Jul 2025332 PMAQI
7th Jul 2025273 PMAQI
7th Jul 2025284 PMAQI
7th Jul 2025285 PMAQI
7th Jul 2025306 PMAQI
7th Jul 2025257 PMAQI
7th Jul 2025278 PMAQI
7th Jul 2025289 PMAQI
7th Jul 20252610 PMAQI
7th Jul 20252511 PMAQI
8th Jul 20252312 AMAQI
8th Jul 2025241 AMAQI
8th Jul 2025262 AMAQI
8th Jul 2025263 AMAQI
8th Jul 2025324 AMAQI
27°C21/35°C
8th Jul 2025305 AMAQI
8th Jul 2025306 AMAQI
8th Jul 2025367 AMAQI
8th Jul 2025318 AMAQI
8th Jul 2025339 AMAQI
8th Jul 20253710 AMAQI
8th Jul 20254011 AMAQI
8th Jul 20254312 PMAQI
8th Jul 2025441 PMAQI
8th Jul 2025362 PMAQI
8th Jul 2025353 PMAQI
8th Jul 2025314 PMAQI
8th Jul 2025285 PMAQI
8th Jul 2025306 PMAQI
8th Jul 2025297 PMAQI
8th Jul 2025288 PMAQI
8th Jul 2025279 PMAQI
8th Jul 20252610 PMAQI
8th Jul 20252411 PMAQI
9th Jul 20252412 AMAQI
9th Jul 2025261 AMAQI
9th Jul 2025292 AMAQI
9th Jul 2025263 AMAQI
9th Jul 2025244 AMAQI
25°C19/33°C
9th Jul 2025305 AMAQI
9th Jul 2025306 AMAQI
9th Jul 2025327 AMAQI
9th Jul 2025288 AMAQI
9th Jul 2025309 AMAQI
9th Jul 20253410 AMAQI
9th Jul 20253611 AMAQI
9th Jul 20253812 PMAQI
9th Jul 2025381 PMAQI
9th Jul 2025372 PMAQI
9th Jul 2025323 PMAQI
9th Jul 2025294 PMAQI
9th Jul 2025305 PMAQI
9th Jul 2025286 PMAQI
9th Jul 2025297 PMAQI
9th Jul 2025308 PMAQI
9th Jul 2025259 PMAQI
9th Jul 20252610 PMAQI
9th Jul 20252411 PMAQI
10th Jul 20252312 AMAQI
10th Jul 2025241 AMAQI
10th Jul 2025282 AMAQI
10th Jul 2025293 AMAQI
10th Jul 2025294 AMAQI
26°C18/33°C
10th Jul 2025305 AMAQI
10th Jul 2025276 AMAQI
10th Jul 2025287 AMAQI
10th Jul 2025298 AMAQI
10th Jul 2025309 AMAQI
10th Jul 20254310 AMAQI
10th Jul 20255211 AMAQI
10th Jul 20255512 PMAQI
10th Jul 2025541 PMAQI
10th Jul 2025462 PMAQI
10th Jul 2025433 PMAQI
10th Jul 2025424 PMAQI
10th Jul 2025425 PMAQI
10th Jul 2025396 PMAQI
10th Jul 2025367 PMAQI
10th Jul 2025358 PMAQI
10th Jul 2025389 PMAQI
10th Jul 20253910 PMAQI
10th Jul 20254111 PMAQI
11th Jul 20254212 AMAQI
11th Jul 2025451 AMAQI
11th Jul 2025432 AMAQI
11th Jul 2025453 AMAQI
11th Jul 2025474 AMAQI
29°C20/37°C
11th Jul 2025525 AMAQI
11th Jul 2025536 AMAQI
11th Jul 2025527 AMAQI
11th Jul 2025538 AMAQI
11th Jul 2025549 AMAQI
11th Jul 20255810 AMAQI
11th Jul 20256111 AMAQI
11th Jul 20256312 PMAQI
11th Jul 2025611 PMAQI
11th Jul 2025642 PMAQI
11th Jul 2025583 PMAQI
11th Jul 2025564 PMAQI
11th Jul 2025575 PMAQI
11th Jul 2025566 PMAQI
11th Jul 2025557 PMAQI
11th Jul 2025558 PMAQI
11th Jul 2025549 PMAQI
11th Jul 20255410 PMAQI
11th Jul 20255411 PMAQI
12th Jul 20255612 AMAQI
12th Jul 2025561 AMAQI
12th Jul 2025552 AMAQI
12th Jul 2025573 AMAQI
12th Jul 2025584 AMAQI
31°C24/38°C
12th Jul 2025615 AMAQI
12th Jul 2025656 AMAQI
12th Jul 2025607 AMAQI
12th Jul 2025608 AMAQI
12th Jul 2025599 AMAQI
12th Jul 20256010 AMAQI
12th Jul 20256111 AMAQI
12th Jul 20256212 PMAQI
12th Jul 2025641 PMAQI
12th Jul 2025632 PMAQI
12th Jul 2025603 PMAQI
