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HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Redwood City, North Fair Oaks, 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+

July Air Quality Analysis

Redwood City, North Fair Oaks, California, United States

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
20th Jul 2023
56AQI
Lowest AQI recorded on
30th Jul 2024
7AQI

Same Day Analysis (16th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 29 of Good air quality, showing improvement over 2023 on the same day.

Day & Night AQI Trend: 15th Jul - 16th Jul 2026

Redwood City, North Fair Oaks, California, United States

AQI
Day
Night
.

5 AM15th Jul 2026

8 PM

4 AM16th Jul 2026

Day time
Avg. Highest Time
1PM15th Jul

32AQI

Avg. Lowest Time
5AM15th Jul

25AQI

Night time
Avg. Highest Time
3AM16th Jul

31AQI

Avg. Lowest Time
9PM15th Jul

24AQI

In the last 24 hours,

Redwood City's AQI reached its highest point of 32 at 1 PM during the Day, while the lowest point, 24, was recorded at 9 PM during the Night between 15th Jul and 16th Jul 2026.

Day & Night AQI Trend : Jun - Jul 2026

Redwood City, North Fair Oaks, California, United States

JunJul
17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th
Day
Night
17th Jun 2026255 AMAQI
17th Jun 2026266 AMAQI
17th Jun 2026287 AMAQI
17th Jun 2026308 AMAQI
17th Jun 2026319 AMAQI
17th Jun 20263110 AMAQI
17th Jun 20262911 AMAQI
17th Jun 20263112 PMAQI
17th Jun 2026301 PMAQI
17th Jun 2026302 PMAQI
17th Jun 2026283 PMAQI
17th Jun 2026304 PMAQI
17th Jun 2026305 PMAQI
17th Jun 2026306 PMAQI
17th Jun 2026307 PMAQI
17th Jun 2026308 PMAQI
17th Jun 2026309 PMAQI
17th Jun 20262610 PMAQI
17th Jun 20262511 PMAQI
18th Jun 20262612 AMAQI
18th Jun 2026251 AMAQI
18th Jun 2026242 AMAQI
18th Jun 2026233 AMAQI
18th Jun 2026244 AMAQI

19°C14/30°C

18th Jun 2026255 AMAQI
18th Jun 2026256 AMAQI
18th Jun 2026287 AMAQI
18th Jun 2026278 AMAQI
18th Jun 2026319 AMAQI
18th Jun 20262710 AMAQI
18th Jun 20262411 AMAQI
18th Jun 20262812 PMAQI
18th Jun 2026241 PMAQI
18th Jun 2026282 PMAQI
18th Jun 2026263 PMAQI
18th Jun 2026284 PMAQI
18th Jun 2026265 PMAQI
18th Jun 2026266 PMAQI
18th Jun 2026287 PMAQI
18th Jun 2026298 PMAQI
18th Jun 2026289 PMAQI
18th Jun 20262910 PMAQI
18th Jun 20262811 PMAQI
19th Jun 20262612 AMAQI
19th Jun 2026251 AMAQI
19th Jun 2026222 AMAQI
19th Jun 2026243 AMAQI
19th Jun 2026194 AMAQI

19°C13/28°C

19th Jun 2026205 AMAQI
19th Jun 2026206 AMAQI
19th Jun 2026247 AMAQI
19th Jun 2026268 AMAQI
19th Jun 2026269 AMAQI
19th Jun 20262410 AMAQI
19th Jun 20262611 AMAQI
19th Jun 20262612 PMAQI
19th Jun 2026281 PMAQI
19th Jun 2026262 PMAQI
19th Jun 2026263 PMAQI
19th Jun 2026274 PMAQI
19th Jun 2026265 PMAQI
19th Jun 2026246 PMAQI
19th Jun 2026257 PMAQI
19th Jun 2026258 PMAQI
19th Jun 2026249 PMAQI
19th Jun 20262610 PMAQI
19th Jun 20262511 PMAQI
20th Jun 20262412 AMAQI
20th Jun 2026231 AMAQI
20th Jun 2026262 AMAQI
20th Jun 2026223 AMAQI
20th Jun 2026204 AMAQI

18°C13/24°C

20th Jun 2026145 AMAQI
20th Jun 2026186 AMAQI
20th Jun 2026267 AMAQI
20th Jun 2026298 AMAQI
20th Jun 2026279 AMAQI
20th Jun 20263010 AMAQI
20th Jun 20262711 AMAQI
20th Jun 20262812 PMAQI
20th Jun 2026241 PMAQI
20th Jun 2026242 PMAQI
20th Jun 2026213 PMAQI
20th Jun 2026234 PMAQI
20th Jun 2026225 PMAQI
20th Jun 2026216 PMAQI
20th Jun 2026227 PMAQI
20th Jun 2026248 PMAQI
20th Jun 2026209 PMAQI
20th Jun 20262010 PMAQI
20th Jun 20262411 PMAQI
21st Jun 20262212 AMAQI
21st Jun 2026221 AMAQI
21st Jun 2026202 AMAQI
21st Jun 2026193 AMAQI
21st Jun 2026204 AMAQI

