Portland Cully Helensview, 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 Cully Helensview, Portland, Oregon, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
20th Aug 2023
112AQILowest AQI recorded on
11th Aug 2024
9AQISame Day Analysis (10th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 24 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 Cully Helensview, Portland, Oregon, United States
AQI
Day
Night
.
5 AM10th Aug 2025
8 PM
4 AM11th Aug 2025
Day time
Avg. Highest Time
1PM10th Aug
27AQI
Avg. Lowest Time
7AM10th Aug
23AQI
Night time
Avg. Highest Time
3AM11th Aug
26AQI
Avg. Lowest Time
2AM11th Aug
24AQI
In the last 24 hours,
Portland Cully Helensview's AQI reached its highest point of 27 at 1 PM during the Day, while the lowest point, 23, was recorded at 7 AM during the Day between 10th Aug and 11th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Portland Cully Helensview, 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 2025165 AMAQI
12th Jul 2025176 AMAQI
12th Jul 2025197 AMAQI
12th Jul 2025208 AMAQI
12th Jul 2025199 AMAQI
12th Jul 20251910 AMAQI
12th Jul 20251811 AMAQI
12th Jul 20251712 PMAQI
12th Jul 2025171 PMAQI
12th Jul 2025192 PMAQI
12th Jul 2025173 PMAQI
12th Jul 2025184 PMAQI
12th Jul 2025185 PMAQI
12th Jul 2025176 PMAQI
12th Jul 2025187 PMAQI
12th Jul 2025198 PMAQI
12th Jul 2025189 PMAQI
12th Jul 20251810 PMAQI
12th Jul 20251911 PMAQI
13th Jul 20251912 AMAQI
13th Jul 2025201 AMAQI
13th Jul 2025172 AMAQI
13th Jul 2025163 AMAQI
13th Jul 2025204 AMAQI
24°C17/30°C
13th Jul 2025185 AMAQI
13th Jul 2025186 AMAQI
13th Jul 2025207 AMAQI
13th Jul 2025208 AMAQI
13th Jul 2025189 AMAQI
13th Jul 20251810 AMAQI
13th Jul 20251811 AMAQI
13th Jul 20251812 PMAQI
13th Jul 2025181 PMAQI
13th Jul 2025192 PMAQI
13th Jul 2025183 PMAQI
13th Jul 2025184 PMAQI
13th Jul 2025185 PMAQI
13th Jul 2025186 PMAQI
13th Jul 2025187 PMAQI
13th Jul 2025228 PMAQI
13th Jul 2025189 PMAQI
13th Jul 20251810 PMAQI
13th Jul 20251811 PMAQI
14th Jul 20252012 AMAQI
14th Jul 2025171 AMAQI
14th Jul 2025162 AMAQI
14th Jul 2025163 AMAQI
14th Jul 2025164 AMAQI
26°C19/37°C
14th Jul 2025165 AMAQI
14th Jul 2025166 AMAQI
14th Jul 2025167 AMAQI
14th Jul 2025168 AMAQI
14th Jul 2025159 AMAQI
14th Jul 20251410 AMAQI
14th Jul 20251511 AMAQI
14th Jul 20251412 PMAQI
14th Jul 2025141 PMAQI
14th Jul 2025162 PMAQI
14th Jul 2025143 PMAQI
14th Jul 2025144 PMAQI
14th Jul 2025145 PMAQI
14th Jul 2025156 PMAQI
14th Jul 2025167 PMAQI
14th Jul 2025168 PMAQI
14th Jul 2025169 PMAQI
14th Jul 20251810 PMAQI
14th Jul 20251711 PMAQI
15th Jul 20251712 AMAQI
15th Jul 2025191 AMAQI
15th Jul 2025182 AMAQI
15th Jul 2025183 AMAQI
15th Jul 2025184 AMAQI
20°C16/29°C
15th Jul 2025165 AMAQI
15th Jul 2025166 AMAQI
15th Jul 2025167 AMAQI
15th Jul 2025188 AMAQI
15th Jul 2025179 AMAQI
15th Jul 20251710 AMAQI
15th Jul 20251711 AMAQI
15th Jul 20251812 PMAQI
15th Jul 2025181 PMAQI
15th Jul 2025192 PMAQI
15th Jul 2025183 PMAQI
15th Jul 2025184 PMAQI
15th Jul 2025185 PMAQI
15th Jul 2025206 PMAQI
15th Jul 2025187 PMAQI