12th Jul 2025624 PMAQI
12th Jul 2025605 PMAQI
12th Jul 2025606 PMAQI
12th Jul 2025617 PMAQI
12th Jul 2025598 PMAQI
12th Jul 2025589 PMAQI
12th Jul 20255810 PMAQI
12th Jul 20255811 PMAQI
13th Jul 20255812 AMAQI
13th Jul 2025601 AMAQI
13th Jul 2025602 AMAQI
13th Jul 2025613 AMAQI
13th Jul 2025654 AMAQI
30°C24/38°C
13th Jul 2025645 AMAQI
13th Jul 2025656 AMAQI
13th Jul 2025627 AMAQI
13th Jul 2025628 AMAQI
13th Jul 2025639 AMAQI
13th Jul 20256410 AMAQI
13th Jul 20256411 AMAQI
13th Jul 20256612 PMAQI
13th Jul 2025661 PMAQI
13th Jul 2025662 PMAQI
13th Jul 2025643 PMAQI
13th Jul 2025624 PMAQI
13th Jul 2025625 PMAQI
13th Jul 2025616 PMAQI
13th Jul 2025617 PMAQI
13th Jul 2025608 PMAQI
13th Jul 2025589 PMAQI
13th Jul 20255710 PMAQI
13th Jul 20255911 PMAQI
14th Jul 20255812 AMAQI
14th Jul 2025571 AMAQI
14th Jul 2025562 AMAQI
14th Jul 2025553 AMAQI
14th Jul 2025484 AMAQI
30°C23/38°C
14th Jul 2025425 AMAQI
14th Jul 2025446 AMAQI
14th Jul 2025527 AMAQI
14th Jul 2025528 AMAQI
14th Jul 2025539 AMAQI
14th Jul 20255710 AMAQI
14th Jul 20255611 AMAQI
14th Jul 20255812 PMAQI
14th Jul 2025581 PMAQI
14th Jul 2025592 PMAQI
14th Jul 2025583 PMAQI
14th Jul 2025584 PMAQI
14th Jul 2025565 PMAQI
14th Jul 2025566 PMAQI
14th Jul 2025547 PMAQI
14th Jul 2025528 PMAQI
14th Jul 2025509 PMAQI
14th Jul 20255110 PMAQI
14th Jul 20255011 PMAQI
15th Jul 20255012 AMAQI
15th Jul 2025501 AMAQI
15th Jul 2025522 AMAQI
15th Jul 2025503 AMAQI
15th Jul 2025404 AMAQI
31°C24/38°C
15th Jul 2025475 AMAQI
15th Jul 2025476 AMAQI
15th Jul 2025467 AMAQI
15th Jul 2025438 AMAQI
15th Jul 2025449 AMAQI
15th Jul 20254910 AMAQI
15th Jul 20255211 AMAQI
15th Jul 20255212 PMAQI
15th Jul 2025521 PMAQI
15th Jul 2025532 PMAQI
15th Jul 2025543 PMAQI
15th Jul 2025534 PMAQI
15th Jul 2025525 PMAQI
15th Jul 2025536 PMAQI
15th Jul 2025497 PMAQI
15th Jul 2025498 PMAQI
15th Jul 2025489 PMAQI
15th Jul 20254710 PMAQI
15th Jul 20254611 PMAQI
16th Jul 20254412 AMAQI
16th Jul 2025451 AMAQI
16th Jul 2025472 AMAQI
16th Jul 2025443 AMAQI
16th Jul 2025374 AMAQI
28°C21/36°C
16th Jul 2025395 AMAQI
16th Jul 2025356 AMAQI
16th Jul 2025467 AMAQI
16th Jul 2025438 AMAQI
16th Jul 2025439 AMAQI
16th Jul 20254310 AMAQI
16th Jul 20254811 AMAQI
16th Jul 20255012 PMAQI
16th Jul 2025501 PMAQI
16th Jul 2025482 PMAQI
16th Jul 2025453 PMAQI
16th Jul 2025434 PMAQI
16th Jul 2025445 PMAQI
16th Jul 2025426 PMAQI
16th Jul 2025447 PMAQI
16th Jul 2025428 PMAQI
16th Jul 2025369 PMAQI
16th Jul 20253410 PMAQI
16th Jul 20253311 PMAQI
17th Jul 20253312 AMAQI
17th Jul 2025321 AMAQI
17th Jul 2025342 AMAQI
17th Jul 2025353 AMAQI
17th Jul 2025324 AMAQI
25°C19/33°C
17th Jul 2025365 AMAQI
17th Jul 2025336 AMAQI
17th Jul 2025407 AMAQI
17th Jul 2025398 AMAQI
17th Jul 2025399 AMAQI
17th Jul 20254610 AMAQI
17th Jul 20255011 AMAQI
17th Jul 20255112 PMAQI
17th Jul 2025461 PMAQI
17th Jul 2025442 PMAQI
17th Jul 2025393 PMAQI
