Santa Cruz, 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
Santa Cruz, California, United States
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Oct 2025
27AQILowest AQI recorded on
2nd Oct 2025
26AQISame Day Analysis (2nd October ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 26 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 2nd Oct - 3rd Oct 2025
Santa Cruz, California, United States
AQI
Day
Night
.
6 AM2nd Oct 2025
7 PM
5 AM3rd Oct 2025
Day time
Avg. Highest Time
6PM2nd Oct
44AQI
Avg. Lowest Time
11AM2nd Oct
36AQI
Night time
Avg. Highest Time
11PM2nd Oct
53AQI
Avg. Lowest Time
6AM2nd Oct
39AQI
In the last 24 hours,
Santa Cruz's AQI reached its highest point of 53 at 11 PM during the Night, while the lowest point, 36, was recorded at 11 AM during the Day between 2nd Oct and 3rd Oct 2025.
Day & Night AQI Trend : Sep - Oct 2025
Santa Cruz, California, United States
SepOct
03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd
Day
Night
3rd Sep 2025316 AMAQI
3rd Sep 2025287 AMAQI
3rd Sep 2025268 AMAQI
3rd Sep 2025289 AMAQI
3rd Sep 20253410 AMAQI
3rd Sep 20252911 AMAQI
3rd Sep 20253212 PMAQI
3rd Sep 2025291 PMAQI
3rd Sep 2025312 PMAQI
3rd Sep 2025303 PMAQI
3rd Sep 2025294 PMAQI
3rd Sep 2025285 PMAQI
3rd Sep 2025326 PMAQI
3rd Sep 2025277 PMAQI
3rd Sep 2025298 PMAQI
3rd Sep 2025319 PMAQI
3rd Sep 20253010 PMAQI
3rd Sep 20252811 PMAQI
4th Sep 20252912 AMAQI
4th Sep 2025281 AMAQI
4th Sep 2025262 AMAQI
4th Sep 2025223 AMAQI
4th Sep 2025214 AMAQI
4th Sep 2025235 AMAQI
17°C14/22°C
4th Sep 2025226 AMAQI
4th Sep 2025227 AMAQI
4th Sep 2025218 AMAQI
4th Sep 2025249 AMAQI
4th Sep 20253110 AMAQI
4th Sep 20253011 AMAQI
4th Sep 20252912 PMAQI
4th Sep 2025271 PMAQI
4th Sep 2025252 PMAQI
4th Sep 2025223 PMAQI
4th Sep 2025234 PMAQI
4th Sep 2025235 PMAQI
4th Sep 2025266 PMAQI
4th Sep 2025307 PMAQI
4th Sep 2025288 PMAQI
4th Sep 2025289 PMAQI
4th Sep 20252910 PMAQI
4th Sep 20252711 PMAQI
5th Sep 20253412 AMAQI
5th Sep 2025261 AMAQI
5th Sep 2025272 AMAQI
5th Sep 2025263 AMAQI
5th Sep 2025254 AMAQI
5th Sep 2025235 AMAQI
18°C14/23°C
5th Sep 2025246 AMAQI
5th Sep 2025257 AMAQI
5th Sep 2025268 AMAQI
5th Sep 2025289 AMAQI
5th Sep 20252510 AMAQI
5th Sep 20252711 AMAQI
5th Sep 20252912 PMAQI
5th Sep 2025261 PMAQI
5th Sep 2025272 PMAQI
5th Sep 2025273 PMAQI
5th Sep 2025294 PMAQI
5th Sep 2025315 PMAQI
5th Sep 2025336 PMAQI
5th Sep 2025447 PMAQI
5th Sep 2025318 PMAQI
5th Sep 2025299 PMAQI
5th Sep 20253210 PMAQI
5th Sep 20253211 PMAQI
6th Sep 20252612 AMAQI
6th Sep 2025271 AMAQI
6th Sep 2025262 AMAQI
6th Sep 2025273 AMAQI
6th Sep 2025284 AMAQI
6th Sep 2025345 AMAQI
19°C15/25°C
6th Sep 2025276 AMAQI
6th Sep 2025327 AMAQI
6th Sep 2025328 AMAQI
6th Sep 2025349 AMAQI
6th Sep 20253410 AMAQI
6th Sep 20253511 AMAQI
6th Sep 20253512 PMAQI
6th Sep 2025341 PMAQI
6th Sep 2025352 PMAQI
6th Sep 2025363 PMAQI
6th Sep 2025364 PMAQI
6th Sep 2025375 PMAQI
6th Sep 2025336 PMAQI
6th Sep 2025377 PMAQI
6th Sep 2025358 PMAQI
6th Sep 2025359 PMAQI
6th Sep 20253510 PMAQI
6th Sep 20253311 PMAQI
7th Sep 20253312 AMAQI
7th Sep 2025331 AMAQI
