Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Hermiston, 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

Hermiston, Oregon, United States

2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
21st Aug 2023
250AQI
Lowest AQI recorded on
10th Aug 2023
13AQI

Same Day Analysis (31st August):
On this day, AQI across the 4 years varied significantly: 2026 ranks 1st highest AQI at 55 of Moderate air quality on the same day.

Day & Night AQI Trend: 31st Jul - 1st Aug 2026

Hermiston, Oregon, United States

AQI
Day
Night
.

5 AM31st Jul 2026

8 PM

4 AM1st Aug 2026

Day time
Avg. Highest Time
10AM31st Jul

85AQI

Avg. Lowest Time
6PM31st Jul

54AQI

Night time
Avg. Highest Time
10PM31st Jul

78AQI

Avg. Lowest Time
3AM1st Aug

46AQI

In the last 24 hours,

Hermiston's AQI reached its highest point of 85 at 10 AM during the Day, while the lowest point, 46, was recorded at 3 AM during the Night between 31st Jul and 1st Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Hermiston, Oregon, United States

JulAug
03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st
Day
Night
3rd Jul 2026185 AMAQI
3rd Jul 2026126 AMAQI
3rd Jul 2026107 AMAQI
3rd Jul 2026108 AMAQI
3rd Jul 2026389 AMAQI
3rd Jul 20264010 AMAQI
3rd Jul 20262411 AMAQI
3rd Jul 20261612 PMAQI
3rd Jul 2026121 PMAQI
3rd Jul 2026102 PMAQI
3rd Jul 2026103 PMAQI
3rd Jul 2026144 PMAQI
3rd Jul 2026205 PMAQI
3rd Jul 2026106 PMAQI
3rd Jul 202697 PMAQI
3rd Jul 2026268 PMAQI
3rd Jul 2026269 PMAQI
3rd Jul 20261010 PMAQI
3rd Jul 20261411 PMAQI
4th Jul 20262612 AMAQI
4th Jul 2026301 AMAQI
4th Jul 2026422 AMAQI
4th Jul 2026183 AMAQI
4th Jul 2026124 AMAQI

24°C15/33°C

4th Jul 2026165 AMAQI
4th Jul 2026126 AMAQI
4th Jul 2026127 AMAQI
4th Jul 2026128 AMAQI
4th Jul 2026109 AMAQI
4th Jul 20262410 AMAQI
4th Jul 20262711 AMAQI
4th Jul 20262612 PMAQI
4th Jul 2026261 PMAQI
4th Jul 2026262 PMAQI
4th Jul 2026243 PMAQI
4th Jul 2026244 PMAQI
4th Jul 2026205 PMAQI
4th Jul 2026216 PMAQI
4th Jul 2026207 PMAQI
4th Jul 2026208 PMAQI
4th Jul 2026209 PMAQI
4th Jul 20261410 PMAQI
4th Jul 20261411 PMAQI
5th Jul 20264612 AMAQI
5th Jul 2026421 AMAQI
5th Jul 2026262 AMAQI
5th Jul 2026203 AMAQI
5th Jul 2026124 AMAQI

26°C16/35°C

5th Jul 2026125 AMAQI
5th Jul 2026126 AMAQI
5th Jul 2026137 AMAQI
5th Jul 2026128 AMAQI
5th Jul 2026109 AMAQI
5th Jul 20261110 AMAQI
5th Jul 20261011 AMAQI
5th Jul 20261012 PMAQI
5th Jul 2026121 PMAQI
5th Jul 2026102 PMAQI
5th Jul 2026263 PMAQI
5th Jul 2026264 PMAQI
5th Jul 2026225 PMAQI
5th Jul 2026226 PMAQI
5th Jul 2026207 PMAQI
5th Jul 202698 PMAQI
5th Jul 202699 PMAQI
5th Jul 20261210 PMAQI
5th Jul 20262011 PMAQI
6th Jul 20262612 AMAQI
6th Jul 2026291 AMAQI
6th Jul 2026262 AMAQI
6th Jul 2026263 AMAQI
6th Jul 2026244 AMAQI