15th Jul 2025198 PMAQI
15th Jul 2025199 PMAQI
15th Jul 20252010 PMAQI
15th Jul 20251911 PMAQI
16th Jul 20252012 AMAQI
16th Jul 2025181 AMAQI
16th Jul 2025192 AMAQI
16th Jul 2025193 AMAQI
16th Jul 2025204 AMAQI
24°C14/33°C
16th Jul 2025215 AMAQI
16th Jul 2025206 AMAQI
16th Jul 2025197 AMAQI
16th Jul 2025208 AMAQI
16th Jul 2025209 AMAQI
16th Jul 20252010 AMAQI
16th Jul 20252111 AMAQI
16th Jul 20252212 PMAQI
16th Jul 2025221 PMAQI
16th Jul 2025212 PMAQI
16th Jul 2025213 PMAQI
16th Jul 2025224 PMAQI
16th Jul 2025225 PMAQI
16th Jul 2025226 PMAQI
16th Jul 2025207 PMAQI
16th Jul 2025188 PMAQI
16th Jul 2025199 PMAQI
16th Jul 20252210 PMAQI
16th Jul 20252311 PMAQI
17th Jul 20252412 AMAQI
17th Jul 2025231 AMAQI
17th Jul 2025242 AMAQI
17th Jul 2025263 AMAQI
17th Jul 2025324 AMAQI
29°C21/37°C
17th Jul 2025345 AMAQI
17th Jul 2025366 AMAQI
17th Jul 2025357 AMAQI
17th Jul 2025368 AMAQI
17th Jul 2025369 AMAQI
17th Jul 20253810 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253712 PMAQI
17th Jul 2025341 PMAQI
17th Jul 2025362 PMAQI
17th Jul 2025333 PMAQI
17th Jul 2025364 PMAQI
17th Jul 2025375 PMAQI
17th Jul 2025346 PMAQI
17th Jul 2025347 PMAQI
17th Jul 2025328 PMAQI
17th Jul 2025299 PMAQI
17th Jul 20252710 PMAQI
17th Jul 20252811 PMAQI
18th Jul 20252812 AMAQI
18th Jul 2025291 AMAQI
18th Jul 2025322 AMAQI
18th Jul 2025323 AMAQI
18th Jul 2025324 AMAQI
24°C17/32°C
18th Jul 2025315 AMAQI
18th Jul 2025316 AMAQI
18th Jul 2025307 AMAQI
18th Jul 2025328 AMAQI
18th Jul 2025329 AMAQI
18th Jul 20253610 AMAQI
18th Jul 20253611 AMAQI
18th Jul 20253612 PMAQI
18th Jul 2025361 PMAQI
18th Jul 2025342 PMAQI
18th Jul 2025343 PMAQI
18th Jul 2025364 PMAQI
18th Jul 2025345 PMAQI
18th Jul 2025336 PMAQI
18th Jul 2025337 PMAQI
18th Jul 2025308 PMAQI
18th Jul 2025259 PMAQI
18th Jul 20252510 PMAQI
18th Jul 20252411 PMAQI
19th Jul 20252412 AMAQI
19th Jul 2025241 AMAQI
19th Jul 2025242 AMAQI
19th Jul 2025233 AMAQI
19th Jul 2025194 AMAQI
22°C17/29°C
19th Jul 2025185 AMAQI
19th Jul 2025206 AMAQI
19th Jul 2025197 AMAQI
19th Jul 2025218 AMAQI
19th Jul 2025209 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252211 AMAQI
19th Jul 20252212 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025223 PMAQI
19th Jul 2025224 PMAQI
19th Jul 2025225 PMAQI
19th Jul 2025226 PMAQI
19th Jul 2025227 PMAQI
19th Jul 2025228 PMAQI
19th Jul 2025249 PMAQI
19th Jul 20252410 PMAQI
19th Jul 20252411 PMAQI
20th Jul 20252412 AMAQI
20th Jul 2025241 AMAQI
20th Jul 2025242 AMAQI
20th Jul 2025223 AMAQI
20th Jul 2025204 AMAQI
19°C15/26°C
20th Jul 2025205 AMAQI
20th Jul 2025206 AMAQI
20th Jul 2025197 AMAQI
20th Jul 2025198 AMAQI
20th Jul 2025189 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20251911 AMAQI
20th Jul 20252012 PMAQI
20th Jul 2025201 PMAQI
20th Jul 2025202 PMAQI
20th Jul 2025213 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025226 PMAQI
20th Jul 2025227 PMAQI
20th Jul 2025218 PMAQI
20th Jul 2025229 PMAQI
20th Jul 20252010 PMAQI
20th Jul 20252011 PMAQI
21st Jul 20252212 AMAQI
21st Jul 2025221 AMAQI
