Hillsboro, 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
Hillsboro, Oregon, United States
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
20th Aug 2023
111AQILowest AQI recorded on
5th Aug 2021
7AQISame Day Analysis (5th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 33 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
Hillsboro, Oregon, United States
AQI
Day
Night
.
5 AM5th Aug 2025
8 PM
4 AM6th Aug 2025
Day time
Avg. Highest Time
3PM5th Aug
50AQI
Avg. Lowest Time
10AM5th Aug
22AQI
Night time
Avg. Highest Time
9PM5th Aug
32AQI
Avg. Lowest Time
4AM6th Aug
18AQI
In the last 24 hours,
Hillsboro's AQI reached its highest point of 50 at 3 PM during the Day, while the lowest point, 18, was recorded at 4 AM during the Night between 5th Aug and 6th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Hillsboro, Oregon, 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 2025175 AMAQI
7th Jul 2025176 AMAQI
7th Jul 2025177 AMAQI
7th Jul 2025178 AMAQI
7th Jul 2025169 AMAQI
7th Jul 20251610 AMAQI
7th Jul 20251811 AMAQI
7th Jul 20252212 PMAQI
7th Jul 2025251 PMAQI
7th Jul 2025232 PMAQI
7th Jul 2025223 PMAQI
7th Jul 2025224 PMAQI
7th Jul 2025235 PMAQI
7th Jul 2025226 PMAQI
7th Jul 2025177 PMAQI
7th Jul 2025188 PMAQI
7th Jul 2025189 PMAQI
7th Jul 20251810 PMAQI
7th Jul 20252111 PMAQI
8th Jul 20252212 AMAQI
8th Jul 2025221 AMAQI
8th Jul 2025212 AMAQI
8th Jul 2025193 AMAQI
8th Jul 2025184 AMAQI
--°C/°C
8th Jul 2025205 AMAQI
8th Jul 2025236 AMAQI
8th Jul 2025227 AMAQI
8th Jul 2025228 AMAQI
8th Jul 2025219 AMAQI
8th Jul 20251910 AMAQI
8th Jul 20252311 AMAQI
8th Jul 20252812 PMAQI
8th Jul 2025311 PMAQI
8th Jul 2025302 PMAQI
8th Jul 2025283 PMAQI
8th Jul 2025254 PMAQI
8th Jul 2025225 PMAQI
8th Jul 2025246 PMAQI
8th Jul 2025227 PMAQI
8th Jul 2025228 PMAQI
8th Jul 2025209 PMAQI
8th Jul 20252010 PMAQI
8th Jul 20251811 PMAQI
9th Jul 20251712 AMAQI
9th Jul 2025161 AMAQI
9th Jul 2025142 AMAQI
9th Jul 2025163 AMAQI
9th Jul 2025144 AMAQI
22°C14/33°C
9th Jul 2025145 AMAQI
9th Jul 2025136 AMAQI
9th Jul 2025147 AMAQI
9th Jul 2025148 AMAQI
9th Jul 2025149 AMAQI
9th Jul 20251410 AMAQI
9th Jul 20251511 AMAQI
9th Jul 20251612 PMAQI
9th Jul 2025181 PMAQI
9th Jul 2025182 PMAQI
9th Jul 2025183 PMAQI
9th Jul 2025174 PMAQI
9th Jul 2025175 PMAQI
9th Jul 2025166 PMAQI
9th Jul 2025157 PMAQI
9th Jul 2025158 PMAQI
9th Jul 2025169 PMAQI
9th Jul 20251710 PMAQI
9th Jul 20251611 PMAQI
10th Jul 20251512 AMAQI
10th Jul 2025151 AMAQI
10th Jul 2025162 AMAQI
10th Jul 2025143 AMAQI
10th Jul 2025144 AMAQI
20°C16/25°C
10th Jul 2025135 AMAQI
10th Jul 2025136 AMAQI
10th Jul 2025147 AMAQI
10th Jul 2025138 AMAQI
10th Jul 2025159 AMAQI
10th Jul 20251410 AMAQI
10th Jul 20251311 AMAQI
10th Jul 20251312 PMAQI
10th Jul 2025121 PMAQI
10th Jul 2025132 PMAQI
10th Jul 2025133 PMAQI
10th Jul 2025144 PMAQI
10th Jul 2025145 PMAQI
10th Jul 2025146 PMAQI
10th Jul 2025147 PMAQI
10th Jul 2025148 PMAQI
10th Jul 2025149 PMAQI
10th Jul 20251410 PMAQI
10th Jul 20251511 PMAQI
11th Jul 20251412 AMAQI
11th Jul 2025141 AMAQI
11th Jul 2025152 AMAQI
11th Jul 2025163 AMAQI
11th Jul 2025154 AMAQI