25°C16/34°C

6th Jul 2026205 AMAQI
6th Jul 2026206 AMAQI
6th Jul 2026207 AMAQI
6th Jul 2026278 AMAQI
6th Jul 2026299 AMAQI
6th Jul 20263010 AMAQI
6th Jul 20263111 AMAQI
6th Jul 20262712 PMAQI
6th Jul 2026241 PMAQI
6th Jul 2026222 PMAQI
6th Jul 2026213 PMAQI
6th Jul 2026204 PMAQI
6th Jul 2026165 PMAQI
6th Jul 2026126 PMAQI
6th Jul 2026367 PMAQI
6th Jul 2026328 PMAQI
6th Jul 2026339 PMAQI
6th Jul 20263010 PMAQI
6th Jul 20262411 PMAQI
7th Jul 20262012 AMAQI
7th Jul 2026281 AMAQI
7th Jul 2026212 AMAQI
7th Jul 2026183 AMAQI
7th Jul 2026184 AMAQI

24°C12/35°C

7th Jul 2026205 AMAQI
7th Jul 2026246 AMAQI
7th Jul 2026267 AMAQI
7th Jul 2026268 AMAQI
7th Jul 2026299 AMAQI
7th Jul 20263410 AMAQI
7th Jul 20263011 AMAQI
7th Jul 20262812 PMAQI
7th Jul 2026241 PMAQI
7th Jul 2026222 PMAQI
7th Jul 2026203 PMAQI
7th Jul 2026174 PMAQI
7th Jul 2026165 PMAQI
7th Jul 2026146 PMAQI
7th Jul 2026147 PMAQI
7th Jul 2026148 PMAQI
7th Jul 2026159 PMAQI
7th Jul 20262010 PMAQI
7th Jul 20262211 PMAQI
8th Jul 20262412 AMAQI
8th Jul 2026221 AMAQI
8th Jul 2026212 AMAQI
8th Jul 2026253 AMAQI
8th Jul 2026224 AMAQI

27°C14/38°C

8th Jul 2026205 AMAQI
8th Jul 2026196 AMAQI
8th Jul 2026187 AMAQI
8th Jul 2026188 AMAQI
8th Jul 2026149 AMAQI
8th Jul 20261610 AMAQI
8th Jul 20261611 AMAQI
8th Jul 20261812 PMAQI
8th Jul 2026221 PMAQI
8th Jul 2026242 PMAQI
8th Jul 2026403 PMAQI
8th Jul 2026324 PMAQI
8th Jul 2026245 PMAQI
8th Jul 2026206 PMAQI
8th Jul 2026147 PMAQI
8th Jul 2026118 PMAQI
8th Jul 2026129 PMAQI
8th Jul 20261210 PMAQI
8th Jul 20261811 PMAQI
9th Jul 20261612 AMAQI
9th Jul 2026171 AMAQI
9th Jul 2026192 AMAQI
9th Jul 2026203 AMAQI
9th Jul 2026184 AMAQI

27°C20/35°C

9th Jul 2026185 AMAQI
9th Jul 2026166 AMAQI
9th Jul 2026167 AMAQI
9th Jul 2026148 AMAQI
9th Jul 2026229 AMAQI
9th Jul 20262010 AMAQI
9th Jul 20261211 AMAQI
9th Jul 2026912 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026302 PMAQI
9th Jul 2026243 PMAQI
9th Jul 2026194 PMAQI
9th Jul 2026145 PMAQI
9th Jul 2026166 PMAQI
9th Jul 2026167 PMAQI
9th Jul 2026188 PMAQI
9th Jul 2026169 PMAQI
9th Jul 20261710 PMAQI
9th Jul 20261811 PMAQI
10th Jul 20261612 AMAQI
10th Jul 2026151 AMAQI
10th Jul 2026172 AMAQI
10th Jul 2026183 AMAQI
10th Jul 2026174 AMAQI

26°C17/35°C

10th Jul 2026165 AMAQI
10th Jul 2026136 AMAQI
10th Jul 2026127 AMAQI
10th Jul 2026148 AMAQI
10th Jul 2026269 AMAQI
10th Jul 20263210 AMAQI
10th Jul 20262611 AMAQI
10th Jul 20262812 PMAQI
10th Jul 2026281 PMAQI
10th Jul 2026232 PMAQI
10th Jul 2026203 PMAQI
10th Jul 2026164 PMAQI
10th Jul 2026175 PMAQI
10th Jul 2026216 PMAQI
10th Jul 2026267 PMAQI
10th Jul 2026188 PMAQI
10th Jul 2026389 PMAQI
10th Jul 20266310 PMAQI
10th Jul 20264611 PMAQI
11th Jul 202615312 AMAQI
11th Jul 20261241 AMAQI
11th Jul 2026702 AMAQI
11th Jul 2026563 AMAQI
11th Jul 2026364 AMAQI