21st Jul 2025232 AMAQI
21st Jul 2025223 AMAQI
21st Jul 2025194 AMAQI
18°C14/22°C
21st Jul 2025185 AMAQI
21st Jul 2025186 AMAQI
21st Jul 2025207 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025229 AMAQI
21st Jul 20252310 AMAQI
21st Jul 20252711 AMAQI
21st Jul 20252612 PMAQI
21st Jul 2025281 PMAQI
21st Jul 2025272 PMAQI
21st Jul 2025283 PMAQI
21st Jul 2025264 PMAQI
21st Jul 2025265 PMAQI
21st Jul 2025286 PMAQI
21st Jul 2025247 PMAQI
21st Jul 2025248 PMAQI
21st Jul 2025259 PMAQI
21st Jul 20252310 PMAQI
21st Jul 20252411 PMAQI
22nd Jul 20252512 AMAQI
22nd Jul 2025241 AMAQI
22nd Jul 2025242 AMAQI
22nd Jul 2025233 AMAQI
22nd Jul 2025234 AMAQI
20°C16/24°C
22nd Jul 2025225 AMAQI
22nd Jul 2025236 AMAQI
22nd Jul 2025247 AMAQI
22nd Jul 2025258 AMAQI
22nd Jul 2025269 AMAQI
22nd Jul 20253110 AMAQI
22nd Jul 20252811 AMAQI
22nd Jul 20252812 PMAQI
22nd Jul 2025281 PMAQI
22nd Jul 2025302 PMAQI
22nd Jul 2025293 PMAQI
22nd Jul 2025314 PMAQI
22nd Jul 2025295 PMAQI
22nd Jul 2025256 PMAQI
22nd Jul 2025257 PMAQI
22nd Jul 2025248 PMAQI
22nd Jul 2025249 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252312 AMAQI
23rd Jul 2025221 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025223 AMAQI
23rd Jul 2025184 AMAQI
21°C15/30°C
23rd Jul 2025185 AMAQI
23rd Jul 2025196 AMAQI
23rd Jul 2025187 AMAQI
23rd Jul 2025198 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20252510 AMAQI
23rd Jul 20252911 AMAQI
23rd Jul 20253212 PMAQI
23rd Jul 2025331 PMAQI
23rd Jul 2025312 PMAQI
23rd Jul 2025293 PMAQI
23rd Jul 2025284 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 2025211 AMAQI
24th Jul 2025202 AMAQI
24th Jul 2025193 AMAQI
24th Jul 2025194 AMAQI
24°C17/34°C
24th Jul 2025205 AMAQI
24th Jul 2025216 AMAQI
24th Jul 2025207 AMAQI
24th Jul 2025208 AMAQI
24th Jul 2025229 AMAQI
24th Jul 20252310 AMAQI
24th Jul 20252511 AMAQI
24th Jul 20252812 PMAQI
24th Jul 2025321 PMAQI
24th Jul 2025342 PMAQI
24th Jul 2025303 PMAQI
24th Jul 2025304 PMAQI
24th Jul 2025315 PMAQI
24th Jul 2025316 PMAQI
24th Jul 2025247 PMAQI
24th Jul 2025248 PMAQI
24th Jul 2025249 PMAQI
24th Jul 20252110 PMAQI
24th Jul 20251911 PMAQI
25th Jul 20251712 AMAQI
25th Jul 2025181 AMAQI
25th Jul 2025172 AMAQI
25th Jul 2025193 AMAQI
25th Jul 2025184 AMAQI
22°C17/31°C
25th Jul 2025195 AMAQI
25th Jul 2025206 AMAQI
25th Jul 2025187 AMAQI
25th Jul 2025188 AMAQI
25th Jul 2025179 AMAQI
25th Jul 20251810 AMAQI
25th Jul 20252111 AMAQI
25th Jul 20252112 PMAQI
25th Jul 2025221 PMAQI
25th Jul 2025232 PMAQI
25th Jul 2025223 PMAQI
25th Jul 2025214 PMAQI
25th Jul 2025235 PMAQI
25th Jul 2025216 PMAQI
25th Jul 2025197 PMAQI
25th Jul 2025208 PMAQI
25th Jul 2025179 PMAQI
25th Jul 20251610 PMAQI
25th Jul 20251611 PMAQI
26th Jul 20251712 AMAQI
26th Jul 2025161 AMAQI
26th Jul 2025172 AMAQI
26th Jul 2025163 AMAQI
26th Jul 2025164 AMAQI
19°C15/24°C
26th Jul 2025165 AMAQI
26th Jul 2025176 AMAQI
26th Jul 2025207 AMAQI
26th Jul 2025208 AMAQI
26th Jul 2025189 AMAQI
26th Jul 20251810 AMAQI
26th Jul 20251711 AMAQI
26th Jul 20251712 PMAQI