18°C13/23°C

21st Jun 2026155 AMAQI
21st Jun 2026236 AMAQI
21st Jun 2026247 AMAQI
21st Jun 2026258 AMAQI
21st Jun 2026249 AMAQI
21st Jun 20262510 AMAQI
21st Jun 20262611 AMAQI
21st Jun 20262212 PMAQI
21st Jun 2026221 PMAQI
21st Jun 2026232 PMAQI
21st Jun 2026223 PMAQI
21st Jun 2026224 PMAQI
21st Jun 2026245 PMAQI
21st Jun 2026226 PMAQI
21st Jun 2026247 PMAQI
21st Jun 2026228 PMAQI
21st Jun 2026219 PMAQI
21st Jun 20262410 PMAQI
21st Jun 20262211 PMAQI
22nd Jun 20262112 AMAQI
22nd Jun 2026221 AMAQI
22nd Jun 2026202 AMAQI
22nd Jun 2026193 AMAQI
22nd Jun 2026194 AMAQI

18°C12/28°C

22nd Jun 2026225 AMAQI
22nd Jun 2026216 AMAQI
22nd Jun 2026237 AMAQI
22nd Jun 2026268 AMAQI
22nd Jun 2026299 AMAQI
22nd Jun 20262810 AMAQI
22nd Jun 20262611 AMAQI
22nd Jun 20262712 PMAQI
22nd Jun 2026281 PMAQI
22nd Jun 2026272 PMAQI
22nd Jun 2026283 PMAQI
22nd Jun 2026294 PMAQI
22nd Jun 2026285 PMAQI
22nd Jun 2026266 PMAQI
22nd Jun 2026247 PMAQI
22nd Jun 2026268 PMAQI
22nd Jun 2026269 PMAQI
22nd Jun 20262410 PMAQI
22nd Jun 20262411 PMAQI
23rd Jun 20262212 AMAQI
23rd Jun 2026221 AMAQI
23rd Jun 2026212 AMAQI
23rd Jun 2026203 AMAQI
23rd Jun 2026244 AMAQI

19°C13/28°C

23rd Jun 2026225 AMAQI
23rd Jun 2026256 AMAQI
23rd Jun 2026287 AMAQI
23rd Jun 2026258 AMAQI
23rd Jun 2026279 AMAQI
23rd Jun 20262810 AMAQI
23rd Jun 20262611 AMAQI
23rd Jun 20262612 PMAQI
23rd Jun 2026241 PMAQI
23rd Jun 2026232 PMAQI
23rd Jun 2026263 PMAQI
23rd Jun 2026244 PMAQI
23rd Jun 2026245 PMAQI
23rd Jun 2026256 PMAQI
23rd Jun 2026287 PMAQI
23rd Jun 2026248 PMAQI
23rd Jun 2026249 PMAQI
23rd Jun 20262410 PMAQI
23rd Jun 20262311 PMAQI
24th Jun 20262412 AMAQI
24th Jun 2026211 AMAQI
24th Jun 2026202 AMAQI
24th Jun 2026203 AMAQI
24th Jun 2026204 AMAQI

18°C13/29°C

24th Jun 2026225 AMAQI
24th Jun 2026236 AMAQI
24th Jun 2026227 AMAQI
24th Jun 2026288 AMAQI
24th Jun 2026269 AMAQI
24th Jun 20262510 AMAQI
24th Jun 20262411 AMAQI
24th Jun 20262212 PMAQI
24th Jun 2026221 PMAQI
24th Jun 2026222 PMAQI
24th Jun 2026243 PMAQI
24th Jun 2026244 PMAQI
24th Jun 2026255 PMAQI
24th Jun 2026266 PMAQI
24th Jun 2026267 PMAQI
24th Jun 2026288 PMAQI
24th Jun 2026289 PMAQI
24th Jun 20262710 PMAQI
24th Jun 20262411 PMAQI
25th Jun 20262412 AMAQI
25th Jun 2026251 AMAQI
25th Jun 2026222 AMAQI
25th Jun 2026223 AMAQI
25th Jun 2026224 AMAQI

18°C13/29°C

25th Jun 2026225 AMAQI
25th Jun 2026246 AMAQI
25th Jun 2026287 AMAQI
25th Jun 2026268 AMAQI
25th Jun 2026269 AMAQI
25th Jun 20262510 AMAQI
25th Jun 20262211 AMAQI
25th Jun 20262312 PMAQI
25th Jun 2026241 PMAQI
25th Jun 2026242 PMAQI
25th Jun 2026223 PMAQI
25th Jun 2026204 PMAQI
25th Jun 2026225 PMAQI
25th Jun 2026346 PMAQI
25th Jun 2026287 PMAQI
25th Jun 2026288 PMAQI
25th Jun 2026269 PMAQI
25th Jun 20262710 PMAQI
25th Jun 20262011 PMAQI
26th Jun 20262412 AMAQI
26th Jun 2026221 AMAQI
26th Jun 2026212 AMAQI
26th Jun 2026223 AMAQI
26th Jun 2026234 AMAQI