7th Sep 2025332 AMAQI
7th Sep 2025363 AMAQI
7th Sep 2025384 AMAQI
7th Sep 2025405 AMAQI
18°C15/21°C
7th Sep 2025356 AMAQI
7th Sep 2025357 AMAQI
7th Sep 2025388 AMAQI
7th Sep 2025379 AMAQI
7th Sep 20253110 AMAQI
7th Sep 20252911 AMAQI
7th Sep 20253312 PMAQI
7th Sep 2025371 PMAQI
7th Sep 2025362 PMAQI
7th Sep 2025343 PMAQI
7th Sep 2025414 PMAQI
7th Sep 2025415 PMAQI
7th Sep 2025446 PMAQI
7th Sep 2025467 PMAQI
7th Sep 2025438 PMAQI
7th Sep 2025399 PMAQI
7th Sep 20253510 PMAQI
7th Sep 20253511 PMAQI
8th Sep 20253612 AMAQI
8th Sep 2025361 AMAQI
8th Sep 2025382 AMAQI
8th Sep 2025423 AMAQI
8th Sep 2025424 AMAQI
8th Sep 2025455 AMAQI
19°C15/24°C
8th Sep 2025436 AMAQI
8th Sep 2025377 AMAQI
8th Sep 2025528 AMAQI
8th Sep 2025569 AMAQI
8th Sep 20255510 AMAQI
8th Sep 20254711 AMAQI
8th Sep 20255812 PMAQI
8th Sep 2025531 PMAQI
8th Sep 2025532 PMAQI
8th Sep 2025523 PMAQI
8th Sep 2025504 PMAQI
8th Sep 2025465 PMAQI
8th Sep 2025496 PMAQI
8th Sep 2025487 PMAQI
8th Sep 2025508 PMAQI
8th Sep 2025429 PMAQI
8th Sep 20254610 PMAQI
8th Sep 20254411 PMAQI
9th Sep 20254512 AMAQI
9th Sep 2025431 AMAQI
9th Sep 2025422 AMAQI
9th Sep 2025283 AMAQI
9th Sep 2025264 AMAQI
9th Sep 2025345 AMAQI
17°C15/21°C
9th Sep 2025276 AMAQI
9th Sep 2025267 AMAQI
9th Sep 2025308 AMAQI
9th Sep 2025289 AMAQI
9th Sep 20253310 AMAQI
9th Sep 20253711 AMAQI
9th Sep 20253612 PMAQI
9th Sep 2025381 PMAQI
9th Sep 2025332 PMAQI
9th Sep 2025333 PMAQI
9th Sep 2025334 PMAQI
9th Sep 2025395 PMAQI
9th Sep 2025356 PMAQI
9th Sep 2025357 PMAQI
9th Sep 2025328 PMAQI
9th Sep 2025359 PMAQI
9th Sep 20253410 PMAQI
9th Sep 20253311 PMAQI
10th Sep 20253112 AMAQI
10th Sep 2025341 AMAQI
10th Sep 2025322 AMAQI
10th Sep 2025283 AMAQI
10th Sep 2025244 AMAQI
10th Sep 2025285 AMAQI
18°C16/21°C
10th Sep 2025236 AMAQI
10th Sep 2025217 AMAQI
10th Sep 2025248 AMAQI
10th Sep 2025239 AMAQI
10th Sep 20252610 AMAQI
10th Sep 20252911 AMAQI
10th Sep 20252612 PMAQI
10th Sep 2025271 PMAQI
10th Sep 2025302 PMAQI
10th Sep 2025303 PMAQI
10th Sep 2025284 PMAQI
10th Sep 2025315 PMAQI
10th Sep 2025356 PMAQI
10th Sep 2025277 PMAQI
10th Sep 2025298 PMAQI
10th Sep 2025329 PMAQI
10th Sep 20252810 PMAQI
10th Sep 20252711 PMAQI
11th Sep 20252812 AMAQI
11th Sep 2025281 AMAQI
11th Sep 2025272 AMAQI
11th Sep 2025353 AMAQI
11th Sep 2025264 AMAQI
11th Sep 2025245 AMAQI
18°C16/21°C
11th Sep 2025256 AMAQI
11th Sep 2025267 AMAQI
11th Sep 2025258 AMAQI
11th Sep 2025269 AMAQI
11th Sep 20252510 AMAQI
11th Sep 20252711 AMAQI
11th Sep 20252812 PMAQI
11th Sep 2025291 PMAQI
11th Sep 2025362 PMAQI
11th Sep 2025283 PMAQI
11th Sep 2025264 PMAQI
11th Sep 2025275 PMAQI
11th Sep 2025276 PMAQI
11th Sep 2025277 PMAQI
11th Sep 2025278 PMAQI
11th Sep 2025279 PMAQI
11th Sep 20252810 PMAQI
11th Sep 20252711 PMAQI
12th Sep 20252812 AMAQI
12th Sep 2025281 AMAQI
12th Sep 2025272 AMAQI
12th Sep 2025223 AMAQI
12th Sep 2025224 AMAQI
12th Sep 2025225 AMAQI
18°C16/21°C
12th Sep 2025236 AMAQI
12th Sep 2025207 AMAQI
12th Sep 2025218 AMAQI
12th Sep 2025209 AMAQI
12th Sep 20252210 AMAQI
12th Sep 20252311 AMAQI
12th Sep 20252612 PMAQI
