Redwood City, 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
Redwood City, California, United States
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
9th Aug 2025
39AQILowest AQI recorded on
1st Aug 2025
21AQISame Day Analysis (12th August ):
On this day, AQI across the 1 years varied significantly: 2025 ranks 1st highest AQI at 27 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Redwood City, California, United States
AQI
Day
Night
.
6 AM12th Aug 2025
8 PM
5 AM13th Aug 2025
Day time
Avg. Highest Time
3PM12th Aug
33AQI
Avg. Lowest Time
9AM12th Aug
21AQI
Night time
Avg. Highest Time
9PM12th Aug
34AQI
Avg. Lowest Time
4AM13th Aug
20AQI
In the last 24 hours,
Redwood City's AQI reached its highest point of 34 at 9 PM during the Night, while the lowest point, 20, was recorded at 4 AM during the Night between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Redwood City, California, United States
JulAug
14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th
Day
Night
14th Jul 2025156 AMAQI
14th Jul 2025167 AMAQI
14th Jul 2025168 AMAQI
14th Jul 2025169 AMAQI
14th Jul 20251810 AMAQI
14th Jul 20251811 AMAQI
14th Jul 20252212 PMAQI
14th Jul 2025241 PMAQI
14th Jul 2025282 PMAQI
14th Jul 2025283 PMAQI
14th Jul 2025284 PMAQI
14th Jul 2025265 PMAQI
14th Jul 2025206 PMAQI
14th Jul 2025197 PMAQI
14th Jul 2025188 PMAQI
14th Jul 2025189 PMAQI
14th Jul 20251810 PMAQI
14th Jul 20252011 PMAQI
15th Jul 20251912 AMAQI
15th Jul 2025191 AMAQI
15th Jul 2025172 AMAQI
15th Jul 2025183 AMAQI
15th Jul 2025154 AMAQI
15th Jul 2025165 AMAQI
19°C13/29°C
15th Jul 2025166 AMAQI
15th Jul 2025147 AMAQI
15th Jul 2025148 AMAQI
15th Jul 2025149 AMAQI
15th Jul 20251610 AMAQI
15th Jul 20251611 AMAQI
15th Jul 20251812 PMAQI
15th Jul 2025171 PMAQI
15th Jul 2025172 PMAQI
15th Jul 2025173 PMAQI
15th Jul 2025184 PMAQI
15th Jul 2025175 PMAQI
15th Jul 2025186 PMAQI
15th Jul 2025177 PMAQI
15th Jul 2025168 PMAQI
15th Jul 2025189 PMAQI
15th Jul 20251810 PMAQI
15th Jul 20251811 PMAQI
16th Jul 20251812 AMAQI
16th Jul 2025181 AMAQI
16th Jul 2025202 AMAQI
16th Jul 2025193 AMAQI
16th Jul 2025194 AMAQI
16th Jul 2025175 AMAQI
17°C13/23°C
16th Jul 2025166 AMAQI
16th Jul 2025167 AMAQI
16th Jul 2025188 AMAQI
16th Jul 2025169 AMAQI
16th Jul 20251810 AMAQI
16th Jul 20251811 AMAQI
16th Jul 20251612 PMAQI
16th Jul 2025161 PMAQI
16th Jul 2025162 PMAQI
16th Jul 2025193 PMAQI
16th Jul 2025204 PMAQI
16th Jul 2025205 PMAQI
16th Jul 2025216 PMAQI
16th Jul 2025187 PMAQI
16th Jul 2025168 PMAQI
16th Jul 2025179 PMAQI
16th Jul 20251710 PMAQI
16th Jul 20251811 PMAQI
17th Jul 20251812 AMAQI
17th Jul 2025181 AMAQI
17th Jul 2025182 AMAQI
17th Jul 2025173 AMAQI
17th Jul 2025164 AMAQI
17th Jul 2025165 AMAQI
17°C13/23°C
17th Jul 2025156 AMAQI
17th Jul 2025147 AMAQI
17th Jul 2025168 AMAQI
17th Jul 2025169 AMAQI
17th Jul 20251610 AMAQI
17th Jul 20251411 AMAQI
17th Jul 20251612 PMAQI
17th Jul 2025161 PMAQI