18°C13/27°C

26th Jun 2026265 AMAQI
26th Jun 2026266 AMAQI
26th Jun 2026307 AMAQI
26th Jun 2026288 AMAQI
26th Jun 2026289 AMAQI
26th Jun 20262810 AMAQI
26th Jun 20263011 AMAQI
26th Jun 20262712 PMAQI
26th Jun 2026281 PMAQI
26th Jun 2026272 PMAQI
26th Jun 2026283 PMAQI
26th Jun 2026284 PMAQI
26th Jun 2026315 PMAQI
26th Jun 2026316 PMAQI
26th Jun 2026307 PMAQI
26th Jun 2026308 PMAQI
26th Jun 2026309 PMAQI
26th Jun 20262810 PMAQI
26th Jun 20262811 PMAQI
27th Jun 20262812 AMAQI
27th Jun 2026271 AMAQI
27th Jun 2026302 AMAQI
27th Jun 2026283 AMAQI
27th Jun 2026284 AMAQI

16°C12/21°C

27th Jun 2026295 AMAQI
27th Jun 2026306 AMAQI
27th Jun 2026307 AMAQI
27th Jun 2026328 AMAQI
27th Jun 2026319 AMAQI
27th Jun 20263410 AMAQI
27th Jun 20263211 AMAQI
27th Jun 20262812 PMAQI
27th Jun 2026301 PMAQI
27th Jun 2026312 PMAQI
27th Jun 2026263 PMAQI
27th Jun 2026284 PMAQI
27th Jun 2026305 PMAQI
27th Jun 2026286 PMAQI
27th Jun 2026287 PMAQI
27th Jun 2026278 PMAQI
27th Jun 2026269 PMAQI
27th Jun 20262710 PMAQI
27th Jun 20262711 PMAQI
28th Jun 20262612 AMAQI
28th Jun 2026271 AMAQI
28th Jun 2026272 AMAQI
28th Jun 2026263 AMAQI
28th Jun 2026294 AMAQI

17°C13/23°C

28th Jun 2026205 AMAQI
28th Jun 2026216 AMAQI
28th Jun 2026287 AMAQI
28th Jun 2026298 AMAQI
28th Jun 2026299 AMAQI
28th Jun 20262810 AMAQI
28th Jun 20262611 AMAQI
28th Jun 20262612 PMAQI
28th Jun 2026261 PMAQI
28th Jun 2026262 PMAQI
28th Jun 2026263 PMAQI
28th Jun 2026284 PMAQI
28th Jun 2026285 PMAQI
28th Jun 2026266 PMAQI
28th Jun 2026267 PMAQI
28th Jun 2026268 PMAQI
28th Jun 2026269 PMAQI
28th Jun 20262210 PMAQI
28th Jun 20262611 PMAQI
29th Jun 20262212 AMAQI
29th Jun 2026201 AMAQI
29th Jun 2026222 AMAQI
29th Jun 2026203 AMAQI
29th Jun 2026224 AMAQI

19°C10/30°C

29th Jun 2026225 AMAQI
29th Jun 2026226 AMAQI
29th Jun 2026257 AMAQI
29th Jun 2026288 AMAQI
29th Jun 2026309 AMAQI
29th Jun 20262510 AMAQI
29th Jun 20262611 AMAQI
29th Jun 20262412 PMAQI
29th Jun 2026251 PMAQI
29th Jun 2026222 PMAQI
29th Jun 2026243 PMAQI
29th Jun 2026244 PMAQI
29th Jun 2026265 PMAQI
29th Jun 2026266 PMAQI
29th Jun 2026267 PMAQI
29th Jun 2026268 PMAQI
29th Jun 2026289 PMAQI
29th Jun 20262310 PMAQI
29th Jun 20262211 PMAQI
30th Jun 20262412 AMAQI
30th Jun 2026221 AMAQI
30th Jun 2026262 AMAQI
30th Jun 2026263 AMAQI
30th Jun 2026254 AMAQI

20°C11/31°C

30th Jun 2026265 AMAQI
30th Jun 2026246 AMAQI
30th Jun 2026277 AMAQI
30th Jun 2026278 AMAQI
30th Jun 2026279 AMAQI
30th Jun 20263010 AMAQI
30th Jun 20262611 AMAQI
30th Jun 20262612 PMAQI
30th Jun 2026281 PMAQI
30th Jun 2026282 PMAQI
30th Jun 2026303 PMAQI
30th Jun 2026284 PMAQI
30th Jun 2026285 PMAQI
30th Jun 2026266 PMAQI
30th Jun 2026267 PMAQI
30th Jun 2026258 PMAQI
30th Jun 2026269 PMAQI
30th Jun 20262810 PMAQI
30th Jun 20262811 PMAQI
1st Jul 20262612 AMAQI
1st Jul 2026241 AMAQI
1st Jul 2026262 AMAQI
1st Jul 2026263 AMAQI
1st Jul 2026244 AMAQI

19°C12/31°C

1st Jul 2026275 AMAQI
1st Jul 2026286 AMAQI
1st Jul 2026307 AMAQI
1st Jul 2026298 AMAQI
1st Jul 2026289 AMAQI
1st Jul 20262810 AMAQI
1st Jul 20263011 AMAQI
1st Jul 20262812 PMAQI
1st Jul 2026261 PMAQI
1st Jul 2026262 PMAQI
1st Jul 2026263 PMAQI
1st Jul 2026244 PMAQI
1st Jul 2026255 PMAQI
1st Jul 2026286 PMAQI
1st Jul 2026217 PMAQI
1st Jul 2026208 PMAQI
1st Jul 2026209 PMAQI
1st Jul 20262210 PMAQI
1st Jul 20262411 PMAQI
2nd Jul 20262412 AMAQI
2nd Jul 2026271 AMAQI
2nd Jul 2026262 AMAQI
2nd Jul 2026263 AMAQI
2nd Jul 2026284 AMAQI

