Mercer Island, 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
Mercer Island, Washington, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
13th Aug 2021
123AQILowest AQI recorded on
7th Aug 2021
13AQISame Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 47 of Good air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 5th Aug - 6th Aug 2025
Mercer Island, Washington, United States
AQI
Day
Night
.
5 AM5th Aug 2025
8 PM
4 AM6th Aug 2025
Day time
Avg. Highest Time
9AM5th Aug
38AQI
Avg. Lowest Time
6AM5th Aug
27AQI
Night time
Avg. Highest Time
10PM5th Aug
26AQI
Avg. Lowest Time
2AM6th Aug
19AQI
In the last 24 hours,
Mercer Island's AQI reached its highest point of 38 at 9 AM during the Day, while the lowest point, undefined, was recorded at 4 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Mercer Island, Washington, United States
JulAug
07th - 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 - 03rd03rd - 04th04th - 05th05th - 06th06th
Day
Night
7th Jul 2025185 AMAQI
7th Jul 2025196 AMAQI
7th Jul 2025197 AMAQI
7th Jul 2025188 AMAQI
7th Jul 2025229 AMAQI
7th Jul 20251810 AMAQI
7th Jul 20252911 AMAQI
7th Jul 20252312 PMAQI
7th Jul 2025251 PMAQI
7th Jul 2025262 PMAQI
7th Jul 2025263 PMAQI
7th Jul 2025264 PMAQI
7th Jul 2025245 PMAQI
7th Jul 2025236 PMAQI
7th Jul 2025237 PMAQI
7th Jul 2025228 PMAQI
7th Jul 2025229 PMAQI
7th Jul 20252210 PMAQI
7th Jul 20252311 PMAQI
8th Jul 20252512 AMAQI
8th Jul 2025541 AMAQI
8th Jul 2025252 AMAQI
8th Jul 2025233 AMAQI
8th Jul 2025224 AMAQI
22°C15/30°C
8th Jul 2025195 AMAQI
8th Jul 2025196 AMAQI
8th Jul 2025217 AMAQI
8th Jul 2025268 AMAQI
8th Jul 2025259 AMAQI
8th Jul 20252110 AMAQI
8th Jul 20254011 AMAQI
8th Jul 20253212 PMAQI
8th Jul 2025371 PMAQI
8th Jul 2025312 PMAQI
8th Jul 2025303 PMAQI
8th Jul 2025294 PMAQI
8th Jul 2025305 PMAQI
8th Jul 2025306 PMAQI
8th Jul 2025287 PMAQI
8th Jul 2025288 PMAQI
8th Jul 2025269 PMAQI
8th Jul 20252610 PMAQI
8th Jul 20252811 PMAQI
9th Jul 20252512 AMAQI
9th Jul 2025201 AMAQI
9th Jul 2025152 AMAQI
9th Jul 2025163 AMAQI
9th Jul 2025154 AMAQI
23°C17/32°C
9th Jul 2025155 AMAQI
9th Jul 2025156 AMAQI
9th Jul 2025167 AMAQI
9th Jul 2025168 AMAQI
9th Jul 2025179 AMAQI
9th Jul 20251410 AMAQI
9th Jul 20251511 AMAQI
9th Jul 20251612 PMAQI
9th Jul 2025151 PMAQI
9th Jul 2025142 PMAQI
9th Jul 2025163 PMAQI
9th Jul 2025164 PMAQI
9th Jul 2025165 PMAQI
9th Jul 2025166 PMAQI
9th Jul 2025177 PMAQI
9th Jul 2025178 PMAQI
9th Jul 2025189 PMAQI
9th Jul 20251910 PMAQI
9th Jul 20251811 PMAQI
10th Jul 20252012 AMAQI
10th Jul 2025181 AMAQI
10th Jul 2025162 AMAQI
10th Jul 2025183 AMAQI
10th Jul 2025144 AMAQI
20°C16/25°C
10th Jul 2025135 AMAQI
10th Jul 2025146 AMAQI
10th Jul 2025147 AMAQI
10th Jul 2025148 AMAQI
10th Jul 2025159 AMAQI
10th Jul 20251810 AMAQI
10th Jul 20251611 AMAQI
10th Jul 20251612 PMAQI
10th Jul 2025191 PMAQI
10th Jul 2025172 PMAQI
10th Jul 2025163 PMAQI
10th Jul 2025174 PMAQI
10th Jul 2025185 PMAQI
10th Jul 2025186 PMAQI
10th Jul 2025177 PMAQI
10th Jul 2025178 PMAQI
10th Jul 2025179 PMAQI
10th Jul 20252010 PMAQI
10th Jul 20251911 PMAQI
11th Jul 20251812 AMAQI
