Portland Postal Bldg., Portland, Oregon, 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
Portland Postal Bldg., Portland, Oregon, United States
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
31st Aug 2024
47AQILowest AQI recorded on
31st Aug 2023
12AQISame Day Analysis (10th August ):
On this day, AQI across the 3 years varied significantly: 2025 ranks 2nd highest AQI at 25 of Good air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 10th Aug - 11th Aug 2025
Portland Postal Bldg., Portland, Oregon, United States
AQI
Day
Night
.
5 AM10th Aug 2025
8 PM
4 AM11th Aug 2025
Day time
Avg. Highest Time
6AM10th Aug
32AQI
Avg. Lowest Time
7AM10th Aug
20AQI
Night time
Avg. Highest Time
9PM10th Aug
28AQI
Avg. Lowest Time
1AM11th Aug
23AQI
In the last 24 hours,
Portland Postal Bldg.'s AQI reached its highest point of 32 at 6 AM during the Day, while the lowest point, 20, was recorded at 7 AM during the Day between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Portland Postal Bldg., Portland, Oregon, United States
JulAug
12th - 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 - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th
Day
Night
12th Jul 2025185 AMAQI
12th Jul 2025156 AMAQI
12th Jul 2025167 AMAQI
12th Jul 2025178 AMAQI
12th Jul 2025189 AMAQI
12th Jul 20251710 AMAQI
12th Jul 20251711 AMAQI
12th Jul 20251612 PMAQI
12th Jul 2025181 PMAQI
12th Jul 2025172 PMAQI
12th Jul 2025183 PMAQI
12th Jul 2025184 PMAQI
12th Jul 2025195 PMAQI
12th Jul 2025186 PMAQI
12th Jul 2025187 PMAQI
12th Jul 2025198 PMAQI
12th Jul 2025189 PMAQI
12th Jul 20251910 PMAQI
12th Jul 20251911 PMAQI
13th Jul 20252012 AMAQI
13th Jul 2025211 AMAQI
13th Jul 2025222 AMAQI
13th Jul 2025213 AMAQI
13th Jul 2025244 AMAQI
24°C18/33°C
13th Jul 2025235 AMAQI
13th Jul 2025226 AMAQI
13th Jul 2025217 AMAQI
13th Jul 2025218 AMAQI
13th Jul 2025199 AMAQI
13th Jul 20251910 AMAQI
13th Jul 20252011 AMAQI
13th Jul 20252412 PMAQI
13th Jul 2025261 PMAQI
13th Jul 2025252 PMAQI
13th Jul 2025233 PMAQI
13th Jul 2025224 PMAQI
13th Jul 2025225 PMAQI
13th Jul 2025226 PMAQI
13th Jul 2025227 PMAQI
13th Jul 2025228 PMAQI
13th Jul 2025209 PMAQI
13th Jul 20252010 PMAQI
13th Jul 20252011 PMAQI
14th Jul 20252012 AMAQI
14th Jul 2025181 AMAQI
14th Jul 2025172 AMAQI
14th Jul 2025163 AMAQI
14th Jul 2025154 AMAQI
27°C19/36°C
14th Jul 2025155 AMAQI
14th Jul 2025156 AMAQI
14th Jul 2025167 AMAQI
14th Jul 2025168 AMAQI
14th Jul 2025159 AMAQI
14th Jul 20251410 AMAQI
14th Jul 20251411 AMAQI
14th Jul 20251612 PMAQI
14th Jul 2025211 PMAQI
14th Jul 2025192 PMAQI
14th Jul 2025163 PMAQI
14th Jul 2025144 PMAQI
14th Jul 2025155 PMAQI
14th Jul 2025156 PMAQI
14th Jul 2025177 PMAQI
14th Jul 2025188 PMAQI
14th Jul 2025189 PMAQI
14th Jul 20251810 PMAQI
14th Jul 20251811 PMAQI
15th Jul 20252012 AMAQI
15th Jul 2025211 AMAQI
15th Jul 2025182 AMAQI
15th Jul 2025183 AMAQI
15th Jul 2025204 AMAQI
21°C16/29°C
15th Jul 2025165 AMAQI
15th Jul 2025226 AMAQI
15th Jul 2025217 AMAQI
15th Jul 2025188 AMAQI
15th Jul 2025179 AMAQI
15th Jul 20252210 AMAQI
15th Jul 20252211 AMAQI
15th Jul 20252812 PMAQI
15th Jul 2025261 PMAQI
15th Jul 2025322 PMAQI
15th Jul 2025223 PMAQI