18°C11/28°C

2nd Jul 2026275 AMAQI
2nd Jul 2026266 AMAQI
2nd Jul 2026297 AMAQI
2nd Jul 2026308 AMAQI
2nd Jul 2026289 AMAQI
2nd Jul 20262410 AMAQI
2nd Jul 20262811 AMAQI
2nd Jul 20262712 PMAQI
2nd Jul 2026261 PMAQI
2nd Jul 2026252 PMAQI
2nd Jul 2026293 PMAQI
2nd Jul 2026284 PMAQI
2nd Jul 2026265 PMAQI
2nd Jul 2026266 PMAQI
2nd Jul 2026257 PMAQI
2nd Jul 2026268 PMAQI
2nd Jul 2026289 PMAQI
2nd Jul 20262910 PMAQI
2nd Jul 20263011 PMAQI
3rd Jul 20262812 AMAQI
3rd Jul 2026301 AMAQI
3rd Jul 2026282 AMAQI
3rd Jul 2026283 AMAQI
3rd Jul 2026304 AMAQI

18°C11/28°C

3rd Jul 2026265 AMAQI
3rd Jul 2026286 AMAQI
3rd Jul 2026307 AMAQI
3rd Jul 2026288 AMAQI
3rd Jul 2026329 AMAQI
3rd Jul 20262810 AMAQI
3rd Jul 20263011 AMAQI
3rd Jul 20262612 PMAQI
3rd Jul 2026301 PMAQI
3rd Jul 2026282 PMAQI
3rd Jul 2026293 PMAQI
3rd Jul 2026304 PMAQI
3rd Jul 2026285 PMAQI
3rd Jul 2026286 PMAQI
3rd Jul 2026267 PMAQI
3rd Jul 2026238 PMAQI
3rd Jul 2026249 PMAQI
3rd Jul 20262810 PMAQI
3rd Jul 20262711 PMAQI
4th Jul 20263012 AMAQI
4th Jul 2026281 AMAQI
4th Jul 2026262 AMAQI
4th Jul 2026283 AMAQI
4th Jul 2026284 AMAQI

20°C13/29°C

4th Jul 2026215 AMAQI
4th Jul 2026206 AMAQI
4th Jul 2026267 AMAQI
4th Jul 2026268 AMAQI
4th Jul 2026289 AMAQI
4th Jul 20262510 AMAQI
4th Jul 20262611 AMAQI
4th Jul 20262412 PMAQI
4th Jul 2026261 PMAQI
4th Jul 2026242 PMAQI
4th Jul 2026263 PMAQI
4th Jul 2026274 PMAQI
4th Jul 2026205 PMAQI
4th Jul 2026206 PMAQI
4th Jul 2026207 PMAQI
4th Jul 2026208 PMAQI
4th Jul 2026209 PMAQI
4th Jul 20262410 PMAQI
4th Jul 20262811 PMAQI
5th Jul 20262512 AMAQI
5th Jul 2026281 AMAQI
5th Jul 2026262 AMAQI
5th Jul 2026263 AMAQI
5th Jul 2026244 AMAQI

19°C13/29°C

5th Jul 2026205 AMAQI
5th Jul 2026226 AMAQI
5th Jul 2026287 AMAQI
5th Jul 2026288 AMAQI
5th Jul 2026289 AMAQI
5th Jul 20262810 AMAQI
5th Jul 20262811 AMAQI
5th Jul 20262412 PMAQI
5th Jul 2026261 PMAQI
5th Jul 2026262 PMAQI
5th Jul 2026263 PMAQI
5th Jul 2026284 PMAQI
5th Jul 2026225 PMAQI
5th Jul 2026226 PMAQI
5th Jul 2026207 PMAQI
5th Jul 2026218 PMAQI
5th Jul 2026209 PMAQI
5th Jul 20262410 PMAQI
5th Jul 20262611 PMAQI
6th Jul 20262612 AMAQI
6th Jul 2026211 AMAQI
6th Jul 2026202 AMAQI
6th Jul 2026223 AMAQI
6th Jul 2026284 AMAQI

18°C13/29°C

6th Jul 2026295 AMAQI
6th Jul 2026286 AMAQI
6th Jul 2026297 AMAQI
6th Jul 2026328 AMAQI
6th Jul 2026329 AMAQI
6th Jul 20263110 AMAQI
6th Jul 20263411 AMAQI
6th Jul 20263012 PMAQI
6th Jul 2026331 PMAQI
6th Jul 2026302 PMAQI
6th Jul 2026303 PMAQI
6th Jul 2026304 PMAQI
6th Jul 2026265 PMAQI
6th Jul 2026266 PMAQI
6th Jul 2026247 PMAQI
6th Jul 2026238 PMAQI
6th Jul 2026249 PMAQI
6th Jul 20262410 PMAQI
6th Jul 20263111 PMAQI
7th Jul 20262812 AMAQI
7th Jul 2026321 AMAQI
7th Jul 2026302 AMAQI
7th Jul 2026323 AMAQI
7th Jul 2026284 AMAQI

