Healdsburg, 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+
October Air Quality Analysis
Healdsburg, California, United States
2021
2022
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
11th Oct 2022
74AQILowest AQI recorded on
24th Oct 2021
13AQISame Day Analysis (27th October ):
On this day, AQI across the 4 years varied significantly: 2025 ranks 3rd highest AQI at 20 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 27th Oct - 28th Oct 2025
Healdsburg, California, United States
AQI
Day
Night
.
7 AM27th Oct 2025
6 PM
6 AM28th Oct 2025
Day time
Avg. Highest Time
11AM27th Oct
30AQI
Avg. Lowest Time
1PM27th Oct
11AQI
Night time
Avg. Highest Time
5AM28th Oct
40AQI
Avg. Lowest Time
7PM27th Oct
15AQI
In the last 24 hours,
Healdsburg's AQI reached its highest point of 40 at 5 AM during the Night, while the lowest point, 11, was recorded at 1 PM during the Day between 27th Oct and 28th Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Healdsburg, California, United States
SepOct
28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 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
Day
Night
28th Sep 2025637 AMAQI
28th Sep 2025608 AMAQI
28th Sep 2025579 AMAQI
28th Sep 20256010 AMAQI
28th Sep 20256011 AMAQI
28th Sep 20256812 PMAQI
28th Sep 20251001 PMAQI
28th Sep 2025982 PMAQI
28th Sep 20251053 PMAQI
28th Sep 2025984 PMAQI
28th Sep 2025945 PMAQI
28th Sep 2025896 PMAQI
28th Sep 2025707 PMAQI
28th Sep 2025618 PMAQI
28th Sep 2025589 PMAQI
28th Sep 20255810 PMAQI
28th Sep 20255811 PMAQI
29th Sep 20255812 AMAQI
29th Sep 2025561 AMAQI
29th Sep 2025512 AMAQI
29th Sep 2025413 AMAQI
29th Sep 2025344 AMAQI
29th Sep 2025425 AMAQI
29th Sep 2025496 AMAQI
19°C15/24°C
29th Sep 2025527 AMAQI
29th Sep 2025488 AMAQI
29th Sep 2025499 AMAQI
29th Sep 20254810 AMAQI
29th Sep 20254811 AMAQI
29th Sep 20253812 PMAQI
29th Sep 2025451 PMAQI
29th Sep 2025482 PMAQI
29th Sep 2025433 PMAQI
29th Sep 2025474 PMAQI
29th Sep 2025325 PMAQI
29th Sep 2025276 PMAQI
29th Sep 2025267 PMAQI
29th Sep 2025198 PMAQI
29th Sep 2025169 PMAQI
29th Sep 20251710 PMAQI
29th Sep 20251611 PMAQI
30th Sep 20251612 AMAQI
30th Sep 2025191 AMAQI
30th Sep 2025212 AMAQI
30th Sep 2025183 AMAQI
30th Sep 2025144 AMAQI
30th Sep 2025145 AMAQI
30th Sep 2025166 AMAQI
18°C17/22°C
30th Sep 2025157 AMAQI
30th Sep 2025188 AMAQI
30th Sep 2025189 AMAQI
30th Sep 20251310 AMAQI
30th Sep 20251711 AMAQI
30th Sep 20251812 PMAQI
30th Sep 2025121 PMAQI
30th Sep 2025112 PMAQI
30th Sep 2025123 PMAQI
30th Sep 2025114 PMAQI
30th Sep 2025155 PMAQI
30th Sep 2025156 PMAQI
30th Sep 2025157 PMAQI
30th Sep 2025168 PMAQI
30th Sep 2025169 PMAQI
30th Sep 20251810 PMAQI
30th Sep 20251711 PMAQI
1st Oct 20252012 AMAQI
1st Oct 2025181 AMAQI
1st Oct 2025172 AMAQI
1st Oct 2025163 AMAQI
1st Oct 2025134 AMAQI
1st Oct 2025135 AMAQI
1st Oct 2025156 AMAQI
18°C16/23°C
1st Oct 2025177 AMAQI
1st Oct 2025178 AMAQI
1st Oct 2025209 AMAQI
1st Oct 20252210 AMAQI
1st Oct 20252411 AMAQI
1st Oct 20252312 PMAQI
1st Oct 2025221 PMAQI
1st Oct 2025202 PMAQI
1st Oct 2025213 PMAQI
1st Oct 2025194 PMAQI
1st Oct 2025215 PMAQI
1st Oct 2025196 PMAQI
1st Oct 2025317 PMAQI
1st Oct 2025218 PMAQI
1st Oct 2025209 PMAQI
1st Oct 20251910 PMAQI
1st Oct 20251911 PMAQI
2nd Oct 20252112 AMAQI
2nd Oct 2025351 AMAQI
2nd Oct 2025392 AMAQI
2nd Oct 2025253 AMAQI
2nd Oct 2025204 AMAQI
2nd Oct 2025195 AMAQI
2nd Oct 2025216 AMAQI
17°C16/20°C
2nd Oct 2025207 AMAQI
2nd Oct 2025208 AMAQI
2nd Oct 2025229 AMAQI
2nd Oct 20252810 AMAQI
2nd Oct 20253511 AMAQI
2nd Oct 20252112 PMAQI
2nd Oct 2025201 PMAQI