11th Jul 2025241 AMAQI
11th Jul 2025302 AMAQI
11th Jul 2025363 AMAQI
11th Jul 2025244 AMAQI
18°C14/25°C
11th Jul 2025205 AMAQI
11th Jul 2025226 AMAQI
11th Jul 2025207 AMAQI
11th Jul 2025188 AMAQI
11th Jul 2025189 AMAQI
11th Jul 20252110 AMAQI
11th Jul 20253411 AMAQI
11th Jul 20252612 PMAQI
11th Jul 2025301 PMAQI
11th Jul 2025292 PMAQI
11th Jul 2025263 PMAQI
11th Jul 2025254 PMAQI
11th Jul 2025245 PMAQI
11th Jul 2025236 PMAQI
11th Jul 2025247 PMAQI
11th Jul 2025248 PMAQI
11th Jul 2025259 PMAQI
11th Jul 20252610 PMAQI
11th Jul 20252411 PMAQI
12th Jul 20252412 AMAQI
12th Jul 2025201 AMAQI
12th Jul 2025222 AMAQI
12th Jul 2025173 AMAQI
12th Jul 2025184 AMAQI
21°C14/30°C
12th Jul 2025275 AMAQI
12th Jul 2025166 AMAQI
12th Jul 2025217 AMAQI
12th Jul 2025188 AMAQI
12th Jul 2025179 AMAQI
12th Jul 20251810 AMAQI
12th Jul 20251711 AMAQI
12th Jul 20251812 PMAQI
12th Jul 2025181 PMAQI
12th Jul 2025232 PMAQI
12th Jul 2025223 PMAQI
12th Jul 2025214 PMAQI
12th Jul 2025205 PMAQI
12th Jul 2025206 PMAQI
12th Jul 2025207 PMAQI
12th Jul 2025208 PMAQI
12th Jul 2025209 PMAQI
12th Jul 20252210 PMAQI
12th Jul 20252411 PMAQI
13th Jul 20252612 AMAQI
13th Jul 2025301 AMAQI
13th Jul 2025342 AMAQI
13th Jul 2025233 AMAQI
13th Jul 2025224 AMAQI
22°C17/30°C
13th Jul 2025195 AMAQI
13th Jul 2025226 AMAQI
13th Jul 2025207 AMAQI
13th Jul 2025288 AMAQI
13th Jul 2025369 AMAQI
13th Jul 20252410 AMAQI
13th Jul 20252911 AMAQI
13th Jul 20253012 PMAQI
13th Jul 2025321 PMAQI
13th Jul 2025332 PMAQI
13th Jul 2025293 PMAQI
13th Jul 2025274 PMAQI
13th Jul 2025285 PMAQI
13th Jul 2025276 PMAQI
13th Jul 2025277 PMAQI
13th Jul 2025348 PMAQI
13th Jul 2025269 PMAQI
13th Jul 20252510 PMAQI
13th Jul 20252611 PMAQI
14th Jul 20252412 AMAQI
14th Jul 2025261 AMAQI
14th Jul 2025152 AMAQI
14th Jul 2025163 AMAQI
14th Jul 2025164 AMAQI
24°C18/33°C
14th Jul 2025165 AMAQI
14th Jul 2025156 AMAQI
14th Jul 2025167 AMAQI
14th Jul 2025198 AMAQI
14th Jul 2025209 AMAQI
14th Jul 20252010 AMAQI
14th Jul 20252711 AMAQI
14th Jul 20252212 PMAQI
14th Jul 2025191 PMAQI
14th Jul 2025242 PMAQI
14th Jul 2025223 PMAQI
14th Jul 2025224 PMAQI
14th Jul 2025235 PMAQI
14th Jul 2025236 PMAQI
14th Jul 2025227 PMAQI
14th Jul 2025218 PMAQI
14th Jul 2025229 PMAQI
14th Jul 20252310 PMAQI
14th Jul 20252211 PMAQI
15th Jul 20252112 AMAQI
15th Jul 2025221 AMAQI
15th Jul 2025222 AMAQI
15th Jul 2025243 AMAQI
15th Jul 2025284 AMAQI
19°C17/23°C
15th Jul 2025235 AMAQI
15th Jul 2025306 AMAQI
15th Jul 2025287 AMAQI
15th Jul 2025248 AMAQI
15th Jul 2025279 AMAQI
15th Jul 20252610 AMAQI
15th Jul 20253211 AMAQI
15th Jul 20252812 PMAQI
15th Jul 2025261 PMAQI
15th Jul 2025222 PMAQI
15th Jul 2025273 PMAQI
15th Jul 2025274 PMAQI
15th Jul 2025285 PMAQI
15th Jul 2025276 PMAQI
15th Jul 2025277 PMAQI
15th Jul 2025288 PMAQI
15th Jul 2025269 PMAQI
15th Jul 20252610 PMAQI
15th Jul 20252611 PMAQI
16th Jul 20252812 AMAQI
16th Jul 2025281 AMAQI
16th Jul 2025292 AMAQI
16th Jul 2025303 AMAQI
16th Jul 2025324 AMAQI
23°C15/31°C
16th Jul 2025395 AMAQI
16th Jul 2025426 AMAQI
16th Jul 2025357 AMAQI
16th Jul 2025338 AMAQI
16th Jul 2025379 AMAQI