17th Jul 2025162 PMAQI
17th Jul 2025183 PMAQI
17th Jul 2025194 PMAQI
17th Jul 2025185 PMAQI
17th Jul 2025166 PMAQI
17th Jul 2025167 PMAQI
17th Jul 2025168 PMAQI
17th Jul 2025179 PMAQI
17th Jul 20251510 PMAQI
17th Jul 20251911 PMAQI
18th Jul 20251812 AMAQI
18th Jul 2025171 AMAQI
18th Jul 2025162 AMAQI
18th Jul 2025163 AMAQI
18th Jul 2025134 AMAQI
18th Jul 2025145 AMAQI
18°C13/25°C
18th Jul 2025156 AMAQI
18th Jul 2025147 AMAQI
18th Jul 2025158 AMAQI
18th Jul 2025209 AMAQI
18th Jul 20252510 AMAQI
18th Jul 20253011 AMAQI
18th Jul 20252512 PMAQI
18th Jul 2025221 PMAQI
18th Jul 2025262 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025194 PMAQI
18th Jul 2025185 PMAQI
18th Jul 2025186 PMAQI
18th Jul 2025167 PMAQI
18th Jul 2025168 PMAQI
18th Jul 2025189 PMAQI
18th Jul 20251710 PMAQI
18th Jul 20251811 PMAQI
19th Jul 20251812 AMAQI
19th Jul 2025171 AMAQI
19th Jul 2025172 AMAQI
19th Jul 2025183 AMAQI
19th Jul 2025174 AMAQI
19th Jul 2025185 AMAQI
18°C14/24°C
19th Jul 2025186 AMAQI
19th Jul 2025197 AMAQI
19th Jul 2025188 AMAQI
19th Jul 2025189 AMAQI
19th Jul 20251710 AMAQI
19th Jul 20251611 AMAQI
19th Jul 20251612 PMAQI
19th Jul 2025161 PMAQI
19th Jul 2025192 PMAQI
19th Jul 2025223 PMAQI
19th Jul 2025224 PMAQI
19th Jul 2025195 PMAQI
19th Jul 2025186 PMAQI
19th Jul 2025187 PMAQI
19th Jul 2025188 PMAQI
19th Jul 2025169 PMAQI
19th Jul 20251710 PMAQI
19th Jul 20251811 PMAQI
20th Jul 20251812 AMAQI
20th Jul 2025171 AMAQI
20th Jul 2025202 AMAQI
20th Jul 2025203 AMAQI
20th Jul 2025204 AMAQI
20th Jul 2025205 AMAQI
17°C14/23°C
20th Jul 2025196 AMAQI
20th Jul 2025187 AMAQI
20th Jul 2025188 AMAQI
20th Jul 2025239 AMAQI
20th Jul 20252110 AMAQI
20th Jul 20252111 AMAQI
20th Jul 20252212 PMAQI
20th Jul 2025221 PMAQI
20th Jul 2025242 PMAQI
20th Jul 2025243 PMAQI
20th Jul 2025254 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025256 PMAQI
20th Jul 2025227 PMAQI
20th Jul 2025228 PMAQI
20th Jul 2025229 PMAQI
20th Jul 20252510 PMAQI
20th Jul 20252611 PMAQI
21st Jul 20252712 AMAQI
21st Jul 2025261 AMAQI
21st Jul 2025262 AMAQI
21st Jul 2025253 AMAQI
21st Jul 2025224 AMAQI
21st Jul 2025225 AMAQI
17°C13/22°C
21st Jul 2025266 AMAQI
21st Jul 2025227 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025199 AMAQI
21st Jul 20251610 AMAQI
21st Jul 20251411 AMAQI
21st Jul 20251612 PMAQI
21st Jul 2025151 PMAQI
21st Jul 2025172 PMAQI
21st Jul 2025203 PMAQI
21st Jul 2025204 PMAQI
21st Jul 2025215 PMAQI
21st Jul 2025206 PMAQI
21st Jul 2025227 PMAQI
21st Jul 2025208 PMAQI
21st Jul 2025169 PMAQI
21st Jul 20251610 PMAQI
21st Jul 20251711 PMAQI
22nd Jul 20251812 AMAQI
22nd Jul 2025141 AMAQI
22nd Jul 2025152 AMAQI
22nd Jul 2025163 AMAQI
22nd Jul 2025134 AMAQI
22nd Jul 2025125 AMAQI
16°C14/20°C
22nd Jul 2025126 AMAQI
22nd Jul 2025137 AMAQI
22nd Jul 2025138 AMAQI
22nd Jul 2025129 AMAQI
22nd Jul 20251310 AMAQI
22nd Jul 20251311 AMAQI
22nd Jul 20251212 PMAQI
22nd Jul 2025111 PMAQI