2nd Oct 2025182 PMAQI
2nd Oct 2025183 PMAQI
2nd Oct 2025184 PMAQI
2nd Oct 2025185 PMAQI
2nd Oct 2025286 PMAQI
2nd Oct 2025427 PMAQI
2nd Oct 2025288 PMAQI
2nd Oct 2025259 PMAQI
2nd Oct 20254210 PMAQI
2nd Oct 20254711 PMAQI
3rd Oct 20254812 AMAQI
3rd Oct 2025351 AMAQI
3rd Oct 2025352 AMAQI
3rd Oct 2025363 AMAQI
3rd Oct 2025274 AMAQI
3rd Oct 2025245 AMAQI
3rd Oct 2025256 AMAQI
17°C13/23°C
3rd Oct 2025287 AMAQI
3rd Oct 2025268 AMAQI
3rd Oct 2025239 AMAQI
3rd Oct 20252810 AMAQI
3rd Oct 20253011 AMAQI
3rd Oct 20254012 PMAQI
3rd Oct 2025431 PMAQI
3rd Oct 2025502 PMAQI
3rd Oct 2025433 PMAQI
3rd Oct 2025244 PMAQI
3rd Oct 2025255 PMAQI
3rd Oct 2025286 PMAQI
3rd Oct 2025417 PMAQI
3rd Oct 2025458 PMAQI
3rd Oct 2025539 PMAQI
3rd Oct 20255310 PMAQI
3rd Oct 20255311 PMAQI
4th Oct 20255112 AMAQI
4th Oct 2025461 AMAQI
4th Oct 2025512 AMAQI
4th Oct 2025523 AMAQI
4th Oct 2025514 AMAQI
4th Oct 2025535 AMAQI
4th Oct 2025526 AMAQI
18°C12/24°C
4th Oct 2025277 AMAQI
4th Oct 2025278 AMAQI
4th Oct 2025339 AMAQI
4th Oct 20252610 AMAQI
4th Oct 20253011 AMAQI
4th Oct 20255112 PMAQI
4th Oct 2025561 PMAQI
4th Oct 2025562 PMAQI
4th Oct 2025493 PMAQI
4th Oct 2025384 PMAQI
4th Oct 2025465 PMAQI
4th Oct 2025396 PMAQI
4th Oct 2025437 PMAQI
4th Oct 2025528 PMAQI
4th Oct 2025539 PMAQI
4th Oct 20253610 PMAQI
4th Oct 20252711 PMAQI
5th Oct 20254512 AMAQI
5th Oct 2025291 AMAQI
5th Oct 2025322 AMAQI
5th Oct 2025543 AMAQI
5th Oct 2025544 AMAQI
5th Oct 2025515 AMAQI
5th Oct 2025516 AMAQI
19°C11/30°C
5th Oct 2025397 AMAQI
5th Oct 2025368 AMAQI
5th Oct 2025369 AMAQI
5th Oct 20254110 AMAQI
5th Oct 20253911 AMAQI
5th Oct 20254112 PMAQI
5th Oct 2025461 PMAQI
5th Oct 2025512 PMAQI
5th Oct 2025563 PMAQI
5th Oct 2025544 PMAQI
5th Oct 2025485 PMAQI
5th Oct 2025396 PMAQI
5th Oct 2025227 PMAQI
5th Oct 2025228 PMAQI
5th Oct 2025349 PMAQI
5th Oct 20255810 PMAQI
5th Oct 20255511 PMAQI
6th Oct 20255212 AMAQI
6th Oct 2025411 AMAQI
6th Oct 2025412 AMAQI
6th Oct 2025423 AMAQI
6th Oct 2025494 AMAQI
6th Oct 2025505 AMAQI
6th Oct 2025406 AMAQI
19°C10/31°C
6th Oct 2025407 AMAQI
6th Oct 2025388 AMAQI
6th Oct 2025279 AMAQI
6th Oct 20252410 AMAQI
7th Oct 2025254 AMAQI
7th Oct 2025285 AMAQI
7th Oct 2025526 AMAQI
22°C12/35°C
7th Oct 2025477 AMAQI
7th Oct 2025508 AMAQI
7th Oct 2025499 AMAQI
7th Oct 20253210 AMAQI
7th Oct 20253311 AMAQI
7th Oct 20255212 PMAQI
7th Oct 2025481 PMAQI
7th Oct 2025522 PMAQI
7th Oct 2025563 PMAQI
7th Oct 2025544 PMAQI
7th Oct 2025455 PMAQI
7th Oct 2025426 PMAQI
7th Oct 2025467 PMAQI
7th Oct 2025598 PMAQI
7th Oct 2025549 PMAQI
7th Oct 20254510 PMAQI
7th Oct 20254211 PMAQI
8th Oct 20254912 AMAQI
8th Oct 2025531 AMAQI
8th Oct 2025552 AMAQI
8th Oct 2025563 AMAQI
8th Oct 2025504 AMAQI
8th Oct 2025475 AMAQI
8th Oct 2025406 AMAQI
23°C13/35°C
8th Oct 2025417 AMAQI
8th Oct 2025468 AMAQI
8th Oct 2025489 AMAQI
8th Oct 20254310 AMAQI
8th Oct 20254411 AMAQI
8th Oct 20254912 PMAQI
8th Oct 2025501 PMAQI
8th Oct 2025472 PMAQI
8th Oct 2025513 PMAQI
8th Oct 2025574 PMAQI
8th Oct 2025535 PMAQI
8th Oct 2025466 PMAQI
8th Oct 2025427 PMAQI
8th Oct 2025428 PMAQI
8th Oct 2025539 PMAQI
8th Oct 20255210 PMAQI
8th Oct 20254311 PMAQI
9th Oct 20254312 AMAQI
9th Oct 2025541 AMAQI
9th Oct 2025282 AMAQI
9th Oct 2025483 AMAQI
9th Oct 2025484 AMAQI
9th Oct 2025485 AMAQI
9th Oct 2025466 AMAQI
16°C12/21°C
9th Oct 2025467 AMAQI
9th Oct 2025388 AMAQI
9th Oct 2025219 AMAQI
9th Oct 20252410 AMAQI
9th Oct 20252911 AMAQI
9th Oct 20254312 PMAQI
9th Oct 2025511 PMAQI
9th Oct 2025412 PMAQI
9th Oct 2025403 PMAQI
9th Oct 2025454 PMAQI
9th Oct 2025435 PMAQI
9th Oct 2025486 PMAQI