16th Jul 20253010 AMAQI
16th Jul 20254611 AMAQI
16th Jul 20253612 PMAQI
16th Jul 2025461 PMAQI
16th Jul 2025432 PMAQI
16th Jul 2025403 PMAQI
16th Jul 2025364 PMAQI
16th Jul 2025375 PMAQI
16th Jul 2025346 PMAQI
16th Jul 2025347 PMAQI
16th Jul 2025348 PMAQI
16th Jul 2025329 PMAQI
16th Jul 20253410 PMAQI
16th Jul 20253611 PMAQI
17th Jul 20253412 AMAQI
17th Jul 2025321 AMAQI
17th Jul 2025332 AMAQI
17th Jul 2025343 AMAQI
17th Jul 2025394 AMAQI
27°C20/35°C
17th Jul 2025385 AMAQI
17th Jul 2025366 AMAQI
17th Jul 2025407 AMAQI
17th Jul 2025408 AMAQI
17th Jul 2025469 AMAQI
17th Jul 20254410 AMAQI
17th Jul 20254811 AMAQI
17th Jul 20254912 PMAQI
17th Jul 2025461 PMAQI
17th Jul 2025462 PMAQI
17th Jul 2025463 PMAQI
17th Jul 2025414 PMAQI
17th Jul 2025415 PMAQI
17th Jul 2025446 PMAQI
17th Jul 2025417 PMAQI
17th Jul 2025428 PMAQI
17th Jul 2025449 PMAQI
17th Jul 20254210 PMAQI
17th Jul 20254311 PMAQI
18th Jul 20254212 AMAQI
18th Jul 2025381 AMAQI
18th Jul 2025392 AMAQI
18th Jul 2025403 AMAQI
18th Jul 2025434 AMAQI
23°C17/31°C
18th Jul 2025495 AMAQI
18th Jul 2025386 AMAQI
18th Jul 2025407 AMAQI
18th Jul 2025428 AMAQI
18th Jul 2025399 AMAQI
18th Jul 20253810 AMAQI
18th Jul 20254011 AMAQI
18th Jul 20253412 PMAQI
18th Jul 2025381 PMAQI
18th Jul 2025382 PMAQI
18th Jul 2025403 PMAQI
18th Jul 2025404 PMAQI
18th Jul 2025405 PMAQI
18th Jul 2025416 PMAQI
18th Jul 2025387 PMAQI
18th Jul 2025398 PMAQI
18th Jul 2025379 PMAQI
18th Jul 20253510 PMAQI
18th Jul 20253411 PMAQI
19th Jul 20253512 AMAQI
19th Jul 2025231 AMAQI
19th Jul 2025262 AMAQI
19th Jul 2025253 AMAQI
19th Jul 2025274 AMAQI
18°C16/20°C
19th Jul 2025295 AMAQI
19th Jul 2025266 AMAQI
19th Jul 2025297 AMAQI
19th Jul 2025248 AMAQI
19th Jul 2025249 AMAQI
19th Jul 20252510 AMAQI
19th Jul 20252711 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025251 PMAQI
19th Jul 2025252 PMAQI
19th Jul 2025283 PMAQI
19th Jul 2025274 PMAQI
19th Jul 2025285 PMAQI
19th Jul 2025286 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025288 PMAQI
19th Jul 2025289 PMAQI
19th Jul 20252810 PMAQI
19th Jul 20253011 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025261 AMAQI
20th Jul 2025222 AMAQI
20th Jul 2025273 AMAQI
20th Jul 2025244 AMAQI
17°C14/20°C
20th Jul 2025155 AMAQI
20th Jul 2025226 AMAQI
20th Jul 2025237 AMAQI
20th Jul 2025208 AMAQI
20th Jul 2025189 AMAQI
20th Jul 20252010 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20252212 PMAQI
20th Jul 2025211 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025243 PMAQI
20th Jul 2025264 PMAQI
20th Jul 2025265 PMAQI
20th Jul 2025236 PMAQI
20th Jul 2025227 PMAQI
20th Jul 2025238 PMAQI
20th Jul 2025229 PMAQI
20th Jul 20252310 PMAQI
20th Jul 20252411 PMAQI
21st Jul 20252412 AMAQI
21st Jul 2025211 AMAQI
21st Jul 2025332 AMAQI
21st Jul 2025263 AMAQI
21st Jul 2025334 AMAQI
18°C14/22°C
21st Jul 2025275 AMAQI
21st Jul 2025326 AMAQI
21st Jul 2025347 AMAQI
21st Jul 2025338 AMAQI
21st Jul 2025339 AMAQI
21st Jul 20253010 AMAQI
21st Jul 20253411 AMAQI
21st Jul 20253012 PMAQI
21st Jul 2025321 PMAQI
21st Jul 2025342 PMAQI
21st Jul 2025333 PMAQI
21st Jul 2025324 PMAQI
21st Jul 2025305 PMAQI