27°C17/36°C

11th Jul 2026265 AMAQI
11th Jul 2026186 AMAQI
11th Jul 2026157 AMAQI
11th Jul 2026148 AMAQI
11th Jul 2026219 AMAQI
11th Jul 20262610 AMAQI
11th Jul 20262011 AMAQI
11th Jul 20262412 PMAQI
11th Jul 2026381 PMAQI
11th Jul 2026442 PMAQI
11th Jul 2026313 PMAQI
11th Jul 2026404 PMAQI
11th Jul 2026445 PMAQI
11th Jul 2026306 PMAQI
11th Jul 2026207 PMAQI
11th Jul 2026138 PMAQI
11th Jul 2026119 PMAQI
11th Jul 20261210 PMAQI
11th Jul 20261411 PMAQI
12th Jul 20261412 AMAQI
12th Jul 2026121 AMAQI
12th Jul 202682 AMAQI
12th Jul 2026303 AMAQI
12th Jul 2026324 AMAQI

26°C19/34°C

12th Jul 2026325 AMAQI
12th Jul 2026316 AMAQI
12th Jul 2026307 AMAQI
12th Jul 2026308 AMAQI
12th Jul 2026339 AMAQI
12th Jul 20263210 AMAQI
12th Jul 20263011 AMAQI
12th Jul 20262812 PMAQI
12th Jul 2026301 PMAQI
12th Jul 2026282 PMAQI
12th Jul 2026293 PMAQI
12th Jul 2026304 PMAQI
12th Jul 2026305 PMAQI
12th Jul 2026306 PMAQI
12th Jul 2026287 PMAQI
12th Jul 2026118 PMAQI
12th Jul 2026109 PMAQI
12th Jul 20261010 PMAQI
12th Jul 20261011 PMAQI
13th Jul 20261012 AMAQI
13th Jul 2026101 AMAQI
13th Jul 2026322 AMAQI
13th Jul 2026103 AMAQI
13th Jul 2026104 AMAQI

24°C19/32°C

13th Jul 2026105 AMAQI
13th Jul 2026226 AMAQI
13th Jul 2026207 AMAQI
13th Jul 2026188 AMAQI
13th Jul 2026209 AMAQI
13th Jul 20261610 AMAQI
13th Jul 20261411 AMAQI
13th Jul 20261012 PMAQI
13th Jul 202681 PMAQI
13th Jul 2026322 PMAQI
13th Jul 2026343 PMAQI
13th Jul 2026284 PMAQI
13th Jul 2026345 PMAQI
13th Jul 2026346 PMAQI
13th Jul 2026227 PMAQI
13th Jul 2026168 PMAQI
13th Jul 2026209 PMAQI
13th Jul 20263010 PMAQI
13th Jul 20263211 PMAQI
14th Jul 20263412 AMAQI
14th Jul 2026341 AMAQI
14th Jul 2026362 AMAQI
14th Jul 2026333 AMAQI
14th Jul 2026284 AMAQI

26°C14/36°C

14th Jul 2026265 AMAQI
14th Jul 2026286 AMAQI
14th Jul 2026327 AMAQI
14th Jul 2026388 AMAQI
14th Jul 2026309 AMAQI
14th Jul 20264110 AMAQI
14th Jul 20264011 AMAQI
14th Jul 20263612 PMAQI
14th Jul 2026311 PMAQI
14th Jul 2026282 PMAQI
14th Jul 2026303 PMAQI
14th Jul 2026284 PMAQI
14th Jul 2026245 PMAQI
14th Jul 2026226 PMAQI
14th Jul 2026227 PMAQI
14th Jul 2026298 PMAQI
14th Jul 2026289 PMAQI
14th Jul 20263210 PMAQI
14th Jul 20263311 PMAQI
15th Jul 20263012 AMAQI
15th Jul 2026281 AMAQI
15th Jul 2026222 AMAQI
15th Jul 2026193 AMAQI
15th Jul 2026174 AMAQI