26th Jul 2025181 PMAQI
26th Jul 2025192 PMAQI
26th Jul 2025193 PMAQI
26th Jul 2025194 PMAQI
26th Jul 2025195 PMAQI
26th Jul 2025196 PMAQI
26th Jul 2025197 PMAQI
26th Jul 2025188 PMAQI
26th Jul 2025189 PMAQI
26th Jul 20251810 PMAQI
26th Jul 20251911 PMAQI
27th Jul 20251912 AMAQI
27th Jul 2025201 AMAQI
27th Jul 2025222 AMAQI
27th Jul 2025213 AMAQI
27th Jul 2025224 AMAQI
17°C13/22°C
27th Jul 2025245 AMAQI
27th Jul 2025256 AMAQI
27th Jul 2025267 AMAQI
27th Jul 2025288 AMAQI
27th Jul 2025299 AMAQI
27th Jul 20252710 AMAQI
27th Jul 20252411 AMAQI
27th Jul 20252312 PMAQI
27th Jul 2025221 PMAQI
27th Jul 2025232 PMAQI
27th Jul 2025273 PMAQI
27th Jul 2025264 PMAQI
27th Jul 2025255 PMAQI
27th Jul 2025246 PMAQI
27th Jul 2025257 PMAQI
27th Jul 2025248 PMAQI
27th Jul 2025239 PMAQI
27th Jul 20252210 PMAQI
27th Jul 20252211 PMAQI
28th Jul 20252312 AMAQI
28th Jul 2025231 AMAQI
28th Jul 2025242 AMAQI
28th Jul 2025243 AMAQI
28th Jul 2025234 AMAQI
20°C14/28°C
28th Jul 2025225 AMAQI
28th Jul 2025226 AMAQI
28th Jul 2025227 AMAQI
28th Jul 2025238 AMAQI
28th Jul 2025239 AMAQI
28th Jul 20252310 AMAQI
28th Jul 20252411 AMAQI
28th Jul 20252412 PMAQI
28th Jul 2025251 PMAQI
28th Jul 2025262 PMAQI
28th Jul 2025243 PMAQI
28th Jul 2025244 PMAQI
28th Jul 2025245 PMAQI
28th Jul 2025236 PMAQI
28th Jul 2025247 PMAQI
28th Jul 2025248 PMAQI
28th Jul 2025239 PMAQI
28th Jul 20252210 PMAQI
28th Jul 20252211 PMAQI
29th Jul 20252112 AMAQI
29th Jul 2025221 AMAQI
29th Jul 2025202 AMAQI
29th Jul 2025183 AMAQI
29th Jul 2025184 AMAQI
22°C15/31°C
29th Jul 2025175 AMAQI
29th Jul 2025176 AMAQI
29th Jul 2025187 AMAQI
29th Jul 2025178 AMAQI
29th Jul 2025179 AMAQI
29th Jul 20252010 AMAQI
29th Jul 20252811 AMAQI
29th Jul 20252212 PMAQI
29th Jul 2025221 PMAQI
29th Jul 2025262 PMAQI
29th Jul 2025243 PMAQI
29th Jul 2025244 PMAQI
29th Jul 2025235 PMAQI
29th Jul 2025246 PMAQI
29th Jul 2025227 PMAQI
29th Jul 2025218 PMAQI
29th Jul 2025229 PMAQI
29th Jul 20252110 PMAQI
29th Jul 20252211 PMAQI
30th Jul 20252412 AMAQI
30th Jul 2025261 AMAQI
30th Jul 2025262 AMAQI
30th Jul 2025263 AMAQI
30th Jul 2025264 AMAQI
24°C16/33°C
30th Jul 2025245 AMAQI
30th Jul 2025226 AMAQI
30th Jul 2025257 AMAQI
30th Jul 2025218 AMAQI
30th Jul 2025199 AMAQI
30th Jul 20252010 AMAQI
30th Jul 20252411 AMAQI
30th Jul 20252512 PMAQI
30th Jul 2025251 PMAQI
30th Jul 2025272 PMAQI
30th Jul 2025273 PMAQI
30th Jul 2025274 PMAQI
30th Jul 2025275 PMAQI
30th Jul 2025276 PMAQI
30th Jul 2025277 PMAQI
30th Jul 2025278 PMAQI
30th Jul 2025289 PMAQI
30th Jul 20253010 PMAQI
30th Jul 20252911 PMAQI
31st Jul 20252612 AMAQI
31st Jul 2025241 AMAQI
31st Jul 2025242 AMAQI
31st Jul 2025193 AMAQI
31st Jul 2025154 AMAQI
23°C17/32°C
31st Jul 2025155 AMAQI
31st Jul 2025166 AMAQI
31st Jul 2025197 AMAQI
31st Jul 2025188 AMAQI
31st Jul 2025179 AMAQI
31st Jul 20252010 AMAQI
31st Jul 20252311 AMAQI
31st Jul 20253212 PMAQI
31st Jul 2025261 PMAQI
31st Jul 2025242 PMAQI
31st Jul 2025213 PMAQI
31st Jul 2025214 PMAQI
31st Jul 2025205 PMAQI
31st Jul 2025206 PMAQI
31st Jul 2025257 PMAQI