21st Jul 2025286 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025308 PMAQI
21st Jul 2025319 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253111 PMAQI
22nd Jul 20252912 AMAQI
22nd Jul 2025241 AMAQI
22nd Jul 2025182 AMAQI
22nd Jul 2025223 AMAQI
22nd Jul 2025234 AMAQI
19°C14/26°C
22nd Jul 2025165 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025197 AMAQI
22nd Jul 2025238 AMAQI
22nd Jul 2025209 AMAQI
22nd Jul 20252210 AMAQI
22nd Jul 20252011 AMAQI
22nd Jul 20251812 PMAQI
22nd Jul 2025241 PMAQI
22nd Jul 2025212 PMAQI
22nd Jul 2025243 PMAQI
22nd Jul 2025224 PMAQI
22nd Jul 2025215 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025227 PMAQI
22nd Jul 2025228 PMAQI
22nd Jul 2025229 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252411 PMAQI
23rd Jul 20252712 AMAQI
23rd Jul 2025421 AMAQI
23rd Jul 2025442 AMAQI
23rd Jul 2025463 AMAQI
23rd Jul 2025334 AMAQI
19°C15/23°C
23rd Jul 2025325 AMAQI
23rd Jul 2025286 AMAQI
23rd Jul 2025287 AMAQI
23rd Jul 2025368 AMAQI
23rd Jul 2025329 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20253611 AMAQI
23rd Jul 20252312 PMAQI
23rd Jul 2025311 PMAQI
23rd Jul 2025322 PMAQI
23rd Jul 2025363 PMAQI
23rd Jul 2025324 PMAQI
23rd Jul 2025325 PMAQI
23rd Jul 2025356 PMAQI
23rd Jul 2025367 PMAQI
23rd Jul 2025328 PMAQI
23rd Jul 2025329 PMAQI
23rd Jul 20253610 PMAQI
23rd Jul 20253611 PMAQI
24th Jul 20253212 AMAQI
24th Jul 2025321 AMAQI
24th Jul 2025272 AMAQI
24th Jul 2025253 AMAQI
24th Jul 2025174 AMAQI
23°C17/31°C
24th Jul 2025205 AMAQI
24th Jul 2025226 AMAQI
24th Jul 2025257 AMAQI
24th Jul 2025198 AMAQI
24th Jul 2025229 AMAQI
24th Jul 20251810 AMAQI
24th Jul 20252511 AMAQI
24th Jul 20252012 PMAQI
24th Jul 2025221 PMAQI
24th Jul 2025222 PMAQI
24th Jul 2025243 PMAQI
24th Jul 2025234 PMAQI
24th Jul 2025235 PMAQI
24th Jul 2025236 PMAQI
24th Jul 2025237 PMAQI
24th Jul 2025238 PMAQI
24th Jul 2025239 PMAQI
24th Jul 20252210 PMAQI
24th Jul 20252111 PMAQI
25th Jul 20252212 AMAQI
25th Jul 2025201 AMAQI
25th Jul 2025212 AMAQI
25th Jul 2025183 AMAQI
25th Jul 2025184 AMAQI
19°C16/23°C
25th Jul 2025195 AMAQI
25th Jul 2025156 AMAQI
25th Jul 2025187 AMAQI
25th Jul 2025148 AMAQI
25th Jul 2025159 AMAQI
25th Jul 20251410 AMAQI
25th Jul 20251511 AMAQI
25th Jul 20251712 PMAQI
25th Jul 2025211 PMAQI
25th Jul 2025162 PMAQI
25th Jul 2025183 PMAQI
25th Jul 2025174 PMAQI
25th Jul 2025195 PMAQI
25th Jul 2025196 PMAQI
25th Jul 2025197 PMAQI
25th Jul 2025208 PMAQI
25th Jul 2025229 PMAQI
25th Jul 20252310 PMAQI
25th Jul 20252411 PMAQI
26th Jul 20252212 AMAQI
26th Jul 2025181 AMAQI
26th Jul 2025262 AMAQI
26th Jul 2025273 AMAQI
26th Jul 2025184 AMAQI
16°C14/18°C
26th Jul 2025265 AMAQI
26th Jul 2025176 AMAQI
26th Jul 2025217 AMAQI
26th Jul 2025218 AMAQI
26th Jul 2025189 AMAQI
26th Jul 20251910 AMAQI
26th Jul 20252511 AMAQI
26th Jul 20252312 PMAQI
26th Jul 2025181 PMAQI
26th Jul 2025262 PMAQI
26th Jul 2025263 PMAQI
26th Jul 2025244 PMAQI
26th Jul 2025245 PMAQI
26th Jul 2025246 PMAQI
26th Jul 2025237 PMAQI
26th Jul 2025248 PMAQI
26th Jul 2025229 PMAQI
26th Jul 20252710 PMAQI
26th Jul 20252611 PMAQI