12th Sep 2025261 PMAQI
12th Sep 2025252 PMAQI
12th Sep 2025273 PMAQI
12th Sep 2025264 PMAQI
12th Sep 2025255 PMAQI
12th Sep 2025256 PMAQI
12th Sep 2025247 PMAQI
12th Sep 2025288 PMAQI
12th Sep 2025319 PMAQI
12th Sep 20252510 PMAQI
12th Sep 20252811 PMAQI
13th Sep 20252912 AMAQI
13th Sep 2025321 AMAQI
13th Sep 2025332 AMAQI
13th Sep 2025273 AMAQI
13th Sep 2025254 AMAQI
13th Sep 2025235 AMAQI
18°C15/22°C
13th Sep 2025246 AMAQI
13th Sep 2025237 AMAQI
13th Sep 2025288 AMAQI
13th Sep 2025259 AMAQI
13th Sep 20252610 AMAQI
13th Sep 20252711 AMAQI
13th Sep 20252712 PMAQI
13th Sep 2025331 PMAQI
13th Sep 2025332 PMAQI
13th Sep 2025313 PMAQI
13th Sep 2025304 PMAQI
13th Sep 2025335 PMAQI
13th Sep 2025336 PMAQI
13th Sep 2025297 PMAQI
13th Sep 2025328 PMAQI
13th Sep 2025299 PMAQI
13th Sep 20252810 PMAQI
13th Sep 20252711 PMAQI
14th Sep 20252612 AMAQI
14th Sep 2025271 AMAQI
14th Sep 2025312 AMAQI
14th Sep 2025313 AMAQI
14th Sep 2025334 AMAQI
14th Sep 2025325 AMAQI
18°C14/23°C
14th Sep 2025326 AMAQI
14th Sep 2025327 AMAQI
14th Sep 2025308 AMAQI
14th Sep 2025309 AMAQI
14th Sep 20253310 AMAQI
14th Sep 20253311 AMAQI
14th Sep 20253712 PMAQI
14th Sep 2025331 PMAQI
14th Sep 2025342 PMAQI
14th Sep 2025383 PMAQI
14th Sep 2025364 PMAQI
14th Sep 2025345 PMAQI
14th Sep 2025346 PMAQI
14th Sep 2025357 PMAQI
14th Sep 2025348 PMAQI
14th Sep 2025329 PMAQI
14th Sep 20253010 PMAQI
14th Sep 20253111 PMAQI
15th Sep 20253112 AMAQI
15th Sep 2025311 AMAQI
15th Sep 2025342 AMAQI
15th Sep 2025363 AMAQI
15th Sep 2025394 AMAQI
15th Sep 2025435 AMAQI
19°C15/25°C
15th Sep 2025426 AMAQI
15th Sep 2025377 AMAQI
15th Sep 2025398 AMAQI
15th Sep 2025409 AMAQI
15th Sep 20253710 AMAQI
15th Sep 20254511 AMAQI
15th Sep 20254312 PMAQI
15th Sep 2025431 PMAQI
15th Sep 2025422 PMAQI
15th Sep 2025423 PMAQI
15th Sep 2025374 PMAQI
15th Sep 2025395 PMAQI
15th Sep 2025386 PMAQI
15th Sep 2025367 PMAQI
15th Sep 2025368 PMAQI
15th Sep 2025399 PMAQI
15th Sep 20254110 PMAQI
15th Sep 20254011 PMAQI
16th Sep 20254112 AMAQI
16th Sep 2025391 AMAQI
16th Sep 2025382 AMAQI
16th Sep 2025413 AMAQI
16th Sep 2025424 AMAQI
16th Sep 2025395 AMAQI
19°C14/26°C
16th Sep 2025366 AMAQI
16th Sep 2025437 AMAQI
16th Sep 2025478 AMAQI
16th Sep 2025469 AMAQI
16th Sep 20254610 AMAQI
16th Sep 20255111 AMAQI
16th Sep 20255012 PMAQI
16th Sep 2025411 PMAQI
16th Sep 2025502 PMAQI
16th Sep 2025503 PMAQI
16th Sep 2025484 PMAQI
16th Sep 2025455 PMAQI
16th Sep 2025456 PMAQI
16th Sep 2025457 PMAQI
16th Sep 2025458 PMAQI
16th Sep 2025459 PMAQI
16th Sep 20254310 PMAQI
16th Sep 20254411 PMAQI
17th Sep 20254612 AMAQI
17th Sep 2025471 AMAQI
17th Sep 2025482 AMAQI
17th Sep 2025783 AMAQI
17th Sep 2025684 AMAQI
17th Sep 2025665 AMAQI
20°C16/25°C
17th Sep 2025666 AMAQI
17th Sep 2025587 AMAQI
17th Sep 2025568 AMAQI
17th Sep 2025659 AMAQI
17th Sep 20255810 AMAQI
17th Sep 20255711 AMAQI
17th Sep 20255812 PMAQI
17th Sep 2025571 PMAQI
17th Sep 2025652 PMAQI
17th Sep 2025643 PMAQI
17th Sep 2025654 PMAQI
17th Sep 2025685 PMAQI
17th Sep 2025696 PMAQI
17th Sep 2025727 PMAQI
17th Sep 2025728 PMAQI
17th Sep 2025659 PMAQI