15th Jul 2025234 PMAQI
15th Jul 2025245 PMAQI
15th Jul 2025236 PMAQI
15th Jul 2025227 PMAQI
15th Jul 2025238 PMAQI
15th Jul 2025239 PMAQI
15th Jul 20252410 PMAQI
15th Jul 20252411 PMAQI
16th Jul 20252412 AMAQI
16th Jul 2025221 AMAQI
16th Jul 2025222 AMAQI
16th Jul 2025233 AMAQI
16th Jul 2025244 AMAQI
24°C15/35°C
16th Jul 2025245 AMAQI
16th Jul 2025276 AMAQI
16th Jul 2025247 AMAQI
16th Jul 2025248 AMAQI
16th Jul 2025209 AMAQI
16th Jul 20251910 AMAQI
16th Jul 20252511 AMAQI
16th Jul 20253012 PMAQI
16th Jul 2025281 PMAQI
16th Jul 2025282 PMAQI
16th Jul 2025263 PMAQI
16th Jul 2025274 PMAQI
16th Jul 2025265 PMAQI
16th Jul 2025266 PMAQI
16th Jul 2025257 PMAQI
16th Jul 2025248 PMAQI
16th Jul 2025249 PMAQI
16th Jul 20252410 PMAQI
16th Jul 20252511 PMAQI
17th Jul 20252412 AMAQI
17th Jul 2025241 AMAQI
17th Jul 2025242 AMAQI
17th Jul 2025263 AMAQI
17th Jul 2025334 AMAQI
29°C22/37°C
17th Jul 2025385 AMAQI
17th Jul 2025416 AMAQI
17th Jul 2025377 AMAQI
17th Jul 2025388 AMAQI
17th Jul 2025339 AMAQI
17th Jul 20252910 AMAQI
17th Jul 20253211 AMAQI
17th Jul 20253212 PMAQI
17th Jul 2025371 PMAQI
17th Jul 2025402 PMAQI
17th Jul 2025343 PMAQI
17th Jul 2025324 PMAQI
17th Jul 2025335 PMAQI
17th Jul 2025356 PMAQI
17th Jul 2025347 PMAQI
17th Jul 2025348 PMAQI
17th Jul 2025329 PMAQI
17th Jul 20253010 PMAQI
17th Jul 20253011 PMAQI
18th Jul 20252812 AMAQI
18th Jul 2025311 AMAQI
18th Jul 2025342 AMAQI
18th Jul 2025333 AMAQI
18th Jul 2025294 AMAQI
24°C16/32°C
18th Jul 2025385 AMAQI
18th Jul 2025416 AMAQI
18th Jul 2025347 AMAQI
18th Jul 2025418 AMAQI
18th Jul 2025369 AMAQI
18th Jul 20253010 AMAQI
18th Jul 20253411 AMAQI
18th Jul 20254312 PMAQI
18th Jul 2025421 PMAQI
18th Jul 2025362 PMAQI
18th Jul 2025353 PMAQI
18th Jul 2025354 PMAQI
18th Jul 2025345 PMAQI
18th Jul 2025356 PMAQI
18th Jul 2025347 PMAQI
18th Jul 2025358 PMAQI
18th Jul 2025329 PMAQI
18th Jul 20253110 PMAQI
18th Jul 20253311 PMAQI
19th Jul 20253012 AMAQI
19th Jul 2025301 AMAQI
19th Jul 2025312 AMAQI
19th Jul 2025293 AMAQI
19th Jul 2025154 AMAQI
22°C17/29°C
19th Jul 2025245 AMAQI
19th Jul 2025216 AMAQI
19th Jul 2025227 AMAQI
19th Jul 2025278 AMAQI
19th Jul 2025219 AMAQI
19th Jul 20252010 AMAQI
19th Jul 20252311 AMAQI
19th Jul 20251912 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025272 PMAQI
19th Jul 2025253 PMAQI
19th Jul 2025244 PMAQI
19th Jul 2025255 PMAQI
19th Jul 2025256 PMAQI
19th Jul 2025237 PMAQI
19th Jul 2025238 PMAQI
19th Jul 2025249 PMAQI
19th Jul 20252410 PMAQI
19th Jul 20252411 PMAQI
20th Jul 20252412 AMAQI
20th Jul 2025241 AMAQI
20th Jul 2025232 AMAQI
20th Jul 2025233 AMAQI
20th Jul 2025224 AMAQI
19°C15/25°C
20th Jul 2025185 AMAQI
20th Jul 2025176 AMAQI
20th Jul 2025267 AMAQI
20th Jul 2025228 AMAQI
20th Jul 2025209 AMAQI
20th Jul 20251710 AMAQI
20th Jul 20252111 AMAQI
20th Jul 20251812 PMAQI
20th Jul 2025191 PMAQI
20th Jul 2025202 PMAQI
20th Jul 2025223 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025226 PMAQI
20th Jul 2025217 PMAQI
20th Jul 2025208 PMAQI
20th Jul 2025229 PMAQI
20th Jul 20252110 PMAQI
20th Jul 20252111 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025221 AMAQI
21st Jul 2025232 AMAQI