17°C13/26°C

7th Jul 2026285 AMAQI
7th Jul 2026316 AMAQI
7th Jul 2026297 AMAQI
7th Jul 2026328 AMAQI
7th Jul 2026329 AMAQI
7th Jul 20263210 AMAQI
7th Jul 20263011 AMAQI
7th Jul 20262912 PMAQI
7th Jul 2026301 PMAQI
7th Jul 2026322 PMAQI
7th Jul 2026313 PMAQI
7th Jul 2026314 PMAQI
7th Jul 2026295 PMAQI
7th Jul 2026306 PMAQI
7th Jul 2026287 PMAQI
7th Jul 2026278 PMAQI
7th Jul 2026249 PMAQI
7th Jul 20262610 PMAQI
7th Jul 20263011 PMAQI
8th Jul 20262912 AMAQI
8th Jul 2026241 AMAQI
8th Jul 2026262 AMAQI
8th Jul 2026203 AMAQI
8th Jul 2026224 AMAQI

16°C11/21°C

8th Jul 2026225 AMAQI
8th Jul 2026246 AMAQI
8th Jul 2026267 AMAQI
8th Jul 2026308 AMAQI
8th Jul 2026319 AMAQI
8th Jul 20263210 AMAQI
8th Jul 20263111 AMAQI
8th Jul 20262812 PMAQI
8th Jul 2026281 PMAQI
8th Jul 2026272 PMAQI
8th Jul 2026283 PMAQI
8th Jul 2026294 PMAQI
8th Jul 2026265 PMAQI
8th Jul 2026226 PMAQI
8th Jul 2026267 PMAQI
8th Jul 2026248 PMAQI
8th Jul 2026239 PMAQI
8th Jul 20262410 PMAQI
8th Jul 20263011 PMAQI
9th Jul 20262712 AMAQI
9th Jul 2026271 AMAQI
9th Jul 2026282 AMAQI
9th Jul 2026273 AMAQI
9th Jul 2026284 AMAQI

18°C12/26°C

9th Jul 2026265 AMAQI
9th Jul 2026286 AMAQI
9th Jul 2026317 AMAQI
9th Jul 2026298 AMAQI
9th Jul 2026309 AMAQI
9th Jul 20262910 AMAQI
9th Jul 20263011 AMAQI
9th Jul 20262812 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026322 PMAQI
9th Jul 2026303 PMAQI
9th Jul 2026314 PMAQI
9th Jul 2026305 PMAQI
9th Jul 2026306 PMAQI
9th Jul 2026287 PMAQI
9th Jul 2026288 PMAQI
9th Jul 2026279 PMAQI
9th Jul 20262410 PMAQI
9th Jul 20262411 PMAQI
10th Jul 20262612 AMAQI
10th Jul 2026321 AMAQI
10th Jul 2026302 AMAQI
10th Jul 2026323 AMAQI
10th Jul 2026324 AMAQI

19°C11/30°C

10th Jul 2026365 AMAQI
10th Jul 2026336 AMAQI
10th Jul 2026377 AMAQI
10th Jul 2026368 AMAQI
10th Jul 2026399 AMAQI
10th Jul 20263510 AMAQI
10th Jul 20263611 AMAQI
10th Jul 20263012 PMAQI
10th Jul 2026361 PMAQI
10th Jul 2026322 PMAQI
10th Jul 2026333 PMAQI
10th Jul 2026364 PMAQI
10th Jul 2026365 PMAQI
10th Jul 2026366 PMAQI
10th Jul 2026307 PMAQI
10th Jul 2026298 PMAQI
10th Jul 2026269 PMAQI
10th Jul 20262610 PMAQI
10th Jul 20262611 PMAQI
11th Jul 20262812 AMAQI
11th Jul 2026321 AMAQI
11th Jul 2026302 AMAQI
11th Jul 2026323 AMAQI
11th Jul 2026264 AMAQI

18°C12/28°C

11th Jul 2026265 AMAQI
11th Jul 2026306 AMAQI
11th Jul 2026327 AMAQI
11th Jul 2026338 AMAQI
11th Jul 2026349 AMAQI
11th Jul 20263410 AMAQI
11th Jul 20263211 AMAQI
11th Jul 20263012 PMAQI
11th Jul 2026301 PMAQI
11th Jul 2026312 PMAQI
11th Jul 2026303 PMAQI
11th Jul 2026314 PMAQI
11th Jul 2026305 PMAQI
11th Jul 2026316 PMAQI
11th Jul 2026277 PMAQI
11th Jul 2026288 PMAQI
11th Jul 2026249 PMAQI
11th Jul 20262410 PMAQI
11th Jul 20262311 PMAQI
12th Jul 20262612 AMAQI
12th Jul 2026301 AMAQI
12th Jul 2026302 AMAQI
12th Jul 2026323 AMAQI
12th Jul 2026304 AMAQI