17th Sep 20256210 PMAQI
17th Sep 20256111 PMAQI
18th Sep 20256212 AMAQI
18th Sep 2025621 AMAQI
18th Sep 2025622 AMAQI
18th Sep 2025723 AMAQI
18th Sep 2025724 AMAQI
18th Sep 2025725 AMAQI
22°C17/31°C
18th Sep 2025736 AMAQI
18th Sep 2025717 AMAQI
18th Sep 2025748 AMAQI
18th Sep 2025779 AMAQI
18th Sep 20258010 AMAQI
18th Sep 20257411 AMAQI
18th Sep 20257912 PMAQI
18th Sep 2025791 PMAQI
18th Sep 2025742 PMAQI
18th Sep 2025753 PMAQI
18th Sep 2025734 PMAQI
18th Sep 2025705 PMAQI
18th Sep 2025696 PMAQI
18th Sep 2025697 PMAQI
18th Sep 2025698 PMAQI
18th Sep 2025679 PMAQI
18th Sep 20256710 PMAQI
18th Sep 20257011 PMAQI
19th Sep 20257112 AMAQI
19th Sep 2025711 AMAQI
19th Sep 2025682 AMAQI
19th Sep 2025693 AMAQI
19th Sep 2025744 AMAQI
19th Sep 2025765 AMAQI
18°C16/22°C
19th Sep 2025746 AMAQI
19th Sep 2025727 AMAQI
19th Sep 2025778 AMAQI
19th Sep 2025819 AMAQI
19th Sep 20258410 AMAQI
19th Sep 20257911 AMAQI
19th Sep 20257912 PMAQI
19th Sep 2025711 PMAQI
19th Sep 2025732 PMAQI
19th Sep 2025743 PMAQI
19th Sep 2025734 PMAQI
19th Sep 2025735 PMAQI
19th Sep 2025746 PMAQI
19th Sep 2025767 PMAQI
19th Sep 2025768 PMAQI
19th Sep 2025749 PMAQI
19th Sep 20257610 PMAQI
19th Sep 20257511 PMAQI
20th Sep 20257312 AMAQI
20th Sep 2025731 AMAQI
20th Sep 2025712 AMAQI
20th Sep 2025713 AMAQI
20th Sep 2025634 AMAQI
20th Sep 2025615 AMAQI
18°C15/22°C
20th Sep 2025626 AMAQI
20th Sep 2025597 AMAQI
20th Sep 2025618 AMAQI
20th Sep 2025599 AMAQI
20th Sep 20255810 AMAQI
20th Sep 20256011 AMAQI
20th Sep 20256512 PMAQI
20th Sep 2025681 PMAQI
20th Sep 2025692 PMAQI
20th Sep 2025703 PMAQI
20th Sep 2025704 PMAQI
20th Sep 2025685 PMAQI
20th Sep 2025686 PMAQI
20th Sep 2025697 PMAQI
20th Sep 2025688 PMAQI
20th Sep 2025699 PMAQI
20th Sep 20256810 PMAQI
20th Sep 20256811 PMAQI
21st Sep 20256812 AMAQI
21st Sep 2025671 AMAQI
21st Sep 2025682 AMAQI
21st Sep 2025613 AMAQI
21st Sep 2025574 AMAQI
21st Sep 2025575 AMAQI
18°C14/25°C
21st Sep 2025616 AMAQI
21st Sep 2025597 AMAQI
21st Sep 2025618 AMAQI
21st Sep 2025629 AMAQI
21st Sep 20256010 AMAQI
21st Sep 20256011 AMAQI
21st Sep 20256212 PMAQI
21st Sep 2025621 PMAQI
21st Sep 2025632 PMAQI
21st Sep 2025653 PMAQI
21st Sep 2025634 PMAQI
21st Sep 2025645 PMAQI
21st Sep 2025646 PMAQI
21st Sep 2025647 PMAQI
21st Sep 2025638 PMAQI
21st Sep 2025639 PMAQI
21st Sep 20256210 PMAQI
21st Sep 20256311 PMAQI
22nd Sep 20256212 AMAQI
22nd Sep 2025621 AMAQI
22nd Sep 2025632 AMAQI
22nd Sep 2025513 AMAQI
22nd Sep 2025474 AMAQI
22nd Sep 2025455 AMAQI
20°C14/30°C
22nd Sep 2025476 AMAQI
22nd Sep 2025457 AMAQI
22nd Sep 2025428 AMAQI
22nd Sep 2025419 AMAQI
22nd Sep 20254010 AMAQI
22nd Sep 20254011 AMAQI
22nd Sep 20253712 PMAQI
22nd Sep 2025431 PMAQI
22nd Sep 2025502 PMAQI
22nd Sep 2025513 PMAQI
22nd Sep 2025514 PMAQI
22nd Sep 2025525 PMAQI
22nd Sep 2025516 PMAQI
22nd Sep 2025517 PMAQI
22nd Sep 2025538 PMAQI
22nd Sep 2025549 PMAQI
22nd Sep 20255310 PMAQI
22nd Sep 20255311 PMAQI
23rd Sep 20255212 AMAQI
23rd Sep 2025521 AMAQI
23rd Sep 2025512 AMAQI
23rd Sep 2025313 AMAQI
23rd Sep 2025294 AMAQI
23rd Sep 2025295 AMAQI
20°C14/30°C