21st Jul 2025263 AMAQI
21st Jul 2025304 AMAQI
18°C14/22°C
21st Jul 2025185 AMAQI
21st Jul 2025186 AMAQI
21st Jul 2025207 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025209 AMAQI
21st Jul 20252110 AMAQI
21st Jul 20252011 AMAQI
21st Jul 20252012 PMAQI
21st Jul 2025201 PMAQI
21st Jul 2025222 PMAQI
21st Jul 2025223 PMAQI
21st Jul 2025234 PMAQI
21st Jul 2025225 PMAQI
21st Jul 2025246 PMAQI
21st Jul 2025237 PMAQI
21st Jul 2025228 PMAQI
21st Jul 2025229 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252211 PMAQI
22nd Jul 20252212 AMAQI
22nd Jul 2025231 AMAQI
22nd Jul 2025222 AMAQI
22nd Jul 2025203 AMAQI
22nd Jul 2025184 AMAQI
20°C16/23°C
22nd Jul 2025205 AMAQI
22nd Jul 2025246 AMAQI
22nd Jul 2025227 AMAQI
22nd Jul 2025258 AMAQI
22nd Jul 2025269 AMAQI
22nd Jul 20252710 AMAQI
22nd Jul 20252711 AMAQI
22nd Jul 20252412 PMAQI
22nd Jul 2025191 PMAQI
22nd Jul 2025232 PMAQI
22nd Jul 2025233 PMAQI
22nd Jul 2025264 PMAQI
22nd Jul 2025245 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025227 PMAQI
22nd Jul 2025228 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252211 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025211 AMAQI
23rd Jul 2025212 AMAQI
23rd Jul 2025203 AMAQI
23rd Jul 2025174 AMAQI
22°C15/30°C
23rd Jul 2025265 AMAQI
23rd Jul 2025146 AMAQI
23rd Jul 2025167 AMAQI
23rd Jul 2025178 AMAQI
23rd Jul 2025189 AMAQI
23rd Jul 20251910 AMAQI
23rd Jul 20252011 AMAQI
23rd Jul 20252312 PMAQI
23rd Jul 2025271 PMAQI
23rd Jul 2025242 PMAQI
23rd Jul 2025243 PMAQI
23rd Jul 2025244 PMAQI
23rd Jul 2025255 PMAQI
23rd Jul 2025246 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025229 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252111 PMAQI
24th Jul 20252012 AMAQI
24th Jul 2025201 AMAQI
24th Jul 2025202 AMAQI
24th Jul 2025193 AMAQI
24th Jul 2025164 AMAQI
24°C17/34°C
24th Jul 2025165 AMAQI
24th Jul 2025216 AMAQI
24th Jul 2025187 AMAQI
24th Jul 2025178 AMAQI
24th Jul 2025169 AMAQI
24th Jul 20251510 AMAQI
24th Jul 20251611 AMAQI
24th Jul 20251712 PMAQI
24th Jul 2025201 PMAQI
24th Jul 2025232 PMAQI
24th Jul 2025203 PMAQI
24th Jul 2025214 PMAQI
24th Jul 2025225 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025207 PMAQI
24th Jul 2025218 PMAQI
24th Jul 2025239 PMAQI
24th Jul 20252210 PMAQI
24th Jul 20252011 PMAQI
25th Jul 20251912 AMAQI
25th Jul 2025191 AMAQI
25th Jul 2025182 AMAQI
25th Jul 2025193 AMAQI
25th Jul 2025274 AMAQI
23°C17/31°C
25th Jul 2025265 AMAQI
25th Jul 2025226 AMAQI
25th Jul 2025217 AMAQI
25th Jul 2025188 AMAQI
25th Jul 2025189 AMAQI
25th Jul 20251610 AMAQI
25th Jul 20251611 AMAQI
25th Jul 20251612 PMAQI
25th Jul 2025181 PMAQI
25th Jul 2025222 PMAQI
25th Jul 2025203 PMAQI
25th Jul 2025204 PMAQI
25th Jul 2025205 PMAQI
25th Jul 2025206 PMAQI
25th Jul 2025197 PMAQI
25th Jul 2025208 PMAQI
25th Jul 2025219 PMAQI
25th Jul 20252210 PMAQI
25th Jul 20252111 PMAQI
26th Jul 20251912 AMAQI
26th Jul 2025181 AMAQI
26th Jul 2025182 AMAQI
26th Jul 2025183 AMAQI
26th Jul 2025164 AMAQI
19°C15/24°C
26th Jul 2025175 AMAQI
26th Jul 2025206 AMAQI
26th Jul 2025177 AMAQI
26th Jul 2025168 AMAQI
26th Jul 2025159 AMAQI
26th Jul 20251510 AMAQI
26th Jul 20251511 AMAQI