29°C20/37°C

15th Jul 2026425 AMAQI
15th Jul 2026326 AMAQI
15th Jul 2026307 AMAQI
15th Jul 2026288 AMAQI
15th Jul 2026289 AMAQI
15th Jul 20262610 AMAQI
15th Jul 20262211 AMAQI
15th Jul 20261912 PMAQI
15th Jul 2026231 PMAQI
15th Jul 2026242 PMAQI
15th Jul 2026233 PMAQI
15th Jul 2026304 PMAQI
15th Jul 2026305 PMAQI
15th Jul 2026326 PMAQI
15th Jul 2026327 PMAQI
15th Jul 2026328 PMAQI
15th Jul 2026309 PMAQI
15th Jul 20269610 PMAQI
15th Jul 202610611 PMAQI
16th Jul 20267412 AMAQI
16th Jul 2026641 AMAQI
16th Jul 2026362 AMAQI
16th Jul 2026223 AMAQI
16th Jul 2026254 AMAQI

30°C21/39°C

16th Jul 2026295 AMAQI
16th Jul 2026226 AMAQI
16th Jul 2026247 AMAQI
16th Jul 2026228 AMAQI
16th Jul 2026209 AMAQI
16th Jul 20262010 AMAQI
16th Jul 20262011 AMAQI
16th Jul 20262412 PMAQI
16th Jul 2026301 PMAQI
16th Jul 2026342 PMAQI
16th Jul 2026443 PMAQI
16th Jul 2026524 PMAQI
16th Jul 2026505 PMAQI
16th Jul 2026506 PMAQI
16th Jul 2026447 PMAQI
16th Jul 2026368 PMAQI
16th Jul 2026489 PMAQI
16th Jul 202611910 PMAQI
16th Jul 20268811 PMAQI
17th Jul 20269112 AMAQI
17th Jul 2026921 AMAQI
17th Jul 20261462 AMAQI
17th Jul 20262093 AMAQI
17th Jul 20261874 AMAQI

29°C21/38°C

17th Jul 20261415 AMAQI
17th Jul 20261186 AMAQI
17th Jul 20261087 AMAQI
17th Jul 2026758 AMAQI
17th Jul 2026669 AMAQI
17th Jul 20267210 AMAQI
17th Jul 20266611 AMAQI
17th Jul 20265812 PMAQI
17th Jul 2026741 PMAQI
17th Jul 2026662 PMAQI
17th Jul 2026583 PMAQI
17th Jul 2026664 PMAQI
17th Jul 2026605 PMAQI
17th Jul 2026666 PMAQI
17th Jul 2026827 PMAQI
17th Jul 2026578 PMAQI
17th Jul 2026429 PMAQI
17th Jul 20267210 PMAQI
17th Jul 20266411 PMAQI
18th Jul 20265112 AMAQI
18th Jul 2026481 AMAQI
18th Jul 2026532 AMAQI
18th Jul 2026533 AMAQI
18th Jul 2026584 AMAQI

26°C17/35°C

18th Jul 2026585 AMAQI
18th Jul 2026506 AMAQI
18th Jul 2026467 AMAQI
18th Jul 2026558 AMAQI
18th Jul 2026579 AMAQI
18th Jul 20264710 AMAQI
18th Jul 20264311 AMAQI
18th Jul 20265212 PMAQI
18th Jul 2026541 PMAQI
18th Jul 2026542 PMAQI
18th Jul 2026463 PMAQI
18th Jul 2026384 PMAQI
18th Jul 2026645 PMAQI
18th Jul 2026606 PMAQI
18th Jul 2026387 PMAQI
18th Jul 2026588 PMAQI
18th Jul 2026649 PMAQI
18th Jul 20268610 PMAQI
18th Jul 20266211 PMAQI
19th Jul 20265112 AMAQI
19th Jul 2026481 AMAQI
19th Jul 2026292 AMAQI
19th Jul 2026313 AMAQI
19th Jul 2026384 AMAQI