9th Oct 2025487 PMAQI
9th Oct 2025408 PMAQI
9th Oct 2025409 PMAQI
9th Oct 20253410 PMAQI
9th Oct 20255711 PMAQI
10th Oct 20255612 AMAQI
10th Oct 2025561 AMAQI
10th Oct 2025252 AMAQI
10th Oct 2025213 AMAQI
10th Oct 2025294 AMAQI
10th Oct 2025435 AMAQI
10th Oct 2025376 AMAQI
17°C14/21°C
10th Oct 2025227 AMAQI
10th Oct 2025248 AMAQI
10th Oct 2025269 AMAQI
10th Oct 20254710 AMAQI
10th Oct 20255411 AMAQI
10th Oct 20252412 PMAQI
10th Oct 2025261 PMAQI
10th Oct 2025322 PMAQI
10th Oct 2025403 PMAQI
10th Oct 2025244 PMAQI
10th Oct 2025225 PMAQI
10th Oct 2025266 PMAQI
10th Oct 2025187 PMAQI
10th Oct 2025238 PMAQI
10th Oct 2025249 PMAQI
10th Oct 20252310 PMAQI
10th Oct 20252311 PMAQI
11th Oct 20253612 AMAQI
11th Oct 2025421 AMAQI
11th Oct 2025222 AMAQI
11th Oct 2025233 AMAQI
11th Oct 2025204 AMAQI
11th Oct 2025235 AMAQI
11th Oct 2025176 AMAQI
15°C9/23°C
11th Oct 2025187 AMAQI
11th Oct 2025258 AMAQI
11th Oct 2025259 AMAQI
11th Oct 20252410 AMAQI
11th Oct 20252611 AMAQI
11th Oct 20252812 PMAQI
11th Oct 2025261 PMAQI
11th Oct 2025262 PMAQI
11th Oct 2025293 PMAQI
11th Oct 2025264 PMAQI
11th Oct 2025245 PMAQI
11th Oct 2025256 PMAQI
11th Oct 2025297 PMAQI
11th Oct 2025378 PMAQI
11th Oct 2025449 PMAQI
11th Oct 20254910 PMAQI
11th Oct 20254711 PMAQI
12th Oct 20254412 AMAQI
12th Oct 2025471 AMAQI
12th Oct 2025472 AMAQI
12th Oct 2025473 AMAQI
12th Oct 2025464 AMAQI
12th Oct 2025425 AMAQI
12th Oct 2025196 AMAQI
16°C9/26°C
12th Oct 2025207 AMAQI
12th Oct 2025358 AMAQI
12th Oct 2025399 AMAQI
12th Oct 20253810 AMAQI
12th Oct 20254111 AMAQI
12th Oct 20252812 PMAQI
12th Oct 2025251 PMAQI
12th Oct 2025252 PMAQI
12th Oct 2025253 PMAQI
12th Oct 2025254 PMAQI
12th Oct 2025265 PMAQI
12th Oct 2025276 PMAQI
12th Oct 2025287 PMAQI
12th Oct 2025348 PMAQI
12th Oct 2025559 PMAQI
12th Oct 20255810 PMAQI
12th Oct 20255511 PMAQI
13th Oct 20255112 AMAQI
13th Oct 2025501 AMAQI
13th Oct 2025462 AMAQI
13th Oct 2025443 AMAQI
13th Oct 2025514 AMAQI
13th Oct 2025495 AMAQI
13th Oct 2025496 AMAQI
17°C8/28°C
13th Oct 2025497 AMAQI
13th Oct 2025468 AMAQI
13th Oct 2025379 AMAQI
13th Oct 20253010 AMAQI
13th Oct 20253211 AMAQI
13th Oct 20253812 PMAQI
13th Oct 2025441 PMAQI
13th Oct 2025282 PMAQI
13th Oct 2025303 PMAQI
13th Oct 2025384 PMAQI
13th Oct 2025525 PMAQI
13th Oct 2025496 PMAQI
13th Oct 2025627 PMAQI
13th Oct 2025508 PMAQI
13th Oct 2025499 PMAQI
13th Oct 20256310 PMAQI
13th Oct 20256711 PMAQI
14th Oct 20252512 AMAQI
14th Oct 2025461 AMAQI
14th Oct 2025532 AMAQI
14th Oct 2025503 AMAQI
14th Oct 2025254 AMAQI
14th Oct 2025265 AMAQI
14th Oct 2025246 AMAQI
12°C10/15°C
14th Oct 2025267 AMAQI
14th Oct 2025298 AMAQI
14th Oct 2025289 AMAQI
14th Oct 20253210 AMAQI
14th Oct 20252811 AMAQI
14th Oct 20253612 PMAQI
14th Oct 2025371 PMAQI
14th Oct 2025292 PMAQI
14th Oct 2025293 PMAQI
14th Oct 2025314 PMAQI
14th Oct 2025285 PMAQI
14th Oct 2025306 PMAQI
14th Oct 2025317 PMAQI
14th Oct 2025288 PMAQI
14th Oct 2025299 PMAQI
14th Oct 20254810 PMAQI
14th Oct 20255511 PMAQI
15th Oct 20255412 AMAQI
15th Oct 2025371 AMAQI
15th Oct 2025382 AMAQI
15th Oct 2025383 AMAQI
15th Oct 2025264 AMAQI
15th Oct 2025385 AMAQI
15th Oct 2025386 AMAQI
12°C9/16°C
15th Oct 2025407 AMAQI
15th Oct 2025338 AMAQI
15th Oct 2025209 AMAQI
15th Oct 20252410 AMAQI
15th Oct 20252611 AMAQI
15th Oct 20253112 PMAQI
15th Oct 2025261 PMAQI
15th Oct 2025282 PMAQI
15th Oct 2025273 PMAQI
15th Oct 2025284 PMAQI
15th Oct 2025275 PMAQI
15th Oct 2025256 PMAQI
15th Oct 2025247 PMAQI
15th Oct 2025268 PMAQI
15th Oct 2025349 PMAQI
15th Oct 20253910 PMAQI
15th Oct 20253811 PMAQI