26th Jul 20251612 PMAQI
26th Jul 2025191 PMAQI
26th Jul 2025162 PMAQI
26th Jul 2025183 PMAQI
26th Jul 2025184 PMAQI
26th Jul 2025185 PMAQI
26th Jul 2025176 PMAQI
26th Jul 2025187 PMAQI
26th Jul 2025188 PMAQI
26th Jul 2025189 PMAQI
26th Jul 20251810 PMAQI
26th Jul 20251911 PMAQI
27th Jul 20251912 AMAQI
27th Jul 2025181 AMAQI
27th Jul 2025192 AMAQI
27th Jul 2025183 AMAQI
27th Jul 2025214 AMAQI
17°C14/21°C
27th Jul 2025265 AMAQI
27th Jul 2025266 AMAQI
27th Jul 2025227 AMAQI
27th Jul 2025208 AMAQI
27th Jul 2025209 AMAQI
27th Jul 20251910 AMAQI
27th Jul 20251911 AMAQI
27th Jul 20252212 PMAQI
27th Jul 2025311 PMAQI
27th Jul 2025282 PMAQI
27th Jul 2025243 PMAQI
27th Jul 2025254 PMAQI
27th Jul 2025225 PMAQI
27th Jul 2025216 PMAQI
27th Jul 2025227 PMAQI
27th Jul 2025228 PMAQI
27th Jul 2025229 PMAQI
27th Jul 20252010 PMAQI
27th Jul 20252111 PMAQI
28th Jul 20252112 AMAQI
28th Jul 2025221 AMAQI
28th Jul 2025222 AMAQI
28th Jul 2025203 AMAQI
28th Jul 2025184 AMAQI
20°C15/28°C
28th Jul 2025215 AMAQI
28th Jul 2025226 AMAQI
28th Jul 2025197 AMAQI
28th Jul 2025198 AMAQI
28th Jul 2025209 AMAQI
28th Jul 20251810 AMAQI
28th Jul 20252011 AMAQI
28th Jul 20252312 PMAQI
28th Jul 2025221 PMAQI
28th Jul 2025242 PMAQI
28th Jul 2025223 PMAQI
28th Jul 2025234 PMAQI
28th Jul 2025225 PMAQI
28th Jul 2025226 PMAQI
28th Jul 2025227 PMAQI
28th Jul 2025228 PMAQI
28th Jul 2025239 PMAQI
28th Jul 20252310 PMAQI
28th Jul 20252211 PMAQI
29th Jul 20252012 AMAQI
29th Jul 2025211 AMAQI
29th Jul 2025202 AMAQI
29th Jul 2025183 AMAQI
29th Jul 2025164 AMAQI
22°C15/31°C
29th Jul 2025165 AMAQI
29th Jul 2025206 AMAQI
29th Jul 2025177 AMAQI
29th Jul 2025178 AMAQI
29th Jul 2025179 AMAQI
29th Jul 20251710 AMAQI
29th Jul 20252011 AMAQI
29th Jul 20252212 PMAQI
29th Jul 2025181 PMAQI
29th Jul 2025222 PMAQI
29th Jul 2025193 PMAQI
29th Jul 2025204 PMAQI
29th Jul 2025215 PMAQI
29th Jul 2025216 PMAQI
29th Jul 2025207 PMAQI
29th Jul 2025208 PMAQI
29th Jul 2025219 PMAQI
29th Jul 20252110 PMAQI
29th Jul 20252111 PMAQI
30th Jul 20252212 AMAQI
30th Jul 2025221 AMAQI
30th Jul 2025222 AMAQI
30th Jul 2025223 AMAQI
30th Jul 2025204 AMAQI
25°C17/35°C
30th Jul 2025235 AMAQI
30th Jul 2025216 AMAQI
30th Jul 2025247 AMAQI
30th Jul 2025188 AMAQI
30th Jul 2025189 AMAQI
30th Jul 20251810 AMAQI
30th Jul 20251811 AMAQI
30th Jul 20251912 PMAQI
30th Jul 2025201 PMAQI
30th Jul 2025312 PMAQI
30th Jul 2025313 PMAQI
30th Jul 2025314 PMAQI
30th Jul 2025315 PMAQI
30th Jul 2025316 PMAQI
30th Jul 2025317 PMAQI
30th Jul 2025318 PMAQI
30th Jul 2025269 PMAQI
30th Jul 20252410 PMAQI
30th Jul 20252211 PMAQI
31st Jul 20252312 AMAQI
31st Jul 2025211 AMAQI
31st Jul 2025222 AMAQI
31st Jul 2025193 AMAQI
31st Jul 2025184 AMAQI
24°C18/32°C
31st Jul 2025175 AMAQI
31st Jul 2025196 AMAQI
31st Jul 2025227 AMAQI
31st Jul 2025228 AMAQI
31st Jul 2025199 AMAQI
31st Jul 20252210 AMAQI
31st Jul 20252711 AMAQI
31st Jul 20253012 PMAQI
31st Jul 2025301 PMAQI
31st Jul 2025252 PMAQI
31st Jul 2025223 PMAQI
31st Jul 2025234 PMAQI
31st Jul 2025225 PMAQI
31st Jul 2025206 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025258 PMAQI
31st Jul 2025219 PMAQI
31st Jul 20252110 PMAQI
31st Jul 20252211 PMAQI