17th Jul 2025374 PMAQI
17th Jul 2025365 PMAQI
17th Jul 2025346 PMAQI
17th Jul 2025357 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025379 PMAQI
17th Jul 20253510 PMAQI
17th Jul 20253311 PMAQI
18th Jul 20253212 AMAQI
18th Jul 2025341 AMAQI
18th Jul 2025362 AMAQI
18th Jul 2025363 AMAQI
18th Jul 2025374 AMAQI
25°C18/33°C
18th Jul 2025355 AMAQI
18th Jul 2025376 AMAQI
18th Jul 2025397 AMAQI
18th Jul 2025388 AMAQI
18th Jul 2025379 AMAQI
18th Jul 20254010 AMAQI
18th Jul 20254711 AMAQI
18th Jul 20254312 PMAQI
18th Jul 2025471 PMAQI
18th Jul 2025432 PMAQI
18th Jul 2025423 PMAQI
18th Jul 2025434 PMAQI
18th Jul 2025425 PMAQI
18th Jul 2025426 PMAQI
18th Jul 2025397 PMAQI
18th Jul 2025398 PMAQI
18th Jul 2025389 PMAQI
18th Jul 20253610 PMAQI
18th Jul 20253411 PMAQI
19th Jul 20253012 AMAQI
19th Jul 2025321 AMAQI
19th Jul 2025322 AMAQI
19th Jul 2025373 AMAQI
19th Jul 2025384 AMAQI
27°C19/35°C
19th Jul 2025335 AMAQI
19th Jul 2025346 AMAQI
19th Jul 2025387 AMAQI
19th Jul 2025388 AMAQI
19th Jul 2025369 AMAQI
19th Jul 20253510 AMAQI
19th Jul 20254111 AMAQI
19th Jul 20254212 PMAQI
19th Jul 2025391 PMAQI
19th Jul 2025362 PMAQI
19th Jul 2025393 PMAQI
19th Jul 2025374 PMAQI
19th Jul 2025375 PMAQI
19th Jul 2025366 PMAQI
19th Jul 2025377 PMAQI
19th Jul 2025378 PMAQI
19th Jul 2025369 PMAQI
19th Jul 20253310 PMAQI
19th Jul 20253211 PMAQI
20th Jul 20253112 AMAQI
20th Jul 2025341 AMAQI
20th Jul 2025332 AMAQI
20th Jul 2025313 AMAQI
20th Jul 2025374 AMAQI
27°C20/36°C
20th Jul 2025425 AMAQI
20th Jul 2025356 AMAQI
20th Jul 2025367 AMAQI
20th Jul 2025398 AMAQI
20th Jul 2025399 AMAQI
20th Jul 20253710 AMAQI
20th Jul 20254411 AMAQI
20th Jul 20253912 PMAQI
20th Jul 2025361 PMAQI
20th Jul 2025362 PMAQI
20th Jul 2025403 PMAQI
20th Jul 2025384 PMAQI
20th Jul 2025405 PMAQI
20th Jul 2025386 PMAQI
20th Jul 2025387 PMAQI
20th Jul 2025378 PMAQI
20th Jul 2025349 PMAQI
20th Jul 20253210 PMAQI
20th Jul 20252811 PMAQI
21st Jul 20252712 AMAQI
21st Jul 2025261 AMAQI
21st Jul 2025312 AMAQI
21st Jul 2025323 AMAQI
21st Jul 2025304 AMAQI
27°C20/34°C
21st Jul 2025265 AMAQI
21st Jul 2025276 AMAQI
21st Jul 2025257 AMAQI
21st Jul 2025248 AMAQI
21st Jul 2025269 AMAQI
21st Jul 20252710 AMAQI
21st Jul 20253311 AMAQI
21st Jul 20253912 PMAQI
21st Jul 2025401 PMAQI
21st Jul 2025312 PMAQI
21st Jul 2025333 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025335 PMAQI
21st Jul 2025296 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025298 PMAQI
21st Jul 2025279 PMAQI
21st Jul 20252510 PMAQI
21st Jul 20252511 PMAQI
22nd Jul 20252612 AMAQI
22nd Jul 2025271 AMAQI
22nd Jul 2025272 AMAQI
22nd Jul 2025273 AMAQI
22nd Jul 2025234 AMAQI
22°C17/29°C
22nd Jul 2025215 AMAQI
22nd Jul 2025216 AMAQI
22nd Jul 2025227 AMAQI
22nd Jul 2025218 AMAQI
22nd Jul 2025239 AMAQI
22nd Jul 20252510 AMAQI
22nd Jul 20252511 AMAQI
22nd Jul 20253012 PMAQI