19°C11/32°C

12th Jul 2026225 AMAQI
12th Jul 2026206 AMAQI
12th Jul 2026297 AMAQI
12th Jul 2026328 AMAQI
12th Jul 2026349 AMAQI
12th Jul 20263110 AMAQI
12th Jul 20263211 AMAQI
12th Jul 20262712 PMAQI
12th Jul 2026301 PMAQI
12th Jul 2026282 PMAQI
12th Jul 2026293 PMAQI
12th Jul 2026304 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026316 PMAQI
12th Jul 2026267 PMAQI
12th Jul 2026268 PMAQI
12th Jul 2026249 PMAQI
12th Jul 20262210 PMAQI
12th Jul 20262211 PMAQI
13th Jul 20262712 AMAQI
13th Jul 2026321 AMAQI
13th Jul 2026322 AMAQI
13th Jul 2026313 AMAQI
13th Jul 2026314 AMAQI

22°C14/35°C

13th Jul 2026325 AMAQI
13th Jul 2026326 AMAQI
13th Jul 2026347 AMAQI
13th Jul 2026348 AMAQI
13th Jul 2026329 AMAQI
13th Jul 20263610 AMAQI
13th Jul 20263211 AMAQI
13th Jul 20263012 PMAQI
13th Jul 2026321 PMAQI
13th Jul 2026322 PMAQI
13th Jul 2026323 PMAQI
13th Jul 2026264 PMAQI
13th Jul 2026325 PMAQI
13th Jul 2026336 PMAQI
13th Jul 2026287 PMAQI
13th Jul 2026238 PMAQI
13th Jul 2026209 PMAQI
13th Jul 20262410 PMAQI
13th Jul 20262211 PMAQI
14th Jul 20262412 AMAQI
14th Jul 2026301 AMAQI
14th Jul 2026322 AMAQI
14th Jul 2026333 AMAQI
14th Jul 2026324 AMAQI

23°C17/35°C

14th Jul 2026345 AMAQI
14th Jul 2026336 AMAQI
14th Jul 2026387 AMAQI
14th Jul 2026388 AMAQI
14th Jul 2026369 AMAQI
14th Jul 20263410 AMAQI
14th Jul 20263211 AMAQI
14th Jul 20263012 PMAQI
14th Jul 2026341 PMAQI
14th Jul 2026302 PMAQI
14th Jul 2026323 PMAQI
14th Jul 2026344 PMAQI
14th Jul 2026305 PMAQI
14th Jul 2026326 PMAQI
14th Jul 2026287 PMAQI
14th Jul 2026248 PMAQI
14th Jul 2026229 PMAQI
14th Jul 20262210 PMAQI
14th Jul 20262011 PMAQI
15th Jul 20262112 AMAQI
15th Jul 2026271 AMAQI
15th Jul 2026242 AMAQI
15th Jul 2026243 AMAQI
15th Jul 2026244 AMAQI

25°C16/39°C

15th Jul 2026255 AMAQI
15th Jul 2026286 AMAQI
15th Jul 2026287 AMAQI
15th Jul 2026268 AMAQI
15th Jul 2026269 AMAQI
15th Jul 20262810 AMAQI
15th Jul 20263011 AMAQI
15th Jul 20262912 PMAQI
15th Jul 2026321 PMAQI
15th Jul 2026322 PMAQI
15th Jul 2026303 PMAQI
15th Jul 2026304 PMAQI
15th Jul 2026295 PMAQI
15th Jul 2026326 PMAQI
15th Jul 2026297 PMAQI
15th Jul 2026288 PMAQI
15th Jul 2026249 PMAQI
15th Jul 20262610 PMAQI
15th Jul 20262611 PMAQI
16th Jul 20262512 AMAQI
16th Jul 2026271 AMAQI
16th Jul 2026282 AMAQI
16th Jul 2026313 AMAQI
16th Jul 2026294 AMAQI

24°C16/34°C

16th Jul 2026295 AMAQI
5 AM
16th Jul 2026326 AMAQI
16th Jul 2026287 AMAQI
16th Jul 2026308 AMAQI
16th Jul 2026309 AMAQI
16th Jul 20263210 AMAQI
16th Jul 20263011 AMAQI
16th Jul 20262812 PMAQI
12 PM
16th Jul 2026321 PMAQI
16th Jul 2026302 PMAQI
16th Jul 2026283 PMAQI
16th Jul 2026264 PMAQI
16th Jul 2026295 PMAQI
16th Jul 2026316 PMAQI
16th Jul 2026287 PMAQI
16th Jul 2026298 PMAQI
8 PM
16th Jul 2026249 PMAQI
16th Jul 20262610 PMAQI
16th Jul 20262411 PMAQI
12 AM
4 AM

20°C13/28°C

Day time
Avg. Highest Time
9 AM

30AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
5 AM

25AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 AM to 9 AM (Avg. 30), while the lowest AQI was between 5 AM to 5 AM (Avg. 25).
Night time
Avg. Highest Time
1 AM - 3 AM

26AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM

25AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 AM to 3 AM (Avg. 26), while the lowest AQI was between 12 AM to 12 AM (Avg. 25).