19°C16/24°C
11th Jul 2025165 AMAQI
11th Jul 2025156 AMAQI
11th Jul 2025157 AMAQI
11th Jul 2025168 AMAQI
11th Jul 2025169 AMAQI
11th Jul 20251610 AMAQI
11th Jul 20251611 AMAQI
11th Jul 20251812 PMAQI
11th Jul 2025181 PMAQI
11th Jul 2025212 PMAQI
11th Jul 2025213 PMAQI
11th Jul 2025204 PMAQI
11th Jul 2025205 PMAQI
11th Jul 2025216 PMAQI
11th Jul 2025187 PMAQI
11th Jul 2025188 PMAQI
11th Jul 2025209 PMAQI
11th Jul 20252010 PMAQI
11th Jul 20252011 PMAQI
12th Jul 20251812 AMAQI
12th Jul 2025181 AMAQI
12th Jul 2025172 AMAQI
12th Jul 2025163 AMAQI
12th Jul 2025164 AMAQI
22°C15/32°C
12th Jul 2025155 AMAQI
12th Jul 2025156 AMAQI
12th Jul 2025177 AMAQI
12th Jul 2025188 AMAQI
12th Jul 2025179 AMAQI
12th Jul 20251810 AMAQI
12th Jul 20251711 AMAQI
12th Jul 20251512 PMAQI
12th Jul 2025161 PMAQI
12th Jul 2025232 PMAQI
12th Jul 2025223 PMAQI
12th Jul 2025194 PMAQI
12th Jul 2025205 PMAQI
12th Jul 2025186 PMAQI
12th Jul 2025187 PMAQI
12th Jul 2025198 PMAQI
12th Jul 2025219 PMAQI
12th Jul 20251910 PMAQI
12th Jul 20251911 PMAQI
13th Jul 20252012 AMAQI
13th Jul 2025171 AMAQI
13th Jul 2025172 AMAQI
13th Jul 2025183 AMAQI
13th Jul 2025154 AMAQI
22°C16/31°C
13th Jul 2025175 AMAQI
13th Jul 2025186 AMAQI
13th Jul 2025237 AMAQI
13th Jul 2025258 AMAQI
13th Jul 2025209 AMAQI
13th Jul 20251810 AMAQI
13th Jul 20252511 AMAQI
13th Jul 20252612 PMAQI
13th Jul 2025271 PMAQI
13th Jul 2025262 PMAQI
13th Jul 2025243 PMAQI
13th Jul 2025224 PMAQI
13th Jul 2025225 PMAQI
13th Jul 2025186 PMAQI
13th Jul 2025207 PMAQI
13th Jul 2025188 PMAQI
13th Jul 2025179 PMAQI
13th Jul 20251610 PMAQI
13th Jul 20251811 PMAQI
14th Jul 20251812 AMAQI
14th Jul 2025161 AMAQI
14th Jul 2025152 AMAQI
14th Jul 2025163 AMAQI
14th Jul 2025154 AMAQI
25°C17/36°C
14th Jul 2025155 AMAQI
14th Jul 2025156 AMAQI
14th Jul 2025167 AMAQI
14th Jul 2025168 AMAQI
14th Jul 2025189 AMAQI
14th Jul 20251410 AMAQI
14th Jul 20251411 AMAQI
14th Jul 20251412 PMAQI
14th Jul 2025131 PMAQI
14th Jul 2025142 PMAQI
14th Jul 2025143 PMAQI
14th Jul 2025144 PMAQI
14th Jul 2025135 PMAQI
14th Jul 2025156 PMAQI
14th Jul 2025157 PMAQI
14th Jul 2025158 PMAQI
14th Jul 2025169 PMAQI
14th Jul 20251710 PMAQI
14th Jul 20251611 PMAQI
15th Jul 20251612 AMAQI
15th Jul 2025161 AMAQI
15th Jul 2025152 AMAQI
15th Jul 2025183 AMAQI
15th Jul 2025164 AMAQI
19°C14/28°C
15th Jul 2025185 AMAQI
15th Jul 2025236 AMAQI
15th Jul 2025197 AMAQI
15th Jul 2025198 AMAQI
15th Jul 2025199 AMAQI
15th Jul 20251710 AMAQI
15th Jul 20251811 AMAQI
15th Jul 20252412 PMAQI
15th Jul 2025281 PMAQI
15th Jul 2025322 PMAQI
15th Jul 2025243 PMAQI
15th Jul 2025204 PMAQI
15th Jul 2025205 PMAQI
15th Jul 2025206 PMAQI
15th Jul 2025207 PMAQI
15th Jul 2025228 PMAQI
15th Jul 2025289 PMAQI
15th Jul 20252910 PMAQI
15th Jul 20252611 PMAQI
16th Jul 20252412 AMAQI
16th Jul 2025201 AMAQI
16th Jul 2025212 AMAQI
16th Jul 2025203 AMAQI
16th Jul 2025234 AMAQI
23°C13/33°C
16th Jul 2025235 AMAQI
16th Jul 2025166 AMAQI
16th Jul 2025207 AMAQI
16th Jul 2025228 AMAQI
16th Jul 2025229 AMAQI
16th Jul 20253210 AMAQI
16th Jul 20253311 AMAQI
16th Jul 20253212 PMAQI
16th Jul 2025301 PMAQI