31st Jul 2025248 PMAQI
31st Jul 2025249 PMAQI
31st Jul 20252610 PMAQI
31st Jul 20252411 PMAQI
1st Aug 20252212 AMAQI
1st Aug 2025201 AMAQI
1st Aug 2025192 AMAQI
1st Aug 2025203 AMAQI
1st Aug 2025204 AMAQI
22°C17/30°C
1st Aug 2025205 AMAQI
1st Aug 2025166 AMAQI
1st Aug 2025147 AMAQI
1st Aug 2025158 AMAQI
1st Aug 2025169 AMAQI
1st Aug 20251610 AMAQI
1st Aug 20251711 AMAQI
1st Aug 20251612 PMAQI
1st Aug 2025191 PMAQI
1st Aug 2025172 PMAQI
1st Aug 2025183 PMAQI
1st Aug 2025184 PMAQI
1st Aug 2025175 PMAQI
1st Aug 2025176 PMAQI
1st Aug 2025187 PMAQI
1st Aug 2025188 PMAQI
1st Aug 2025189 PMAQI
1st Aug 20251810 PMAQI
1st Aug 20251811 PMAQI
2nd Aug 20252012 AMAQI
2nd Aug 2025181 AMAQI
2nd Aug 2025182 AMAQI
2nd Aug 2025183 AMAQI
2nd Aug 2025184 AMAQI
21°C16/28°C
2nd Aug 2025175 AMAQI
2nd Aug 2025166 AMAQI
2nd Aug 2025157 AMAQI
2nd Aug 2025148 AMAQI
2nd Aug 2025149 AMAQI
2nd Aug 20251410 AMAQI
2nd Aug 20251411 AMAQI
2nd Aug 20251312 PMAQI
2nd Aug 2025141 PMAQI
2nd Aug 2025132 PMAQI
2nd Aug 2025143 PMAQI
2nd Aug 2025144 PMAQI
2nd Aug 2025145 PMAQI
2nd Aug 2025136 PMAQI
2nd Aug 2025167 PMAQI
2nd Aug 2025168 PMAQI
2nd Aug 2025189 PMAQI
2nd Aug 20252110 PMAQI
2nd Aug 20252011 PMAQI
3rd Aug 20252012 AMAQI
3rd Aug 2025211 AMAQI
3rd Aug 2025222 AMAQI
3rd Aug 2025213 AMAQI
3rd Aug 2025214 AMAQI
19°C17/23°C
3rd Aug 2025205 AMAQI
3rd Aug 2025196 AMAQI
3rd Aug 2025197 AMAQI
3rd Aug 2025188 AMAQI
3rd Aug 2025189 AMAQI
3rd Aug 20251710 AMAQI
3rd Aug 20251711 AMAQI
3rd Aug 20251612 PMAQI
3rd Aug 2025161 PMAQI
3rd Aug 2025182 PMAQI
3rd Aug 2025183 PMAQI
3rd Aug 2025184 PMAQI
3rd Aug 2025205 PMAQI
3rd Aug 2025206 PMAQI
3rd Aug 2025207 PMAQI
3rd Aug 2025218 PMAQI
3rd Aug 2025249 PMAQI
3rd Aug 20252210 PMAQI
3rd Aug 20252211 PMAQI
4th Aug 20252212 AMAQI
4th Aug 2025221 AMAQI
4th Aug 2025222 AMAQI
4th Aug 2025223 AMAQI
4th Aug 2025224 AMAQI
18°C15/22°C
4th Aug 2025225 AMAQI
4th Aug 2025206 AMAQI
4th Aug 2025217 AMAQI
4th Aug 2025208 AMAQI
4th Aug 2025209 AMAQI
4th Aug 20252010 AMAQI
4th Aug 20252011 AMAQI
4th Aug 20252212 PMAQI
4th Aug 2025241 PMAQI
4th Aug 2025242 PMAQI
4th Aug 2025223 PMAQI
4th Aug 2025244 PMAQI
4th Aug 2025295 PMAQI
4th Aug 2025336 PMAQI
4th Aug 2025217 PMAQI
4th Aug 2025328 PMAQI
4th Aug 2025469 PMAQI
4th Aug 20255010 PMAQI
4th Aug 20255211 PMAQI
5th Aug 20255112 AMAQI
5th Aug 2025471 AMAQI
5th Aug 2025452 AMAQI
5th Aug 2025423 AMAQI
5th Aug 2025424 AMAQI
19°C15/24°C
5th Aug 2025395 AMAQI
5th Aug 2025406 AMAQI
5th Aug 2025387 AMAQI
5th Aug 2025388 AMAQI
5th Aug 2025369 AMAQI
5th Aug 20253510 AMAQI
5th Aug 20253411 AMAQI
5th Aug 20253412 PMAQI
5th Aug 2025441 PMAQI
5th Aug 2025552 PMAQI
5th Aug 2025543 PMAQI
5th Aug 2025524 PMAQI
5th Aug 2025505 PMAQI
5th Aug 2025466 PMAQI
5th Aug 2025487 PMAQI
5th Aug 2025448 PMAQI
5th Aug 2025369 PMAQI
5th Aug 20253510 PMAQI
5th Aug 20253411 PMAQI
6th Aug 20253212 AMAQI
6th Aug 2025281 AMAQI
6th Aug 2025242 AMAQI
6th Aug 2025223 AMAQI
6th Aug 2025214 AMAQI
21°C15/29°C
6th Aug 2025215 AMAQI
6th Aug 2025216 AMAQI
6th Aug 2025207 AMAQI