27th Jul 20252612 AMAQI
27th Jul 2025191 AMAQI
27th Jul 2025322 AMAQI
27th Jul 2025313 AMAQI
27th Jul 2025384 AMAQI
18°C14/25°C
27th Jul 2025365 AMAQI
27th Jul 2025336 AMAQI
27th Jul 2025307 AMAQI
27th Jul 2025268 AMAQI
27th Jul 2025289 AMAQI
27th Jul 20252510 AMAQI
27th Jul 20252611 AMAQI
27th Jul 20252212 PMAQI
27th Jul 2025231 PMAQI
27th Jul 2025272 PMAQI
27th Jul 2025303 PMAQI
27th Jul 2025294 PMAQI
27th Jul 2025305 PMAQI
27th Jul 2025286 PMAQI
27th Jul 2025287 PMAQI
27th Jul 2025278 PMAQI
27th Jul 2025249 PMAQI
27th Jul 20252810 PMAQI
27th Jul 20252811 PMAQI
28th Jul 20253212 AMAQI
28th Jul 2025201 AMAQI
28th Jul 2025182 AMAQI
28th Jul 2025283 AMAQI
28th Jul 2025244 AMAQI
20°C15/27°C
28th Jul 2025225 AMAQI
28th Jul 2025266 AMAQI
28th Jul 2025237 AMAQI
28th Jul 2025288 AMAQI
28th Jul 2025329 AMAQI
28th Jul 20252510 AMAQI
28th Jul 20252511 AMAQI
28th Jul 20252612 PMAQI
28th Jul 2025331 PMAQI
28th Jul 2025262 PMAQI
28th Jul 2025283 PMAQI
28th Jul 2025264 PMAQI
28th Jul 2025275 PMAQI
28th Jul 2025256 PMAQI
28th Jul 2025277 PMAQI
28th Jul 2025268 PMAQI
28th Jul 2025289 PMAQI
28th Jul 20252810 PMAQI
28th Jul 20252911 PMAQI
29th Jul 20252912 AMAQI
29th Jul 2025281 AMAQI
29th Jul 2025252 AMAQI
29th Jul 2025263 AMAQI
29th Jul 2025214 AMAQI
21°C14/29°C
29th Jul 2025165 AMAQI
29th Jul 2025186 AMAQI
29th Jul 2025247 AMAQI
29th Jul 2025278 AMAQI
29th Jul 2025229 AMAQI
29th Jul 20252210 AMAQI
29th Jul 20252611 AMAQI
29th Jul 20252712 PMAQI
29th Jul 2025261 PMAQI
29th Jul 2025302 PMAQI
29th Jul 2025283 PMAQI
29th Jul 2025264 PMAQI
29th Jul 2025265 PMAQI
29th Jul 2025286 PMAQI
29th Jul 2025277 PMAQI
29th Jul 2025278 PMAQI
29th Jul 2025289 PMAQI
29th Jul 20253010 PMAQI
29th Jul 20252811 PMAQI
30th Jul 20252912 AMAQI
30th Jul 2025281 AMAQI
30th Jul 2025252 AMAQI
30th Jul 2025203 AMAQI
30th Jul 2025204 AMAQI
22°C15/31°C
30th Jul 2025265 AMAQI
30th Jul 2025246 AMAQI
30th Jul 2025247 AMAQI
30th Jul 2025228 AMAQI
30th Jul 2025229 AMAQI
30th Jul 20251910 AMAQI
30th Jul 20252011 AMAQI
30th Jul 20252212 PMAQI
30th Jul 2025271 PMAQI
30th Jul 2025342 PMAQI
30th Jul 2025333 PMAQI
30th Jul 2025334 PMAQI
30th Jul 2025335 PMAQI
30th Jul 2025336 PMAQI
30th Jul 2025337 PMAQI
30th Jul 2025338 PMAQI
30th Jul 2025289 PMAQI
30th Jul 20252810 PMAQI
30th Jul 20253011 PMAQI
31st Jul 20252612 AMAQI
31st Jul 2025231 AMAQI
31st Jul 2025222 AMAQI
31st Jul 2025223 AMAQI
31st Jul 2025164 AMAQI
23°C16/32°C
31st Jul 2025155 AMAQI
31st Jul 2025196 AMAQI
31st Jul 2025227 AMAQI
31st Jul 2025228 AMAQI
31st Jul 2025249 AMAQI
31st Jul 20252810 AMAQI
31st Jul 20252011 AMAQI
31st Jul 20252012 PMAQI
31st Jul 2025181 PMAQI
31st Jul 2025192 PMAQI
31st Jul 2025233 PMAQI
31st Jul 2025254 PMAQI
31st Jul 2025295 PMAQI
31st Jul 2025296 PMAQI
31st Jul 2025227 PMAQI
31st Jul 2025328 PMAQI
31st Jul 2025449 PMAQI
31st Jul 20254610 PMAQI
31st Jul 20254211 PMAQI
1st Aug 20253712 AMAQI
1st Aug 2025321 AMAQI
1st Aug 2025272 AMAQI
1st Aug 2025283 AMAQI
1st Aug 2025314 AMAQI
23°C18/31°C
1st Aug 2025285 AMAQI
1st Aug 2025236 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025178 AMAQI
1st Aug 2025189 AMAQI