16th Oct 20254112 AMAQI
16th Oct 2025441 AMAQI
16th Oct 2025502 AMAQI
16th Oct 2025383 AMAQI
16th Oct 2025454 AMAQI
16th Oct 2025465 AMAQI
16th Oct 2025516 AMAQI
15°C12/18°C
16th Oct 2025517 AMAQI
16th Oct 2025318 AMAQI
16th Oct 2025279 AMAQI
16th Oct 20252810 AMAQI
16th Oct 20252411 AMAQI
16th Oct 20252912 PMAQI
16th Oct 2025431 PMAQI
16th Oct 2025452 PMAQI
16th Oct 2025513 PMAQI
16th Oct 2025354 PMAQI
16th Oct 2025415 PMAQI
16th Oct 2025476 PMAQI
16th Oct 2025427 PMAQI
16th Oct 2025488 PMAQI
16th Oct 2025519 PMAQI
16th Oct 20255610 PMAQI
16th Oct 20256411 PMAQI
17th Oct 20254912 AMAQI
17th Oct 2025381 AMAQI
17th Oct 2025442 AMAQI
17th Oct 2025433 AMAQI
17th Oct 2025424 AMAQI
17th Oct 2025395 AMAQI
17th Oct 2025356 AMAQI
15°C8/25°C
17th Oct 2025517 AMAQI
17th Oct 2025468 AMAQI
17th Oct 2025459 AMAQI
17th Oct 20255010 AMAQI
17th Oct 20255511 AMAQI
17th Oct 20255712 PMAQI
17th Oct 2025571 PMAQI
17th Oct 2025492 PMAQI
17th Oct 2025493 PMAQI
17th Oct 2025524 PMAQI
17th Oct 2025515 PMAQI
17th Oct 2025476 PMAQI
17th Oct 2025567 PMAQI
17th Oct 2025528 PMAQI
17th Oct 2025509 PMAQI
17th Oct 20255610 PMAQI
17th Oct 20254311 PMAQI
18th Oct 20254612 AMAQI
18th Oct 2025531 AMAQI
18th Oct 2025582 AMAQI
18th Oct 2025633 AMAQI
18th Oct 2025634 AMAQI
18th Oct 2025615 AMAQI
18th Oct 2025636 AMAQI
16°C8/28°C
18th Oct 2025587 AMAQI
18th Oct 2025518 AMAQI
18th Oct 2025559 AMAQI
18th Oct 20255510 AMAQI
18th Oct 20255111 AMAQI
18th Oct 20254812 PMAQI
18th Oct 2025581 PMAQI
18th Oct 2025532 PMAQI
18th Oct 2025463 PMAQI
18th Oct 2025434 PMAQI
18th Oct 2025525 PMAQI
18th Oct 2025486 PMAQI
18th Oct 2025527 PMAQI
18th Oct 2025508 PMAQI
18th Oct 2025499 PMAQI
18th Oct 20255110 PMAQI
18th Oct 20255511 PMAQI
19th Oct 20255712 AMAQI
19th Oct 2025571 AMAQI
19th Oct 2025572 AMAQI
19th Oct 2025573 AMAQI
19th Oct 2025604 AMAQI
19th Oct 2025595 AMAQI
19th Oct 2025576 AMAQI
19°C10/29°C
19th Oct 2025547 AMAQI
19th Oct 2025478 AMAQI
19th Oct 2025419 AMAQI
19th Oct 20254310 AMAQI
19th Oct 20253611 AMAQI
19th Oct 20256112 PMAQI
19th Oct 2025591 PMAQI
19th Oct 2025602 PMAQI
19th Oct 2025563 PMAQI
19th Oct 2025544 PMAQI
19th Oct 2025545 PMAQI
19th Oct 2025566 PMAQI
19th Oct 2025547 PMAQI
19th Oct 2025528 PMAQI
19th Oct 2025559 PMAQI
19th Oct 20255610 PMAQI
19th Oct 20254211 PMAQI
20th Oct 20252612 AMAQI
20th Oct 2025231 AMAQI
20th Oct 2025212 AMAQI
20th Oct 2025223 AMAQI
20th Oct 2025234 AMAQI
20th Oct 2025225 AMAQI
20th Oct 2025226 AMAQI
17°C9/28°C
20th Oct 2025237 AMAQI
20th Oct 2025238 AMAQI
20th Oct 2025249 AMAQI
20th Oct 20254010 AMAQI
20th Oct 20256011 AMAQI
20th Oct 20254912 PMAQI
20th Oct 2025241 PMAQI
20th Oct 2025252 PMAQI
20th Oct 2025303 PMAQI
20th Oct 2025264 PMAQI
20th Oct 2025255 PMAQI
20th Oct 2025256 PMAQI
20th Oct 2025287 PMAQI
20th Oct 2025248 PMAQI
20th Oct 2025259 PMAQI
20th Oct 20252410 PMAQI
20th Oct 20254211 PMAQI
21st Oct 20255612 AMAQI
21st Oct 2025521 AMAQI
21st Oct 2025422 AMAQI
21st Oct 2025483 AMAQI
21st Oct 2025624 AMAQI
21st Oct 2025455 AMAQI
21st Oct 2025416 AMAQI
19°C10/31°C
21st Oct 2025327 AMAQI
21st Oct 2025268 AMAQI
21st Oct 2025289 AMAQI
21st Oct 20252810 AMAQI
21st Oct 20253511 AMAQI
21st Oct 20253312 PMAQI
21st Oct 2025251 PMAQI
21st Oct 2025172 PMAQI
21st Oct 2025313 PMAQI
21st Oct 2025564 PMAQI
21st Oct 2025425 PMAQI
21st Oct 2025276 PMAQI
21st Oct 2025437 PMAQI
21st Oct 2025468 PMAQI
21st Oct 2025349 PMAQI
21st Oct 20253910 PMAQI
21st Oct 20254011 PMAQI
22nd Oct 20253912 AMAQI
22nd Oct 2025381 AMAQI
22nd Oct 2025352 AMAQI
22nd Oct 2025303 AMAQI
22nd Oct 2025284 AMAQI