6th Aug 2025218 AMAQI
6th Aug 2025219 AMAQI
6th Aug 20252410 AMAQI
6th Aug 20252211 AMAQI
6th Aug 20252212 PMAQI
6th Aug 2025201 PMAQI
6th Aug 2025202 PMAQI
6th Aug 2025213 PMAQI
6th Aug 2025224 PMAQI
6th Aug 2025205 PMAQI
6th Aug 2025206 PMAQI
6th Aug 2025247 PMAQI
6th Aug 2025248 PMAQI
6th Aug 2025209 PMAQI
6th Aug 20251910 PMAQI
6th Aug 20252011 PMAQI
7th Aug 20252112 AMAQI
7th Aug 2025201 AMAQI
7th Aug 2025202 AMAQI
7th Aug 2025183 AMAQI
7th Aug 2025194 AMAQI
20°C16/24°C
7th Aug 2025205 AMAQI
7th Aug 2025206 AMAQI
7th Aug 2025207 AMAQI
7th Aug 2025208 AMAQI
7th Aug 2025199 AMAQI
7th Aug 20251910 AMAQI
7th Aug 20251811 AMAQI
7th Aug 20252012 PMAQI
7th Aug 2025181 PMAQI
7th Aug 2025202 PMAQI
7th Aug 2025213 PMAQI
7th Aug 2025214 PMAQI
7th Aug 2025205 PMAQI
7th Aug 2025196 PMAQI
7th Aug 2025197 PMAQI
7th Aug 2025218 PMAQI
7th Aug 2025189 PMAQI
7th Aug 20251810 PMAQI
7th Aug 20252011 PMAQI
8th Aug 20252012 AMAQI
8th Aug 2025211 AMAQI
8th Aug 2025212 AMAQI
8th Aug 2025213 AMAQI
8th Aug 2025194 AMAQI
20°C16/24°C
8th Aug 2025195 AMAQI
8th Aug 2025196 AMAQI
8th Aug 2025207 AMAQI
8th Aug 2025198 AMAQI
8th Aug 2025199 AMAQI
8th Aug 20251910 AMAQI
8th Aug 20252011 AMAQI
8th Aug 20252112 PMAQI
8th Aug 2025211 PMAQI
8th Aug 2025202 PMAQI
8th Aug 2025213 PMAQI
8th Aug 2025214 PMAQI
8th Aug 2025205 PMAQI
8th Aug 2025216 PMAQI
8th Aug 2025217 PMAQI
8th Aug 2025208 PMAQI
8th Aug 2025209 PMAQI
8th Aug 20252010 PMAQI
8th Aug 20252211 PMAQI
9th Aug 20252112 AMAQI
9th Aug 2025221 AMAQI
9th Aug 2025222 AMAQI
9th Aug 2025233 AMAQI
9th Aug 2025224 AMAQI
21°C14/29°C
9th Aug 2025215 AMAQI
9th Aug 2025226 AMAQI
9th Aug 2025217 AMAQI
9th Aug 2025218 AMAQI
9th Aug 2025219 AMAQI
9th Aug 20252010 AMAQI
9th Aug 20252111 AMAQI
9th Aug 20252012 PMAQI
9th Aug 2025211 PMAQI
9th Aug 2025222 PMAQI
9th Aug 2025223 PMAQI
9th Aug 2025224 PMAQI
9th Aug 2025225 PMAQI
9th Aug 2025216 PMAQI
9th Aug 2025227 PMAQI
9th Aug 2025238 PMAQI
9th Aug 2025249 PMAQI
9th Aug 20252410 PMAQI
9th Aug 20252411 PMAQI
10th Aug 20252312 AMAQI
10th Aug 2025231 AMAQI
10th Aug 2025222 AMAQI
10th Aug 2025243 AMAQI
10th Aug 2025244 AMAQI
23°C16/29°C
10th Aug 2025255 AMAQI
10th Aug 2025246 AMAQI
10th Aug 2025237 AMAQI
10th Aug 2025248 AMAQI
10th Aug 2025249 AMAQI
10th Aug 20252510 AMAQI
10th Aug 20252411 AMAQI
10th Aug 20252512 PMAQI
10th Aug 2025271 PMAQI
10th Aug 2025272 PMAQI
10th Aug 2025273 PMAQI
10th Aug 2025264 PMAQI
10th Aug 2025265 PMAQI
10th Aug 2025256 PMAQI
10th Aug 2025257 PMAQI
10th Aug 2025268 PMAQI
10th Aug 2025249 PMAQI
10th Aug 20252410 PMAQI
10th Aug 20252411 PMAQI
11th Aug 20252412 AMAQI
11th Aug 2025251 AMAQI
11th Aug 2025242 AMAQI
11th Aug 2025263 AMAQI
11th Aug 2025254 AMAQI
27°C19/38°C
11th Aug 2025255 AMAQI
5 AM11th Aug 2025266 AMAQI
11th Aug 2025257 AMAQI
11th Aug 2025258 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
23AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
23AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 23), while the lowest AQI was between 5 AM to 8 PM (Avg. 23).
