Seattle, Washington, 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
Seattle, Washington, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
13th Aug 2021
118AQILowest AQI recorded on
7th Aug 2021
12AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 28 of Good air quality, showing improvement over 2022 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 1st Aug - 2nd Aug 2025
Seattle, Washington, United States
AQI
Day
Night
.
5 AM1st Aug 2025
9 PM
4 AM2nd Aug 2025
Day time
Avg. Highest Time
6PM1st Aug
30AQI
Avg. Lowest Time
8AM1st Aug
19AQI
Night time
Avg. Highest Time
3AM2nd Aug
39AQI
Avg. Lowest Time
1AM2nd Aug
32AQI
In the last 24 hours,
Seattle's AQI reached its highest point of 39 at 3 AM during the Night, while the lowest point, 19, was recorded at 8 AM during the Day between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Seattle, Washington, United States
JulAug
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 - 31st31st - 01st01st - 02nd02nd
Day
Night
3rd Jul 2025185 AMAQI
3rd Jul 2025176 AMAQI
3rd Jul 2025207 AMAQI
3rd Jul 2025198 AMAQI
3rd Jul 2025209 AMAQI
3rd Jul 20252110 AMAQI
3rd Jul 20252011 AMAQI
3rd Jul 20252112 PMAQI
3rd Jul 2025201 PMAQI
3rd Jul 2025222 PMAQI
3rd Jul 2025203 PMAQI
3rd Jul 2025214 PMAQI
3rd Jul 2025225 PMAQI
3rd Jul 2025206 PMAQI
3rd Jul 2025207 PMAQI
3rd Jul 2025208 PMAQI
3rd Jul 2025239 PMAQI
3rd Jul 20252210 PMAQI
3rd Jul 20252211 PMAQI
4th Jul 20252112 AMAQI
4th Jul 2025211 AMAQI
4th Jul 2025192 AMAQI
4th Jul 2025193 AMAQI
4th Jul 2025204 AMAQI
17°C14/21°C
4th Jul 2025215 AMAQI
4th Jul 2025226 AMAQI
4th Jul 2025217 AMAQI
4th Jul 2025208 AMAQI
4th Jul 2025219 AMAQI
4th Jul 20252810 AMAQI
4th Jul 20252611 AMAQI
4th Jul 20252312 PMAQI
4th Jul 2025251 PMAQI
4th Jul 2025232 PMAQI
4th Jul 2025223 PMAQI
4th Jul 2025214 PMAQI
4th Jul 2025215 PMAQI
4th Jul 2025226 PMAQI
4th Jul 2025227 PMAQI
4th Jul 2025228 PMAQI
4th Jul 2025249 PMAQI
4th Jul 20252310 PMAQI
4th Jul 20252311 PMAQI
5th Jul 20252812 AMAQI
5th Jul 2025481 AMAQI
5th Jul 2025412 AMAQI
5th Jul 2025453 AMAQI
5th Jul 2025574 AMAQI
17°C12/23°C
5th Jul 2025535 AMAQI
5th Jul 2025486 AMAQI
5th Jul 2025457 AMAQI
5th Jul 2025408 AMAQI
5th Jul 2025399 AMAQI
5th Jul 20253710 AMAQI
5th Jul 20253911 AMAQI
5th Jul 20253712 PMAQI
5th Jul 2025401 PMAQI
5th Jul 2025382 PMAQI
5th Jul 2025393 PMAQI
5th Jul 2025394 PMAQI
5th Jul 2025395 PMAQI
5th Jul 2025386 PMAQI
5th Jul 2025377 PMAQI
5th Jul 2025378 PMAQI
5th Jul 2025389 PMAQI
5th Jul 20253710 PMAQI
5th Jul 20253711 PMAQI
6th Jul 20254012 AMAQI
6th Jul 2025351 AMAQI
6th Jul 2025322 AMAQI
6th Jul 2025303 AMAQI
6th Jul 2025254 AMAQI
18°C15/23°C
6th Jul 2025285 AMAQI
6th Jul 2025316 AMAQI
6th Jul 2025287 AMAQI
6th Jul 2025268 AMAQI
6th Jul 2025259 AMAQI
6th Jul 20252410 AMAQI
6th Jul 20252411 AMAQI
6th Jul 20252512 PMAQI
6th Jul 2025271 PMAQI
6th Jul 2025262 PMAQI
6th Jul 2025283 PMAQI
6th Jul 2025284 PMAQI
6th Jul 2025295 PMAQI
6th Jul 2025276 PMAQI
6th Jul 2025277 PMAQI
6th Jul 2025258 PMAQI
6th Jul 2025259 PMAQI
6th Jul 20252510 PMAQI
6th Jul 20252611 PMAQI
7th Jul 20252712 AMAQI
7th Jul 2025261 AMAQI
7th Jul 2025262 AMAQI
7th Jul 2025253 AMAQI
7th Jul 2025214 AMAQI
20°C13/28°C
7th Jul 2025205 AMAQI