22nd Jul 2025122 PMAQI
22nd Jul 2025123 PMAQI
22nd Jul 2025134 PMAQI
22nd Jul 2025155 PMAQI
22nd Jul 2025136 PMAQI
22nd Jul 2025127 PMAQI
22nd Jul 2025128 PMAQI
22nd Jul 2025149 PMAQI
22nd Jul 20251310 PMAQI
22nd Jul 20251111 PMAQI
23rd Jul 20251212 AMAQI
23rd Jul 2025141 AMAQI
23rd Jul 2025152 AMAQI
23rd Jul 2025163 AMAQI
23rd Jul 2025154 AMAQI
23rd Jul 2025125 AMAQI
17°C14/21°C
23rd Jul 2025126 AMAQI
23rd Jul 2025127 AMAQI
23rd Jul 2025148 AMAQI
23rd Jul 2025149 AMAQI
23rd Jul 20251310 AMAQI
23rd Jul 20251411 AMAQI
23rd Jul 20251612 PMAQI
23rd Jul 2025151 PMAQI
23rd Jul 2025152 PMAQI
23rd Jul 2025143 PMAQI
23rd Jul 2025174 PMAQI
23rd Jul 2025185 PMAQI
23rd Jul 2025166 PMAQI
23rd Jul 2025167 PMAQI
23rd Jul 2025168 PMAQI
23rd Jul 2025159 PMAQI
23rd Jul 20251510 PMAQI
23rd Jul 20251511 PMAQI
24th Jul 20251412 AMAQI
24th Jul 2025141 AMAQI
24th Jul 2025142 AMAQI
24th Jul 2025193 AMAQI
24th Jul 2025134 AMAQI
24th Jul 2025135 AMAQI
17°C14/22°C
24th Jul 2025126 AMAQI
24th Jul 2025147 AMAQI
24th Jul 2025148 AMAQI
24th Jul 2025149 AMAQI
24th Jul 20251410 AMAQI
24th Jul 20251411 AMAQI
24th Jul 20251412 PMAQI
24th Jul 2025141 PMAQI
24th Jul 2025162 PMAQI
24th Jul 2025153 PMAQI
24th Jul 2025164 PMAQI
24th Jul 2025185 PMAQI
24th Jul 2025166 PMAQI
24th Jul 2025157 PMAQI
24th Jul 2025158 PMAQI
24th Jul 2025159 PMAQI
24th Jul 20251610 PMAQI
24th Jul 20251711 PMAQI
25th Jul 20251712 AMAQI
25th Jul 2025161 AMAQI
25th Jul 2025162 AMAQI
25th Jul 2025153 AMAQI
25th Jul 2025134 AMAQI
25th Jul 2025145 AMAQI
18°C15/23°C
25th Jul 2025126 AMAQI
25th Jul 2025147 AMAQI
25th Jul 2025148 AMAQI
25th Jul 2025149 AMAQI
25th Jul 20251410 AMAQI
25th Jul 20251411 AMAQI
25th Jul 20251412 PMAQI
25th Jul 2025141 PMAQI
25th Jul 2025152 PMAQI
25th Jul 2025153 PMAQI
25th Jul 2025164 PMAQI
25th Jul 2025155 PMAQI
25th Jul 2025166 PMAQI
25th Jul 2025147 PMAQI
25th Jul 2025148 PMAQI
25th Jul 2025169 PMAQI
25th Jul 20251710 PMAQI
25th Jul 20251711 PMAQI
26th Jul 20251712 AMAQI
26th Jul 2025161 AMAQI
26th Jul 2025162 AMAQI
26th Jul 2025153 AMAQI
26th Jul 2025144 AMAQI
26th Jul 2025145 AMAQI
17°C14/21°C
26th Jul 2025136 AMAQI
26th Jul 2025157 AMAQI
26th Jul 2025138 AMAQI
26th Jul 2025139 AMAQI
26th Jul 20251410 AMAQI
26th Jul 20251411 AMAQI
26th Jul 20251412 PMAQI
26th Jul 2025131 PMAQI
26th Jul 2025142 PMAQI
26th Jul 2025153 PMAQI
26th Jul 2025144 PMAQI
26th Jul 2025145 PMAQI
26th Jul 2025156 PMAQI
26th Jul 2025167 PMAQI
26th Jul 2025158 PMAQI
26th Jul 2025149 PMAQI
26th Jul 20251410 PMAQI
26th Jul 20251511 PMAQI
27th Jul 20251412 AMAQI
27th Jul 2025141 AMAQI
27th Jul 2025152 AMAQI
27th Jul 2025143 AMAQI
27th Jul 2025144 AMAQI
27th Jul 2025135 AMAQI
17°C15/22°C
27th Jul 2025146 AMAQI
27th Jul 2025157 AMAQI
27th Jul 2025148 AMAQI
27th Jul 2025149 AMAQI
27th Jul 20251410 AMAQI
27th Jul 20251411 AMAQI
27th Jul 20251412 PMAQI
27th Jul 2025141 PMAQI
27th Jul 2025142 PMAQI
27th Jul 2025153 PMAQI