26°C17/35°C

19th Jul 2026425 AMAQI
19th Jul 2026386 AMAQI
19th Jul 2026397 AMAQI
19th Jul 2026428 AMAQI
19th Jul 2026519 AMAQI
19th Jul 20264410 AMAQI
19th Jul 20264611 AMAQI
19th Jul 20264212 PMAQI
19th Jul 2026451 PMAQI
19th Jul 2026402 PMAQI
19th Jul 2026373 PMAQI
19th Jul 2026434 PMAQI
19th Jul 2026425 PMAQI
19th Jul 2026426 PMAQI
19th Jul 2026447 PMAQI
19th Jul 2026448 PMAQI
19th Jul 2026499 PMAQI
19th Jul 20265610 PMAQI
19th Jul 20265411 PMAQI
20th Jul 20266412 AMAQI
20th Jul 2026541 AMAQI
20th Jul 2026532 AMAQI
20th Jul 2026573 AMAQI
20th Jul 2026644 AMAQI

26°C16/35°C

20th Jul 2026515 AMAQI
20th Jul 2026726 AMAQI
20th Jul 2026427 AMAQI
20th Jul 2026538 AMAQI
20th Jul 2026709 AMAQI
20th Jul 20267010 AMAQI
20th Jul 20266511 AMAQI
20th Jul 20265712 PMAQI
20th Jul 2026631 PMAQI
20th Jul 2026662 PMAQI
20th Jul 2026643 PMAQI
20th Jul 2026704 PMAQI
20th Jul 2026785 PMAQI
20th Jul 2026806 PMAQI
20th Jul 2026787 PMAQI
20th Jul 2026749 PMAQI
20th Jul 20268110 PMAQI
20th Jul 20267911 PMAQI
21st Jul 20268312 AMAQI
21st Jul 2026851 AMAQI
21st Jul 2026782 AMAQI
21st Jul 2026763 AMAQI
21st Jul 2026764 AMAQI

25°C17/32°C

21st Jul 2026765 AMAQI
21st Jul 2026876 AMAQI
21st Jul 2026907 AMAQI
21st Jul 2026988 AMAQI
21st Jul 20261039 AMAQI
21st Jul 202611010 AMAQI
21st Jul 202610011 AMAQI
21st Jul 20269012 PMAQI
21st Jul 2026771 PMAQI
21st Jul 2026742 PMAQI
21st Jul 2026703 PMAQI
21st Jul 2026714 PMAQI
21st Jul 2026715 PMAQI
21st Jul 2026746 PMAQI
21st Jul 2026797 PMAQI
21st Jul 2026788 PMAQI
21st Jul 2026829 PMAQI
21st Jul 20267810 PMAQI
21st Jul 20268011 PMAQI
22nd Jul 20268212 AMAQI
22nd Jul 2026801 AMAQI
22nd Jul 2026842 AMAQI
22nd Jul 2026803 AMAQI
22nd Jul 2026804 AMAQI

27°C15/38°C

22nd Jul 2026845 AMAQI
22nd Jul 2026886 AMAQI
22nd Jul 2026837 AMAQI
22nd Jul 2026848 AMAQI
22nd Jul 2026869 AMAQI
22nd Jul 20268510 AMAQI
22nd Jul 20268411 AMAQI
22nd Jul 20268312 PMAQI
22nd Jul 2026881 PMAQI
22nd Jul 2026892 PMAQI
22nd Jul 2026983 PMAQI
22nd Jul 2026984 PMAQI
22nd Jul 20261025 PMAQI
22nd Jul 20261036 PMAQI
22nd Jul 2026997 PMAQI
22nd Jul 20261018 PMAQI
22nd Jul 20261029 PMAQI
22nd Jul 202610410 PMAQI
22nd Jul 20269811 PMAQI
23rd Jul 202610012 AMAQI
23rd Jul 20261071 AMAQI
23rd Jul 20261032 AMAQI
23rd Jul 2026963 AMAQI
23rd Jul 2026804 AMAQI