7th Jul 2025226 AMAQI
7th Jul 2025217 AMAQI
7th Jul 2025218 AMAQI
7th Jul 2025229 AMAQI
7th Jul 20252410 AMAQI
7th Jul 20252711 AMAQI
7th Jul 20252612 PMAQI
7th Jul 2025261 PMAQI
7th Jul 2025282 PMAQI
7th Jul 2025253 PMAQI
7th Jul 2025244 PMAQI
7th Jul 2025245 PMAQI
7th Jul 2025246 PMAQI
7th Jul 2025247 PMAQI
7th Jul 2025258 PMAQI
7th Jul 2025239 PMAQI
7th Jul 20252310 PMAQI
7th Jul 20252411 PMAQI
8th Jul 20252512 AMAQI
8th Jul 2025291 AMAQI
8th Jul 2025262 AMAQI
8th Jul 2025233 AMAQI
8th Jul 2025224 AMAQI
22°C15/30°C
8th Jul 2025255 AMAQI
8th Jul 2025226 AMAQI
8th Jul 2025227 AMAQI
8th Jul 2025258 AMAQI
8th Jul 2025289 AMAQI
8th Jul 20252910 AMAQI
8th Jul 20253411 AMAQI
8th Jul 20253312 PMAQI
8th Jul 2025351 PMAQI
8th Jul 2025322 PMAQI
8th Jul 2025283 PMAQI
8th Jul 2025284 PMAQI
8th Jul 2025295 PMAQI
8th Jul 2025296 PMAQI
8th Jul 2025287 PMAQI
8th Jul 2025298 PMAQI
8th Jul 2025289 PMAQI
8th Jul 20252710 PMAQI
8th Jul 20252611 PMAQI
9th Jul 20252512 AMAQI
9th Jul 2025211 AMAQI
9th Jul 2025182 AMAQI
9th Jul 2025183 AMAQI
9th Jul 2025164 AMAQI
23°C17/32°C
9th Jul 2025165 AMAQI
9th Jul 2025196 AMAQI
9th Jul 2025207 AMAQI
9th Jul 2025198 AMAQI
9th Jul 2025209 AMAQI
9th Jul 20251810 AMAQI
9th Jul 20251811 AMAQI
9th Jul 20251912 PMAQI
9th Jul 2025191 PMAQI
9th Jul 2025182 PMAQI
9th Jul 2025183 PMAQI
9th Jul 2025184 PMAQI
9th Jul 2025185 PMAQI
9th Jul 2025196 PMAQI
9th Jul 2025197 PMAQI
9th Jul 2025208 PMAQI
9th Jul 2025199 PMAQI
9th Jul 20252010 PMAQI
9th Jul 20252011 PMAQI
10th Jul 20252212 AMAQI
10th Jul 2025221 AMAQI
10th Jul 2025232 AMAQI
10th Jul 2025223 AMAQI
10th Jul 2025204 AMAQI
20°C16/25°C
10th Jul 2025205 AMAQI
10th Jul 2025196 AMAQI
10th Jul 2025197 AMAQI
10th Jul 2025188 AMAQI
10th Jul 2025209 AMAQI
10th Jul 20252310 AMAQI
10th Jul 20252211 AMAQI
10th Jul 20252112 PMAQI
10th Jul 2025221 PMAQI
10th Jul 2025212 PMAQI
10th Jul 2025203 PMAQI
10th Jul 2025214 PMAQI
10th Jul 2025225 PMAQI
10th Jul 2025236 PMAQI
10th Jul 2025227 PMAQI
10th Jul 2025228 PMAQI
10th Jul 2025229 PMAQI
10th Jul 20252210 PMAQI
10th Jul 20252211 PMAQI
11th Jul 20252212 AMAQI
11th Jul 2025241 AMAQI
11th Jul 2025262 AMAQI
11th Jul 2025263 AMAQI
11th Jul 2025264 AMAQI
18°C14/25°C
11th Jul 2025255 AMAQI
11th Jul 2025296 AMAQI
11th Jul 2025277 AMAQI
11th Jul 2025238 AMAQI
11th Jul 2025229 AMAQI
11th Jul 20252510 AMAQI
11th Jul 20253011 AMAQI
11th Jul 20252912 PMAQI
11th Jul 2025291 PMAQI
11th Jul 2025302 PMAQI
11th Jul 2025273 PMAQI
11th Jul 2025274 PMAQI
11th Jul 2025265 PMAQI
11th Jul 2025256 PMAQI
11th Jul 2025267 PMAQI
11th Jul 2025268 PMAQI
11th Jul 2025269 PMAQI
11th Jul 20252810 PMAQI
11th Jul 20252611 PMAQI
12th Jul 20252512 AMAQI
12th Jul 2025241 AMAQI
12th Jul 2025232 AMAQI
12th Jul 2025213 AMAQI
12th Jul 2025184 AMAQI
21°C14/30°C
12th Jul 2025195 AMAQI
12th Jul 2025186 AMAQI
12th Jul 2025217 AMAQI
12th Jul 2025228 AMAQI
12th Jul 2025199 AMAQI
12th Jul 20251810 AMAQI
12th Jul 20251811 AMAQI
12th Jul 20251912 PMAQI
12th Jul 2025191 PMAQI
12th Jul 2025212 PMAQI
12th Jul 2025233 PMAQI
12th Jul 2025224 PMAQI
12th Jul 2025205 PMAQI
12th Jul 2025216 PMAQI
12th Jul 2025217 PMAQI
12th Jul 2025228 PMAQI
12th Jul 2025239 PMAQI
12th Jul 20252410 PMAQI
12th Jul 20252411 PMAQI