23rd Sep 2025306 AMAQI
23rd Sep 2025287 AMAQI
23rd Sep 2025288 AMAQI
23rd Sep 2025289 AMAQI
23rd Sep 20252910 AMAQI
23rd Sep 20253111 AMAQI
23rd Sep 20253012 PMAQI
23rd Sep 2025331 PMAQI
23rd Sep 2025362 PMAQI
23rd Sep 2025353 PMAQI
23rd Sep 2025364 PMAQI
23rd Sep 2025355 PMAQI
23rd Sep 2025346 PMAQI
23rd Sep 2025347 PMAQI
23rd Sep 2025348 PMAQI
23rd Sep 2025359 PMAQI
23rd Sep 20253810 PMAQI
23rd Sep 20253711 PMAQI
24th Sep 20253712 AMAQI
24th Sep 2025361 AMAQI
24th Sep 2025352 AMAQI
24th Sep 2025273 AMAQI
24th Sep 2025204 AMAQI
24th Sep 2025205 AMAQI
22°C14/38°C
24th Sep 2025226 AMAQI
24th Sep 2025237 AMAQI
24th Sep 2025238 AMAQI
24th Sep 2025229 AMAQI
24th Sep 20252210 AMAQI
24th Sep 20252311 AMAQI
24th Sep 20252412 PMAQI
24th Sep 2025251 PMAQI
24th Sep 2025262 PMAQI
24th Sep 2025273 PMAQI
24th Sep 2025294 PMAQI
24th Sep 2025275 PMAQI
24th Sep 2025276 PMAQI
24th Sep 2025257 PMAQI
24th Sep 2025268 PMAQI
24th Sep 2025269 PMAQI
24th Sep 20252610 PMAQI
24th Sep 20252611 PMAQI
25th Sep 20252612 AMAQI
25th Sep 2025271 AMAQI
25th Sep 2025262 AMAQI
25th Sep 2025243 AMAQI
25th Sep 2025244 AMAQI
25th Sep 2025245 AMAQI
21°C16/30°C
25th Sep 2025236 AMAQI
25th Sep 2025277 AMAQI
25th Sep 2025308 AMAQI
25th Sep 2025299 AMAQI
25th Sep 20252610 AMAQI
25th Sep 20252711 AMAQI
25th Sep 20252812 PMAQI
25th Sep 2025271 PMAQI
25th Sep 2025282 PMAQI
25th Sep 2025283 PMAQI
25th Sep 2025284 PMAQI
25th Sep 2025285 PMAQI
25th Sep 2025296 PMAQI
25th Sep 2025307 PMAQI
25th Sep 2025298 PMAQI
25th Sep 2025309 PMAQI
25th Sep 20253010 PMAQI
25th Sep 20253011 PMAQI
26th Sep 20253012 AMAQI
26th Sep 2025291 AMAQI
26th Sep 2025302 AMAQI
26th Sep 2025293 AMAQI
26th Sep 2025294 AMAQI
26th Sep 2025295 AMAQI
21°C16/31°C
26th Sep 2025296 AMAQI
26th Sep 2025287 AMAQI
26th Sep 2025258 AMAQI
26th Sep 2025249 AMAQI
26th Sep 20252210 AMAQI
26th Sep 20252211 AMAQI
26th Sep 20252312 PMAQI
26th Sep 2025251 PMAQI
26th Sep 2025272 PMAQI
26th Sep 2025283 PMAQI
26th Sep 2025294 PMAQI
26th Sep 2025285 PMAQI
26th Sep 2025286 PMAQI
26th Sep 2025307 PMAQI
26th Sep 2025318 PMAQI
26th Sep 2025319 PMAQI
26th Sep 20253110 PMAQI
26th Sep 20253011 PMAQI
27th Sep 20253012 AMAQI
27th Sep 2025291 AMAQI
27th Sep 2025292 AMAQI
27th Sep 2025283 AMAQI
27th Sep 2025294 AMAQI
27th Sep 2025305 AMAQI
18°C15/27°C
27th Sep 2025266 AMAQI
27th Sep 2025167 AMAQI
27th Sep 2025168 AMAQI
27th Sep 2025159 AMAQI
27th Sep 20251610 AMAQI
27th Sep 20251711 AMAQI
27th Sep 20251612 PMAQI
27th Sep 2025171 PMAQI
27th Sep 2025172 PMAQI
27th Sep 2025163 PMAQI
27th Sep 2025174 PMAQI
27th Sep 2025165 PMAQI
27th Sep 2025166 PMAQI
27th Sep 2025167 PMAQI
27th Sep 2025168 PMAQI
27th Sep 2025179 PMAQI
27th Sep 20251810 PMAQI
27th Sep 20251811 PMAQI
28th Sep 20251812 AMAQI
28th Sep 2025181 AMAQI
28th Sep 2025172 AMAQI
28th Sep 2025173 AMAQI
28th Sep 2025174 AMAQI
28th Sep 2025175 AMAQI
17°C14/20°C
28th Sep 2025156 AMAQI
28th Sep 2025147 AMAQI
28th Sep 2025148 AMAQI
28th Sep 2025149 AMAQI
28th Sep 20251410 AMAQI
28th Sep 20251411 AMAQI
28th Sep 20251212 PMAQI
28th Sep 2025121 PMAQI
28th Sep 2025122 PMAQI