2026 Days Vs Air Quality

Redwood City, North Fair Oaks, California, United States

2026

94%

183

6%

11

Total number of days with different AQI categories in last 197 days in 2026 (168 days remaining)

Good
183 Days
Moderate
11 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 94%

Health Risk Level:

Very Low

In 2026, 94% of 197 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

Redwood City, North Fair Oaks, California, United States

AQI levels in 2026

AQI (US)
PM₂.₅
PM₁₀
CO
SO₂
NO₂
O₃
Sun.Mon.Tue.Wed.Thu.Fri.Sat.

Jan.

Feb.

Mar.

Apr.

May

Jun.

Jul.

Aug.

Sep.

Oct.

Nov.

Dec.

-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
21AQI (US)
2nd January 2026
11AQI (US)
3rd January 2026
12AQI (US)
4th January 2026
15AQI (US)
5th January 2026
19AQI (US)
6th January 2026
16AQI (US)
7th January 2026
15AQI (US)
8th January 2026
14AQI (US)
9th January 2026
18AQI (US)
10th January 2026
29AQI (US)
11th January 2026
32AQI (US)
12th January 2026
45AQI (US)
13th January 2026
43AQI (US)
14th January 2026
45AQI (US)
15th January 2026
43AQI (US)
16th January 2026
38AQI (US)
17th January 2026
41AQI (US)
18th January 2026
48AQI (US)
19th January 2026
37AQI (US)
20th January 2026
42AQI (US)
21st January 2026
45AQI (US)
22nd January 2026
48AQI (US)
23rd January 2026
52AQI (US)
24th January 2026
47AQI (US)
25th January 2026
45AQI (US)
26th January 2026
46AQI (US)
27th January 2026
42AQI (US)
28th January 2026
49AQI (US)
29th January 2026
55AQI (US)
30th January 2026
51AQI (US)
31st January 2026
42AQI (US)
1st February 2026
45AQI (US)
2nd February 2026
47AQI (US)
3rd February 2026
48AQI (US)
4th February 2026
47AQI (US)
5th February 2026
46AQI (US)
6th February 2026
42AQI (US)
7th February 2026
36AQI (US)
8th February 2026
46AQI (US)
9th February 2026
47AQI (US)
10th February 2026
47AQI (US)
11th February 2026
46AQI (US)
12th February 2026
47AQI (US)
13th February 2026
52AQI (US)
14th February 2026
53AQI (US)
15th February 2026
42AQI (US)
16th February 2026
46AQI (US)
17th February 2026
52AQI (US)
18th February 2026
43AQI (US)
19th February 2026
44AQI (US)
20th February 2026
42AQI (US)
21st February 2026
36AQI (US)
22nd February 2026
37AQI (US)
23rd February 2026
39AQI (US)
24th February 2026
44AQI (US)
25th February 2026
43AQI (US)
26th February 2026
36AQI (US)
27th February 2026
32AQI (US)
28th February 2026
34AQI (US)
1st March 2026
40AQI (US)
2nd March 2026
52AQI (US)
3rd March 2026
44AQI (US)
4th March 2026
44AQI (US)
5th March 2026
39AQI (US)
6th March 2026
36AQI (US)
7th March 2026
35AQI (US)
8th March 2026
35AQI (US)
9th March 2026
36AQI (US)
10th March 2026
33AQI (US)
11th March 2026
37AQI (US)
12th March 2026
37AQI (US)
13th March 2026
37AQI (US)
14th March 2026
33AQI (US)
15th March 2026
33AQI (US)
16th March 2026
35AQI (US)
17th March 2026
33AQI (US)
18th March 2026
31AQI (US)
19th March 2026
32AQI (US)
20th March 2026
36AQI (US)
21st March 2026
32AQI (US)
22nd March 2026
32AQI (US)
23rd March 2026
37AQI (US)
24th March 2026
39AQI (US)
25th March 2026
32AQI (US)
26th March 2026
33AQI (US)
27th March 2026
34AQI (US)
28th March 2026
33AQI (US)
29th March 2026
28AQI (US)
30th March 2026
27AQI (US)
31st March 2026
26AQI (US)
1st April 2026
34AQI (US)
2nd April 2026
34AQI (US)
3rd April 2026
29AQI (US)
4th April 2026
27AQI (US)
5th April 2026
26AQI (US)
6th April 2026
30AQI (US)
7th April 2026
28AQI (US)
8th April 2026
37AQI (US)
9th April 2026
30AQI (US)
10th April 2026
34AQI (US)
11th April 2026
36AQI (US)
12th April 2026
31AQI (US)
13th April 2026
34AQI (US)
14th April 2026
35AQI (US)
15th April 2026
31AQI (US)
16th April 2026
33AQI (US)
17th April 2026
18th April 2026
32AQI (US)
19th April 2026
32AQI (US)
20th April 2026
29AQI (US)
21st April 2026
30AQI (US)
22nd April 2026
23rd April 2026
28AQI (US)
24th April 2026
29AQI (US)
25th April 2026
30AQI (US)
26th April 2026
33AQI (US)
27th April 2026
28AQI (US)
28th April 2026
25AQI (US)
29th April 2026
25AQI (US)
30th April 2026
27AQI (US)
1st May 2026
28AQI (US)
2nd May 2026
24AQI (US)
3rd May 2026
21AQI (US)
4th May 2026
30AQI (US)
5th May 2026
35AQI (US)
6th May 2026
33AQI (US)
7th May 2026
29AQI (US)
8th May 2026
30AQI (US)
9th May 2026
10th May 2026
33AQI (US)
11th May 2026
35AQI (US)
12th May 2026
34AQI (US)
13th May 2026
31AQI (US)
14th May 2026
28AQI (US)
15th May 2026
42AQI (US)
16th May 2026
52AQI (US)
17th May 2026
57AQI (US)
18th May 2026
51AQI (US)
19th May 2026
53AQI (US)
20th May 2026
42AQI (US)
21st May 2026
36AQI (US)
22nd May 2026
48AQI (US)
23rd May 2026
48AQI (US)
24th May 2026
39AQI (US)
25th May 2026
41AQI (US)
26th May 2026
28AQI (US)
27th May 2026
28AQI (US)
28th May 2026
27AQI (US)
29th May 2026
26AQI (US)
30th May 2026
28AQI (US)
31st May 2026
28AQI (US)
1st June 2026
31AQI (US)
2nd June 2026
31AQI (US)
3rd June 2026
29AQI (US)
4th June 2026
25AQI (US)
5th June 2026
27AQI (US)
6th June 2026
24AQI (US)
7th June 2026
24AQI (US)
8th June 2026
26AQI (US)
9th June 2026
26AQI (US)
10th June 2026
27AQI (US)
11th June 2026
27AQI (US)
12th June 2026
27AQI (US)
13th June 2026
24AQI (US)
14th June 2026
23AQI (US)
15th June 2026
26AQI (US)
16th June 2026
27AQI (US)
17th June 2026
28AQI (US)
18th June 2026
27AQI (US)
19th June 2026
25AQI (US)
20th June 2026
23AQI (US)
21st June 2026
22AQI (US)
22nd June 2026
25AQI (US)
23rd June 2026
24AQI (US)
24th June 2026
24AQI (US)
25th June 2026
24AQI (US)
26th June 2026
27AQI (US)
27th June 2026
29AQI (US)
28th June 2026
26AQI (US)
29th June 2026
24AQI (US)
30th June 2026
27AQI (US)
1st July 2026
26AQI (US)
2nd July 2026
27AQI (US)
3rd July 2026
28AQI (US)
4th July 2026
25AQI (US)
5th July 2026
25AQI (US)
6th July 2026
28AQI (US)
7th July 2026
30AQI (US)
8th July 2026
26AQI (US)
9th July 2026
28AQI (US)
10th July 2026
32AQI (US)
11th July 2026
30AQI (US)
12th July 2026
28AQI (US)
13th July 2026
30AQI (US)
14th July 2026
31AQI (US)
15th July 2026
27AQI (US)
16th July 2026
29AQI (US)
17th July 2026
18th July 2026
19th July 2026
20th July 2026
21st July 2026
22nd July 2026
23rd July 2026
24th July 2026
25th July 2026
26th July 2026
27th July 2026
28th July 2026
29th July 2026
30th July 2026
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