22nd Jul 2025351 PMAQI
22nd Jul 2025282 PMAQI
22nd Jul 2025273 PMAQI
22nd Jul 2025254 PMAQI
22nd Jul 2025225 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025247 PMAQI
22nd Jul 2025238 PMAQI
22nd Jul 2025209 PMAQI
22nd Jul 20251910 PMAQI
22nd Jul 20251911 PMAQI
23rd Jul 20251912 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025202 AMAQI
23rd Jul 2025223 AMAQI
23rd Jul 2025214 AMAQI
21°C15/28°C
23rd Jul 2025195 AMAQI
23rd Jul 2025216 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025188 AMAQI
23rd Jul 2025199 AMAQI
23rd Jul 20252010 AMAQI
23rd Jul 20252611 AMAQI
23rd Jul 20252712 PMAQI
23rd Jul 2025281 PMAQI
23rd Jul 2025282 PMAQI
23rd Jul 2025263 PMAQI
23rd Jul 2025244 PMAQI
23rd Jul 2025225 PMAQI
23rd Jul 2025226 PMAQI
23rd Jul 2025217 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025229 PMAQI
23rd Jul 20251910 PMAQI
23rd Jul 20251711 PMAQI
24th Jul 20251812 AMAQI
24th Jul 2025211 AMAQI
24th Jul 2025172 AMAQI
24th Jul 2025183 AMAQI
24th Jul 2025174 AMAQI
22°C16/30°C
24th Jul 2025205 AMAQI
24th Jul 2025226 AMAQI
24th Jul 2025197 AMAQI
24th Jul 2025298 AMAQI
24th Jul 2025259 AMAQI
24th Jul 20253010 AMAQI
24th Jul 20253411 AMAQI
24th Jul 20253512 PMAQI
24th Jul 2025341 PMAQI
24th Jul 2025302 PMAQI
24th Jul 2025283 PMAQI
24th Jul 2025264 PMAQI
24th Jul 2025275 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025217 PMAQI
24th Jul 2025208 PMAQI
24th Jul 2025189 PMAQI
24th Jul 20252210 PMAQI
24th Jul 20252011 PMAQI
25th Jul 20252012 AMAQI
25th Jul 2025221 AMAQI
25th Jul 2025202 AMAQI
25th Jul 2025233 AMAQI
25th Jul 2025194 AMAQI
23°C16/31°C
25th Jul 2025255 AMAQI
25th Jul 2025256 AMAQI
25th Jul 2025187 AMAQI
25th Jul 2025198 AMAQI
25th Jul 2025199 AMAQI
25th Jul 20252310 AMAQI
25th Jul 20252911 AMAQI
25th Jul 20254412 PMAQI
25th Jul 2025351 PMAQI
25th Jul 2025312 PMAQI
25th Jul 2025303 PMAQI
25th Jul 2025294 PMAQI
25th Jul 2025275 PMAQI
25th Jul 2025256 PMAQI
25th Jul 2025237 PMAQI
25th Jul 2025248 PMAQI
25th Jul 2025259 PMAQI
25th Jul 20252110 PMAQI
25th Jul 20252011 PMAQI
26th Jul 20251912 AMAQI
26th Jul 2025191 AMAQI
26th Jul 2025192 AMAQI
26th Jul 2025183 AMAQI
26th Jul 2025194 AMAQI
23°C17/31°C
26th Jul 2025265 AMAQI
26th Jul 2025266 AMAQI
26th Jul 2025207 AMAQI
26th Jul 2025208 AMAQI
26th Jul 2025259 AMAQI
26th Jul 20252610 AMAQI
26th Jul 20253411 AMAQI
26th Jul 20253912 PMAQI
26th Jul 2025351 PMAQI
26th Jul 2025312 PMAQI
26th Jul 2025263 PMAQI
26th Jul 2025264 PMAQI
26th Jul 2025235 PMAQI
26th Jul 2025256 PMAQI
26th Jul 2025237 PMAQI
26th Jul 2025258 PMAQI
26th Jul 2025229 PMAQI
26th Jul 20252010 PMAQI
26th Jul 20251911 PMAQI
27th Jul 20252012 AMAQI
27th Jul 2025191 AMAQI
27th Jul 2025222 AMAQI
27th Jul 2025263 AMAQI
27th Jul 2025294 AMAQI
23°C16/29°C
27th Jul 2025285 AMAQI
27th Jul 2025236 AMAQI
27th Jul 2025277 AMAQI
27th Jul 2025228 AMAQI
27th Jul 2025249 AMAQI