22nd Oct 2025295 AMAQI
22nd Oct 2025306 AMAQI
18°C10/30°C
22nd Oct 2025287 AMAQI
22nd Oct 2025258 AMAQI
22nd Oct 2025309 AMAQI
22nd Oct 20252710 AMAQI
22nd Oct 20252611 AMAQI
22nd Oct 20253012 PMAQI
22nd Oct 2025281 PMAQI
22nd Oct 2025282 PMAQI
22nd Oct 2025353 PMAQI
22nd Oct 2025474 PMAQI
22nd Oct 2025465 PMAQI
22nd Oct 2025446 PMAQI
22nd Oct 2025487 PMAQI
22nd Oct 2025518 PMAQI
22nd Oct 2025449 PMAQI
22nd Oct 20253810 PMAQI
22nd Oct 20253411 PMAQI
23rd Oct 20253112 AMAQI
23rd Oct 2025301 AMAQI
23rd Oct 2025302 AMAQI
23rd Oct 2025283 AMAQI
23rd Oct 2025294 AMAQI
23rd Oct 2025265 AMAQI
23rd Oct 2025296 AMAQI
17°C12/24°C
23rd Oct 2025297 AMAQI
23rd Oct 2025308 AMAQI
23rd Oct 2025379 AMAQI
23rd Oct 20252910 AMAQI
23rd Oct 20252211 AMAQI
23rd Oct 20252712 PMAQI
23rd Oct 2025331 PMAQI
23rd Oct 2025322 PMAQI
23rd Oct 2025383 PMAQI
23rd Oct 2025404 PMAQI
23rd Oct 2025325 PMAQI
23rd Oct 2025326 PMAQI
23rd Oct 2025337 PMAQI
23rd Oct 2025308 PMAQI
23rd Oct 2025309 PMAQI
23rd Oct 20253210 PMAQI
23rd Oct 20253411 PMAQI
24th Oct 20253212 AMAQI
24th Oct 2025291 AMAQI
24th Oct 2025332 AMAQI
24th Oct 2025383 AMAQI
24th Oct 2025284 AMAQI
24th Oct 2025255 AMAQI
24th Oct 2025256 AMAQI
15°C8/27°C
24th Oct 2025337 AMAQI
24th Oct 2025358 AMAQI
24th Oct 2025389 AMAQI
24th Oct 20254810 AMAQI
24th Oct 20253511 AMAQI
24th Oct 20253212 PMAQI
24th Oct 2025281 PMAQI
24th Oct 2025322 PMAQI
24th Oct 2025363 PMAQI
24th Oct 2025304 PMAQI
24th Oct 2025235 PMAQI
24th Oct 2025216 PMAQI
24th Oct 2025237 PMAQI
24th Oct 2025208 PMAQI
24th Oct 2025189 PMAQI
24th Oct 20251710 PMAQI
24th Oct 20251711 PMAQI
25th Oct 20251512 AMAQI
25th Oct 2025131 AMAQI
25th Oct 2025112 AMAQI
25th Oct 2025153 AMAQI
25th Oct 2025134 AMAQI
25th Oct 2025185 AMAQI
25th Oct 2025206 AMAQI
13°C7/23°C
25th Oct 2025187 AMAQI
25th Oct 2025158 AMAQI
25th Oct 2025149 AMAQI
25th Oct 20252010 AMAQI
25th Oct 20252011 AMAQI
25th Oct 20251712 PMAQI
25th Oct 2025171 PMAQI
25th Oct 2025182 PMAQI
25th Oct 2025183 PMAQI
25th Oct 2025174 PMAQI
25th Oct 2025245 PMAQI
25th Oct 2025326 PMAQI
25th Oct 2025337 PMAQI
25th Oct 2025308 PMAQI
25th Oct 2025339 PMAQI
25th Oct 20253010 PMAQI
25th Oct 20252111 PMAQI
26th Oct 20252212 AMAQI
26th Oct 2025251 AMAQI
26th Oct 2025282 AMAQI
26th Oct 2025253 AMAQI
26th Oct 2025234 AMAQI
26th Oct 2025245 AMAQI
26th Oct 2025226 AMAQI
15°C11/19°C
26th Oct 2025177 AMAQI
26th Oct 2025188 AMAQI
26th Oct 2025189 AMAQI
26th Oct 20252010 AMAQI
26th Oct 20252411 AMAQI
26th Oct 20252512 PMAQI
26th Oct 2025221 PMAQI
26th Oct 2025202 PMAQI
26th Oct 2025183 PMAQI
26th Oct 2025224 PMAQI
26th Oct 2025205 PMAQI
26th Oct 2025156 PMAQI
26th Oct 2025227 PMAQI
26th Oct 2025308 PMAQI
26th Oct 2025309 PMAQI
26th Oct 20252510 PMAQI
26th Oct 20252311 PMAQI
27th Oct 20252812 AMAQI
27th Oct 2025241 AMAQI
27th Oct 2025172 AMAQI
27th Oct 2025173 AMAQI
27th Oct 2025174 AMAQI
27th Oct 2025175 AMAQI
27th Oct 2025206 AMAQI
14°C11/17°C
27th Oct 2025227 AMAQI
27th Oct 2025228 AMAQI
27th Oct 2025209 AMAQI
27th Oct 20252610 AMAQI
27th Oct 20253011 AMAQI
27th Oct 20251612 PMAQI
27th Oct 2025111 PMAQI
27th Oct 2025122 PMAQI
27th Oct 2025143 PMAQI
27th Oct 2025204 PMAQI
27th Oct 2025225 PMAQI
27th Oct 2025176 PMAQI
27th Oct 2025157 PMAQI
27th Oct 2025178 PMAQI
27th Oct 2025229 PMAQI
27th Oct 20252610 PMAQI
27th Oct 20252511 PMAQI
28th Oct 20252512 AMAQI
28th Oct 2025231 AMAQI
28th Oct 2025232 AMAQI
28th Oct 2025243 AMAQI
28th Oct 2025344 AMAQI
28th Oct 2025405 AMAQI
28th Oct 2025346 AMAQI
15°C8/24°C
28th Oct 2025267 AMAQI
7 AM12 PM
6 PM
12 AM
6 AM
--°C/°C
Day time