31°C19/42°C

23rd Jul 2026755 AMAQI
23rd Jul 2026726 AMAQI
23rd Jul 2026737 AMAQI
23rd Jul 2026708 AMAQI
23rd Jul 2026719 AMAQI
23rd Jul 20266010 AMAQI
23rd Jul 20265411 AMAQI
23rd Jul 20265112 PMAQI
23rd Jul 2026531 PMAQI
23rd Jul 2026532 PMAQI
23rd Jul 2026593 PMAQI
23rd Jul 2026754 PMAQI
23rd Jul 2026985 PMAQI
23rd Jul 2026996 PMAQI
23rd Jul 2026987 PMAQI
23rd Jul 2026888 PMAQI
23rd Jul 2026869 PMAQI
23rd Jul 20268210 PMAQI
23rd Jul 20269211 PMAQI
24th Jul 20268012 AMAQI
24th Jul 2026741 AMAQI
24th Jul 2026662 AMAQI
24th Jul 2026623 AMAQI
24th Jul 2026544 AMAQI

30°C22/38°C

24th Jul 2026485 AMAQI
24th Jul 2026466 AMAQI
24th Jul 2026427 AMAQI
24th Jul 2026428 AMAQI
24th Jul 2026429 AMAQI
24th Jul 20264910 AMAQI
24th Jul 20264211 AMAQI
24th Jul 20263812 PMAQI
24th Jul 2026671 PMAQI
24th Jul 2026562 PMAQI
24th Jul 2026563 PMAQI
24th Jul 2026484 PMAQI
24th Jul 2026645 PMAQI
24th Jul 2026566 PMAQI
24th Jul 2026587 PMAQI
24th Jul 2026598 PMAQI
24th Jul 2026679 PMAQI
24th Jul 20267010 PMAQI
24th Jul 20266611 PMAQI
25th Jul 20268412 AMAQI
25th Jul 2026911 AMAQI
25th Jul 2026922 AMAQI
25th Jul 2026803 AMAQI
25th Jul 2026734 AMAQI

29°C19/39°C

25th Jul 2026655 AMAQI
25th Jul 2026576 AMAQI
25th Jul 2026587 AMAQI
25th Jul 2026668 AMAQI
25th Jul 2026709 AMAQI
25th Jul 20267810 AMAQI
25th Jul 20266511 AMAQI
25th Jul 20265412 PMAQI
25th Jul 2026641 PMAQI
25th Jul 2026702 PMAQI
25th Jul 2026543 PMAQI
25th Jul 2026584 PMAQI
25th Jul 2026585 PMAQI
25th Jul 2026536 PMAQI
25th Jul 2026537 PMAQI
25th Jul 2026788 PMAQI
25th Jul 2026729 PMAQI
25th Jul 20266210 PMAQI
25th Jul 20265311 PMAQI
26th Jul 20265612 AMAQI
26th Jul 2026571 AMAQI
26th Jul 2026542 AMAQI
26th Jul 2026383 AMAQI
26th Jul 2026504 AMAQI

27°C20/35°C

26th Jul 2026465 AMAQI
26th Jul 2026446 AMAQI
26th Jul 2026447 AMAQI
26th Jul 2026518 AMAQI
26th Jul 2026389 AMAQI
26th Jul 20267010 AMAQI
26th Jul 20264811 AMAQI
26th Jul 20265712 PMAQI
26th Jul 2026641 PMAQI
26th Jul 2026662 PMAQI
26th Jul 2026703 PMAQI
26th Jul 2026744 PMAQI
26th Jul 2026705 PMAQI
26th Jul 2026616 PMAQI
26th Jul 2026647 PMAQI
26th Jul 2026688 PMAQI
26th Jul 2026519 PMAQI
26th Jul 20269210 PMAQI
26th Jul 20268511 PMAQI
27th Jul 20267612 AMAQI
27th Jul 2026711 AMAQI
27th Jul 2026572 AMAQI
27th Jul 2026593 AMAQI
27th Jul 2026524 AMAQI

24°C15/33°C

27th Jul 2026565 AMAQI
27th Jul 2026506 AMAQI
27th Jul 2026497 AMAQI
27th Jul 2026508 AMAQI
27th Jul 2026479 AMAQI
27th Jul 20265210 AMAQI
27th Jul 20264211 AMAQI
27th Jul 20263712 PMAQI
27th Jul 2026551 PMAQI
27th Jul 2026602 PMAQI
27th Jul 2026623 PMAQI
27th Jul 2026704 PMAQI
27th Jul 2026905 PMAQI
27th Jul 20261086 PMAQI
27th Jul 20261277 PMAQI
27th Jul 20261468 PMAQI
27th Jul 20261369 PMAQI
27th Jul 202614310 PMAQI
27th Jul 202612611 PMAQI
28th Jul 202610712 AMAQI
28th Jul 2026761 AMAQI
28th Jul 2026552 AMAQI
28th Jul 2026513 AMAQI
28th Jul 2026684 AMAQI