13th Jul 20252512 AMAQI
13th Jul 2025261 AMAQI
13th Jul 2025282 AMAQI
13th Jul 2025263 AMAQI
13th Jul 2025264 AMAQI
22°C17/30°C
13th Jul 2025265 AMAQI
13th Jul 2025296 AMAQI
13th Jul 2025287 AMAQI
13th Jul 2025308 AMAQI
13th Jul 2025339 AMAQI
13th Jul 20253010 AMAQI
13th Jul 20253311 AMAQI
13th Jul 20253112 PMAQI
13th Jul 2025321 PMAQI
13th Jul 2025332 PMAQI
13th Jul 2025303 PMAQI
13th Jul 2025284 PMAQI
13th Jul 2025285 PMAQI
13th Jul 2025286 PMAQI
13th Jul 2025307 PMAQI
13th Jul 2025328 PMAQI
13th Jul 2025279 PMAQI
13th Jul 20252710 PMAQI
13th Jul 20252711 PMAQI
14th Jul 20252712 AMAQI
14th Jul 2025221 AMAQI
14th Jul 2025182 AMAQI
14th Jul 2025233 AMAQI
14th Jul 2025204 AMAQI
24°C18/33°C
14th Jul 2025205 AMAQI
14th Jul 2025196 AMAQI
14th Jul 2025177 AMAQI
14th Jul 2025208 AMAQI
14th Jul 2025249 AMAQI
14th Jul 20252310 AMAQI
14th Jul 20252611 AMAQI
14th Jul 20252612 PMAQI
14th Jul 2025261 PMAQI
14th Jul 2025282 PMAQI
14th Jul 2025253 PMAQI
14th Jul 2025264 PMAQI
14th Jul 2025265 PMAQI
14th Jul 2025266 PMAQI
14th Jul 2025247 PMAQI
14th Jul 2025268 PMAQI
14th Jul 2025289 PMAQI
14th Jul 20252910 PMAQI
14th Jul 20252711 PMAQI
15th Jul 20252512 AMAQI
15th Jul 2025241 AMAQI
15th Jul 2025242 AMAQI
15th Jul 2025243 AMAQI
15th Jul 2025274 AMAQI
19°C17/23°C
15th Jul 2025285 AMAQI
15th Jul 2025306 AMAQI
15th Jul 2025287 AMAQI
15th Jul 2025318 AMAQI
15th Jul 2025299 AMAQI
15th Jul 20253110 AMAQI
15th Jul 20253311 AMAQI
15th Jul 20253412 PMAQI
15th Jul 2025321 PMAQI
15th Jul 2025302 PMAQI
15th Jul 2025293 PMAQI
15th Jul 2025294 PMAQI
15th Jul 2025305 PMAQI
15th Jul 2025296 PMAQI
15th Jul 2025307 PMAQI
15th Jul 2025318 PMAQI
15th Jul 2025309 PMAQI
15th Jul 20252910 PMAQI
15th Jul 20253011 PMAQI
16th Jul 20253212 AMAQI
16th Jul 2025331 AMAQI
16th Jul 2025332 AMAQI
16th Jul 2025373 AMAQI
16th Jul 2025384 AMAQI
23°C15/31°C
16th Jul 2025405 AMAQI
16th Jul 2025416 AMAQI
16th Jul 2025447 AMAQI
16th Jul 2025428 AMAQI
16th Jul 2025459 AMAQI
16th Jul 20254210 AMAQI
16th Jul 20254611 AMAQI
16th Jul 20254412 PMAQI
16th Jul 2025491 PMAQI
16th Jul 2025482 PMAQI
16th Jul 2025433 PMAQI
16th Jul 2025424 PMAQI
16th Jul 2025415 PMAQI
16th Jul 2025386 PMAQI
16th Jul 2025397 PMAQI
16th Jul 2025408 PMAQI
16th Jul 2025389 PMAQI
16th Jul 20253810 PMAQI
16th Jul 20254011 PMAQI
17th Jul 20253812 AMAQI
17th Jul 2025361 AMAQI
17th Jul 2025382 AMAQI
17th Jul 2025383 AMAQI
17th Jul 2025454 AMAQI
27°C20/35°C
17th Jul 2025465 AMAQI
17th Jul 2025436 AMAQI
17th Jul 2025457 AMAQI
17th Jul 2025468 AMAQI
17th Jul 2025489 AMAQI
17th Jul 20255110 AMAQI
17th Jul 20255011 AMAQI
17th Jul 20255012 PMAQI
17th Jul 2025501 PMAQI
17th Jul 2025482 PMAQI
17th Jul 2025483 PMAQI
17th Jul 2025464 PMAQI
17th Jul 2025475 PMAQI
17th Jul 2025466 PMAQI
17th Jul 2025457 PMAQI
17th Jul 2025468 PMAQI
17th Jul 2025489 PMAQI
17th Jul 20254410 PMAQI
17th Jul 20254411 PMAQI
18th Jul 20254512 AMAQI
18th Jul 2025431 AMAQI
18th Jul 2025432 AMAQI
18th Jul 2025493 AMAQI
18th Jul 2025484 AMAQI
23°C17/31°C
18th Jul 2025495 AMAQI
18th Jul 2025466 AMAQI
18th Jul 2025457 AMAQI
18th Jul 2025438 AMAQI
18th Jul 2025449 AMAQI
18th Jul 20254410 AMAQI
18th Jul 20254311 AMAQI
18th Jul 20254012 PMAQI
18th Jul 2025391 PMAQI