28th Sep 2025133 PMAQI
28th Sep 2025114 PMAQI
28th Sep 2025125 PMAQI
28th Sep 2025136 PMAQI
28th Sep 2025147 PMAQI
28th Sep 2025148 PMAQI
28th Sep 2025149 PMAQI
28th Sep 20251410 PMAQI
28th Sep 20251511 PMAQI
29th Sep 20251412 AMAQI
29th Sep 2025321 AMAQI
29th Sep 2025372 AMAQI
29th Sep 2025283 AMAQI
29th Sep 2025214 AMAQI
29th Sep 2025175 AMAQI
18°C17/21°C
29th Sep 2025156 AMAQI
29th Sep 2025167 AMAQI
29th Sep 2025158 AMAQI
29th Sep 2025169 AMAQI
29th Sep 20251410 AMAQI
29th Sep 20251211 AMAQI
29th Sep 20251312 PMAQI
29th Sep 2025151 PMAQI
29th Sep 2025212 PMAQI
29th Sep 2025253 PMAQI
29th Sep 2025244 PMAQI
29th Sep 2025265 PMAQI
29th Sep 2025246 PMAQI
29th Sep 2025227 PMAQI
29th Sep 2025228 PMAQI
29th Sep 2025329 PMAQI
29th Sep 20252910 PMAQI
29th Sep 20252311 PMAQI
30th Sep 20252212 AMAQI
30th Sep 2025241 AMAQI
30th Sep 2025272 AMAQI
30th Sep 2025233 AMAQI
30th Sep 2025204 AMAQI
30th Sep 2025315 AMAQI
19°C17/22°C
30th Sep 2025216 AMAQI
30th Sep 2025187 AMAQI
30th Sep 2025198 AMAQI
30th Sep 2025229 AMAQI
30th Sep 20252510 AMAQI
30th Sep 20252511 AMAQI
30th Sep 20251812 PMAQI
30th Sep 2025191 PMAQI
30th Sep 2025342 PMAQI
30th Sep 2025223 PMAQI
30th Sep 2025254 PMAQI
30th Sep 2025255 PMAQI
30th Sep 2025326 PMAQI
30th Sep 2025267 PMAQI
30th Sep 2025298 PMAQI
30th Sep 2025289 PMAQI
30th Sep 20252910 PMAQI
30th Sep 20252411 PMAQI
1st Oct 20252612 AMAQI
1st Oct 2025281 AMAQI
1st Oct 2025272 AMAQI
1st Oct 2025243 AMAQI
1st Oct 2025194 AMAQI
1st Oct 2025245 AMAQI
18°C14/21°C
1st Oct 2025256 AMAQI
1st Oct 2025257 AMAQI
1st Oct 2025248 AMAQI
1st Oct 2025259 AMAQI
1st Oct 20252510 AMAQI
1st Oct 20252611 AMAQI
1st Oct 20252912 PMAQI
1st Oct 2025411 PMAQI
1st Oct 2025462 PMAQI
1st Oct 2025433 PMAQI
1st Oct 2025374 PMAQI
1st Oct 2025375 PMAQI
1st Oct 2025366 PMAQI
1st Oct 2025407 PMAQI
1st Oct 2025408 PMAQI
1st Oct 2025369 PMAQI
1st Oct 20253710 PMAQI
1st Oct 20253811 PMAQI
2nd Oct 20253812 AMAQI
2nd Oct 2025371 AMAQI
2nd Oct 2025372 AMAQI
2nd Oct 2025323 AMAQI
2nd Oct 2025404 AMAQI
2nd Oct 2025395 AMAQI
19°C15/24°C
2nd Oct 2025396 AMAQI
2nd Oct 2025407 AMAQI
2nd Oct 2025378 AMAQI
2nd Oct 2025379 AMAQI
2nd Oct 20253910 AMAQI
2nd Oct 20253611 AMAQI
2nd Oct 20254012 PMAQI
2nd Oct 2025411 PMAQI
2nd Oct 2025412 PMAQI
2nd Oct 2025413 PMAQI
2nd Oct 2025404 PMAQI
2nd Oct 2025385 PMAQI
2nd Oct 2025446 PMAQI
2nd Oct 2025447 PMAQI
2nd Oct 2025458 PMAQI
2nd Oct 2025419 PMAQI
2nd Oct 20255210 PMAQI
2nd Oct 20255311 PMAQI
3rd Oct 20255012 AMAQI
3rd Oct 2025461 AMAQI
3rd Oct 2025462 AMAQI
3rd Oct 2025473 AMAQI
3rd Oct 2025404 AMAQI
3rd Oct 2025435 AMAQI
19°C15/26°C
3rd Oct 2025466 AMAQI
6 AM3rd Oct 2025507 AMAQI
3rd Oct 2025508 AMAQI
3rd Oct 2025449 AMAQI
3rd Oct 20254110 AMAQI
3rd Oct 20253511 AMAQI
3rd Oct 20253412 PMAQI
12 PM3rd Oct 2025351 PMAQI
7 PM
12 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
2 PM - 7 PM
39AQI
6 hours / Day
180 hours / Month
Avg. Lowest Time
6 AM - 1 PM
36AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 PM to 7 PM (Avg. 39), while the lowest AQI was between 6 AM to 1 PM (Avg. 36).