16th Jul 2025272 PMAQI
16th Jul 2025223 PMAQI
16th Jul 2025224 PMAQI
16th Jul 2025235 PMAQI
16th Jul 2025246 PMAQI
16th Jul 2025257 PMAQI
16th Jul 2025258 PMAQI
16th Jul 2025269 PMAQI
16th Jul 20252410 PMAQI
16th Jul 20252311 PMAQI
17th Jul 20252312 AMAQI
17th Jul 2025231 AMAQI
17th Jul 2025242 AMAQI
17th Jul 2025263 AMAQI
17th Jul 2025314 AMAQI
27°C20/36°C
17th Jul 2025275 AMAQI
17th Jul 2025336 AMAQI
17th Jul 2025327 AMAQI
17th Jul 2025348 AMAQI
17th Jul 2025369 AMAQI
17th Jul 20253610 AMAQI
17th Jul 20253011 AMAQI
17th Jul 20253412 PMAQI
17th Jul 2025341 PMAQI
17th Jul 2025332 PMAQI
17th Jul 2025343 PMAQI
17th Jul 2025334 PMAQI
17th Jul 2025345 PMAQI
17th Jul 2025346 PMAQI
17th Jul 2025347 PMAQI
17th Jul 2025348 PMAQI
17th Jul 2025329 PMAQI
17th Jul 20253110 PMAQI
17th Jul 20253011 PMAQI
18th Jul 20252812 AMAQI
18th Jul 2025271 AMAQI
18th Jul 2025272 AMAQI
18th Jul 2025303 AMAQI
18th Jul 2025304 AMAQI
22°C13/31°C
18th Jul 2025285 AMAQI
18th Jul 2025256 AMAQI
18th Jul 2025267 AMAQI
18th Jul 2025288 AMAQI
18th Jul 2025299 AMAQI
18th Jul 20253210 AMAQI
18th Jul 20253011 AMAQI
18th Jul 20253612 PMAQI
18th Jul 2025321 PMAQI
18th Jul 2025312 PMAQI
18th Jul 2025273 PMAQI
18th Jul 2025264 PMAQI
18th Jul 2025265 PMAQI
18th Jul 2025266 PMAQI
18th Jul 2025287 PMAQI
18th Jul 2025288 PMAQI
18th Jul 2025209 PMAQI
18th Jul 20252210 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025221 AMAQI
19th Jul 2025212 AMAQI
19th Jul 2025203 AMAQI
19th Jul 2025164 AMAQI
20°C14/28°C
19th Jul 2025155 AMAQI
19th Jul 2025166 AMAQI
19th Jul 2025177 AMAQI
19th Jul 2025178 AMAQI
19th Jul 2025189 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025311 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025213 PMAQI
19th Jul 2025184 PMAQI
19th Jul 2025185 PMAQI
19th Jul 2025186 PMAQI
19th Jul 2025187 PMAQI
19th Jul 2025198 PMAQI
19th Jul 2025229 PMAQI
19th Jul 20252010 PMAQI
19th Jul 20251911 PMAQI
20th Jul 20252012 AMAQI
20th Jul 2025191 AMAQI
20th Jul 2025182 AMAQI
20th Jul 2025163 AMAQI
20th Jul 2025144 AMAQI
19°C13/26°C
20th Jul 2025155 AMAQI
20th Jul 2025146 AMAQI
20th Jul 2025157 AMAQI
20th Jul 2025148 AMAQI
20th Jul 2025159 AMAQI
20th Jul 20251810 AMAQI
20th Jul 20251911 AMAQI
20th Jul 20252412 PMAQI
20th Jul 2025181 PMAQI
20th Jul 2025182 PMAQI
20th Jul 2025183 PMAQI
20th Jul 2025184 PMAQI
20th Jul 2025185 PMAQI
20th Jul 2025196 PMAQI
20th Jul 2025187 PMAQI
20th Jul 2025188 PMAQI
20th Jul 2025189 PMAQI
20th Jul 20251810 PMAQI
20th Jul 20252011 PMAQI
21st Jul 20252112 AMAQI
21st Jul 2025241 AMAQI
21st Jul 2025252 AMAQI
21st Jul 2025243 AMAQI
21st Jul 2025204 AMAQI
16°C12/22°C
21st Jul 2025185 AMAQI
21st Jul 2025246 AMAQI
21st Jul 2025237 AMAQI
21st Jul 2025218 AMAQI
21st Jul 2025199 AMAQI
21st Jul 20252010 AMAQI
21st Jul 20252811 AMAQI
21st Jul 20253312 PMAQI
21st Jul 2025301 PMAQI
21st Jul 2025232 PMAQI
21st Jul 2025203 PMAQI
21st Jul 2025204 PMAQI
21st Jul 2025215 PMAQI
21st Jul 2025216 PMAQI
21st Jul 2025217 PMAQI
21st Jul 2025228 PMAQI
21st Jul 2025219 PMAQI
21st Jul 20252110 PMAQI
21st Jul 20252211 PMAQI
22nd Jul 20252412 AMAQI