18th Jul 2025382 PMAQI
18th Jul 2025423 PMAQI
18th Jul 2025404 PMAQI
18th Jul 2025395 PMAQI
18th Jul 2025406 PMAQI
18th Jul 2025417 PMAQI
18th Jul 2025418 PMAQI
18th Jul 2025369 PMAQI
18th Jul 20253510 PMAQI
18th Jul 20253311 PMAQI
19th Jul 20253212 AMAQI
19th Jul 2025301 AMAQI
19th Jul 2025332 AMAQI
19th Jul 2025343 AMAQI
19th Jul 2025324 AMAQI
18°C16/20°C
19th Jul 2025295 AMAQI
19th Jul 2025266 AMAQI
19th Jul 2025307 AMAQI
19th Jul 2025278 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20253110 AMAQI
19th Jul 20253411 AMAQI
19th Jul 20253212 PMAQI
19th Jul 2025291 PMAQI
19th Jul 2025292 PMAQI
19th Jul 2025303 PMAQI
19th Jul 2025304 PMAQI
19th Jul 2025295 PMAQI
19th Jul 2025296 PMAQI
19th Jul 2025307 PMAQI
19th Jul 2025318 PMAQI
19th Jul 2025339 PMAQI
19th Jul 20253310 PMAQI
19th Jul 20253511 PMAQI
20th Jul 20253512 AMAQI
20th Jul 2025341 AMAQI
20th Jul 2025312 AMAQI
20th Jul 2025333 AMAQI
20th Jul 2025314 AMAQI
17°C14/20°C
20th Jul 2025295 AMAQI
20th Jul 2025256 AMAQI
20th Jul 2025257 AMAQI
20th Jul 2025248 AMAQI
20th Jul 2025249 AMAQI
20th Jul 20252510 AMAQI
20th Jul 20252611 AMAQI
20th Jul 20252512 PMAQI
20th Jul 2025251 PMAQI
20th Jul 2025262 PMAQI
20th Jul 2025303 PMAQI
20th Jul 2025314 PMAQI
20th Jul 2025295 PMAQI
20th Jul 2025296 PMAQI
20th Jul 2025287 PMAQI
20th Jul 2025278 PMAQI
20th Jul 2025269 PMAQI
20th Jul 20252810 PMAQI
20th Jul 20252811 PMAQI
21st Jul 20253112 AMAQI
21st Jul 2025291 AMAQI
21st Jul 2025332 AMAQI
21st Jul 2025303 AMAQI
21st Jul 2025324 AMAQI
18°C14/22°C
21st Jul 2025325 AMAQI
21st Jul 2025336 AMAQI
21st Jul 2025317 AMAQI
21st Jul 2025328 AMAQI
21st Jul 2025369 AMAQI
21st Jul 20253410 AMAQI
21st Jul 20253511 AMAQI
21st Jul 20253612 PMAQI
21st Jul 2025371 PMAQI
21st Jul 2025372 PMAQI
21st Jul 2025373 PMAQI
21st Jul 2025354 PMAQI
21st Jul 2025345 PMAQI
21st Jul 2025336 PMAQI
21st Jul 2025337 PMAQI
21st Jul 2025348 PMAQI
21st Jul 2025359 PMAQI
21st Jul 20253510 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253112 AMAQI
22nd Jul 2025311 AMAQI
22nd Jul 2025272 AMAQI
22nd Jul 2025303 AMAQI
22nd Jul 2025274 AMAQI
19°C14/26°C
22nd Jul 2025285 AMAQI
22nd Jul 2025266 AMAQI
22nd Jul 2025287 AMAQI
22nd Jul 2025288 AMAQI
22nd Jul 2025299 AMAQI
22nd Jul 20252810 AMAQI
22nd Jul 20252711 AMAQI
22nd Jul 20252812 PMAQI
22nd Jul 2025281 PMAQI
22nd Jul 2025272 PMAQI
22nd Jul 2025283 PMAQI
22nd Jul 2025284 PMAQI
22nd Jul 2025275 PMAQI
22nd Jul 2025266 PMAQI
22nd Jul 2025277 PMAQI
22nd Jul 2025288 PMAQI
22nd Jul 2025279 PMAQI
22nd Jul 20253010 PMAQI
22nd Jul 20253011 PMAQI
23rd Jul 20253212 AMAQI
23rd Jul 2025341 AMAQI
23rd Jul 2025352 AMAQI
23rd Jul 2025343 AMAQI
23rd Jul 2025324 AMAQI
19°C15/23°C
23rd Jul 2025275 AMAQI
23rd Jul 2025276 AMAQI
23rd Jul 2025267 AMAQI
23rd Jul 2025308 AMAQI
23rd Jul 2025319 AMAQI
23rd Jul 20252910 AMAQI
23rd Jul 20253011 AMAQI
23rd Jul 20252912 PMAQI
23rd Jul 2025311 PMAQI
23rd Jul 2025312 PMAQI
23rd Jul 2025323 PMAQI
23rd Jul 2025304 PMAQI
23rd Jul 2025325 PMAQI
23rd Jul 2025326 PMAQI
23rd Jul 2025317 PMAQI
23rd Jul 2025328 PMAQI
23rd Jul 2025339 PMAQI
23rd Jul 20253510 PMAQI
23rd Jul 20253511 PMAQI
24th Jul 20253312 AMAQI
24th Jul 2025341 AMAQI
24th Jul 2025352 AMAQI
24th Jul 2025363 AMAQI