27th Jul 2025154 PMAQI
27th Jul 2025145 PMAQI
27th Jul 2025166 PMAQI
27th Jul 2025147 PMAQI
27th Jul 2025148 PMAQI
27th Jul 2025169 PMAQI
27th Jul 20251610 PMAQI
27th Jul 20251711 PMAQI
28th Jul 20251712 AMAQI
28th Jul 2025161 AMAQI
28th Jul 2025162 AMAQI
28th Jul 2025163 AMAQI
28th Jul 2025144 AMAQI
28th Jul 2025145 AMAQI
17°C14/21°C
28th Jul 2025156 AMAQI
28th Jul 2025187 AMAQI
28th Jul 2025178 AMAQI
28th Jul 2025169 AMAQI
28th Jul 20251610 AMAQI
28th Jul 20251711 AMAQI
28th Jul 20251712 PMAQI
28th Jul 2025161 PMAQI
28th Jul 2025182 PMAQI
28th Jul 2025193 PMAQI
28th Jul 2025224 PMAQI
28th Jul 2025215 PMAQI
28th Jul 2025216 PMAQI
28th Jul 2025197 PMAQI
28th Jul 2025178 PMAQI
28th Jul 2025189 PMAQI
28th Jul 20251510 PMAQI
28th Jul 20251611 PMAQI
29th Jul 20251512 AMAQI
29th Jul 2025161 AMAQI
29th Jul 2025182 AMAQI
29th Jul 2025203 AMAQI
29th Jul 2025214 AMAQI
29th Jul 2025225 AMAQI
19°C14/26°C
29th Jul 2025226 AMAQI
29th Jul 2025247 AMAQI
29th Jul 2025208 AMAQI
29th Jul 2025199 AMAQI
29th Jul 20252210 AMAQI
29th Jul 20251811 AMAQI
29th Jul 20252012 PMAQI
29th Jul 2025241 PMAQI
29th Jul 2025272 PMAQI
29th Jul 2025263 PMAQI
29th Jul 2025294 PMAQI
29th Jul 2025305 PMAQI
29th Jul 2025286 PMAQI
29th Jul 2025247 PMAQI
29th Jul 2025228 PMAQI
29th Jul 2025209 PMAQI
29th Jul 20252010 PMAQI
29th Jul 20252111 PMAQI
30th Jul 20252312 AMAQI
30th Jul 2025221 AMAQI
30th Jul 2025232 AMAQI
30th Jul 2025203 AMAQI
30th Jul 2025174 AMAQI
30th Jul 2025165 AMAQI
17°C13/23°C
30th Jul 2025196 AMAQI
30th Jul 2025207 AMAQI
30th Jul 2025188 AMAQI
30th Jul 2025179 AMAQI
30th Jul 20251810 AMAQI
30th Jul 20251711 AMAQI
30th Jul 20251812 PMAQI
30th Jul 2025221 PMAQI
30th Jul 2025242 PMAQI
30th Jul 2025243 PMAQI
30th Jul 2025244 PMAQI
30th Jul 2025245 PMAQI
30th Jul 2025246 PMAQI
30th Jul 2025247 PMAQI
30th Jul 2025248 PMAQI
30th Jul 2025209 PMAQI
30th Jul 20252210 PMAQI
30th Jul 20252211 PMAQI
31st Jul 20252112 AMAQI
31st Jul 2025211 AMAQI
31st Jul 2025202 AMAQI
31st Jul 2025203 AMAQI
31st Jul 2025154 AMAQI
31st Jul 2025145 AMAQI
16°C13/21°C
31st Jul 2025166 AMAQI
31st Jul 2025197 AMAQI
31st Jul 2025198 AMAQI
31st Jul 2025189 AMAQI
31st Jul 20251810 AMAQI
31st Jul 20251811 AMAQI
31st Jul 20252012 PMAQI
31st Jul 2025211 PMAQI
31st Jul 2025252 PMAQI
31st Jul 2025263 PMAQI
31st Jul 2025314 PMAQI
31st Jul 2025345 PMAQI
31st Jul 2025316 PMAQI
31st Jul 2025227 PMAQI
31st Jul 2025228 PMAQI
31st Jul 2025229 PMAQI
31st Jul 20252710 PMAQI
31st Jul 20252211 PMAQI
1st Aug 20252212 AMAQI
1st Aug 2025211 AMAQI
1st Aug 2025172 AMAQI
1st Aug 2025183 AMAQI
1st Aug 2025184 AMAQI
1st Aug 2025265 AMAQI
19°C15/26°C
1st Aug 2025176 AMAQI
1st Aug 2025187 AMAQI
1st Aug 2025188 AMAQI
1st Aug 2025179 AMAQI
1st Aug 20251810 AMAQI
1st Aug 20251811 AMAQI
1st Aug 20252012 PMAQI
1st Aug 2025201 PMAQI
1st Aug 2025202 PMAQI
1st Aug 2025223 PMAQI
1st Aug 2025244 PMAQI
1st Aug 2025265 PMAQI
1st Aug 2025266 PMAQI