Night time
Avg. Highest Time
8 PM - 11 PM
39AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
4 AM - 5 AM
36AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 8 PM to 11 PM (Avg. 39), while the lowest AQI was between 4 AM to 5 AM (Avg. 36).
2025 Days Vs Air Quality
Santa Cruz, California, United States
2025
100%
191
Total number of days with different AQI categories in last 276 days in 2025 (89 days remaining)
Good
191 DaysModerate
0 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 100%
Health Risk Level:
Very Low
In 2025, 100% of 276 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
Santa Cruz, 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
2nd January 2025
3rd January 2025
4th January 2025
5th January 2025
6th January 2025
7th January 2025
8th January 2025
9th January 2025
10th January 2025
11th January 2025
12th January 2025
13th January 2025
14th January 2025
15th January 2025
16th January 2025
17th January 2025
18th January 2025
19th January 2025
20th January 2025
21st January 2025
22nd January 2025
23rd January 2025
24th January 2025
25th January 2025
26th January 2025
27th January 2025
28th January 2025
29th January 2025
30th January 2025
31st January 2025
1st February 2025
2nd February 2025
3rd February 2025
4th February 2025
5th February 2025
6th February 2025
7th February 2025
8th February 2025
9th February 2025
10th February 2025
11th February 2025
12th February 2025
13th February 2025
14th February 2025
15th February 2025
16th February 2025
17th February 2025
18th February 2025
19th February 2025
20th February 2025
21st February 2025
22nd February 2025
23rd February 2025
24th February 2025
25th February 2025
26th February 2025
27th February 2025
28th February 2025
1st March 2025
2nd March 2025
3rd March 2025
4th March 2025
5th March 2025
6th March 2025
7th March 2025
8th March 2025
9th March 2025
10th March 2025
11th March 2025
12th March 2025
13th March 2025
14th March 2025
15th March 2025
16th March 2025
17th March 2025
18th March 2025
19th March 2025
20th March 2025
21st March 2025
22nd March 2025
23rd March 2025
24th March 2025
25th March 2025
26th March 2025
21AQI
21AQI
27th March 2025
19AQI
19AQI
28th March 2025
23AQI
23AQI
29th March 2025
18AQI
18AQI
30th March 2025
21AQI
21AQI
31st March 2025
21AQI
21AQI
1st April 2025
18AQI
18AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
19AQI
19AQI
4th April 2025
21AQI
21AQI
5th April 2025
21AQI
21AQI
6th April 2025
20AQI
20AQI
7th April 2025
20AQI
20AQI
8th April 2025
18AQI
18AQI
9th April 2025
24AQI
24AQI
10th April 2025
28AQI
28AQI
11th April 2025
23AQI
23AQI
12th April 2025
35AQI
35AQI
13th April 2025
40AQI
40AQI
14th April 2025
29AQI
29AQI
15th April 2025
26AQI
26AQI
16th April 2025
30AQI
30AQI
17th April 2025
27AQI
27AQI
18th April 2025
25AQI
25AQI
19th April 2025
31AQI
31AQI
20th April 2025
29AQI
29AQI
21st April 2025
29AQI
29AQI
22nd April 2025
32AQI
32AQI
23rd April 2025
44AQI
44AQI
24th April 2025
30AQI
30AQI
25th April 2025
21AQI
21AQI
26th April 2025
17AQI
17AQI
27th April 2025
17AQI
17AQI
28th April 2025
28AQI
28AQI
29th April 2025
33AQI
33AQI
30th April 2025
29AQI
29AQI
1st May 2025
33AQI
33AQI
2nd May 2025
30AQI
30AQI
3rd May 2025
21AQI
21AQI
4th May 2025
36AQI
36AQI
5th May 2025
45AQI
45AQI
6th May 2025
50AQI
50AQI
7th May 2025
44AQI
44AQI
8th May 2025
29AQI
29AQI
9th May 2025
29AQI
29AQI
10th May 2025
36AQI
36AQI
11th May 2025
31AQI
31AQI
12th May 2025
19AQI
19AQI
13th May 2025
18AQI
18AQI
14th May 2025
31AQI
31AQI
15th May 2025
39AQI
39AQI
16th May 2025
41AQI
41AQI
17th May 2025
24AQI
24AQI
18th May 2025
28AQI
28AQI
19th May 2025
42AQI
42AQI
20th May 2025
26AQI
26AQI
21st May 2025
39AQI
39AQI
22nd May 2025
36AQI
36AQI
23rd May 2025
24AQI
24AQI
24th May 2025
28AQI
28AQI
25th May 2025
21AQI
21AQI
26th May 2025
17AQI
17AQI
27th May 2025
25AQI
25AQI
28th May 2025
29AQI
29AQI
29th May 2025
19AQI
19AQI
30th May 2025
26AQI
26AQI
31st May 2025
37AQI
37AQI
1st June 2025
47AQI
47AQI
2nd June 2025
46AQI
46AQI