22nd Jul 2025221 AMAQI
22nd Jul 2025212 AMAQI
22nd Jul 2025203 AMAQI
22nd Jul 2025204 AMAQI
19°C15/23°C
22nd Jul 2025205 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025177 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20252010 AMAQI
22nd Jul 20252611 AMAQI
22nd Jul 20252412 PMAQI
22nd Jul 2025221 PMAQI
22nd Jul 2025202 PMAQI
22nd Jul 2025193 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025196 PMAQI
22nd Jul 2025217 PMAQI
22nd Jul 2025218 PMAQI
22nd Jul 2025239 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025201 AMAQI
23rd Jul 2025202 AMAQI
23rd Jul 2025213 AMAQI
23rd Jul 2025204 AMAQI
20°C13/29°C
23rd Jul 2025185 AMAQI
23rd Jul 2025146 AMAQI
23rd Jul 2025167 AMAQI
23rd Jul 2025168 AMAQI
23rd Jul 2025169 AMAQI
23rd Jul 20252110 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20253012 PMAQI
23rd Jul 2025301 PMAQI
23rd Jul 2025322 PMAQI
23rd Jul 2025223 PMAQI
23rd Jul 2025204 PMAQI
23rd Jul 2025195 PMAQI
23rd Jul 2025216 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025208 PMAQI
23rd Jul 2025189 PMAQI
23rd Jul 20251810 PMAQI
23rd Jul 20251911 PMAQI
24th Jul 20251712 AMAQI
24th Jul 2025171 AMAQI
24th Jul 2025172 AMAQI
24th Jul 2025163 AMAQI
24th Jul 2025144 AMAQI
22°C14/33°C
24th Jul 2025175 AMAQI
24th Jul 2025166 AMAQI
24th Jul 2025167 AMAQI
24th Jul 2025168 AMAQI
24th Jul 2025209 AMAQI
24th Jul 20252410 AMAQI
24th Jul 20253311 AMAQI
24th Jul 20252412 PMAQI
24th Jul 2025201 PMAQI
24th Jul 2025242 PMAQI
24th Jul 2025233 PMAQI
24th Jul 2025224 PMAQI
24th Jul 2025215 PMAQI
24th Jul 2025246 PMAQI
24th Jul 2025217 PMAQI
24th Jul 2025218 PMAQI
24th Jul 2025239 PMAQI
24th Jul 20252010 PMAQI
24th Jul 20251711 PMAQI
25th Jul 20251612 AMAQI
25th Jul 2025171 AMAQI
25th Jul 2025172 AMAQI
25th Jul 2025183 AMAQI
25th Jul 2025214 AMAQI
21°C15/30°C
25th Jul 2025165 AMAQI
25th Jul 2025206 AMAQI
25th Jul 2025207 AMAQI
25th Jul 2025208 AMAQI
25th Jul 2025199 AMAQI
25th Jul 20251510 AMAQI
25th Jul 20251611 AMAQI
25th Jul 20251612 PMAQI
25th Jul 2025181 PMAQI
25th Jul 2025192 PMAQI
25th Jul 2025203 PMAQI
25th Jul 2025214 PMAQI
25th Jul 2025205 PMAQI
25th Jul 2025176 PMAQI
25th Jul 2025187 PMAQI
25th Jul 2025198 PMAQI
25th Jul 2025199 PMAQI
25th Jul 20251810 PMAQI
25th Jul 20251711 PMAQI
26th Jul 20251712 AMAQI
26th Jul 2025161 AMAQI
26th Jul 2025162 AMAQI
26th Jul 2025163 AMAQI
26th Jul 2025134 AMAQI
17°C13/23°C
26th Jul 2025145 AMAQI
26th Jul 2025176 AMAQI
26th Jul 2025167 AMAQI
26th Jul 2025158 AMAQI
26th Jul 2025149 AMAQI
26th Jul 20251410 AMAQI
26th Jul 20251411 AMAQI
26th Jul 20251612 PMAQI
26th Jul 2025151 PMAQI
26th Jul 2025162 PMAQI
26th Jul 2025183 PMAQI
26th Jul 2025164 PMAQI
26th Jul 2025175 PMAQI
26th Jul 2025166 PMAQI
26th Jul 2025177 PMAQI
26th Jul 2025178 PMAQI
26th Jul 2025189 PMAQI
26th Jul 20252010 PMAQI
26th Jul 20251911 PMAQI
27th Jul 20251812 AMAQI
27th Jul 2025171 AMAQI
27th Jul 2025172 AMAQI
27th Jul 2025163 AMAQI
27th Jul 2025164 AMAQI
16°C11/20°C
27th Jul 2025205 AMAQI
27th Jul 2025176 AMAQI
27th Jul 2025177 AMAQI
27th Jul 2025178 AMAQI
27th Jul 2025199 AMAQI
27th Jul 20252310 AMAQI