Avg. Highest Time
3 PM - 6 PM
37AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
9 AM
32AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 PM to 6 PM (Avg. 37), while the lowest AQI was between 9 AM to 9 AM (Avg. 32).
Night time
Avg. Highest Time
12 AM - 1 AM
40AQI
2 hours / Day
60 hours / Month
Avg. Lowest Time
2 AM - 8 PM
36AQI
7 hours / Day
210 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 1 AM (Avg. 40), while the lowest AQI was between 2 AM to 8 PM (Avg. 36).
2025 Days Vs Air Quality
Healdsburg, California, United States
2025
98%
295
2%
5
Total number of days with different AQI categories in last 301 days in 2025 (64 days remaining)
Good
295 DaysModerate
5 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 98%
Health Risk Level:
Very Low
In 2025, 98% of 301 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
Healdsburg, 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.
-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
38AQI
38AQI
2nd January 2025
31AQI
31AQI
3rd January 2025
41AQI
41AQI
4th January 2025
26AQI
26AQI
5th January 2025
33AQI
33AQI
6th January 2025
25AQI
25AQI
7th January 2025
21AQI
21AQI
8th January 2025
24AQI
24AQI
9th January 2025
33AQI
33AQI
10th January 2025
36AQI
36AQI
11th January 2025
30AQI
30AQI
12th January 2025
25AQI
25AQI
13th January 2025
31AQI
31AQI
14th January 2025
31AQI
31AQI
15th January 2025
46AQI
46AQI
16th January 2025
44AQI
44AQI
17th January 2025
42AQI
42AQI
18th January 2025
44AQI
44AQI
19th January 2025
48AQI
48AQI
20th January 2025
38AQI
38AQI
21st January 2025
41AQI
41AQI
22nd January 2025
47AQI
47AQI
23rd January 2025
49AQI
49AQI
24th January 2025
46AQI
46AQI
25th January 2025
39AQI
39AQI
26th January 2025
39AQI
39AQI
27th January 2025
41AQI
41AQI
28th January 2025
50AQI
50AQI
29th January 2025
46AQI
46AQI
30th January 2025
54AQI
54AQI
31st January 2025
45AQI
45AQI
1st February 2025
29AQI
29AQI
2nd February 2025
21AQI
21AQI
3rd February 2025
21AQI
21AQI
4th February 2025
22AQI
22AQI
5th February 2025
23AQI
23AQI
6th February 2025
27AQI
27AQI
7th February 2025
22AQI
22AQI
8th February 2025
25AQI
25AQI
9th February 2025
27AQI
27AQI
10th February 2025
33AQI
33AQI
11th February 2025
32AQI
32AQI
12th February 2025
36AQI
36AQI
13th February 2025
26AQI
26AQI
14th February 2025
28AQI
28AQI
15th February 2025
26AQI
26AQI
16th February 2025
26AQI
26AQI
17th February 2025
22AQI
22AQI
18th February 2025
25AQI
25AQI
19th February 2025
23AQI
23AQI
20th February 2025
22AQI
22AQI
21st February 2025
24AQI
24AQI
22nd February 2025
28AQI
28AQI
23rd February 2025
22AQI
22AQI
24th February 2025
20AQI
20AQI
25th February 2025
22AQI
22AQI
26th February 2025
26AQI
26AQI
27th February 2025
29AQI
29AQI
28th February 2025
33AQI
33AQI
1st March 2025
30AQI
30AQI
2nd March 2025
20AQI
20AQI
3rd March 2025
19AQI
19AQI
4th March 2025
21AQI
21AQI
5th March 2025
22AQI
22AQI
6th March 2025
21AQI
21AQI
7th March 2025
27AQI
27AQI
8th March 2025
33AQI
33AQI
9th March 2025
32AQI
32AQI
10th March 2025
27AQI
27AQI
11th March 2025
26AQI
26AQI
12th March 2025
20AQI
20AQI
13th March 2025
20AQI
20AQI
14th March 2025
18AQI
18AQI
15th March 2025
22AQI
22AQI
16th March 2025
19AQI
19AQI
17th March 2025
15AQI
15AQI
18th March 2025
18AQI
18AQI
19th March 2025
19AQI
19AQI
20th March 2025
17AQI
17AQI
21st March 2025
23AQI
23AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
21AQI
21AQI
24th March 2025
20AQI
20AQI
25th March 2025
25AQI
25AQI
26th March 2025
28AQI
28AQI
27th March 2025
20AQI
20AQI
28th March 2025
22AQI
22AQI
29th March 2025
20AQI
20AQI