1st Aug 20251910 AMAQI
1st Aug 20252111 AMAQI
1st Aug 20252212 PMAQI
1st Aug 2025211 PMAQI
1st Aug 2025232 PMAQI
1st Aug 2025213 PMAQI
1st Aug 2025204 PMAQI
1st Aug 2025235 PMAQI
1st Aug 2025326 PMAQI
1st Aug 2025277 PMAQI
1st Aug 2025298 PMAQI
1st Aug 2025289 PMAQI
1st Aug 20253010 PMAQI
1st Aug 20253211 PMAQI
2nd Aug 20253512 AMAQI
2nd Aug 2025361 AMAQI
2nd Aug 2025322 AMAQI
2nd Aug 2025323 AMAQI
2nd Aug 2025324 AMAQI
22°C17/27°C
2nd Aug 2025285 AMAQI
2nd Aug 2025266 AMAQI
2nd Aug 2025277 AMAQI
2nd Aug 2025228 AMAQI
2nd Aug 2025179 AMAQI
2nd Aug 20251710 AMAQI
2nd Aug 20251811 AMAQI
2nd Aug 20251312 PMAQI
2nd Aug 2025121 PMAQI
2nd Aug 2025172 PMAQI
2nd Aug 2025203 PMAQI
2nd Aug 2025194 PMAQI
2nd Aug 2025225 PMAQI
2nd Aug 2025226 PMAQI
2nd Aug 2025247 PMAQI
2nd Aug 2025308 PMAQI
2nd Aug 2025419 PMAQI
2nd Aug 20254410 PMAQI
2nd Aug 20255011 PMAQI
3rd Aug 20254112 AMAQI
3rd Aug 2025321 AMAQI
3rd Aug 2025342 AMAQI
3rd Aug 2025343 AMAQI
3rd Aug 2025304 AMAQI
19°C16/21°C
3rd Aug 2025245 AMAQI
3rd Aug 2025236 AMAQI
3rd Aug 2025257 AMAQI
3rd Aug 2025288 AMAQI
3rd Aug 2025229 AMAQI
3rd Aug 20252210 AMAQI
3rd Aug 20252211 AMAQI
3rd Aug 20252012 PMAQI
3rd Aug 2025201 PMAQI
3rd Aug 2025222 PMAQI
3rd Aug 2025213 PMAQI
3rd Aug 2025204 PMAQI
3rd Aug 2025245 PMAQI
3rd Aug 2025306 PMAQI
3rd Aug 2025287 PMAQI
3rd Aug 2025308 PMAQI
3rd Aug 2025329 PMAQI
3rd Aug 20253210 PMAQI
3rd Aug 20254211 PMAQI
4th Aug 20254812 AMAQI
4th Aug 2025501 AMAQI
4th Aug 2025542 AMAQI
4th Aug 2025533 AMAQI
4th Aug 2025534 AMAQI
18°C16/20°C
4th Aug 2025455 AMAQI
4th Aug 2025376 AMAQI
4th Aug 2025367 AMAQI
4th Aug 2025378 AMAQI
4th Aug 2025409 AMAQI
4th Aug 20253810 AMAQI
4th Aug 20253411 AMAQI
4th Aug 20253512 PMAQI
4th Aug 2025361 PMAQI
4th Aug 2025402 PMAQI
4th Aug 2025453 PMAQI
4th Aug 2025564 PMAQI
4th Aug 2025625 PMAQI
4th Aug 2025706 PMAQI
4th Aug 2025447 PMAQI
4th Aug 2025548 PMAQI
4th Aug 2025629 PMAQI
4th Aug 20256010 PMAQI
4th Aug 20255711 PMAQI
5th Aug 20255212 AMAQI
5th Aug 2025461 AMAQI
5th Aug 2025442 AMAQI
5th Aug 2025433 AMAQI
5th Aug 2025394 AMAQI
18°C16/21°C
5th Aug 2025345 AMAQI
5th Aug 2025276 AMAQI
5th Aug 2025317 AMAQI
5th Aug 2025378 AMAQI
5th Aug 2025389 AMAQI
5th Aug 20253410 AMAQI
5th Aug 20253211 AMAQI
5th Aug 20252912 PMAQI
5th Aug 2025311 PMAQI
5th Aug 2025342 PMAQI
5th Aug 2025323 PMAQI
5th Aug 2025334 PMAQI
5th Aug 2025315 PMAQI
5th Aug 2025306 PMAQI
5th Aug 2025357 PMAQI
5th Aug 2025288 PMAQI
5th Aug 2025259 PMAQI
5th Aug 20252610 PMAQI
5th Aug 20252611 PMAQI
6th Aug 20252212 AMAQI
6th Aug 2025191 AMAQI
6th Aug 2025192 AMAQI
20°C16/24°C
5 AM
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
11 AM - 6 PM
27AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
5 AM - 10 AM
25AQI
6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 6 PM (Avg. 27), while the lowest AQI was between 5 AM to 10 AM (Avg. 25).
Night time
Avg. Highest Time
9 PM - 11 PM
30AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
4 AM
26AQI
1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 30), while the lowest AQI was between 4 AM to 4 AM (Avg. 26).