27th Jul 20252410 AMAQI
27th Jul 20253311 AMAQI
27th Jul 20253512 PMAQI
27th Jul 2025321 PMAQI
27th Jul 2025302 PMAQI
27th Jul 2025283 PMAQI
27th Jul 2025284 PMAQI
27th Jul 2025265 PMAQI
27th Jul 2025246 PMAQI
27th Jul 2025257 PMAQI
27th Jul 2025268 PMAQI
27th Jul 2025229 PMAQI
27th Jul 20251910 PMAQI
27th Jul 20251911 PMAQI
28th Jul 20251912 AMAQI
28th Jul 2025191 AMAQI
28th Jul 2025212 AMAQI
28th Jul 2025233 AMAQI
28th Jul 2025254 AMAQI
24°C17/31°C
28th Jul 2025215 AMAQI
28th Jul 2025246 AMAQI
28th Jul 2025247 AMAQI
28th Jul 2025248 AMAQI
28th Jul 2025229 AMAQI
28th Jul 20252410 AMAQI
28th Jul 20252911 AMAQI
28th Jul 20253512 PMAQI
28th Jul 2025351 PMAQI
28th Jul 2025312 PMAQI
28th Jul 2025323 PMAQI
28th Jul 2025324 PMAQI
28th Jul 2025325 PMAQI
28th Jul 2025296 PMAQI
28th Jul 2025247 PMAQI
28th Jul 2025248 PMAQI
28th Jul 2025249 PMAQI
28th Jul 20252210 PMAQI
28th Jul 20252011 PMAQI
29th Jul 20252012 AMAQI
29th Jul 2025261 AMAQI
29th Jul 2025282 AMAQI
29th Jul 2025283 AMAQI
29th Jul 2025314 AMAQI
26°C19/34°C
29th Jul 2025305 AMAQI
29th Jul 2025366 AMAQI
29th Jul 2025327 AMAQI
29th Jul 2025328 AMAQI
29th Jul 2025349 AMAQI
29th Jul 20253110 AMAQI
29th Jul 20253511 AMAQI
29th Jul 20253812 PMAQI
29th Jul 2025381 PMAQI
29th Jul 2025352 PMAQI
29th Jul 2025333 PMAQI
29th Jul 2025284 PMAQI
29th Jul 2025255 PMAQI
29th Jul 2025296 PMAQI
29th Jul 2025317 PMAQI
29th Jul 2025308 PMAQI
29th Jul 2025289 PMAQI
29th Jul 20252810 PMAQI
29th Jul 20252411 PMAQI
30th Jul 20252412 AMAQI
30th Jul 2025241 AMAQI
30th Jul 2025252 AMAQI
30th Jul 2025263 AMAQI
30th Jul 2025254 AMAQI
27°C20/35°C
30th Jul 2025245 AMAQI
30th Jul 2025336 AMAQI
30th Jul 2025337 AMAQI
30th Jul 2025338 AMAQI
30th Jul 2025329 AMAQI
30th Jul 20253210 AMAQI
30th Jul 20253611 AMAQI
30th Jul 20253512 PMAQI
30th Jul 2025451 PMAQI
30th Jul 2025352 PMAQI
30th Jul 2025363 PMAQI
30th Jul 2025364 PMAQI
30th Jul 2025365 PMAQI
30th Jul 2025366 PMAQI
30th Jul 2025367 PMAQI
30th Jul 2025368 PMAQI
30th Jul 2025349 PMAQI
30th Jul 20253110 PMAQI
30th Jul 20252711 PMAQI
31st Jul 20252512 AMAQI
31st Jul 2025261 AMAQI
31st Jul 2025282 AMAQI
31st Jul 2025433 AMAQI
31st Jul 2025374 AMAQI
26°C20/34°C
31st Jul 2025445 AMAQI
31st Jul 2025356 AMAQI
31st Jul 2025357 AMAQI
31st Jul 2025388 AMAQI
31st Jul 2025319 AMAQI
31st Jul 20253610 AMAQI
31st Jul 20254111 AMAQI
31st Jul 20254412 PMAQI
31st Jul 2025481 PMAQI
31st Jul 2025472 PMAQI
31st Jul 2025423 PMAQI
31st Jul 2025414 PMAQI
31st Jul 2025425 PMAQI
31st Jul 2025416 PMAQI
31st Jul 2025387 PMAQI
31st Jul 2025298 PMAQI
31st Jul 2025309 PMAQI
31st Jul 20253710 PMAQI
31st Jul 20252811 PMAQI
1st Aug 20252512 AMAQI
1st Aug 2025271 AMAQI
1st Aug 2025282 AMAQI
1st Aug 2025343 AMAQI
1st Aug 2025364 AMAQI
27°C19/35°C
1st Aug 2025425 AMAQI
1st Aug 2025376 AMAQI
1st Aug 2025347 AMAQI
1st Aug 2025348 AMAQI
1st Aug 2025389 AMAQI