1st Aug 2025197 PMAQI
1st Aug 2025218 PMAQI
1st Aug 2025239 PMAQI
1st Aug 20252510 PMAQI
1st Aug 20252611 PMAQI
2nd Aug 20252512 AMAQI
2nd Aug 2025241 AMAQI
2nd Aug 2025252 AMAQI
2nd Aug 2025263 AMAQI
2nd Aug 2025244 AMAQI
2nd Aug 2025235 AMAQI
17°C14/24°C
2nd Aug 2025246 AMAQI
2nd Aug 2025247 AMAQI
2nd Aug 2025218 AMAQI
2nd Aug 2025209 AMAQI
2nd Aug 20251710 AMAQI
2nd Aug 20251811 AMAQI
2nd Aug 20251812 PMAQI
2nd Aug 2025171 PMAQI
2nd Aug 2025142 PMAQI
2nd Aug 2025183 PMAQI
2nd Aug 2025184 PMAQI
2nd Aug 2025205 PMAQI
2nd Aug 2025216 PMAQI
2nd Aug 2025207 PMAQI
2nd Aug 2025198 PMAQI
2nd Aug 2025179 PMAQI
2nd Aug 20251710 PMAQI
2nd Aug 20251811 PMAQI
3rd Aug 20252012 AMAQI
3rd Aug 2025221 AMAQI
3rd Aug 2025232 AMAQI
3rd Aug 2025243 AMAQI
3rd Aug 2025204 AMAQI
3rd Aug 2025215 AMAQI
17°C14/24°C
3rd Aug 2025226 AMAQI
3rd Aug 2025227 AMAQI
3rd Aug 2025268 AMAQI
3rd Aug 2025219 AMAQI
3rd Aug 20252110 AMAQI
3rd Aug 20252411 AMAQI
3rd Aug 20253812 PMAQI
3rd Aug 2025421 PMAQI
3rd Aug 2025422 PMAQI
3rd Aug 2025483 PMAQI
3rd Aug 2025484 PMAQI
3rd Aug 2025465 PMAQI
3rd Aug 2025456 PMAQI
3rd Aug 2025287 PMAQI
3rd Aug 2025308 PMAQI
3rd Aug 2025339 PMAQI
3rd Aug 20253610 PMAQI
3rd Aug 20253411 PMAQI
4th Aug 20253612 AMAQI
4th Aug 2025351 AMAQI
4th Aug 2025332 AMAQI
4th Aug 2025343 AMAQI
4th Aug 2025364 AMAQI
4th Aug 2025405 AMAQI
17°C13/24°C
4th Aug 2025406 AMAQI
4th Aug 2025367 AMAQI
4th Aug 2025328 AMAQI
4th Aug 2025319 AMAQI
4th Aug 20254110 AMAQI
4th Aug 20254711 AMAQI
4th Aug 20254312 PMAQI
4th Aug 2025381 PMAQI
4th Aug 2025342 PMAQI
4th Aug 2025313 PMAQI
4th Aug 2025334 PMAQI
4th Aug 2025295 PMAQI
4th Aug 2025256 PMAQI
4th Aug 2025327 PMAQI
4th Aug 2025288 PMAQI
4th Aug 2025289 PMAQI
4th Aug 20252810 PMAQI
4th Aug 20252211 PMAQI
5th Aug 20252412 AMAQI
5th Aug 2025231 AMAQI
5th Aug 2025232 AMAQI
5th Aug 2025233 AMAQI
5th Aug 2025224 AMAQI
5th Aug 2025225 AMAQI
17°C13/24°C
5th Aug 2025226 AMAQI
5th Aug 2025227 AMAQI
5th Aug 2025228 AMAQI
5th Aug 2025259 AMAQI
5th Aug 20252810 AMAQI
5th Aug 20253011 AMAQI
5th Aug 20253112 PMAQI
5th Aug 2025301 PMAQI
5th Aug 2025332 PMAQI
5th Aug 2025323 PMAQI
5th Aug 2025264 PMAQI
5th Aug 2025315 PMAQI
5th Aug 2025346 PMAQI
5th Aug 2025267 PMAQI
5th Aug 2025248 PMAQI
5th Aug 2025239 PMAQI
5th Aug 20252010 PMAQI
5th Aug 20252011 PMAQI
6th Aug 20252512 AMAQI
6th Aug 2025261 AMAQI
6th Aug 2025302 AMAQI
6th Aug 2025303 AMAQI
6th Aug 2025264 AMAQI
6th Aug 2025265 AMAQI
17°C13/24°C
6th Aug 2025266 AMAQI
6th Aug 2025267 AMAQI
6th Aug 2025298 AMAQI
6th Aug 2025299 AMAQI
6th Aug 20253210 AMAQI
6th Aug 20253611 AMAQI
6th Aug 20253912 PMAQI
6th Aug 2025421 PMAQI
6th Aug 2025462 PMAQI
6th Aug 2025493 PMAQI
6th Aug 2025514 PMAQI
6th Aug 2025485 PMAQI
6th Aug 2025456 PMAQI
6th Aug 2025307 PMAQI
6th Aug 2025348 PMAQI
6th Aug 2025379 PMAQI
6th Aug 20253410 PMAQI
6th Aug 20252911 PMAQI
7th Aug 20252712 AMAQI
7th Aug 2025261 AMAQI