30th March 2025
23AQI
23AQI
31st March 2025
20AQI
20AQI
1st April 2025
22AQI
22AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
20AQI
20AQI
4th April 2025
22AQI
22AQI
5th April 2025
26AQI
26AQI
6th April 2025
19AQI
19AQI
7th April 2025
14AQI
14AQI
8th April 2025
17AQI
17AQI
9th April 2025
17AQI
17AQI
10th April 2025
18AQI
18AQI
11th April 2025
20AQI
20AQI
12th April 2025
22AQI
22AQI
13th April 2025
24AQI
24AQI
14th April 2025
24AQI
24AQI
15th April 2025
26AQI
26AQI
16th April 2025
24AQI
24AQI
17th April 2025
20AQI
20AQI
18th April 2025
23AQI
23AQI
19th April 2025
26AQI
26AQI
20th April 2025
19AQI
19AQI
21st April 2025
20AQI
20AQI
22nd April 2025
31AQI
31AQI
23rd April 2025
36AQI
36AQI
24th April 2025
31AQI
31AQI
25th April 2025
19AQI
19AQI
26th April 2025
19AQI
19AQI
27th April 2025
17AQI
17AQI
28th April 2025
20AQI
20AQI
29th April 2025
27AQI
27AQI
30th April 2025
28AQI
28AQI
1st May 2025
33AQI
33AQI
2nd May 2025
25AQI
25AQI
3rd May 2025
17AQI
17AQI
4th May 2025
20AQI
20AQI
5th May 2025
24AQI
24AQI
6th May 2025
29AQI
29AQI
7th May 2025
36AQI
36AQI
8th May 2025
22AQI
22AQI
9th May 2025
24AQI
24AQI
10th May 2025
20AQI
20AQI
11th May 2025
18AQI
18AQI
12th May 2025
16AQI
16AQI
13th May 2025
16AQI
16AQI
14th May 2025
20AQI
20AQI
15th May 2025
24AQI
24AQI
16th May 2025
26AQI
26AQI
17th May 2025
23AQI
23AQI
18th May 2025
20AQI
20AQI
19th May 2025
18AQI
18AQI
20th May 2025
16AQI
16AQI
21st May 2025
27AQI
27AQI
22nd May 2025
21AQI
21AQI
23rd May 2025
17AQI
17AQI
24th May 2025
27AQI
27AQI
25th May 2025
20AQI
20AQI
26th May 2025
15AQI
15AQI
27th May 2025
21AQI
21AQI
28th May 2025
23AQI
23AQI
29th May 2025
18AQI
18AQI
30th May 2025
22AQI
22AQI
31st May 2025
34AQI
34AQI
1st June 2025
43AQI
43AQI
2nd June 2025
46AQI
46AQI
3rd June 2025
35AQI
35AQI
4th June 2025
30AQI
30AQI
5th June 2025
24AQI
24AQI
6th June 2025
19AQI
19AQI
7th June 2025
18AQI
18AQI
8th June 2025
20AQI
20AQI
9th June 2025
25AQI
25AQI
10th June 2025
27AQI
27AQI
11th June 2025
27AQI
27AQI
12th June 2025
36AQI
36AQI
13th June 2025
37AQI
37AQI
14th June 2025
35AQI
35AQI
15th June 2025
36AQI
36AQI
16th June 2025
28AQI
28AQI
17th June 2025
26AQI
26AQI
18th June 2025
24AQI
24AQI
19th June 2025
30AQI
30AQI
20th June 2025
30AQI
30AQI
21st June 2025
23AQI
23AQI
22nd June 2025
20AQI
20AQI
23rd June 2025
24AQI
24AQI
24th June 2025
23AQI
23AQI
25th June 2025
20AQI
20AQI
26th June 2025
20AQI
20AQI
27th June 2025
23AQI
23AQI
28th June 2025
25AQI
25AQI
29th June 2025
24AQI
24AQI
30th June 2025
21AQI
21AQI
1st July 2025
21AQI
21AQI
2nd July 2025
20AQI
20AQI
3rd July 2025
24AQI
24AQI
4th July 2025
25AQI
25AQI
5th July 2025
29AQI
29AQI
6th July 2025
27AQI
27AQI
7th July 2025
20AQI
20AQI
8th July 2025
21AQI
21AQI
9th July 2025
18AQI
18AQI
10th July 2025
22AQI
22AQI
11th July 2025
33AQI
33AQI
12th July 2025
34AQI
34AQI
13th July 2025
25AQI
25AQI
14th July 2025
19AQI
19AQI
15th July 2025
20AQI
20AQI
16th July 2025
23AQI
23AQI
17th July 2025
20AQI
20AQI
18th July 2025
17AQI
17AQI
19th July 2025
19AQI
19AQI
20th July 2025
18AQI
18AQI
21st July 2025
22AQI
22AQI
22nd July 2025
16AQI
16AQI
23rd July 2025
15AQI
15AQI
24th July 2025
15AQI
15AQI
25th July 2025
15AQI
15AQI
26th July 2025
15AQI
15AQI
27th July 2025
16AQI
16AQI
28th July 2025
18AQI
18AQI
29th July 2025
20AQI
20AQI
30th July 2025
23AQI
23AQI
31st July 2025
22AQI
22AQI
1st August 2025
22AQI
22AQI
2nd August 2025
20AQI
20AQI
3rd August 2025
28AQI
28AQI
4th August 2025
30AQI
30AQI
5th August 2025
27AQI
27AQI
6th August 2025
32AQI
32AQI
7th August 2025
24AQI
24AQI
8th August 2025
27AQI