1st Aug 20254010 AMAQI
1st Aug 20254411 AMAQI
1st Aug 20254712 PMAQI
1st Aug 2025461 PMAQI
1st Aug 2025412 PMAQI
1st Aug 2025373 PMAQI
1st Aug 2025364 PMAQI
1st Aug 2025375 PMAQI
1st Aug 2025386 PMAQI
1st Aug 2025377 PMAQI
1st Aug 2025338 PMAQI
1st Aug 2025279 PMAQI
1st Aug 20252410 PMAQI
1st Aug 20252011 PMAQI
2nd Aug 20252612 AMAQI
2nd Aug 2025241 AMAQI
2nd Aug 2025302 AMAQI
2nd Aug 2025273 AMAQI
2nd Aug 2025284 AMAQI
27°C20/36°C
2nd Aug 2025315 AMAQI
2nd Aug 2025346 AMAQI
2nd Aug 2025377 AMAQI
2nd Aug 2025358 AMAQI
2nd Aug 2025299 AMAQI
2nd Aug 20253210 AMAQI
2nd Aug 20253811 AMAQI
2nd Aug 20254212 PMAQI
2nd Aug 2025421 PMAQI
2nd Aug 2025452 PMAQI
2nd Aug 2025413 PMAQI
2nd Aug 2025394 PMAQI
2nd Aug 2025465 PMAQI
2nd Aug 2025476 PMAQI
2nd Aug 2025367 PMAQI
2nd Aug 2025338 PMAQI
2nd Aug 2025329 PMAQI
2nd Aug 20253110 PMAQI
2nd Aug 20252811 PMAQI
3rd Aug 20252912 AMAQI
3rd Aug 2025281 AMAQI
3rd Aug 2025312 AMAQI
3rd Aug 2025323 AMAQI
3rd Aug 2025444 AMAQI
27°C19/35°C
3rd Aug 2025395 AMAQI
3rd Aug 2025416 AMAQI
3rd Aug 2025387 AMAQI
3rd Aug 2025378 AMAQI
3rd Aug 2025329 AMAQI
3rd Aug 20253610 AMAQI
3rd Aug 20253711 AMAQI
3rd Aug 20253512 PMAQI
3rd Aug 2025391 PMAQI
3rd Aug 2025372 PMAQI
3rd Aug 2025363 PMAQI
3rd Aug 2025364 PMAQI
3rd Aug 2025345 PMAQI
3rd Aug 2025416 PMAQI
3rd Aug 2025377 PMAQI
3rd Aug 2025378 PMAQI
3rd Aug 2025399 PMAQI
3rd Aug 20253810 PMAQI
3rd Aug 20253611 PMAQI
4th Aug 20253012 AMAQI
4th Aug 2025261 AMAQI
4th Aug 2025262 AMAQI
4th Aug 2025303 AMAQI
4th Aug 2025304 AMAQI
27°C19/34°C
4th Aug 2025325 AMAQI
4th Aug 2025296 AMAQI
4th Aug 2025297 AMAQI
4th Aug 2025298 AMAQI
4th Aug 2025279 AMAQI
4th Aug 20252910 AMAQI
4th Aug 20253811 AMAQI
4th Aug 20254812 PMAQI
4th Aug 2025541 PMAQI
4th Aug 2025582 PMAQI
4th Aug 2025673 PMAQI
4th Aug 2025404 PMAQI
4th Aug 2025355 PMAQI
4th Aug 2025326 PMAQI
4th Aug 2025337 PMAQI
4th Aug 2025358 PMAQI
4th Aug 2025349 PMAQI
4th Aug 20253610 PMAQI
4th Aug 20254411 PMAQI
5th Aug 20254112 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025442 AMAQI
5th Aug 2025403 AMAQI
5th Aug 2025444 AMAQI
25°C18/31°C
5th Aug 2025425 AMAQI
5 AM5th Aug 2025406 AMAQI
5th Aug 2025367 AMAQI
5th Aug 2025398 AMAQI
5th Aug 2025369 AMAQI
5th Aug 20253810 AMAQI
5th Aug 20253811 AMAQI
5th Aug 20253812 PMAQI
12 PM5th Aug 2025381 PMAQI
5th Aug 2025352 PMAQI
5th Aug 2025323 PMAQI
5th Aug 2025304 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 3 PM
41AQI
5 hours / Day
150 hours / Month
Avg. Lowest Time
5 AM - 9 AM
34AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 3 PM (Avg. 41), while the lowest AQI was between 5 AM to 9 AM (Avg. 34).
Night time
Avg. Highest Time
12 AM - 11 PM
32AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
32AQI
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. 32), while the lowest AQI was between 12 AM to 11 PM (Avg. 32).