25°C15/35°C

28th Jul 2026625 AMAQI
28th Jul 2026596 AMAQI
28th Jul 2026667 AMAQI
28th Jul 2026728 AMAQI
28th Jul 2026759 AMAQI
28th Jul 20266610 AMAQI
28th Jul 20266811 AMAQI
28th Jul 20264612 PMAQI
28th Jul 2026631 PMAQI
28th Jul 2026712 PMAQI
28th Jul 2026693 PMAQI
28th Jul 2026854 PMAQI
28th Jul 2026805 PMAQI
28th Jul 2026766 PMAQI
28th Jul 2026567 PMAQI
28th Jul 2026898 PMAQI
28th Jul 2026779 PMAQI
28th Jul 20266410 PMAQI
28th Jul 20266811 PMAQI
29th Jul 20265412 AMAQI
29th Jul 2026521 AMAQI
29th Jul 2026382 AMAQI
29th Jul 2026423 AMAQI
29th Jul 2026564 AMAQI

26°C18/34°C

29th Jul 2026525 AMAQI
29th Jul 2026506 AMAQI
29th Jul 2026467 AMAQI
29th Jul 2026528 AMAQI
29th Jul 2026429 AMAQI
29th Jul 20264210 AMAQI
29th Jul 20263411 AMAQI
29th Jul 20264012 PMAQI
29th Jul 2026491 PMAQI
29th Jul 2026592 PMAQI
29th Jul 2026573 PMAQI
29th Jul 2026674 PMAQI
29th Jul 2026725 PMAQI
29th Jul 2026726 PMAQI
29th Jul 2026687 PMAQI
29th Jul 2026768 PMAQI
29th Jul 2026839 PMAQI
29th Jul 20268010 PMAQI
29th Jul 20268511 PMAQI
30th Jul 20268212 AMAQI
30th Jul 2026751 AMAQI
30th Jul 2026622 AMAQI
30th Jul 2026623 AMAQI
30th Jul 2026564 AMAQI

24°C16/33°C

30th Jul 2026705 AMAQI
30th Jul 2026726 AMAQI
30th Jul 2026667 AMAQI
30th Jul 2026588 AMAQI
30th Jul 2026609 AMAQI
30th Jul 20266410 AMAQI
30th Jul 20266211 AMAQI
30th Jul 20266212 PMAQI
30th Jul 2026581 PMAQI
30th Jul 2026712 PMAQI
30th Jul 2026763 PMAQI
30th Jul 2026804 PMAQI
30th Jul 2026815 PMAQI
30th Jul 2026656 PMAQI
30th Jul 2026667 PMAQI
30th Jul 2026698 PMAQI
30th Jul 2026599 PMAQI
30th Jul 20268110 PMAQI
30th Jul 20266211 PMAQI
31st Jul 202610412 AMAQI
31st Jul 2026981 AMAQI
31st Jul 2026902 AMAQI
31st Jul 2026883 AMAQI
31st Jul 2026684 AMAQI

26°C16/35°C

31st Jul 2026625 AMAQI
31st Jul 2026546 AMAQI
31st Jul 2026547 AMAQI
31st Jul 2026648 AMAQI
31st Jul 2026809 AMAQI
31st Jul 20268510 AMAQI
31st Jul 20267711 AMAQI
31st Jul 20267012 PMAQI
31st Jul 2026681 PMAQI
31st Jul 2026642 PMAQI
31st Jul 2026613 PMAQI
31st Jul 2026704 PMAQI
31st Jul 2026625 PMAQI
31st Jul 2026546 PMAQI
31st Jul 2026837 PMAQI
31st Jul 2026658 PMAQI
31st Jul 2026649 PMAQI
31st Jul 20267810 PMAQI
31st Jul 20266611 PMAQI
1st Aug 20266612 AMAQI
1st Aug 2026661 AMAQI
1st Aug 2026582 AMAQI
1st Aug 2026463 AMAQI
1st Aug 2026574 AMAQI