7th Aug 2025282 AMAQI
7th Aug 2025303 AMAQI
7th Aug 2025294 AMAQI
7th Aug 2025295 AMAQI
20°C13/30°C
7th Aug 2025306 AMAQI
7th Aug 2025307 AMAQI
7th Aug 2025288 AMAQI
7th Aug 2025259 AMAQI
7th Aug 20252310 AMAQI
7th Aug 20252211 AMAQI
7th Aug 20252012 PMAQI
7th Aug 2025201 PMAQI
7th Aug 2025192 PMAQI
7th Aug 2025223 PMAQI
7th Aug 2025234 PMAQI
7th Aug 2025265 PMAQI
7th Aug 2025276 PMAQI
7th Aug 2025267 PMAQI
7th Aug 2025248 PMAQI
7th Aug 2025219 PMAQI
7th Aug 20252010 PMAQI
7th Aug 20252011 PMAQI
8th Aug 20252212 AMAQI
8th Aug 2025191 AMAQI
8th Aug 2025222 AMAQI
8th Aug 2025253 AMAQI
8th Aug 2025284 AMAQI
8th Aug 2025295 AMAQI
18°C14/26°C
8th Aug 2025346 AMAQI
8th Aug 2025347 AMAQI
8th Aug 2025328 AMAQI
8th Aug 2025329 AMAQI
8th Aug 20253110 AMAQI
8th Aug 20253511 AMAQI
8th Aug 20253712 PMAQI
8th Aug 2025381 PMAQI
8th Aug 2025382 PMAQI
8th Aug 2025433 PMAQI
8th Aug 2025474 PMAQI
8th Aug 2025495 PMAQI
8th Aug 2025446 PMAQI
8th Aug 2025337 PMAQI
8th Aug 2025348 PMAQI
8th Aug 2025369 PMAQI
8th Aug 20253510 PMAQI
8th Aug 20254111 PMAQI
9th Aug 20254212 AMAQI
9th Aug 2025391 AMAQI
9th Aug 2025402 AMAQI
9th Aug 2025443 AMAQI
9th Aug 2025444 AMAQI
9th Aug 2025465 AMAQI
21°C14/31°C
9th Aug 2025476 AMAQI
9th Aug 2025457 AMAQI
9th Aug 2025398 AMAQI
9th Aug 2025369 AMAQI
9th Aug 20253810 AMAQI
9th Aug 20254011 AMAQI
9th Aug 20254212 PMAQI
9th Aug 2025461 PMAQI
9th Aug 2025482 PMAQI
9th Aug 2025453 PMAQI
9th Aug 2025434 PMAQI
9th Aug 2025415 PMAQI
9th Aug 2025386 PMAQI
9th Aug 2025387 PMAQI
9th Aug 2025388 PMAQI
9th Aug 2025239 PMAQI
9th Aug 20252310 PMAQI
9th Aug 20252411 PMAQI
10th Aug 20252812 AMAQI
10th Aug 2025281 AMAQI
10th Aug 2025292 AMAQI
10th Aug 2025283 AMAQI
10th Aug 2025284 AMAQI
10th Aug 2025245 AMAQI
23°C17/31°C
10th Aug 2025256 AMAQI
10th Aug 2025227 AMAQI
10th Aug 2025198 AMAQI
10th Aug 2025219 AMAQI
10th Aug 20252510 AMAQI
10th Aug 20252411 AMAQI
10th Aug 20252912 PMAQI
10th Aug 2025261 PMAQI
10th Aug 2025262 PMAQI
10th Aug 2025323 PMAQI
10th Aug 2025324 PMAQI
10th Aug 2025275 PMAQI
10th Aug 2025246 PMAQI
10th Aug 2025257 PMAQI
10th Aug 2025228 PMAQI
10th Aug 2025239 PMAQI
10th Aug 20252310 PMAQI
10th Aug 20252211 PMAQI
11th Aug 20252012 AMAQI
11th Aug 2025211 AMAQI
11th Aug 2025202 AMAQI
11th Aug 2025193 AMAQI
11th Aug 2025254 AMAQI
11th Aug 2025185 AMAQI
21°C16/31°C
11th Aug 2025186 AMAQI
11th Aug 2025187 AMAQI
11th Aug 2025228 AMAQI
11th Aug 2025219 AMAQI
11th Aug 20252410 AMAQI
11th Aug 20252511 AMAQI
11th Aug 20252712 PMAQI
11th Aug 2025261 PMAQI
11th Aug 2025282 PMAQI
11th Aug 2025373 PMAQI
11th Aug 2025384 PMAQI
11th Aug 2025345 PMAQI
11th Aug 2025366 PMAQI
11th Aug 2025247 PMAQI
11th Aug 2025318 PMAQI
11th Aug 2025339 PMAQI
11th Aug 20253410 PMAQI
11th Aug 20253111 PMAQI
12th Aug 20252912 AMAQI
12th Aug 2025271 AMAQI
12th Aug 2025242 AMAQI
12th Aug 2025233 AMAQI
12th Aug 2025284 AMAQI
12th Aug 2025265 AMAQI
18°C13/25°C
12th Aug 2025256 AMAQI