27AQI
9th August 2025
28AQI
28AQI
10th August 2025
27AQI
27AQI
11th August 2025
29AQI
29AQI
12th August 2025
27AQI
27AQI
13th August 2025
26AQI
26AQI
14th August 2025
20AQI
20AQI
15th August 2025
30AQI
30AQI
16th August 2025
18AQI
18AQI
17th August 2025
16AQI
16AQI
18th August 2025
18AQI
18AQI
19th August 2025
22AQI
22AQI
20th August 2025
26AQI
26AQI
21st August 2025
35AQI
35AQI
22nd August 2025
40AQI
40AQI
23rd August 2025
33AQI
33AQI
24th August 2025
26AQI
26AQI
25th August 2025
27AQI
27AQI
26th August 2025
30AQI
30AQI
27th August 2025
31AQI
31AQI
28th August 2025
27AQI
27AQI
29th August 2025
25AQI
25AQI
30th August 2025
26AQI
26AQI
31st August 2025
28AQI
28AQI
1st September 2025
23AQI
23AQI
2nd September 2025
32AQI
32AQI
3rd September 2025
27AQI
27AQI
4th September 2025
24AQI
24AQI
5th September 2025
22AQI
22AQI
6th September 2025
23AQI
23AQI
7th September 2025
24AQI
24AQI
8th September 2025
21AQI
21AQI
9th September 2025
17AQI
17AQI
10th September 2025
17AQI
17AQI
11th September 2025
24AQI
24AQI
12th September 2025
24AQI
24AQI
13th September 2025
29AQI
29AQI
14th September 2025
20AQI
20AQI
15th September 2025
23AQI
23AQI
16th September 2025
29AQI
29AQI
17th September 2025
29AQI
29AQI
18th September 2025
30AQI
30AQI
19th September 2025
31AQI
31AQI
20th September 2025
39AQI
39AQI
21st September 2025
29AQI
29AQI
22nd September 2025
24AQI
24AQI
23rd September 2025
28AQI
28AQI
24th September 2025
43AQI
43AQI
25th September 2025
23AQI
23AQI
26th September 2025
37AQI
37AQI
27th September 2025
52AQI
52AQI
28th September 2025
68AQI
68AQI
29th September 2025
38AQI
38AQI
30th September 2025
16AQI
16AQI
1st October 2025
19AQI
19AQI
2nd October 2025
28AQI
28AQI
3rd October 2025
37AQI
37AQI
4th October 2025
44AQI
44AQI
5th October 2025
42AQI
42AQI
6th October 2025
44AQI
44AQI
7th October 2025
45AQI
45AQI
8th October 2025
49AQI
49AQI
9th October 2025
42AQI
42AQI
10th October 2025
31AQI
31AQI
11th October 2025
30AQI
30AQI
12th October 2025
39AQI
39AQI
13th October 2025
47AQI
47AQI
14th October 2025
35AQI
35AQI
15th October 2025
33AQI
33AQI
16th October 2025
43AQI
43AQI
17th October 2025
48AQI
48AQI
18th October 2025
54AQI
54AQI
19th October 2025
53AQI
53AQI
20th October 2025
28AQI
28AQI
21st October 2025
41AQI
41AQI
22nd October 2025
36AQI
36AQI
23rd October 2025
31AQI
31AQI
24th October 2025
29AQI
29AQI
25th October 2025
20AQI
20AQI
26th October 2025
23AQI
23AQI
27th October 2025
20AQI
20AQI
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025
38AQI
26AQI
22AQI
22AQI
22AQI
27AQI
21AQI
27AQI
29AQI
37AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202527AQI
30
1
28
31
30
31
30
31
31
28
2
25
2
295
5
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
July21AQI
202431AQI
11
5
1
12
29
31
31
28
28
3
26
4
23
8
220
20
Highest AQI recorded in
January48AQI
Lowest AQI recorded in
May21AQI
202337AQI
2
1
27
4
29
5
Highest AQI recorded in
November49AQI
Lowest AQI recorded in
December36AQI
202265AQI
1
13
1
1
2
1
1
10
1
23
2
1
3
1
1
Highest AQI recorded in
April151AQI
Lowest AQI recorded in
October34AQI
202130AQI
4
4
1
31
6
41
4
1
Highest AQI recorded in
September49AQI
Lowest AQI recorded in
November20AQI
202085AQI
2
1
9
14
2
5
2
1
10
16
3
7
Highest AQI recorded in
October156AQI
Lowest AQI recorded in
November46AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
85AQILeast Polluted Year Recorded
2025(Avg.)
27AQIHealdsburg's annual 2025 AQI (27) shows an average percentage change of -35.02% (improved AQI) compared to previous years: 2020 (85), 2021 (30), 2022 (65), 2023 (37), 2024 (31).