1st Aug 20251912 AMAQI
1st Aug 2025181 AMAQI
1st Aug 2025182 AMAQI
1st Aug 2025213 AMAQI
1st Aug 2025204 AMAQI
22°C17/30°C
1st Aug 2025185 AMAQI
1st Aug 2025186 AMAQI
1st Aug 2025177 AMAQI
1st Aug 2025168 AMAQI
1st Aug 2025149 AMAQI
1st Aug 20251510 AMAQI
1st Aug 20251611 AMAQI
1st Aug 20251612 PMAQI
1st Aug 2025171 PMAQI
1st Aug 2025182 PMAQI
1st Aug 2025203 PMAQI
1st Aug 2025204 PMAQI
1st Aug 2025205 PMAQI
1st Aug 2025196 PMAQI
1st Aug 2025187 PMAQI
1st Aug 2025188 PMAQI
1st Aug 2025189 PMAQI
1st Aug 20251810 PMAQI
1st Aug 20251911 PMAQI
2nd Aug 20252012 AMAQI
2nd Aug 2025181 AMAQI
2nd Aug 2025172 AMAQI
2nd Aug 2025183 AMAQI
2nd Aug 2025184 AMAQI
22°C17/30°C
2nd Aug 2025175 AMAQI
2nd Aug 2025166 AMAQI
2nd Aug 2025187 AMAQI
2nd Aug 2025168 AMAQI
2nd Aug 2025159 AMAQI
2nd Aug 20251510 AMAQI
2nd Aug 20251511 AMAQI
2nd Aug 20251412 PMAQI
2nd Aug 2025151 PMAQI
2nd Aug 2025142 PMAQI
2nd Aug 2025143 PMAQI
2nd Aug 2025144 PMAQI
2nd Aug 2025155 PMAQI
2nd Aug 2025146 PMAQI
2nd Aug 2025177 PMAQI
2nd Aug 2025178 PMAQI
2nd Aug 2025179 PMAQI
2nd Aug 20251810 PMAQI
2nd Aug 20252211 PMAQI
3rd Aug 20252412 AMAQI
3rd Aug 2025261 AMAQI
3rd Aug 2025262 AMAQI
3rd Aug 2025243 AMAQI
3rd Aug 2025254 AMAQI
19°C17/22°C
3rd Aug 2025235 AMAQI
3rd Aug 2025226 AMAQI
3rd Aug 2025217 AMAQI
3rd Aug 2025208 AMAQI
3rd Aug 2025189 AMAQI
3rd Aug 20251710 AMAQI
3rd Aug 20251711 AMAQI
3rd Aug 20251612 PMAQI
3rd Aug 2025161 PMAQI
3rd Aug 2025172 PMAQI
3rd Aug 2025163 PMAQI
3rd Aug 2025184 PMAQI
3rd Aug 2025225 PMAQI
3rd Aug 2025226 PMAQI
3rd Aug 2025217 PMAQI
3rd Aug 2025258 PMAQI
3rd Aug 2025279 PMAQI
3rd Aug 20252310 PMAQI
3rd Aug 20252411 PMAQI
4th Aug 20252312 AMAQI
4th Aug 2025241 AMAQI
4th Aug 2025262 AMAQI
4th Aug 2025243 AMAQI
4th Aug 2025224 AMAQI
18°C15/22°C
4th Aug 2025215 AMAQI
4th Aug 2025206 AMAQI
4th Aug 2025217 AMAQI
4th Aug 2025228 AMAQI
4th Aug 2025229 AMAQI
4th Aug 20252010 AMAQI
4th Aug 20252011 AMAQI
4th Aug 20252012 PMAQI
4th Aug 2025251 PMAQI
4th Aug 2025232 PMAQI
4th Aug 2025223 PMAQI
4th Aug 2025254 PMAQI
4th Aug 2025265 PMAQI
4th Aug 2025326 PMAQI
4th Aug 2025207 PMAQI
4th Aug 2025308 PMAQI
4th Aug 2025399 PMAQI
4th Aug 20254410 PMAQI
4th Aug 20255011 PMAQI
5th Aug 20254912 AMAQI
5th Aug 2025441 AMAQI
5th Aug 2025412 AMAQI
5th Aug 2025383 AMAQI
5th Aug 2025384 AMAQI
19°C16/24°C
5th Aug 2025385 AMAQI
5th Aug 2025386 AMAQI
5th Aug 2025347 AMAQI
5th Aug 2025288 AMAQI
5th Aug 2025299 AMAQI
5th Aug 20253410 AMAQI
5th Aug 20253411 AMAQI
5th Aug 20253412 PMAQI
5th Aug 2025381 PMAQI
5th Aug 2025402 PMAQI
5th Aug 2025453 PMAQI
5th Aug 2025474 PMAQI
5th Aug 2025465 PMAQI
5th Aug 2025446 PMAQI
5th Aug 2025407 PMAQI
5th Aug 2025398 PMAQI
5th Aug 2025339 PMAQI
5th Aug 20253110 PMAQI
5th Aug 20253211 PMAQI
6th Aug 20253012 AMAQI
6th Aug 2025251 AMAQI
6th Aug 2025222 AMAQI
6th Aug 2025213 AMAQI
6th Aug 2025214 AMAQI
21°C15/29°C
6th Aug 2025235 AMAQI
6th Aug 2025206 AMAQI
6th Aug 2025187 AMAQI
6th Aug 2025208 AMAQI
6th Aug 2025229 AMAQI
6th Aug 20252010 AMAQI
6th Aug 20252011 AMAQI
6th Aug 20252212 PMAQI
6th Aug 2025241 PMAQI
6th Aug 2025182 PMAQI
6th Aug 2025203 PMAQI
6th Aug 2025184 PMAQI
6th Aug 2025185 PMAQI