12th Aug 2025267 AMAQI
12th Aug 2025268 AMAQI
12th Aug 2025219 AMAQI
12th Aug 20252210 AMAQI
12th Aug 20252711 AMAQI
12th Aug 20252912 PMAQI
12th Aug 2025271 PMAQI
12th Aug 2025282 PMAQI
12th Aug 2025333 PMAQI
12th Aug 2025324 PMAQI
12th Aug 2025325 PMAQI
12th Aug 2025336 PMAQI
12th Aug 2025287 PMAQI
12th Aug 2025328 PMAQI
12th Aug 2025349 PMAQI
12th Aug 20253210 PMAQI
12th Aug 20252911 PMAQI
13th Aug 20252812 AMAQI
13th Aug 2025241 AMAQI
13th Aug 2025232 AMAQI
13th Aug 2025223 AMAQI
13th Aug 2025204 AMAQI
13th Aug 2025225 AMAQI
18°C14/25°C
13th Aug 2025206 AMAQI
6 AM13th Aug 2025197 AMAQI
13th Aug 2025198 AMAQI
13th Aug 2025209 AMAQI
13th Aug 20251810 AMAQI
13th Aug 20252111 AMAQI
13th Aug 20252212 PMAQI
1 PM
8 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 6 PM
23AQI
13 hours / Day
390 hours / Month
Avg. Lowest Time
6 AM - 8 PM
23AQI
15 hours / Day
450 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 6 PM (Avg. 23), while the lowest AQI was between 6 AM to 8 PM (Avg. 23).
Night time
Avg. Highest Time
12 AM - 3 AM
22AQI
4 hours / Day
120 hours / Month
Avg. Lowest Time
4 AM - 11 PM
21AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 3 AM (Avg. 22), while the lowest AQI was between 4 AM to 11 PM (Avg. 21).
2025 Days Vs Air Quality
Redwood City, California, United States
2025
98%
137
2%
3
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Good
137 DaysModerate
3 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 225 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, 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 March 2025
18AQI
18AQI
2nd March 2025
20AQI
20AQI
3rd March 2025
25AQI
25AQI
4th March 2025
21AQI
21AQI
5th March 2025
18AQI
18AQI
6th March 2025
18AQI
18AQI
1st April 2025
19AQI
19AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
21AQI
21AQI
4th April 2025
22AQI
22AQI
5th April 2025
22AQI
22AQI
6th April 2025
21AQI
21AQI
7th April 2025
17AQI
17AQI
8th April 2025
16AQI
16AQI
9th April 2025
20AQI
20AQI
10th April 2025
21AQI
21AQI
11th April 2025
18AQI
18AQI
12th April 2025
29AQI
29AQI
13th April 2025
37AQI
37AQI
14th April 2025
36AQI
36AQI
15th April 2025
26AQI
26AQI
16th April 2025
31AQI
31AQI
17th April 2025
23AQI
23AQI
18th April 2025
26AQI
26AQI
19th April 2025
35AQI
35AQI
20th April 2025
35AQI
35AQI
21st April 2025
41AQI
41AQI
22nd April 2025
37AQI
37AQI
23rd April 2025
40AQI
40AQI
24th April 2025
35AQI
35AQI
25th April 2025
19AQI
19AQI
26th April 2025
18AQI
18AQI
27th April 2025
27AQI
27AQI
28th April 2025
29AQI
29AQI
29th April 2025
35AQI
35AQI
30th April 2025
40AQI
40AQI
1st May 2025
36AQI
36AQI
2nd May 2025
37AQI
37AQI
3rd May 2025
36AQI
36AQI
4th May 2025
39AQI
39AQI
5th May 2025
34AQI
34AQI
6th May 2025
46AQI
46AQI
7th May 2025
44AQI
44AQI
8th May 2025
33AQI
33AQI
9th May 2025
37AQI
37AQI
10th May 2025
35AQI
35AQI
11th May 2025
24AQI
24AQI
12th May 2025
20AQI
20AQI
13th May 2025
20AQI