2025 Days Vs Air Quality
Grass Valley, California, United States
2025
97%
210
3%
6
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
210 DaysModerate
6 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2025, 97% of 217 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
Grass Valley, 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
29AQI
29AQI
2nd January 2025
29AQI
29AQI
3rd January 2025
31AQI
31AQI
4th January 2025
26AQI
26AQI
5th January 2025
27AQI
27AQI
6th January 2025
24AQI
24AQI
7th January 2025
34AQI
34AQI
8th January 2025
28AQI
28AQI
9th January 2025
30AQI
30AQI
10th January 2025
29AQI
29AQI
11th January 2025
33AQI
33AQI
12th January 2025
28AQI
28AQI
13th January 2025
28AQI
28AQI
14th January 2025
30AQI
30AQI
15th January 2025
37AQI
37AQI
16th January 2025
31AQI
31AQI
17th January 2025
35AQI
35AQI
18th January 2025
43AQI
43AQI
19th January 2025
46AQI
46AQI
20th January 2025
33AQI
33AQI
21st January 2025
31AQI
31AQI
22nd January 2025
32AQI
32AQI
23rd January 2025
33AQI
33AQI
24th January 2025
33AQI
33AQI
25th January 2025
36AQI
36AQI
26th January 2025
28AQI
28AQI
27th January 2025
31AQI
31AQI
28th January 2025
40AQI
40AQI
29th January 2025
52AQI
52AQI
30th January 2025
57AQI
57AQI
31st January 2025
47AQI
47AQI
1st February 2025
24AQI
24AQI
2nd February 2025
25AQI
25AQI
3rd February 2025
24AQI
24AQI
4th February 2025
27AQI
27AQI
5th February 2025
27AQI
27AQI
6th February 2025
27AQI
27AQI
7th February 2025
36AQI
36AQI
8th February 2025
27AQI
27AQI
9th February 2025
29AQI
29AQI
10th February 2025
30AQI
30AQI
11th February 2025
32AQI
32AQI
12th February 2025
34AQI
34AQI
13th February 2025
29AQI
29AQI
14th February 2025
28AQI
28AQI
15th February 2025
28AQI
28AQI
16th February 2025
29AQI
29AQI
17th February 2025
29AQI
29AQI
18th February 2025
28AQI
28AQI
19th February 2025
28AQI
28AQI
20th February 2025
28AQI
28AQI
21st February 2025
30AQI
30AQI
22nd February 2025
30AQI
30AQI
23rd February 2025
29AQI
29AQI
24th February 2025
28AQI
28AQI
25th February 2025
28AQI
28AQI
26th February 2025
31AQI
31AQI
27th February 2025
34AQI
34AQI
28th February 2025
32AQI
32AQI
1st March 2025
31AQI
31AQI
2nd March 2025
27AQI
27AQI
3rd March 2025
26AQI
26AQI
4th March 2025
30AQI
30AQI
5th March 2025
29AQI
29AQI
6th March 2025
26AQI
26AQI
7th March 2025
28AQI
28AQI
8th March 2025
30AQI
30AQI
9th March 2025
29AQI
29AQI
10th March 2025
31AQI
31AQI
11th March 2025
33AQI
33AQI
12th March 2025
29AQI
29AQI
13th March 2025
21AQI
21AQI
14th March 2025
17AQI
17AQI
15th March 2025
26AQI
26AQI
16th March 2025
30AQI
30AQI
17th March 2025
16AQI
16AQI
18th March 2025
18AQI
18AQI
19th March 2025
20AQI
20AQI
20th March 2025
20AQI
20AQI
21st March 2025
20AQI
20AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
21AQI
21AQI
24th March 2025
22AQI
22AQI
25th March 2025
22AQI
22AQI
26th March 2025
29AQI
29AQI
27th March 2025
24AQI
24AQI
28th March 2025
26AQI
26AQI
29th March 2025
23AQI
23AQI
30th March 2025
28AQI
28AQI
31st March 2025
25AQI
25AQI
1st April 2025
20AQI
20AQI
2nd April 2025
19AQI
19AQI
3rd April 2025
21AQI
21AQI
4th April 2025
21AQI
21AQI
5th April 2025
17AQI
17AQI
6th April 2025
26AQI
26AQI
7th April 2025
19AQI
19AQI
8th April 2025
20AQI
20AQI
9th April 2025
20AQI
20AQI
10th April 2025
21AQI
21AQI
11th April 2025
26AQI
26AQI
12th April 2025
25AQI
25AQI
13th April 2025
27AQI
27AQI
14th April 2025
24AQI
24AQI
15th April 2025
31AQI
31AQI
16th April 2025
34AQI
34AQI
17th April 2025
31AQI
31AQI
18th April 2025
30AQI
30AQI
19th April 2025
23AQI
23AQI
20th April 2025
28AQI
28AQI
21st April 2025
25AQI
25AQI
22nd April 2025
36AQI
36AQI
23rd April 2025
30AQI
30AQI
24th April 2025
37AQI
37AQI
25th April 2025
30AQI
30AQI
26th April 2025
36AQI
36AQI
27th April 2025
23AQI
23AQI
28th April 2025
20AQI
20AQI
29th April 2025
28AQI