27th Jul 20252311 AMAQI
27th Jul 20252312 PMAQI
27th Jul 2025231 PMAQI
27th Jul 2025212 PMAQI
27th Jul 2025243 PMAQI
27th Jul 2025244 PMAQI
27th Jul 2025235 PMAQI
27th Jul 2025196 PMAQI
27th Jul 2025207 PMAQI
27th Jul 2025188 PMAQI
27th Jul 2025199 PMAQI
27th Jul 20251810 PMAQI
27th Jul 20252111 PMAQI
28th Jul 20252212 AMAQI
28th Jul 2025201 AMAQI
28th Jul 2025182 AMAQI
28th Jul 2025193 AMAQI
28th Jul 2025224 AMAQI
19°C14/25°C
28th Jul 2025205 AMAQI
28th Jul 2025196 AMAQI
28th Jul 2025187 AMAQI
28th Jul 2025208 AMAQI
28th Jul 2025229 AMAQI
28th Jul 20251710 AMAQI
28th Jul 20252011 AMAQI
28th Jul 20252212 PMAQI
28th Jul 2025231 PMAQI
28th Jul 2025282 PMAQI
28th Jul 2025273 PMAQI
28th Jul 2025254 PMAQI
28th Jul 2025235 PMAQI
28th Jul 2025236 PMAQI
28th Jul 2025227 PMAQI
28th Jul 2025228 PMAQI
28th Jul 2025249 PMAQI
28th Jul 20252410 PMAQI
28th Jul 20252411 PMAQI
29th Jul 20252112 AMAQI
29th Jul 2025201 AMAQI
29th Jul 2025172 AMAQI
29th Jul 2025163 AMAQI
29th Jul 2025164 AMAQI
21°C12/31°C
29th Jul 2025185 AMAQI
29th Jul 2025156 AMAQI
29th Jul 2025177 AMAQI
29th Jul 2025178 AMAQI
29th Jul 2025179 AMAQI
29th Jul 20251710 AMAQI
29th Jul 20251711 AMAQI
29th Jul 20251812 PMAQI
29th Jul 2025241 PMAQI
29th Jul 2025222 PMAQI
29th Jul 2025213 PMAQI
29th Jul 2025224 PMAQI
29th Jul 2025215 PMAQI
29th Jul 2025226 PMAQI
29th Jul 2025207 PMAQI
29th Jul 2025198 PMAQI
29th Jul 2025209 PMAQI
29th Jul 20252010 PMAQI
29th Jul 20252011 PMAQI
30th Jul 20251812 AMAQI
30th Jul 2025181 AMAQI
30th Jul 2025202 AMAQI
30th Jul 2025203 AMAQI
30th Jul 2025184 AMAQI
23°C14/34°C
30th Jul 2025165 AMAQI
30th Jul 2025146 AMAQI
30th Jul 2025187 AMAQI
30th Jul 2025208 AMAQI
30th Jul 2025179 AMAQI
30th Jul 20251610 AMAQI
30th Jul 20251611 AMAQI
30th Jul 20251812 PMAQI
30th Jul 2025171 PMAQI
30th Jul 2025172 PMAQI
30th Jul 2025173 PMAQI
30th Jul 2025174 PMAQI
30th Jul 2025175 PMAQI
30th Jul 2025176 PMAQI
30th Jul 2025177 PMAQI
30th Jul 2025178 PMAQI
30th Jul 2025229 PMAQI
30th Jul 20252410 PMAQI
30th Jul 20252411 PMAQI
31st Jul 20252212 AMAQI
31st Jul 2025211 AMAQI
31st Jul 2025192 AMAQI
31st Jul 2025163 AMAQI
31st Jul 2025144 AMAQI
22°C15/32°C
31st Jul 2025145 AMAQI
31st Jul 2025166 AMAQI
31st Jul 2025217 AMAQI
31st Jul 2025208 AMAQI
31st Jul 2025209 AMAQI
31st Jul 20252310 AMAQI
31st Jul 20252511 AMAQI
31st Jul 20253012 PMAQI
31st Jul 2025311 PMAQI
31st Jul 2025262 PMAQI
31st Jul 2025243 PMAQI
31st Jul 2025224 PMAQI
31st Jul 2025215 PMAQI
31st Jul 2025226 PMAQI
31st Jul 2025267 PMAQI
31st Jul 2025228 PMAQI
31st Jul 2025209 PMAQI
31st Jul 20252410 PMAQI
31st Jul 20252311 PMAQI
1st Aug 20252012 AMAQI
1st Aug 2025191 AMAQI
1st Aug 2025182 AMAQI
1st Aug 2025183 AMAQI
1st Aug 2025194 AMAQI
21°C15/30°C
1st Aug 2025205 AMAQI
1st Aug 2025166 AMAQI
1st Aug 2025147 AMAQI
1st Aug 2025158 AMAQI
1st Aug 2025159 AMAQI
1st Aug 20251410 AMAQI
1st Aug 20251611 AMAQI
1st Aug 20251612 PMAQI
1st Aug 2025171 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 2025199 PMAQI
1st Aug 20252010 PMAQI
1st Aug 20251911 PMAQI
2nd Aug 20251812 AMAQI
2nd Aug 2025181 AMAQI
2nd Aug 2025162 AMAQI