2025 Days Vs Air Quality
Mercer Island, Washington, United States
2025
98%
212
2%
4
Total number of days with different AQI categories in last 218 days in 2025 (147 days remaining)
Good
212 DaysModerate
4 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 218 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
Mercer Island, 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
30AQI
30AQI
2nd January 2025
28AQI
28AQI
3rd January 2025
22AQI
22AQI
4th January 2025
23AQI
23AQI
5th January 2025
21AQI
21AQI
6th January 2025
22AQI
22AQI
7th January 2025
36AQI
36AQI
8th January 2025
33AQI
33AQI
9th January 2025
43AQI
43AQI
10th January 2025
32AQI
32AQI
11th January 2025
30AQI
30AQI
12th January 2025
47AQI
47AQI
13th January 2025
40AQI
40AQI
14th January 2025
38AQI
38AQI
15th January 2025
42AQI
42AQI
16th January 2025
37AQI
37AQI
17th January 2025
31AQI
31AQI
18th January 2025
32AQI
32AQI
19th January 2025
38AQI
38AQI
20th January 2025
37AQI
37AQI
21st January 2025
52AQI
52AQI
22nd January 2025
45AQI
45AQI
23rd January 2025
51AQI
51AQI
24th January 2025
39AQI
39AQI
25th January 2025
32AQI
32AQI
26th January 2025
44AQI
44AQI
27th January 2025
45AQI
45AQI
28th January 2025
50AQI
50AQI
29th January 2025
57AQI
57AQI
30th January 2025
49AQI
49AQI
31st January 2025
28AQI
28AQI
1st February 2025
21AQI
21AQI
2nd February 2025
21AQI
21AQI
3rd February 2025
22AQI
22AQI
4th February 2025
22AQI
22AQI
5th February 2025
21AQI
21AQI
6th February 2025
21AQI
21AQI
7th February 2025
22AQI
22AQI
8th February 2025
24AQI
24AQI
9th February 2025
31AQI
31AQI
10th February 2025
28AQI
28AQI
11th February 2025
26AQI
26AQI
12th February 2025
29AQI
29AQI
13th February 2025
31AQI
31AQI
14th February 2025
33AQI
33AQI
15th February 2025
34AQI
34AQI
16th February 2025
28AQI
28AQI
17th February 2025
29AQI
29AQI
18th February 2025
26AQI
26AQI
19th February 2025
24AQI
24AQI
20th February 2025
23AQI
23AQI
21st February 2025
26AQI
26AQI
22nd February 2025
23AQI
23AQI
23rd February 2025
22AQI
22AQI
24th February 2025
26AQI
26AQI
25th February 2025
24AQI
24AQI
26th February 2025
27AQI
27AQI
27th February 2025
26AQI
26AQI
28th February 2025
37AQI
37AQI
1st March 2025
38AQI
38AQI
2nd March 2025
31AQI
31AQI
3rd March 2025
29AQI
29AQI
4th March 2025
26AQI
26AQI
5th March 2025
27AQI
27AQI
6th March 2025
26AQI
26AQI
7th March 2025
28AQI
28AQI
8th March 2025
27AQI
27AQI
9th March 2025
26AQI
26AQI
10th March 2025
24AQI
24AQI
11th March 2025
25AQI
25AQI
12th March 2025
24AQI
24AQI
13th March 2025
21AQI
21AQI
14th March 2025
22AQI
22AQI
15th March 2025
21AQI
21AQI
16th March 2025
21AQI
21AQI
17th March 2025
22AQI
22AQI
18th March 2025
20AQI
20AQI
19th March 2025
20AQI
20AQI
20th March 2025
18AQI
18AQI
21st March 2025
21AQI
21AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
22AQI
22AQI
24th March 2025
21AQI
21AQI
25th March 2025
25AQI
25AQI
26th March 2025
28AQI
28AQI
27th March 2025
19AQI
19AQI
28th March 2025
17AQI
17AQI
29th March 2025
17AQI
17AQI
30th March 2025
20AQI
20AQI
31st March 2025
18AQI
18AQI
1st April 2025
19AQI
19AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
21AQI
21AQI
4th April 2025
25AQI
25AQI
5th April 2025
33AQI
33AQI
6th April 2025
23AQI
23AQI
7th April 2025
13AQI
13AQI
8th April 2025
13AQI
13AQI
9th April 2025
14AQI
14AQI
10th April 2025
24AQI
24AQI
11th April 2025
16AQI
16AQI
12th April 2025
16AQI
16AQI
13th April 2025
16AQI
16AQI
14th April 2025
19AQI
19AQI
15th April 2025
19AQI
19AQI
16th April 2025
20AQI
20AQI
17th April 2025
19AQI
19AQI
18th April 2025
20AQI
20AQI
19th April 2025
24AQI
24AQI
20th April 2025
19AQI
19AQI
21st April 2025
17AQI
17AQI
22nd April 2025
16AQI
16AQI
23rd April 2025
24AQI
24AQI
24th April 2025
27AQI
27AQI
25th April 2025
38AQI
38AQI
26th April 2025
39AQI
39AQI
27th April 2025
30AQI
30AQI
28th April 2025