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 Cully Helensview, Portland, Oregon, United States
2025
97%
215
3%
7
Total number of days with different AQI categories in last 223 days in 2025 (142 days remaining)
Good
215 DaysModerate
7 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 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 Cully Helensview, 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
27AQI
27AQI
2nd January 2025
23AQI
23AQI
3rd January 2025
21AQI
21AQI
4th January 2025
23AQI
23AQI
5th January 2025
20AQI
20AQI
6th January 2025
20AQI
20AQI
7th January 2025
22AQI
22AQI
8th January 2025
27AQI
27AQI
9th January 2025
30AQI
30AQI
10th January 2025
32AQI
32AQI
11th January 2025
21AQI
21AQI
12th January 2025
29AQI
29AQI
13th January 2025
42AQI
42AQI
14th January 2025
51AQI
51AQI
15th January 2025
47AQI
47AQI
16th January 2025
50AQI
50AQI
17th January 2025
47AQI
47AQI
18th January 2025
32AQI
32AQI
19th January 2025
47AQI
47AQI
20th January 2025
32AQI
32AQI
21st January 2025
51AQI
51AQI
22nd January 2025
55AQI
55AQI
23rd January 2025
56AQI
56AQI
24th January 2025
45AQI
45AQI
25th January 2025
36AQI
36AQI
26th January 2025
32AQI
32AQI
27th January 2025
41AQI
41AQI
28th January 2025
51AQI
51AQI
29th January 2025
55AQI
55AQI
30th January 2025
68AQI
68AQI
31st January 2025
36AQI
36AQI
1st February 2025
20AQI
20AQI
2nd February 2025
26AQI
26AQI
3rd February 2025
23AQI
23AQI
4th February 2025
31AQI
31AQI
5th February 2025
31AQI
31AQI
6th February 2025
29AQI
29AQI
7th February 2025
29AQI
29AQI
8th February 2025
27AQI
27AQI
9th February 2025
45AQI
45AQI
10th February 2025
34AQI
34AQI
11th February 2025
24AQI
24AQI
12th February 2025
25AQI
25AQI
13th February 2025
24AQI
24AQI
14th February 2025
30AQI
30AQI
15th February 2025
37AQI
37AQI
16th February 2025
21AQI
21AQI
17th February 2025
21AQI
21AQI
18th February 2025
20AQI
20AQI
19th February 2025
21AQI
21AQI
20th February 2025
21AQI
21AQI
21st February 2025
22AQI
22AQI
22nd February 2025
21AQI
21AQI
23rd February 2025
16AQI
16AQI
24th February 2025
21AQI
21AQI
25th February 2025
21AQI
21AQI
26th February 2025
29AQI
29AQI
27th February 2025
24AQI
24AQI
28th February 2025
39AQI
39AQI
1st March 2025
38AQI
38AQI
2nd March 2025
26AQI
26AQI
3rd March 2025
29AQI
29AQI
4th March 2025
24AQI
24AQI
5th March 2025
36AQI
36AQI
6th March 2025
36AQI
36AQI
7th March 2025
42AQI
42AQI
8th March 2025
43AQI
43AQI
9th March 2025
42AQI
42AQI
10th March 2025
36AQI
36AQI
11th March 2025
47AQI
47AQI
12th March 2025
28AQI
28AQI
13th March 2025
21AQI
21AQI
14th March 2025
24AQI
24AQI
15th March 2025
24AQI
24AQI
16th March 2025
24AQI
24AQI
17th March 2025
24AQI
24AQI
18th March 2025
21AQI
21AQI
19th March 2025
20AQI
20AQI
20th March 2025
17AQI
17AQI
21st March 2025
18AQI
18AQI
22nd March 2025
23AQI
23AQI
23rd March 2025
21AQI
21AQI
24th March 2025
21AQI
21AQI
25th March 2025
31AQI
31AQI
26th March 2025
30AQI
30AQI
27th March 2025
19AQI
19AQI
28th March 2025
18AQI
18AQI
29th March 2025
21AQI
21AQI
30th March 2025
29AQI
29AQI
31st March 2025
19AQI
19AQI
1st April 2025
24AQI
24AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
26AQI
26AQI
4th April 2025
31AQI
31AQI
5th April 2025
20AQI
20AQI
6th April 2025
33AQI
33AQI
7th April 2025
17AQI
17AQI
8th April 2025
16AQI
16AQI
9th April 2025
20AQI
20AQI
10th April 2025
20AQI
20AQI
11th April 2025
20AQI
20AQI
12th April 2025
19AQI
19AQI
13th April 2025
23AQI
23AQI
14th April 2025
24AQI
24AQI
15th April 2025
27AQI
27AQI
16th April 2025
28AQI
28AQI
17th April 2025
25AQI
25AQI
18th April 2025
28AQI
28AQI
19th April 2025
24AQI
24AQI
20th April 2025
19AQI
19AQI
21st April 2025
19AQI
19AQI
22nd April 2025
21AQI
21AQI
23rd April 2025
25AQI
25AQI
24th April 2025
34AQI
34AQI
25th April 2025
38AQI
38AQI
26th April 2025
28AQI
28AQI
27th April 2025
24AQI
24AQI
28th April 2025
17AQI
17AQI
29th April 2025
18AQI
18AQI
30th April 2025
19AQI
19AQI