2nd Aug 2025173 AMAQI
2nd Aug 2025194 AMAQI
21°C14/30°C
2nd Aug 2025175 AMAQI
2nd Aug 2025166 AMAQI
2nd Aug 2025147 AMAQI
2nd Aug 2025148 AMAQI
2nd Aug 2025149 AMAQI
2nd Aug 20251410 AMAQI
2nd Aug 20251411 AMAQI
2nd Aug 20251412 PMAQI
2nd Aug 2025131 PMAQI
2nd Aug 2025152 PMAQI
2nd Aug 2025153 PMAQI
2nd Aug 2025144 PMAQI
2nd Aug 2025145 PMAQI
2nd Aug 2025156 PMAQI
2nd Aug 2025177 PMAQI
2nd Aug 2025178 PMAQI
2nd Aug 2025189 PMAQI
2nd Aug 20252210 PMAQI
2nd Aug 20252011 PMAQI
3rd Aug 20252012 AMAQI
3rd Aug 2025191 AMAQI
3rd Aug 2025202 AMAQI
3rd Aug 2025213 AMAQI
3rd Aug 2025204 AMAQI
19°C16/23°C
3rd Aug 2025205 AMAQI
3rd Aug 2025186 AMAQI
3rd Aug 2025187 AMAQI
3rd Aug 2025188 AMAQI
3rd Aug 2025189 AMAQI
3rd Aug 20251710 AMAQI
3rd Aug 20251811 AMAQI
3rd Aug 20251612 PMAQI
3rd Aug 2025161 PMAQI
3rd Aug 2025182 PMAQI
3rd Aug 2025183 PMAQI
3rd Aug 2025204 PMAQI
3rd Aug 2025225 PMAQI
3rd Aug 2025216 PMAQI
3rd Aug 2025207 PMAQI
3rd Aug 2025228 PMAQI
3rd Aug 2025269 PMAQI
3rd Aug 20252210 PMAQI
3rd Aug 20252111 PMAQI
4th Aug 20252312 AMAQI
4th Aug 2025221 AMAQI
4th Aug 2025222 AMAQI
4th Aug 2025223 AMAQI
4th Aug 2025224 AMAQI
17°C12/22°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 20252111 AMAQI
4th Aug 20252512 PMAQI
4th Aug 2025271 PMAQI
4th Aug 2025272 PMAQI
4th Aug 2025263 PMAQI
4th Aug 2025264 PMAQI
4th Aug 2025315 PMAQI
4th Aug 2025326 PMAQI
4th Aug 2025217 PMAQI
4th Aug 2025298 PMAQI
4th Aug 2025359 PMAQI
4th Aug 20253810 PMAQI
4th Aug 20255011 PMAQI
5th Aug 20254912 AMAQI
5th Aug 2025421 AMAQI
5th Aug 2025342 AMAQI
5th Aug 2025333 AMAQI
5th Aug 2025304 AMAQI
18°C13/24°C
5th Aug 2025275 AMAQI
5th Aug 2025276 AMAQI
5th Aug 2025277 AMAQI
5th Aug 2025288 AMAQI
5th Aug 2025269 AMAQI
5th Aug 20252210 AMAQI
5th Aug 20252311 AMAQI
5th Aug 20252812 PMAQI
5th Aug 2025311 PMAQI
5th Aug 2025402 PMAQI
5th Aug 2025503 PMAQI
5th Aug 2025504 PMAQI
5th Aug 2025465 PMAQI
5th Aug 2025426 PMAQI
5th Aug 2025347 PMAQI
5th Aug 2025348 PMAQI
5th Aug 2025329 PMAQI
5th Aug 20252810 PMAQI
5th Aug 20252411 PMAQI
6th Aug 20252412 AMAQI
6th Aug 2025251 AMAQI
6th Aug 2025212 AMAQI
6th Aug 2025183 AMAQI
6th Aug 2025184 AMAQI
20°C13/26°C
6th Aug 2025185 AMAQI
5 AM6th Aug 2025186 AMAQI
6th Aug 2025187 AMAQI
6th Aug 2025198 AMAQI
6th Aug 2025209 AMAQI
6th Aug 20251910 AMAQI
6th Aug 20251911 AMAQI
6th Aug 20251812 PMAQI
12 PM6th Aug 2025211 PMAQI
6th Aug 2025182 PMAQI
6th Aug 2025183 PMAQI
6th Aug 2025194 PMAQI
6th Aug 2025225 PMAQI
6th Aug 2025196 PMAQI
6th Aug 2025187 PMAQI
6th Aug 2025168 PMAQI
8 PM6th Aug 2025159 PMAQI
6th Aug 20251510 PMAQI
12 AM
4 AM
18°C16/23°C
Day time
Avg. Highest Time
11 AM - 8 PM
22AQI
10 hours / Day
300 hours / Month
Avg. Lowest Time
5 AM - 6 AM
18AQI
2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 11 AM to 8 PM (Avg. 22), while the lowest AQI was between 5 AM to 6 AM (Avg. 18).
Night time
Avg. Highest Time
9 PM - 11 PM
21AQI
3 hours / Day
90 hours / Month
Avg. Lowest Time
2 AM - 4 AM
19AQI
3 hours / Day
90 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 21), while the lowest AQI was between 2 AM to 4 AM (Avg. 19).