24th Jul 2025354 AMAQI
23°C17/31°C
24th Jul 2025285 AMAQI
24th Jul 2025296 AMAQI
24th Jul 2025327 AMAQI
24th Jul 2025288 AMAQI
24th Jul 2025279 AMAQI
24th Jul 20252710 AMAQI
24th Jul 20253011 AMAQI
24th Jul 20252812 PMAQI
24th Jul 2025261 PMAQI
24th Jul 2025272 PMAQI
24th Jul 2025273 PMAQI
24th Jul 2025274 PMAQI
24th Jul 2025275 PMAQI
24th Jul 2025276 PMAQI
24th Jul 2025317 PMAQI
24th Jul 2025298 PMAQI
24th Jul 2025269 PMAQI
24th Jul 20252510 PMAQI
24th Jul 20252611 PMAQI
25th Jul 20252612 AMAQI
25th Jul 2025251 AMAQI
25th Jul 2025252 AMAQI
25th Jul 2025263 AMAQI
25th Jul 2025244 AMAQI
19°C16/23°C
25th Jul 2025235 AMAQI
25th Jul 2025206 AMAQI
25th Jul 2025217 AMAQI
25th Jul 2025208 AMAQI
25th Jul 2025219 AMAQI
25th Jul 20252210 AMAQI
25th Jul 20252111 AMAQI
25th Jul 20252112 PMAQI
25th Jul 2025201 PMAQI
25th Jul 2025222 PMAQI
25th Jul 2025213 PMAQI
25th Jul 2025214 PMAQI
25th Jul 2025225 PMAQI
25th Jul 2025256 PMAQI
25th Jul 2025237 PMAQI
25th Jul 2025248 PMAQI
25th Jul 2025289 PMAQI
25th Jul 20252810 PMAQI
25th Jul 20252811 PMAQI
26th Jul 20252912 AMAQI
26th Jul 2025281 AMAQI
26th Jul 2025322 AMAQI
26th Jul 2025313 AMAQI
26th Jul 2025294 AMAQI
16°C14/18°C
26th Jul 2025325 AMAQI
26th Jul 2025276 AMAQI
26th Jul 2025267 AMAQI
26th Jul 2025258 AMAQI
26th Jul 2025259 AMAQI
26th Jul 20252610 AMAQI
26th Jul 20252711 AMAQI
26th Jul 20252812 PMAQI
26th Jul 2025291 PMAQI
26th Jul 2025302 PMAQI
26th Jul 2025293 PMAQI
26th Jul 2025294 PMAQI
26th Jul 2025305 PMAQI
26th Jul 2025296 PMAQI
26th Jul 2025307 PMAQI
26th Jul 2025298 PMAQI
26th Jul 2025279 PMAQI
26th Jul 20253010 PMAQI
26th Jul 20253011 PMAQI
27th Jul 20253112 AMAQI
27th Jul 2025281 AMAQI
27th Jul 2025302 AMAQI
27th Jul 2025343 AMAQI
27th Jul 2025394 AMAQI
18°C14/25°C
27th Jul 2025365 AMAQI
27th Jul 2025356 AMAQI
27th Jul 2025347 AMAQI
27th Jul 2025318 AMAQI
27th Jul 2025319 AMAQI
27th Jul 20252810 AMAQI
27th Jul 20252811 AMAQI
27th Jul 20252512 PMAQI
27th Jul 2025281 PMAQI
27th Jul 2025282 PMAQI
27th Jul 2025313 PMAQI
27th Jul 2025304 PMAQI
27th Jul 2025305 PMAQI
27th Jul 2025286 PMAQI
27th Jul 2025317 PMAQI
27th Jul 2025308 PMAQI
27th Jul 2025269 PMAQI
27th Jul 20252910 PMAQI
27th Jul 20253111 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025291 AMAQI
28th Jul 2025272 AMAQI
28th Jul 2025273 AMAQI
28th Jul 2025284 AMAQI
20°C15/27°C
28th Jul 2025315 AMAQI
28th Jul 2025276 AMAQI
28th Jul 2025307 AMAQI
28th Jul 2025358 AMAQI
28th Jul 2025319 AMAQI
28th Jul 20253310 AMAQI
28th Jul 20253211 AMAQI
28th Jul 20253212 PMAQI
28th Jul 2025361 PMAQI
28th Jul 2025322 PMAQI
28th Jul 2025303 PMAQI
28th Jul 2025294 PMAQI
28th Jul 2025285 PMAQI
28th Jul 2025286 PMAQI
28th Jul 2025307 PMAQI
28th Jul 2025318 PMAQI
28th Jul 2025339 PMAQI
28th Jul 20253310 PMAQI
28th Jul 20253311 PMAQI
29th Jul 20253212 AMAQI
29th Jul 2025331 AMAQI
29th Jul 2025322 AMAQI
29th Jul 2025283 AMAQI
29th Jul 2025264 AMAQI
21°C14/29°C
29th Jul 2025245 AMAQI
29th Jul 2025226 AMAQI
29th Jul 2025267 AMAQI
29th Jul 2025328 AMAQI
29th Jul 2025299 AMAQI
29th Jul 20252510 AMAQI
29th Jul 20252511 AMAQI
29th Jul 20253012 PMAQI
29th Jul 2025281 PMAQI
29th Jul 2025332 PMAQI
29th Jul 2025323 PMAQI
29th Jul 2025314 PMAQI
29th Jul 2025325 PMAQI
29th Jul 2025326 PMAQI