1st May 2025
33AQI
33AQI
2nd May 2025
24AQI
24AQI
3rd May 2025
15AQI
15AQI
4th May 2025
16AQI
16AQI
5th May 2025
20AQI
20AQI
6th May 2025
25AQI
25AQI
7th May 2025
23AQI
23AQI
8th May 2025
26AQI
26AQI
9th May 2025
28AQI
28AQI
10th May 2025
22AQI
22AQI
11th May 2025
15AQI
15AQI
12th May 2025
19AQI
19AQI
13th May 2025
20AQI
20AQI
14th May 2025
22AQI
22AQI
15th May 2025
20AQI
20AQI
16th May 2025
22AQI
22AQI
17th May 2025
21AQI
21AQI
18th May 2025
15AQI
15AQI
19th May 2025
18AQI
18AQI
20th May 2025
13AQI
13AQI
21st May 2025
18AQI
18AQI
22nd May 2025
23AQI
23AQI
23rd May 2025
20AQI
20AQI
24th May 2025
20AQI
20AQI
25th May 2025
18AQI
18AQI
26th May 2025
15AQI
15AQI
27th May 2025
19AQI
19AQI
28th May 2025
23AQI
23AQI
29th May 2025
16AQI
16AQI
30th May 2025
21AQI
21AQI
31st May 2025
18AQI
18AQI
1st June 2025
18AQI
18AQI
2nd June 2025
24AQI
24AQI
3rd June 2025
25AQI
25AQI
4th June 2025
18AQI
18AQI
5th June 2025
18AQI
18AQI
6th June 2025
22AQI
22AQI
7th June 2025
21AQI
21AQI
8th June 2025
31AQI
31AQI
9th June 2025
33AQI
33AQI
10th June 2025
33AQI
33AQI
11th June 2025
36AQI
36AQI
12th June 2025
32AQI
32AQI
13th June 2025
23AQI
23AQI
14th June 2025
20AQI
20AQI
15th June 2025
23AQI
23AQI
16th June 2025
25AQI
25AQI
17th June 2025
21AQI
21AQI
18th June 2025
16AQI
16AQI
19th June 2025
18AQI
18AQI
20th June 2025
17AQI
17AQI
21st June 2025
18AQI
18AQI
22nd June 2025
18AQI
18AQI
23rd June 2025
25AQI
25AQI
24th June 2025
31AQI
31AQI
25th June 2025
32AQI
32AQI
26th June 2025
29AQI
29AQI
27th June 2025
18AQI
18AQI
28th June 2025
14AQI
14AQI
29th June 2025
20AQI
20AQI
30th June 2025
23AQI
23AQI
1st July 2025
22AQI
22AQI
2nd July 2025
17AQI
17AQI
3rd July 2025
16AQI
16AQI
4th July 2025
16AQI
16AQI
5th July 2025
21AQI
21AQI
6th July 2025
18AQI
18AQI
7th July 2025
20AQI
20AQI
8th July 2025
23AQI
23AQI
9th July 2025
16AQI
16AQI
10th July 2025
15AQI
15AQI
11th July 2025
18AQI
18AQI
12th July 2025
18AQI
18AQI
13th July 2025
18AQI
18AQI
14th July 2025
16AQI
16AQI
15th July 2025
18AQI
18AQI
16th July 2025
20AQI
20AQI
17th July 2025
32AQI
32AQI
18th July 2025
31AQI
31AQI
19th July 2025
22AQI
22AQI
20th July 2025
21AQI
21AQI
21st July 2025
23AQI
23AQI
22nd July 2025
25AQI
25AQI
23rd July 2025
23AQI
23AQI
24th July 2025
24AQI
24AQI
25th July 2025
19AQI
19AQI
26th July 2025
18AQI
18AQI
27th July 2025
24AQI
24AQI
28th July 2025
23AQI
23AQI
29th July 2025
21AQI
21AQI
30th July 2025
26AQI
26AQI
31st July 2025
22AQI
22AQI
1st August 2025
18AQI
18AQI
2nd August 2025
16AQI
16AQI
3rd August 2025
20AQI
20AQI
4th August 2025
27AQI
27AQI
5th August 2025
42AQI
42AQI
6th August 2025
22AQI
22AQI
7th August 2025
19AQI
19AQI
8th August 2025
20AQI
20AQI
9th August 2025
22AQI
22AQI
10th August 2025
24AQI
24AQI
38AQI
26AQI
27AQI
24AQI
20AQI
23AQI
21AQI
23AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202526AQI
24
7
28
31
30
31
30
31
10
215
7
Highest AQI recorded in
January38AQI
Lowest AQI recorded in
May20AQI
202422AQI
31
29
31
30
31
29
31
31
27
3
31
28
2
31
360
5
Highest AQI recorded in
November31AQI
Lowest AQI recorded in
June16AQI
202324AQI
29
2
25
3
31
30
31
30
29
2
25
5
1
30
29
2
26
3
31
346
17
1
Highest AQI recorded in
August34AQI
Lowest AQI recorded in
April15AQI
202229AQI
28
2
18
4
29
2
17
31
30
21
3
25
3
1
14
13
3
1
19
11
26
5
261
40
4
1
Highest AQI recorded in
October60AQI
Lowest AQI recorded in
May15AQI
202124AQI
29
1
28
28
2
1
30
31
30
31
30
1
29
1
28
2
28
1
31
353
7
2
Highest AQI recorded in
March33AQI
Lowest AQI recorded in
May17AQI
202030AQI
13
20
18
30
31
31
18
4
1
4
3
24
6
27
3
30
1
242
14
1
4
3
Highest AQI recorded in
September102AQI
Lowest AQI recorded in
June12AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
30AQILeast Polluted Year Recorded
2024(Avg.)
22AQIPortland Cully Helensview's annual 2025 AQI (26) shows an average percentage change of 0.4% (worsened AQI) compared to previous years: 2020 (30), 2021 (24), 2022 (29), 2023 (24), 2024 (22).