28AQI
30th April 2025
37AQI
37AQI
1st May 2025
24AQI
24AQI
2nd May 2025
29AQI
29AQI
3rd May 2025
28AQI
28AQI
4th May 2025
20AQI
20AQI
5th May 2025
17AQI
17AQI
6th May 2025
18AQI
18AQI
7th May 2025
26AQI
26AQI
8th May 2025
35AQI
35AQI
9th May 2025
30AQI
30AQI
10th May 2025
25AQI
25AQI
11th May 2025
22AQI
22AQI
12th May 2025
22AQI
22AQI
13th May 2025
24AQI
24AQI
14th May 2025
20AQI
20AQI
15th May 2025
19AQI
19AQI
16th May 2025
21AQI
21AQI
17th May 2025
28AQI
28AQI
18th May 2025
27AQI
27AQI
19th May 2025
21AQI
21AQI
20th May 2025
17AQI
17AQI
21st May 2025
21AQI
21AQI
22nd May 2025
23AQI
23AQI
23rd May 2025
23AQI
23AQI
24th May 2025
30AQI
30AQI
25th May 2025
30AQI
30AQI
26th May 2025
23AQI
23AQI
27th May 2025
23AQI
23AQI
28th May 2025
30AQI
30AQI
29th May 2025
32AQI
32AQI
30th May 2025
35AQI
35AQI
31st May 2025
39AQI
39AQI
1st June 2025
31AQI
31AQI
2nd June 2025
30AQI
30AQI
3rd June 2025
42AQI
42AQI
4th June 2025
37AQI
37AQI
5th June 2025
36AQI
36AQI
6th June 2025
37AQI
37AQI
7th June 2025
40AQI
40AQI
8th June 2025
40AQI
40AQI
9th June 2025
34AQI
34AQI
10th June 2025
41AQI
41AQI
11th June 2025
41AQI
41AQI
12th June 2025
40AQI
40AQI
13th June 2025
42AQI
42AQI
14th June 2025
40AQI
40AQI
15th June 2025
38AQI
38AQI
16th June 2025
37AQI
37AQI
17th June 2025
38AQI
38AQI
18th June 2025
36AQI
36AQI
19th June 2025
30AQI
30AQI
20th June 2025
36AQI
36AQI
21st June 2025
33AQI
33AQI
22nd June 2025
30AQI
30AQI
23rd June 2025
26AQI
26AQI
24th June 2025
28AQI
28AQI
25th June 2025
33AQI
33AQI
26th June 2025
38AQI
38AQI
27th June 2025
43AQI
43AQI
28th June 2025
44AQI
44AQI
29th June 2025
45AQI
45AQI
30th June 2025
43AQI
43AQI
1st July 2025
37AQI
37AQI
2nd July 2025
38AQI
38AQI
3rd July 2025
41AQI
41AQI
4th July 2025
30AQI
30AQI
5th July 2025
29AQI
29AQI
6th July 2025
28AQI
28AQI
7th July 2025
27AQI
27AQI
8th July 2025
30AQI
30AQI
9th July 2025
29AQI
29AQI
10th July 2025
36AQI
36AQI
11th July 2025
53AQI
53AQI
12th July 2025
59AQI
59AQI
13th July 2025
62AQI
62AQI
14th July 2025
53AQI
53AQI
15th July 2025
49AQI
49AQI
16th July 2025
42AQI
42AQI
17th July 2025
37AQI
37AQI
18th July 2025
38AQI
38AQI
19th July 2025
36AQI
36AQI
20th July 2025
36AQI
36AQI
21st July 2025
29AQI
29AQI
22nd July 2025
24AQI
24AQI
23rd July 2025
22AQI
22AQI
24th July 2025
23AQI
23AQI
25th July 2025
24AQI
24AQI
26th July 2025
24AQI
24AQI
27th July 2025
25AQI
25AQI
28th July 2025
25AQI
25AQI
29th July 2025
30AQI
30AQI
30th July 2025
31AQI
31AQI
31st July 2025
37AQI
37AQI
1st August 2025
35AQI
35AQI
2nd August 2025
34AQI
34AQI
3rd August 2025
36AQI
36AQI
4th August 2025
33AQI
33AQI
34AQI
29AQI
25AQI
26AQI
25AQI
37AQI
35AQI
35AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202530AQI
29
2
28
31
30
31
30
27
4
4
210
6
Highest AQI recorded in
June37AQI
Lowest AQI recorded in
March25AQI
202433AQI
31
29
31
30
31
29
30
1
23
8
29
1
31
29
1
31
354
11
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
January22AQI
202338AQI
31
24
4
30
1
30
29
2
27
3
22
9
27
4
26
4
28
2
29
31
334
29
Highest AQI recorded in
July47AQI
Lowest AQI recorded in
December27AQI
202236AQI
29
1
22
31
17
31
29
1
17
4
1
2
18
7
3
1
29
2
29
1
31
284
18
3
1
Highest AQI recorded in
September56AQI
Lowest AQI recorded in
March28AQI
202139AQI
30
28
31
29
1
31
29
1
24
7
9
6
11
4
1
15
15
29
2
29
1
29
313
33
11
4
1
Highest AQI recorded in
August100AQI
Lowest AQI recorded in
January26AQI
202049AQI
1
12
19
30
31
16
3
7
5
7
7
12
2
1
21
6
2
30
31
198
16
21
5
2
1
Highest AQI recorded in
September107AQI
Lowest AQI recorded in
March26AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
49AQILeast Polluted Year Recorded
2025(Avg.)
30AQIGrass Valley's annual 2025 AQI (30) shows an average percentage change of -20.8% (improved AQI) compared to previous years: 2020 (49), 2021 (39), 2022 (36), 2023 (38), 2024 (33).