29th Jul 2025327 PMAQI
29th Jul 2025328 PMAQI
29th Jul 2025339 PMAQI
29th Jul 20253310 PMAQI
29th Jul 20253311 PMAQI
30th Jul 20253312 AMAQI
30th Jul 2025351 AMAQI
30th Jul 2025312 AMAQI
30th Jul 2025303 AMAQI
30th Jul 2025324 AMAQI
22°C15/31°C
30th Jul 2025335 AMAQI
30th Jul 2025306 AMAQI
30th Jul 2025307 AMAQI
30th Jul 2025298 AMAQI
30th Jul 2025289 AMAQI
30th Jul 20252810 AMAQI
30th Jul 20253311 AMAQI
30th Jul 20253512 PMAQI
30th Jul 2025361 PMAQI
30th Jul 2025372 PMAQI
30th Jul 2025373 PMAQI
30th Jul 2025374 PMAQI
30th Jul 2025375 PMAQI
30th Jul 2025376 PMAQI
30th Jul 2025377 PMAQI
30th Jul 2025378 PMAQI
30th Jul 2025359 PMAQI
30th Jul 20253310 PMAQI
30th Jul 20253411 PMAQI
31st Jul 20253312 AMAQI
31st Jul 2025291 AMAQI
31st Jul 2025282 AMAQI
31st Jul 2025263 AMAQI
31st Jul 2025244 AMAQI
23°C16/32°C
31st Jul 2025245 AMAQI
31st Jul 2025266 AMAQI
31st Jul 2025297 AMAQI
31st Jul 2025288 AMAQI
31st Jul 2025279 AMAQI
31st Jul 20252810 AMAQI
31st Jul 20252511 AMAQI
31st Jul 20252612 PMAQI
31st Jul 2025261 PMAQI
31st Jul 2025262 PMAQI
31st Jul 2025283 PMAQI
31st Jul 2025314 PMAQI
31st Jul 2025335 PMAQI
31st Jul 2025356 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025338 PMAQI
31st Jul 2025449 PMAQI
31st Jul 20254610 PMAQI
31st Jul 20254211 PMAQI
1st Aug 20253912 AMAQI
1st Aug 2025321 AMAQI
1st Aug 2025302 AMAQI
1st Aug 2025303 AMAQI
1st Aug 2025314 AMAQI
23°C18/31°C
1st Aug 2025275 AMAQI
1st Aug 2025236 AMAQI
1st Aug 2025237 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025219 AMAQI
1st Aug 20252310 AMAQI
1st Aug 20252711 AMAQI
1st Aug 20252712 PMAQI
1st Aug 2025271 PMAQI
1st Aug 2025252 PMAQI
1st Aug 2025243 PMAQI
1st Aug 2025244 PMAQI
1st Aug 2025235 PMAQI
1st Aug 2025306 PMAQI
1st Aug 2025297 PMAQI
1st Aug 2025308 PMAQI
1st Aug 2025339 PMAQI
1st Aug 20253710 PMAQI
1st Aug 20253211 PMAQI
2nd Aug 20253212 AMAQI
2nd Aug 2025321 AMAQI
2nd Aug 2025352 AMAQI
2nd Aug 2025393 AMAQI
2nd Aug 2025374 AMAQI
22°C17/27°C
2nd Aug 2025335 AMAQI
5 AM2nd Aug 2025296 AMAQI
2nd Aug 2025277 AMAQI
2nd Aug 2025228 AMAQI
2nd Aug 2025239 AMAQI
2nd Aug 20252410 AMAQI
2nd Aug 20252011 AMAQI
2nd Aug 20251512 PMAQI
1 PM
9 PM
1 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 9 PM
29AQI
17 hours / Day
510 hours / Month
Avg. Lowest Time
5 AM - 9 PM
29AQI
17 hours / Day
510 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 9 PM (Avg. 29), while the lowest AQI was between 5 AM to 9 PM (Avg. 29).
Night time
Avg. Highest Time
12 AM - 11 PM
30AQI
7 hours / Day
210 hours / Month
Avg. Lowest Time
12 AM - 11 PM
30AQI
7 hours / Day
210 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 30), while the lowest AQI was between 12 AM to 11 PM (Avg. 30).
2025 Days Vs Air Quality
Seattle, Washington, United States
2025
97%
207
3%
6
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
207 DaysModerate
6 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 97%
Health Risk Level:
Very Low
In 2025, 97% of 214 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
Seattle, Washington, United States
AQI levels in 2025
AQI
PM2.5
PM10
CO
SO2
NO2
O3
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
Jan.
Feb.
Mar.
Apr.
May
Jun.
Jul.
Aug.
Sep.
Oct.
Nov.
Dec.