20AQI
14th May 2025
31AQI
31AQI
15th May 2025
38AQI
38AQI
16th May 2025
43AQI
43AQI
17th May 2025
25AQI
25AQI
18th May 2025
26AQI
26AQI
19th May 2025
31AQI
31AQI
20th May 2025
24AQI
24AQI
21st May 2025
41AQI
41AQI
22nd May 2025
35AQI
35AQI
23rd May 2025
26AQI
26AQI
24th May 2025
28AQI
28AQI
25th May 2025
21AQI
21AQI
26th May 2025
18AQI
18AQI
27th May 2025
29AQI
29AQI
28th May 2025
25AQI
25AQI
29th May 2025
19AQI
19AQI
30th May 2025
31AQI
31AQI
31st May 2025
51AQI
51AQI
1st June 2025
51AQI
51AQI
2nd June 2025
46AQI
46AQI
3rd June 2025
38AQI
38AQI
4th June 2025
54AQI
54AQI
5th June 2025
37AQI
37AQI
6th June 2025
28AQI
28AQI
7th June 2025
26AQI
26AQI
8th June 2025
19AQI
19AQI
9th June 2025
18AQI
18AQI
10th June 2025
21AQI
21AQI
11th June 2025
44AQI
44AQI
12th June 2025
46AQI
46AQI
13th June 2025
48AQI
48AQI
14th June 2025
43AQI
43AQI
15th June 2025
46AQI
46AQI
16th June 2025
40AQI
40AQI
17th June 2025
34AQI
34AQI
18th June 2025
31AQI
31AQI
19th June 2025
43AQI
43AQI
20th June 2025
40AQI
40AQI
21st June 2025
35AQI
35AQI
22nd June 2025
36AQI
36AQI
23rd June 2025
37AQI
37AQI
24th June 2025
24AQI
24AQI
25th June 2025
19AQI
19AQI
26th June 2025
21AQI
21AQI
27th June 2025
32AQI
32AQI
28th June 2025
38AQI
38AQI
29th June 2025
26AQI
26AQI
30th June 2025
22AQI
22AQI
1st July 2025
25AQI
25AQI
2nd July 2025
26AQI
26AQI
3rd July 2025
34AQI
34AQI
4th July 2025
29AQI
29AQI
5th July 2025
30AQI
30AQI
6th July 2025
30AQI
30AQI
7th July 2025
24AQI
24AQI
8th July 2025
20AQI
20AQI
9th July 2025
17AQI
17AQI
10th July 2025
23AQI
23AQI
11th July 2025
32AQI
32AQI
12th July 2025
33AQI
33AQI
13th July 2025
27AQI
27AQI
14th July 2025
20AQI
20AQI
15th July 2025
17AQI
17AQI
16th July 2025
18AQI
18AQI
17th July 2025
16AQI
16AQI
18th July 2025
18AQI
18AQI
19th July 2025
18AQI
18AQI
20th July 2025
22AQI
22AQI
21st July 2025
21AQI
21AQI
22nd July 2025
13AQI
13AQI
23rd July 2025
15AQI
15AQI
24th July 2025
15AQI
15AQI
25th July 2025
15AQI
15AQI
26th July 2025
15AQI
15AQI
27th July 2025
15AQI
15AQI
28th July 2025
17AQI
17AQI
29th July 2025
22AQI
22AQI
30th July 2025
21AQI
21AQI
31st July 2025
22AQI
22AQI
1st August 2025
21AQI
21AQI
2nd August 2025
21AQI
21AQI
3rd August 2025
30AQI
30AQI
4th August 2025
33AQI
33AQI
5th August 2025
25AQI
25AQI
6th August 2025
33AQI
33AQI
7th August 2025
25AQI
25AQI
8th August 2025
33AQI
33AQI
9th August 2025
39AQI
39AQI
10th August 2025
25AQI
25AQI
11th August 2025
26AQI
26AQI
12th August 2025
27AQI
27AQI
20AQI
27AQI
32AQI
35AQI
22AQI
28AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202528AQI
6
30
30
1
28
2
31
12
137
3
Highest AQI recorded in
June35AQI
Lowest AQI recorded in
March20AQI
Most & Least Polluted Years Over the Last 1 Years
Most Polluted Year Recorded
2025(Avg.)
28AQILeast Polluted Year Recorded
2025(Avg.)
28AQIRedwood City's annual 2025 AQI (28) shows an average percentage change of NaN% (improved AQI) compared to previous years: .