6th Aug 2025166 PMAQI
6th Aug 2025227 PMAQI
6th Aug 2025208 PMAQI
6th Aug 2025179 PMAQI
6th Aug 20251610 PMAQI
6th Aug 20252011 PMAQI
7th Aug 20251812 AMAQI
7th Aug 2025211 AMAQI
7th Aug 2025192 AMAQI
7th Aug 2025183 AMAQI
7th Aug 2025144 AMAQI
20°C16/24°C
7th Aug 2025175 AMAQI
7th Aug 2025246 AMAQI
7th Aug 2025187 AMAQI
7th Aug 2025188 AMAQI
7th Aug 2025209 AMAQI
7th Aug 20251610 AMAQI
7th Aug 20251611 AMAQI
7th Aug 20251612 PMAQI
7th Aug 2025171 PMAQI
7th Aug 2025192 PMAQI
7th Aug 2025163 PMAQI
7th Aug 2025184 PMAQI
7th Aug 2025185 PMAQI
7th Aug 2025186 PMAQI
7th Aug 2025167 PMAQI
7th Aug 2025178 PMAQI
7th Aug 2025189 PMAQI
7th Aug 20251810 PMAQI
7th Aug 20252011 PMAQI
8th Aug 20251812 AMAQI
8th Aug 2025181 AMAQI
8th Aug 2025202 AMAQI
8th Aug 2025183 AMAQI
8th Aug 2025174 AMAQI
20°C16/24°C
8th Aug 2025145 AMAQI
8th Aug 2025176 AMAQI
8th Aug 2025187 AMAQI
8th Aug 2025168 AMAQI
8th Aug 2025209 AMAQI
8th Aug 20251610 AMAQI
8th Aug 20251811 AMAQI
8th Aug 20252112 PMAQI
8th Aug 2025211 PMAQI
8th Aug 2025212 PMAQI
8th Aug 2025203 PMAQI
8th Aug 2025204 PMAQI
8th Aug 2025195 PMAQI
8th Aug 2025206 PMAQI
8th Aug 2025207 PMAQI
8th Aug 2025188 PMAQI
8th Aug 2025179 PMAQI
8th Aug 20251910 PMAQI
8th Aug 20252011 PMAQI
9th Aug 20251912 AMAQI
9th Aug 2025191 AMAQI
9th Aug 2025192 AMAQI
9th Aug 2025193 AMAQI
9th Aug 2025204 AMAQI
21°C15/29°C
9th Aug 2025225 AMAQI
9th Aug 2025186 AMAQI
9th Aug 2025227 AMAQI
9th Aug 2025198 AMAQI
9th Aug 2025209 AMAQI
9th Aug 20251610 AMAQI
9th Aug 20252211 AMAQI
9th Aug 20252412 PMAQI
9th Aug 2025201 PMAQI
9th Aug 2025202 PMAQI
9th Aug 2025223 PMAQI
9th Aug 2025214 PMAQI
9th Aug 2025215 PMAQI
9th Aug 2025226 PMAQI
9th Aug 2025227 PMAQI
9th Aug 2025228 PMAQI
9th Aug 2025229 PMAQI
9th Aug 20252210 PMAQI
9th Aug 20252311 PMAQI
10th Aug 20252212 AMAQI
10th Aug 2025231 AMAQI
10th Aug 2025242 AMAQI
10th Aug 2025253 AMAQI
10th Aug 2025244 AMAQI
23°C16/32°C
10th Aug 2025245 AMAQI
10th Aug 2025326 AMAQI
10th Aug 2025207 AMAQI
10th Aug 2025238 AMAQI
10th Aug 2025219 AMAQI
10th Aug 20252310 AMAQI
10th Aug 20252811 AMAQI
10th Aug 20252612 PMAQI
10th Aug 2025251 PMAQI
10th Aug 2025312 PMAQI
10th Aug 2025273 PMAQI
10th Aug 2025284 PMAQI
10th Aug 2025285 PMAQI
10th Aug 2025286 PMAQI
10th Aug 2025277 PMAQI
10th Aug 2025268 PMAQI
10th Aug 2025289 PMAQI
10th Aug 20252610 PMAQI
10th Aug 20252611 PMAQI
11th Aug 20252412 AMAQI
11th Aug 2025231 AMAQI
11th Aug 2025252 AMAQI
11th Aug 2025283 AMAQI
11th Aug 2025264 AMAQI
28°C19/39°C
11th Aug 2025245 AMAQI
5 AM11th Aug 2025266 AMAQI
11th Aug 2025257 AMAQI
11th Aug 2025268 AMAQI
11th Aug 2025259 AMAQI
11th Aug 20252410 AMAQI
11th Aug 20253111 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
1 PM - 8 PM
23AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
5 AM - 12 PM
21AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 8 PM (Avg. 23), while the lowest AQI was between 5 AM to 12 PM (Avg. 21).
Night time
Avg. Highest Time
12 AM - 11 PM
22AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 4 AM
22AQI
5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 22), while the lowest AQI was between 12 AM to 4 AM (Avg. 22).