17AQI
17AQI
29th April 2025
15AQI
15AQI
30th April 2025
20AQI
20AQI
1st May 2025
24AQI
24AQI
2nd May 2025
30AQI
30AQI
3rd May 2025
17AQI
17AQI
4th May 2025
18AQI
18AQI
5th May 2025
18AQI
18AQI
6th May 2025
23AQI
23AQI
7th May 2025
21AQI
21AQI
8th May 2025
20AQI
20AQI
9th May 2025
20AQI
20AQI
10th May 2025
21AQI
21AQI
11th May 2025
19AQI
19AQI
12th May 2025
17AQI
17AQI
13th May 2025
19AQI
19AQI
14th May 2025
24AQI
24AQI
15th May 2025
22AQI
22AQI
16th May 2025
16AQI
16AQI
17th May 2025
19AQI
19AQI
18th May 2025
16AQI
16AQI
19th May 2025
17AQI
17AQI
20th May 2025
14AQI
14AQI
21st May 2025
15AQI
15AQI
22nd May 2025
18AQI
18AQI
23rd May 2025
19AQI
19AQI
24th May 2025
19AQI
19AQI
25th May 2025
20AQI
20AQI
26th May 2025
17AQI
17AQI
27th May 2025
20AQI
20AQI
28th May 2025
27AQI
27AQI
29th May 2025
17AQI
17AQI
30th May 2025
23AQI
23AQI
31st May 2025
20AQI
20AQI
1st June 2025
21AQI
21AQI
2nd June 2025
23AQI
23AQI
3rd June 2025
22AQI
22AQI
4th June 2025
20AQI
20AQI
5th June 2025
21AQI
21AQI
6th June 2025
25AQI
25AQI
7th June 2025
30AQI
30AQI
8th June 2025
34AQI
34AQI
9th June 2025
35AQI
35AQI
10th June 2025
41AQI
41AQI
11th June 2025
44AQI
44AQI
12th June 2025
39AQI
39AQI
13th June 2025
29AQI
29AQI
14th June 2025
22AQI
22AQI
15th June 2025
22AQI
22AQI
16th June 2025
25AQI
25AQI
17th June 2025
20AQI
20AQI
18th June 2025
16AQI
16AQI
19th June 2025
17AQI
17AQI
20th June 2025
16AQI
16AQI
21st June 2025
14AQI
14AQI
22nd June 2025
15AQI
15AQI
23rd June 2025
21AQI
21AQI
24th June 2025
35AQI
35AQI
25th June 2025
28AQI
28AQI
26th June 2025
19AQI
19AQI
27th June 2025
16AQI
16AQI
28th June 2025
25AQI
25AQI
29th June 2025
25AQI
25AQI
30th June 2025
24AQI
24AQI
1st July 2025
24AQI
24AQI
2nd July 2025
16AQI
16AQI
3rd July 2025
17AQI
17AQI
4th July 2025
20AQI
20AQI
5th July 2025
67AQI
67AQI
6th July 2025
27AQI
27AQI
7th July 2025
23AQI
23AQI
8th July 2025
28AQI
28AQI
9th July 2025
17AQI
17AQI
10th July 2025
17AQI
17AQI
11th July 2025
25AQI
25AQI
12th July 2025
20AQI
20AQI
13th July 2025
27AQI
27AQI
14th July 2025
20AQI
20AQI
15th July 2025
26AQI
26AQI
16th July 2025
35AQI
35AQI
17th July 2025
41AQI
41AQI
18th July 2025
39AQI
39AQI
19th July 2025
27AQI
27AQI
20th July 2025
23AQI
23AQI
21st July 2025
30AQI
30AQI
22nd July 2025
22AQI
22AQI
23rd July 2025
34AQI
34AQI
24th July 2025
23AQI
23AQI
25th July 2025
19AQI
19AQI
26th July 2025
23AQI
23AQI
27th July 2025
28AQI
28AQI
28th July 2025
26AQI
26AQI
29th July 2025
26AQI
26AQI
30th July 2025
27AQI
27AQI
31st July 2025
26AQI
26AQI
1st August 2025
27AQI
27AQI
2nd August 2025
28AQI
28AQI
3rd August 2025
28AQI
28AQI
4th August 2025
47AQI
47AQI
37AQI
26AQI
23AQI
21AQI
20AQI
25AQI
27AQI
33AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202526AQI
28
3
28
31
30
31
30
30
1
4
212
4
Highest AQI recorded in
January37AQI
Lowest AQI recorded in
May20AQI
202428AQI
29
2
29
29
2
30
31
30
29
2
31
27
3
31
27
3
30
1
353
13
Highest AQI recorded in
March32AQI
Lowest AQI recorded in
January25AQI
202330AQI
31
28
31
30
31
30
29
1
1
25
6
29
1
31
24
5
31
350
13
1
Highest AQI recorded in
August41AQI
Lowest AQI recorded in
December23AQI
202232AQI
31
22
31
30
31
30
22
1
1
22
6
1
15
12
2
2
27
3
31
293
22
3
2
Highest AQI recorded in
October63AQI
Lowest AQI recorded in
June24AQI
202126AQI
29
1
28
31
30
31
27
2
31
29
1
1
30
31
30
31
358
4
1
Highest AQI recorded in
April32AQI
Lowest AQI recorded in
December23AQI
202029AQI
20
18
30
31
31
19
2
2
4
3
30
30
29
2
238
4
2
4
3
Highest AQI recorded in
September72AQI
Lowest AQI recorded in
June19AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2022(Avg.)
32AQILeast Polluted Year Recorded
2025(Avg.)
26AQIMercer Island's annual 2025 AQI (26) shows an average percentage change of -11.3% (improved AQI) compared to previous years: 2020 (29), 2021 (26), 2022 (32), 2023 (30), 2024 (28).