1st January 2025
31AQI
31AQI
2nd January 2025
36AQI
36AQI
3rd January 2025
25AQI
25AQI
4th January 2025
31AQI
31AQI
5th January 2025
28AQI
28AQI
6th January 2025
23AQI
23AQI
7th January 2025
37AQI
37AQI
8th January 2025
33AQI
33AQI
9th January 2025
45AQI
45AQI
10th January 2025
34AQI
34AQI
11th January 2025
30AQI
30AQI
12th January 2025
47AQI
47AQI
13th January 2025
45AQI
45AQI
14th January 2025
44AQI
44AQI
15th January 2025
46AQI
46AQI
16th January 2025
43AQI
43AQI
17th January 2025
38AQI
38AQI
18th January 2025
37AQI
37AQI
19th January 2025
44AQI
44AQI
20th January 2025
46AQI
46AQI
21st January 2025
57AQI
57AQI
22nd January 2025
48AQI
48AQI
23rd January 2025
55AQI
55AQI
24th January 2025
47AQI
47AQI
25th January 2025
40AQI
40AQI
26th January 2025
51AQI
51AQI
27th January 2025
48AQI
48AQI
28th January 2025
55AQI
55AQI
29th January 2025
61AQI
61AQI
30th January 2025
54AQI
54AQI
31st January 2025
30AQI
30AQI
1st February 2025
21AQI
21AQI
2nd February 2025
21AQI
21AQI
3rd February 2025
23AQI
23AQI
4th February 2025
28AQI
28AQI
5th February 2025
21AQI
21AQI
6th February 2025
25AQI
25AQI
7th February 2025
29AQI
29AQI
8th February 2025
29AQI
29AQI
9th February 2025
37AQI
37AQI
10th February 2025
30AQI
30AQI
11th February 2025
24AQI
24AQI
12th February 2025
28AQI
28AQI
13th February 2025
32AQI
32AQI
14th February 2025
42AQI
42AQI
15th February 2025
42AQI
42AQI
16th February 2025
25AQI
25AQI
17th February 2025
26AQI
26AQI
18th February 2025
27AQI
27AQI
19th February 2025
22AQI
22AQI
20th February 2025
22AQI
22AQI
21st February 2025
29AQI
29AQI
22nd February 2025
26AQI
26AQI
23rd February 2025
22AQI
22AQI
24th February 2025
28AQI
28AQI
25th February 2025
19AQI
19AQI
26th February 2025
33AQI
33AQI
27th February 2025
28AQI
28AQI
28th February 2025
39AQI
39AQI
1st March 2025
47AQI
47AQI
2nd March 2025
35AQI
35AQI
3rd March 2025
30AQI
30AQI
4th March 2025
23AQI
23AQI
5th March 2025
25AQI
25AQI
6th March 2025
24AQI
24AQI
7th March 2025
28AQI
28AQI
8th March 2025
27AQI
27AQI
9th March 2025
25AQI
25AQI
10th March 2025
21AQI
21AQI
11th March 2025
25AQI
25AQI
12th March 2025
24AQI
24AQI
13th March 2025
21AQI
21AQI
14th March 2025
22AQI
22AQI
15th March 2025
24AQI
24AQI
16th March 2025
22AQI
22AQI
17th March 2025
24AQI
24AQI
18th March 2025
21AQI
21AQI
19th March 2025
20AQI
20AQI
20th March 2025
18AQI
18AQI
21st March 2025
23AQI
23AQI
22nd March 2025
21AQI
21AQI
23rd March 2025
21AQI
21AQI
24th March 2025
19AQI
19AQI
25th March 2025
26AQI
26AQI
26th March 2025
27AQI
27AQI
27th March 2025
20AQI
20AQI
28th March 2025
18AQI
18AQI
29th March 2025
20AQI
20AQI
30th March 2025
22AQI
22AQI
31st March 2025
21AQI
21AQI
1st April 2025
22AQI
22AQI
2nd April 2025
23AQI
23AQI
3rd April 2025
29AQI
29AQI
4th April 2025
33AQI
33AQI
5th April 2025
36AQI
36AQI
6th April 2025
29AQI
29AQI
7th April 2025
18AQI
18AQI
8th April 2025
16AQI
16AQI
9th April 2025
19AQI
19AQI
10th April 2025
28AQI
28AQI
11th April 2025
22AQI
22AQI
12th April 2025
22AQI
22AQI
13th April 2025
21AQI
21AQI
14th April 2025
24AQI
24AQI
15th April 2025
25AQI
25AQI
16th April 2025
25AQI
25AQI
17th April 2025
26AQI
26AQI
18th April 2025
29AQI
29AQI
19th April 2025
28AQI
28AQI
20th April 2025
22AQI
22AQI
21st April 2025
19AQI
19AQI
22nd April 2025
22AQI
22AQI
23rd April 2025
26AQI
26AQI
24th April 2025
33AQI
33AQI
25th April 2025
42AQI
42AQI
26th April 2025
46AQI
46AQI
27th April 2025
34AQI
34AQI
28th April 2025
23AQI
23AQI
29th April 2025
20AQI
20AQI
30th April 2025
21AQI
21AQI
1st May 2025
33AQI
33AQI
2nd May 2025
34AQI
34AQI
3rd May 2025
17AQI
17AQI
4th May 2025