2025 Days Vs Air Quality
Portland Postal Bldg., Portland, Oregon, United States
2025
95%
211
5%
11
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Good
211 DaysModerate
11 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 95%
Health Risk Level:
Very Low
In 2025, 95% of 223 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
Portland Postal Bldg., Portland, Oregon, 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
32AQI
32AQI
2nd January 2025
22AQI
22AQI
3rd January 2025
29AQI
29AQI
4th January 2025
24AQI
24AQI
5th January 2025
23AQI
23AQI
6th January 2025
23AQI
23AQI
7th January 2025
27AQI
27AQI
8th January 2025
34AQI
34AQI
9th January 2025
33AQI
33AQI
10th January 2025
37AQI
37AQI
11th January 2025
21AQI
21AQI
12th January 2025
29AQI
29AQI
13th January 2025
38AQI
38AQI
14th January 2025
47AQI
47AQI
15th January 2025
50AQI
50AQI
16th January 2025
46AQI
46AQI
17th January 2025
45AQI
45AQI
18th January 2025
31AQI
31AQI
19th January 2025
48AQI
48AQI
20th January 2025
41AQI
41AQI
21st January 2025
57AQI
57AQI
22nd January 2025
56AQI
56AQI
23rd January 2025
51AQI
51AQI
24th January 2025
43AQI
43AQI
25th January 2025
38AQI
38AQI
26th January 2025
34AQI
34AQI
27th January 2025
33AQI
33AQI
28th January 2025
45AQI
45AQI
29th January 2025
56AQI
56AQI
30th January 2025
77AQI
77AQI
31st January 2025
38AQI
38AQI
1st February 2025
22AQI
22AQI
2nd February 2025
25AQI
25AQI
3rd February 2025
26AQI
26AQI
4th February 2025
38AQI
38AQI
5th February 2025
33AQI
33AQI
6th February 2025
28AQI
28AQI
7th February 2025
32AQI
32AQI
8th February 2025
27AQI
27AQI
9th February 2025
46AQI
46AQI
10th February 2025
30AQI
30AQI
11th February 2025
26AQI
26AQI
12th February 2025
24AQI
24AQI
13th February 2025
23AQI
23AQI
14th February 2025
27AQI
27AQI
15th February 2025
36AQI
36AQI
16th February 2025
23AQI
23AQI
17th February 2025
20AQI
20AQI
18th February 2025
22AQI
22AQI
19th February 2025
19AQI
19AQI
20th February 2025
21AQI
21AQI
21st February 2025
22AQI
22AQI
22nd February 2025
24AQI
24AQI
23rd February 2025
19AQI
19AQI
24th February 2025
23AQI
23AQI
25th February 2025
22AQI
22AQI
26th February 2025
23AQI
23AQI
27th February 2025
21AQI
21AQI
28th February 2025
29AQI
29AQI
1st March 2025
32AQI
32AQI
2nd March 2025
21AQI
21AQI
3rd March 2025
20AQI
20AQI
4th March 2025
36AQI
36AQI
5th March 2025
50AQI
50AQI
6th March 2025
70AQI
70AQI
7th March 2025
67AQI
67AQI
8th March 2025
74AQI
74AQI
9th March 2025
73AQI
73AQI
10th March 2025
62AQI
62AQI
11th March 2025
56AQI
56AQI
12th March 2025
42AQI
42AQI
13th March 2025
33AQI
33AQI
14th March 2025
31AQI
31AQI
15th March 2025
27AQI
27AQI
16th March 2025
24AQI
24AQI
17th March 2025
24AQI
24AQI
18th March 2025
21AQI
21AQI
19th March 2025
21AQI
21AQI
20th March 2025
16AQI
16AQI
21st March 2025
16AQI
16AQI
22nd March 2025
21AQI
21AQI
23rd March 2025
21AQI
21AQI
24th March 2025
19AQI
19AQI
25th March 2025
22AQI
22AQI
26th March 2025
23AQI
23AQI
27th March 2025
16AQI
16AQI
28th March 2025
18AQI
18AQI
29th March 2025
18AQI
18AQI
30th March 2025
22AQI
22AQI
31st March 2025
19AQI
19AQI
1st April 2025
20AQI
20AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
22AQI
22AQI
4th April 2025
28AQI
28AQI
5th April 2025
20AQI
20AQI
6th April 2025
30AQI
30AQI
7th April 2025
15AQI
15AQI
8th April 2025
15AQI
15AQI
9th April 2025
16AQI
16AQI
10th April 2025
24AQI
24AQI
11th April 2025
16AQI
16AQI
12th April 2025
17AQI
17AQI
13th April 2025
18AQI
18AQI
14th April 2025
18AQI
18AQI
15th April 2025
20AQI
20AQI
16th April 2025
21AQI
21AQI
17th April 2025
18AQI
18AQI
18th April 2025
23AQI
23AQI
19th April 2025
22AQI
22AQI
20th April 2025
18AQI
18AQI
21st April 2025
17AQI
17AQI
22nd April 2025
16AQI
16AQI
23rd April 2025
23AQI
23AQI
24th April 2025
28AQI
28AQI
25th April 2025
38AQI
38AQI
26th April 2025
29AQI
29AQI
27th April 2025
24AQI
24AQI
28th April 2025
16AQI
16AQI
29th April 2025
18AQI
18AQI
30th April 2025