2025 Days Vs Air Quality
Hillsboro, Oregon, United States
2025
98%
212
2%
5
Total number of days with different AQI categories in last 219 days in 2025 (146 days remaining)
Good
212 DaysModerate
5 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 219 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
Hillsboro, 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
31AQI
31AQI
2nd January 2025
28AQI
28AQI
3rd January 2025
21AQI
21AQI
4th January 2025
18AQI
18AQI
5th January 2025
20AQI
20AQI
6th January 2025
21AQI
21AQI
7th January 2025
24AQI
24AQI
8th January 2025
29AQI
29AQI
9th January 2025
31AQI
31AQI
10th January 2025
28AQI
28AQI
11th January 2025
23AQI
23AQI
12th January 2025
28AQI
28AQI
13th January 2025
36AQI
36AQI
14th January 2025
38AQI
38AQI
15th January 2025
40AQI
40AQI
16th January 2025
43AQI
43AQI
17th January 2025
38AQI
38AQI
18th January 2025
42AQI
42AQI
19th January 2025
47AQI
47AQI
20th January 2025
31AQI
31AQI
21st January 2025
51AQI
51AQI
22nd January 2025
52AQI
52AQI
23rd January 2025
53AQI
53AQI
24th January 2025
44AQI
44AQI
25th January 2025
31AQI
31AQI
26th January 2025
29AQI
29AQI
27th January 2025
39AQI
39AQI
28th January 2025
49AQI
49AQI
29th January 2025
57AQI
57AQI
30th January 2025
67AQI
67AQI
31st January 2025
41AQI
41AQI
1st February 2025
19AQI
19AQI
2nd February 2025
23AQI
23AQI
3rd February 2025
22AQI
22AQI
4th February 2025
34AQI
34AQI
5th February 2025
25AQI
25AQI
6th February 2025
24AQI
24AQI
7th February 2025
25AQI
25AQI
8th February 2025
25AQI
25AQI
9th February 2025
29AQI
29AQI
10th February 2025
27AQI
27AQI
11th February 2025
23AQI
23AQI
12th February 2025
25AQI
25AQI
13th February 2025
23AQI
23AQI
14th February 2025
26AQI
26AQI
15th February 2025
40AQI
40AQI
16th February 2025
31AQI
31AQI
17th February 2025
17AQI
17AQI
18th February 2025
20AQI
20AQI
19th February 2025
19AQI
19AQI
20th February 2025
19AQI
19AQI
21st February 2025
23AQI
23AQI
22nd February 2025
25AQI
25AQI
23rd February 2025
16AQI
16AQI
24th February 2025
20AQI
20AQI
25th February 2025
17AQI
17AQI
26th February 2025
25AQI
25AQI
27th February 2025
25AQI
25AQI
28th February 2025
32AQI
32AQI
1st March 2025
36AQI
36AQI
2nd March 2025
27AQI
27AQI
3rd March 2025
20AQI
20AQI
4th March 2025
21AQI
21AQI
5th March 2025
24AQI
24AQI
6th March 2025
19AQI
19AQI
7th March 2025
27AQI
27AQI
8th March 2025
33AQI
33AQI
9th March 2025
34AQI
34AQI
10th March 2025
22AQI
22AQI
11th March 2025
38AQI
38AQI
12th March 2025
19AQI
19AQI
13th March 2025
16AQI
16AQI
14th March 2025
17AQI
17AQI
15th March 2025
17AQI
17AQI
16th March 2025
19AQI
19AQI
17th March 2025
18AQI
18AQI
18th March 2025
16AQI
16AQI
19th March 2025
18AQI
18AQI
20th March 2025
14AQI
14AQI
21st March 2025
14AQI
14AQI
22nd March 2025
18AQI
18AQI
23rd March 2025
18AQI
18AQI
24th March 2025
17AQI
17AQI
25th March 2025
20AQI
20AQI
26th March 2025
21AQI
21AQI
27th March 2025
16AQI
16AQI
28th March 2025
16AQI
16AQI
29th March 2025
15AQI
15AQI
30th March 2025
22AQI
22AQI
31st March 2025
16AQI
16AQI
1st April 2025
18AQI
18AQI
2nd April 2025
17AQI
17AQI
3rd April 2025
18AQI
18AQI
4th April 2025
20AQI
20AQI
5th April 2025
24AQI
24AQI
6th April 2025
28AQI
28AQI
7th April 2025
15AQI
15AQI
8th April 2025
13AQI
13AQI
9th April 2025
17AQI
17AQI
10th April 2025
20AQI
20AQI
11th April 2025
16AQI
16AQI
12th April 2025
17AQI
17AQI
13th April 2025
18AQI
18AQI
14th April 2025
20AQI
20AQI
15th April 2025
23AQI
23AQI
16th April 2025
21AQI
21AQI
17th April 2025
20AQI
20AQI
18th April 2025
20AQI
20AQI
19th April 2025
20AQI
20AQI
20th April 2025
16AQI
16AQI
21st April 2025
13AQI
13AQI
22nd April 2025
14AQI
14AQI
23rd April 2025
15AQI
15AQI
24th April 2025
19AQI
19AQI
25th April 2025
24AQI
24AQI
26th April 2025
22AQI
22AQI
27th April 2025
19AQI
19AQI
28th April 2025
14AQI
14AQI
29th April 2025