36AQI (US)

44AQI (US)

35AQI (US)

31AQI (US)

36AQI (US)

26AQI (US)

28AQI (US)

No. of days

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

202634AQI (US)

28
3
25
3
30
1
28
26
4
30
16
183
11

Highest AQI (US) recorded in

February

44AQI (US)

Lowest AQI (US) recorded in

June

26AQI (US)

202532AQI (US)

28
3
28
30
1
30
31
29
1
31
31
30
27
4
24
6
18
13
337
28

Highest AQI (US) recorded in

December

44AQI (US)

Lowest AQI (US) recorded in

July

22AQI (US)

202431AQI (US)

24
1
19
1
31
30
30
1
28
1
31
30
1
30
28
3
28
2
22
9
331
19

Highest AQI (US) recorded in

December

44AQI (US)

Lowest AQI (US) recorded in

September

25AQI (US)

202339AQI (US)

30
28
30
1
23
1
1
5
30
1
28
2
25
6
25
6
25
4
1
28
3
23
6
22
7
317
37
2
5

Highest AQI (US) recorded in

April

70AQI (US)

Lowest AQI (US) recorded in

January

28AQI (US)

202233AQI (US)

17
12
19
3
31
29
1
30
1
30
20
1
25
4
30
1
30
21
10
283
32

Highest AQI (US) recorded in

January

47AQI (US)

Lowest AQI (US) recorded in

July

21AQI (US)

202131AQI (US)

27
2
28
30
29
1
29
2
28
2
31
24
7
26
4
31
27
3
24
7
334
28

Highest AQI (US) recorded in

August

38AQI (US)

Lowest AQI (US) recorded in

October

25AQI (US)

202039AQI (US)

13
20
18
30
29
2
20
9
2
12
13
5
21
5
1
1
27
2
24
7
214
38
3
6

Highest AQI (US) recorded in

September

70AQI (US)

Lowest AQI (US) recorded in

May

26AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2023(Avg.)
39AQI (US)
Least Polluted Year Recorded
2021(Avg.)
31AQI (US)

Redwood City's annual 2026 AQI (US) (34) shows an average percentage change of 0.4% (worsened AQI (US)) compared to previous years: 2020 (39), 2021 (31), 2022 (33), 2023 (39), 2024 (31), 2025 (32).