3rd June 2025
50AQI
50AQI
4th June 2025
50AQI
50AQI
5th June 2025
34AQI
34AQI
6th June 2025
28AQI
28AQI
7th June 2025
24AQI
24AQI
8th June 2025
20AQI
20AQI
9th June 2025
18AQI
18AQI
10th June 2025
23AQI
23AQI
11th June 2025
36AQI
36AQI
12th June 2025
46AQI
46AQI
13th June 2025
45AQI
45AQI
14th June 2025
43AQI
43AQI
15th June 2025
43AQI
43AQI
16th June 2025
39AQI
39AQI
17th June 2025
36AQI
36AQI
18th June 2025
28AQI
28AQI
19th June 2025
41AQI
41AQI
20th June 2025
37AQI
37AQI
21st June 2025
33AQI
33AQI
22nd June 2025
34AQI
34AQI
23rd June 2025
35AQI
35AQI
24th June 2025
20AQI
20AQI
25th June 2025
21AQI
21AQI
26th June 2025
22AQI
22AQI
27th June 2025
30AQI
30AQI
28th June 2025
30AQI
30AQI
29th June 2025
24AQI
24AQI
30th June 2025
20AQI
20AQI
1st July 2025
22AQI
22AQI
2nd July 2025
21AQI
21AQI
3rd July 2025
28AQI
28AQI
4th July 2025
30AQI
30AQI
5th July 2025
27AQI
27AQI
6th July 2025
29AQI
29AQI
7th July 2025
22AQI
22AQI
8th July 2025
19AQI
19AQI
9th July 2025
18AQI
18AQI
10th July 2025
21AQI
21AQI
11th July 2025
25AQI
25AQI
12th July 2025
29AQI
29AQI
13th July 2025
24AQI
24AQI
14th July 2025
19AQI
19AQI
15th July 2025
17AQI
17AQI
16th July 2025
19AQI
19AQI
17th July 2025
17AQI
17AQI
18th July 2025
17AQI
17AQI
19th July 2025
19AQI
19AQI
20th July 2025
17AQI
17AQI
21st July 2025
23AQI
23AQI
22nd July 2025
14AQI
14AQI
23rd July 2025
14AQI
14AQI
24th July 2025
15AQI
15AQI
25th July 2025
16AQI
16AQI
26th July 2025
15AQI
15AQI
27th July 2025
15AQI
15AQI
28th July 2025
21AQI
21AQI
29th July 2025
23AQI
23AQI
30th July 2025
22AQI
22AQI
31st July 2025
22AQI
22AQI
1st August 2025
23AQI
23AQI
2nd August 2025
20AQI
20AQI
3rd August 2025
27AQI
27AQI
4th August 2025
35AQI
35AQI
5th August 2025
30AQI
30AQI
6th August 2025
30AQI
30AQI
7th August 2025
23AQI
23AQI
8th August 2025
26AQI
26AQI
9th August 2025
33AQI
33AQI
10th August 2025
26AQI
26AQI
11th August 2025
30AQI
30AQI
12th August 2025
30AQI
30AQI
13th August 2025
26AQI
26AQI
14th August 2025
21AQI
21AQI
15th August 2025
31AQI
31AQI
16th August 2025
20AQI
20AQI
17th August 2025
14AQI
14AQI
18th August 2025
20AQI
20AQI
19th August 2025
25AQI
25AQI
20th August 2025
29AQI
29AQI
21st August 2025
39AQI
39AQI
22nd August 2025
50AQI
50AQI
23rd August 2025
44AQI
44AQI
24th August 2025
35AQI
35AQI
25th August 2025
37AQI
37AQI
26th August 2025
38AQI
38AQI
27th August 2025
43AQI
43AQI
28th August 2025
38AQI
38AQI
29th August 2025
32AQI
32AQI
30th August 2025
37AQI
37AQI
31st August 2025
40AQI
40AQI
1st September 2025
44AQI
44AQI
2nd September 2025
42AQI
42AQI
3rd September 2025
34AQI
34AQI
4th September 2025
33AQI
33AQI
5th September 2025
35AQI
35AQI
6th September 2025
27AQI
27AQI
7th September 2025
23AQI
23AQI
8th September 2025
23AQI
23AQI
9th September 2025
18AQI
18AQI
10th September 2025
18AQI
18AQI
11th September 2025
25AQI
25AQI
12th September 2025
33AQI
33AQI
13th September 2025
32AQI
32AQI
14th September 2025
22AQI
22AQI
15th September 2025
22AQI
22AQI
16th September 2025
31AQI
31AQI
17th September 2025
33AQI
33AQI
18th September 2025
36AQI
36AQI
19th September 2025
41AQI
41AQI
20th September 2025
35AQI
35AQI
21st September 2025
33AQI
33AQI
22nd September 2025
34AQI
34AQI
23rd September 2025
43AQI
43AQI
24th September 2025
46AQI
46AQI
25th September 2025
38AQI
38AQI
26th September 2025
45AQI
45AQI
27th September 2025
43AQI
43AQI
28th September 2025
25AQI
25AQI
29th September 2025
27AQI
27AQI
30th September 2025
27AQI
27AQI
1st October 2025
27AQI
27AQI
2nd October 2025
26AQI
26AQI
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
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
21AQI
26AQI
31AQI
33AQI
21AQI
31AQI
32AQI
27AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202529AQI
6
30
31
30
31
31
30
2
191
Highest AQI recorded in
June33AQI
Lowest AQI recorded in
March21AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
29AQILeast Polluted Year Recorded
2025(Avg.)
29AQISanta Cruz's annual 2025 AQI (29) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