14AQI
14AQI
30th April 2025
15AQI
15AQI
1st May 2025
19AQI
19AQI
2nd May 2025
21AQI
21AQI
3rd May 2025
13AQI
13AQI
4th May 2025
14AQI
14AQI
5th May 2025
13AQI
13AQI
6th May 2025
19AQI
19AQI
7th May 2025
17AQI
17AQI
8th May 2025
15AQI
15AQI
9th May 2025
17AQI
17AQI
10th May 2025
16AQI
16AQI
11th May 2025
14AQI
14AQI
12th May 2025
15AQI
15AQI
13th May 2025
16AQI
16AQI
14th May 2025
17AQI
17AQI
15th May 2025
17AQI
17AQI
16th May 2025
17AQI
17AQI
17th May 2025
14AQI
14AQI
18th May 2025
13AQI
13AQI
19th May 2025
15AQI
15AQI
20th May 2025
11AQI
11AQI
21st May 2025
12AQI
12AQI
22nd May 2025
13AQI
13AQI
23rd May 2025
12AQI
12AQI
24th May 2025
15AQI
15AQI
25th May 2025
14AQI
14AQI
26th May 2025
13AQI
13AQI
27th May 2025
14AQI
14AQI
28th May 2025
16AQI
16AQI
29th May 2025
13AQI
13AQI
30th May 2025
15AQI
15AQI
31st May 2025
15AQI
15AQI
1st June 2025
14AQI
14AQI
2nd June 2025
15AQI
15AQI
3rd June 2025
17AQI
17AQI
4th June 2025
14AQI
14AQI
5th June 2025
15AQI
15AQI
6th June 2025
16AQI
16AQI
7th June 2025
17AQI
17AQI
8th June 2025
23AQI
23AQI
9th June 2025
25AQI
25AQI
10th June 2025
22AQI
22AQI
11th June 2025
24AQI
24AQI
12th June 2025
22AQI
22AQI
13th June 2025
17AQI
17AQI
14th June 2025
17AQI
17AQI
15th June 2025
18AQI
18AQI
16th June 2025
18AQI
18AQI
17th June 2025
17AQI
17AQI
18th June 2025
14AQI
14AQI
19th June 2025
15AQI
15AQI
20th June 2025
14AQI
14AQI
21st June 2025
11AQI
11AQI
22nd June 2025
12AQI
12AQI
23rd June 2025
14AQI
14AQI
24th June 2025
22AQI
22AQI
25th June 2025
24AQI
24AQI
26th June 2025
16AQI
16AQI
27th June 2025
15AQI
15AQI
28th June 2025
14AQI
14AQI
29th June 2025
17AQI
17AQI
30th June 2025
22AQI
22AQI
1st July 2025
19AQI
19AQI
2nd July 2025
16AQI
16AQI
3rd July 2025
14AQI
14AQI
4th July 2025
16AQI
16AQI
5th July 2025
19AQI
19AQI
6th July 2025
16AQI
16AQI
7th July 2025
19AQI
19AQI
8th July 2025
22AQI
22AQI
9th July 2025
15AQI
15AQI
10th July 2025
14AQI
14AQI
11th July 2025
17AQI
17AQI
12th July 2025
18AQI
18AQI
13th July 2025
19AQI
19AQI
14th July 2025
15AQI
15AQI
15th July 2025
21AQI
21AQI
16th July 2025
24AQI
24AQI
17th July 2025
31AQI
31AQI
18th July 2025
27AQI
27AQI
19th July 2025
20AQI
20AQI
20th July 2025
18AQI
18AQI
21st July 2025
23AQI
23AQI
22nd July 2025
21AQI
21AQI
23rd July 2025
21AQI
21AQI
24th July 2025
20AQI
20AQI
25th July 2025
18AQI
18AQI
26th July 2025
16AQI
16AQI
27th July 2025
19AQI
19AQI
28th July 2025
22AQI
22AQI
29th July 2025
19AQI
19AQI
30th July 2025
18AQI
18AQI
31st July 2025
21AQI
21AQI
1st August 2025
18AQI
18AQI
2nd August 2025
16AQI
16AQI
3rd August 2025
20AQI
20AQI
4th August 2025
26AQI
26AQI
5th August 2025
33AQI
33AQI
36AQI
24AQI
21AQI
18AQI
15AQI
17AQI
19AQI
23AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202522AQI
26
5
28
31
30
31
30
31
5
212
5
Highest AQI recorded in
January36AQI
Lowest AQI recorded in
May15AQI
202421AQI
30
1
27
31
30
31
29
31
31
27
3
31
27
3
29
2
354
9
Highest AQI recorded in
December32AQI
Lowest AQI recorded in
June13AQI
202325AQI
30
1
21
7
31
30
31
30
31
24
6
1
30
29
2
20
8
29
2
336
26
1
Highest AQI recorded in
November41AQI
Lowest AQI recorded in
April15AQI
202229AQI
25
5
20
2
30
1
25
31
30
23
1
26
2
1
18
11
2
19
11
25
6
273
38
3
Highest AQI recorded in
October54AQI
Lowest AQI recorded in
June14AQI
202123AQI
25
5
28
28
3
30
31
30
31
30
1
30
29
2
26
4
31
349
15
Highest AQI recorded in
January33AQI
Lowest AQI recorded in
May14AQI
202032AQI
13
20
18
30
31
31
19
3
1
6
1
26
5
24
6
25
6
237
20
1
6
1
Highest AQI recorded in
September87AQI
Lowest AQI recorded in
June13AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2020(Avg.)
32AQILeast Polluted Year Recorded
2024(Avg.)
21AQIHillsboro's annual 2025 AQI (22) shows an average percentage change of -13.9% (improved AQI) compared to previous years: 2020 (32), 2021 (23), 2022 (29), 2023 (25), 2024 (21).