20AQI
20AQI
1st May 2025
29AQI
29AQI
2nd May 2025
27AQI
27AQI
3rd May 2025
16AQI
16AQI
4th May 2025
16AQI
16AQI
5th May 2025
20AQI
20AQI
6th May 2025
22AQI
22AQI
7th May 2025
24AQI
24AQI
8th May 2025
18AQI
18AQI
9th May 2025
26AQI
26AQI
10th May 2025
28AQI
28AQI
11th May 2025
16AQI
16AQI
12th May 2025
20AQI
20AQI
13th May 2025
18AQI
18AQI
14th May 2025
22AQI
22AQI
15th May 2025
19AQI
19AQI
16th May 2025
20AQI
20AQI
17th May 2025
17AQI
17AQI
18th May 2025
16AQI
16AQI
19th May 2025
18AQI
18AQI
20th May 2025
13AQI
13AQI
21st May 2025
15AQI
15AQI
22nd May 2025
23AQI
23AQI
23rd May 2025
18AQI
18AQI
24th May 2025
18AQI
18AQI
25th May 2025
19AQI
19AQI
26th May 2025
18AQI
18AQI
27th May 2025
21AQI
21AQI
28th May 2025
24AQI
24AQI
29th May 2025
17AQI
17AQI
30th May 2025
19AQI
19AQI
31st May 2025
21AQI
21AQI
1st June 2025
18AQI
18AQI
2nd June 2025
23AQI
23AQI
3rd June 2025
26AQI
26AQI
4th June 2025
16AQI
16AQI
5th June 2025
17AQI
17AQI
6th June 2025
20AQI
20AQI
7th June 2025
22AQI
22AQI
8th June 2025
38AQI
38AQI
9th June 2025
35AQI
35AQI
10th June 2025
37AQI
37AQI
11th June 2025
39AQI
39AQI
12th June 2025
34AQI
34AQI
13th June 2025
23AQI
23AQI
14th June 2025
20AQI
20AQI
15th June 2025
22AQI
22AQI
16th June 2025
24AQI
24AQI
17th June 2025
22AQI
22AQI
18th June 2025
16AQI
16AQI
19th June 2025
16AQI
16AQI
20th June 2025
18AQI
18AQI
21st June 2025
19AQI
19AQI
22nd June 2025
18AQI
18AQI
23rd June 2025
21AQI
21AQI
24th June 2025
27AQI
27AQI
25th June 2025
26AQI
26AQI
26th June 2025
19AQI
19AQI
27th June 2025
16AQI
16AQI
28th June 2025
17AQI
17AQI
29th June 2025
18AQI
18AQI
30th June 2025
23AQI
23AQI
1st July 2025
20AQI
20AQI
2nd July 2025
15AQI
15AQI
3rd July 2025
15AQI
15AQI
4th July 2025
17AQI
17AQI
5th July 2025
21AQI
21AQI
6th July 2025
18AQI
18AQI
7th July 2025
18AQI
18AQI
8th July 2025
21AQI
21AQI
9th July 2025
16AQI
16AQI
10th July 2025
15AQI
15AQI
11th July 2025
19AQI
19AQI
12th July 2025
18AQI
18AQI
13th July 2025
22AQI
22AQI
14th July 2025
17AQI
17AQI
15th July 2025
22AQI
22AQI
16th July 2025
24AQI
24AQI
17th July 2025
32AQI
32AQI
18th July 2025
34AQI
34AQI
19th July 2025
24AQI
24AQI
20th July 2025
21AQI
21AQI
21st July 2025
22AQI
22AQI
22nd July 2025
23AQI
23AQI
23rd July 2025
21AQI
21AQI
24th July 2025
20AQI
20AQI
25th July 2025
20AQI
20AQI
26th July 2025
17AQI
17AQI
27th July 2025
22AQI
22AQI
28th July 2025
21AQI
21AQI
29th July 2025
19AQI
19AQI
30th July 2025
24AQI
24AQI
31st July 2025
22AQI
22AQI
1st August 2025
18AQI
18AQI
2nd August 2025
17AQI
17AQI
3rd August 2025
22AQI
22AQI
4th August 2025
26AQI
26AQI
5th August 2025
38AQI
38AQI
6th August 2025
21AQI
21AQI
7th August 2025
18AQI
18AQI
8th August 2025
19AQI
19AQI
9th August 2025
21AQI
21AQI
10th August 2025
25AQI
25AQI
39AQI
26AQI
33AQI
21AQI
20AQI
23AQI
21AQI
23AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202526AQI
26
5
28
25
6
30
31
30
31
10
211
11
Highest AQI recorded in
January39AQI
Lowest AQI recorded in
May20AQI
202425AQI
16
1
2
1
12
29
31
31
26
1
30
1
27
3
31
237
5
Highest AQI recorded in
February42AQI
Lowest AQI recorded in
April4AQI
202324AQI
22
9
18
10
30
1
27
2
29
30
31
30
29
17
29
29
321
22
Highest AQI recorded in
February41AQI
Lowest AQI recorded in
November13AQI
202242AQI
18
10
2
1
17
12
1
23
8
58
30
3
1
Highest AQI recorded in
October51AQI
Lowest AQI recorded in
December37AQI
2021111AQI
7
11
3
10
3
1
6
2
3
10
12
9
12
3
Highest AQI recorded in
February131AQI
Lowest AQI recorded in
January102AQI
202041AQI
12
1
20
18
30
31
30
1
8
3
1
1
6
22
5
20
10
29
2
220
22
1
1
6
Highest AQI recorded in
September167AQI
Lowest AQI recorded in
June21AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2021(Avg.)
111AQILeast Polluted Year Recorded
2023(Avg.)
24AQIPortland Postal Bldg.'s annual 2025 AQI (26) shows an average percentage change of -28.01% (improved AQI) compared to previous years: 2020 (41), 2021 (111), 2022 (42), 2023 (24), 2024 (25).