20AQI
20AQI
5th May 2025
20AQI
20AQI
6th May 2025
28AQI
28AQI
7th May 2025
26AQI
26AQI
8th May 2025
21AQI
21AQI
9th May 2025
24AQI
24AQI
10th May 2025
25AQI
25AQI
11th May 2025
19AQI
19AQI
12th May 2025
20AQI
20AQI
13th May 2025
26AQI
26AQI
14th May 2025
26AQI
26AQI
15th May 2025
25AQI
25AQI
16th May 2025
19AQI
19AQI
17th May 2025
20AQI
20AQI
18th May 2025
16AQI
16AQI
19th May 2025
20AQI
20AQI
20th May 2025
15AQI
15AQI
21st May 2025
17AQI
17AQI
22nd May 2025
22AQI
22AQI
23rd May 2025
20AQI
20AQI
24th May 2025
21AQI
21AQI
25th May 2025
20AQI
20AQI
26th May 2025
17AQI
17AQI
27th May 2025
22AQI
22AQI
28th May 2025
27AQI
27AQI
29th May 2025
18AQI
18AQI
30th May 2025
23AQI
23AQI
31st May 2025
22AQI
22AQI
1st June 2025
23AQI
23AQI
2nd June 2025
23AQI
23AQI
3rd June 2025
24AQI
24AQI
4th June 2025
22AQI
22AQI
5th June 2025
26AQI
26AQI
6th June 2025
28AQI
28AQI
7th June 2025
34AQI
34AQI
8th June 2025
36AQI
36AQI
9th June 2025
37AQI
37AQI
10th June 2025
43AQI
43AQI
11th June 2025
46AQI
46AQI
12th June 2025
42AQI
42AQI
13th June 2025
34AQI
34AQI
14th June 2025
26AQI
26AQI
15th June 2025
27AQI
27AQI
16th June 2025
28AQI
28AQI
17th June 2025
23AQI
23AQI
18th June 2025
20AQI
20AQI
19th June 2025
20AQI
20AQI
20th June 2025
20AQI
20AQI
21st June 2025
21AQI
21AQI
22nd June 2025
22AQI
22AQI
23rd June 2025
25AQI
25AQI
24th June 2025
37AQI
37AQI
25th June 2025
31AQI
31AQI
26th June 2025
22AQI
22AQI
27th June 2025
19AQI
19AQI
28th June 2025
26AQI
26AQI
29th June 2025
26AQI
26AQI
30th June 2025
26AQI
26AQI
1st July 2025
27AQI
27AQI
2nd July 2025
20AQI
20AQI
3rd July 2025
20AQI
20AQI
4th July 2025
22AQI
22AQI
5th July 2025
41AQI
41AQI
6th July 2025
28AQI
28AQI
7th July 2025
24AQI
24AQI
8th July 2025
27AQI
27AQI
9th July 2025
19AQI
19AQI
10th July 2025
21AQI
21AQI
11th July 2025
26AQI
26AQI
12th July 2025
21AQI
21AQI
13th July 2025
28AQI
28AQI
14th July 2025
24AQI
24AQI
15th July 2025
29AQI
29AQI
16th July 2025
40AQI
40AQI
17th July 2025
45AQI
45AQI
18th July 2025
42AQI
42AQI
19th July 2025
31AQI
31AQI
20th July 2025
28AQI
28AQI
21st July 2025
33AQI
33AQI
22nd July 2025
28AQI
28AQI
23rd July 2025
32AQI
32AQI
24th July 2025
29AQI
29AQI
25th July 2025
24AQI
24AQI
26th July 2025
29AQI
29AQI
27th July 2025
31AQI
31AQI
28th July 2025
31AQI
31AQI
29th July 2025
30AQI
30AQI
30th July 2025
33AQI
33AQI
31st July 2025
30AQI
30AQI
1st August 2025
28AQI
28AQI
42AQI
28AQI
24AQI
26AQI
22AQI
28AQI
29AQI
28AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202528AQI
25
6
28
31
30
31
30
31
1
207
6
Highest AQI recorded in
January42AQI
Lowest AQI recorded in
May22AQI
202428AQI
29
2
29
31
30
30
1
29
29
2
30
1
27
3
31
28
2
26
5
349
16
Highest AQI recorded in
September35AQI
Lowest AQI recorded in
February21AQI
202332AQI
29
2
28
29
2
30
31
30
29
2
25
5
1
29
1
29
2
22
7
30
1
341
22
1
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
April25AQI
202233AQI
25
5
21
1
30
1
30
31
30
22
2
1
18
8
1
13
15
1
2
23
7
31
276
38
2
2
Highest AQI recorded in
October65AQI
Lowest AQI recorded in
May22AQI
202127AQI
29
1
28
30
1
30
31
27
3
30
1
27
3
1
30
31
27
3
31
351
12
1
Highest AQI recorded in
August34AQI
Lowest AQI recorded in
May20AQI
202035AQI
10
3
20
18
29
1
30
1
30
1
18
2
3
4
3
27
4
27
3
26
5
235
20
3
4
3
Highest AQI recorded in
September82AQI
Lowest AQI recorded in
June23AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
35AQILeast Polluted Year Recorded
2021(Avg.)
27AQISeattle's annual 2025 AQI (28) shows an average percentage change of -7.8% (improved AQI) compared to previous years: 2020 (35), 2021 (27), 2022 (33), 2023 (32), 2024 (28).