27°C17/36°C

1st Aug 2026505 AMAQI
5 AM
1st Aug 2026626 AMAQI
1st Aug 2026607 AMAQI
1st Aug 2026578 AMAQI
1st Aug 2026569 AMAQI
1st Aug 20266610 AMAQI
1st Aug 20267811 AMAQI
1st Aug 202610312 PMAQI
12 PM
1st Aug 20261131 PMAQI
1st Aug 2026892 PMAQI
1st Aug 2026723 PMAQI
1st Aug 2026804 PMAQI
1st Aug 2026865 PMAQI
1st Aug 20261566 PMAQI
1st Aug 20261077 PMAQI
1st Aug 2026748 PMAQI
8 PM
1st Aug 2026749 PMAQI
12 AM
4 AM

25°C20/33°C

Day time
Avg. Highest Time
5 PM - 7 PM

51AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
7 AM - 8 AM

42AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 PM to 7 PM (Avg. 51), while the lowest AQI was between 7 AM to 8 AM (Avg. 42).
Night time
Avg. Highest Time
12 AM

59AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
4 AM

47AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 12 AM (Avg. 59), while the lowest AQI was between 4 AM to 4 AM (Avg. 47).

2026 Days Vs Air Quality

Hermiston, Oregon, United States

2026

89%

185

11%

24

Total number of days with different AQI categories in last 213 days in 2026 (152 days remaining)

Good
185 Days
Moderate
24 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 89%

Health Risk Level:

Low

In 2026, 89% of 213 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.

Annual Air Quality Insights

Hermiston, Oregon, United States

AQI levels in 2026

AQI (US)
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.

-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
56AQI (US)
2nd January 2026
56AQI (US)
3rd January 2026
53AQI (US)
4th January 2026
43AQI (US)
5th January 2026
23AQI (US)
6th January 2026
17AQI (US)
7th January 2026
11AQI (US)
8th January 2026
12AQI (US)
9th January 2026
13AQI (US)
10th January 2026
42AQI (US)
11th January 2026
48AQI (US)
12th January 2026
37AQI (US)
13th January 2026
26AQI (US)
14th January 2026
37AQI (US)
15th January 2026
58AQI (US)
16th January 2026
33AQI (US)
17th January 2026
30AQI (US)
18th January 2026
46AQI (US)
19th January 2026
31AQI (US)
20th January 2026
37AQI (US)
21st January 2026
32AQI (US)
22nd January 2026
36AQI (US)
23rd January 2026
38AQI (US)
24th January 2026
33AQI (US)
25th January 2026
38AQI (US)
26th January 2026
37AQI (US)
27th January 2026
26AQI (US)
28th January 2026
30AQI (US)
29th January 2026
38AQI (US)
30th January 2026
47AQI (US)
31st January 2026
28AQI (US)
1st February 2026
41AQI (US)
2nd February 2026
43AQI (US)
3rd February 2026
42AQI (US)
4th February 2026
37AQI (US)
5th February 2026
40AQI (US)
6th February 2026
29AQI (US)
7th February 2026
28AQI (US)
8th February 2026
40AQI (US)
9th February 2026
44AQI (US)
10th February 2026
37AQI (US)
11th February 2026
32AQI (US)
12th February 2026
22AQI (US)
13th February 2026
22AQI (US)
14th February 2026
30AQI (US)
15th February 2026
30AQI (US)
16th February 2026
44AQI (US)
17th February 2026
40AQI (US)
18th February 2026
34AQI (US)
19th February 2026
32AQI (US)
20th February 2026
29AQI (US)
21st February 2026
28AQI (US)
22nd February 2026
34AQI (US)
23rd February 2026
31AQI (US)
24th February 2026
45AQI (US)
25th February 2026
38AQI (US)
26th February 2026
30AQI (US)
27th February 2026
34AQI (US)
28th February 2026
29AQI (US)
1st March 2026
33AQI (US)
2nd March 2026
45AQI (US)
3rd March 2026
29AQI (US)
4th March 2026
41AQI (US)
5th March 2026
37AQI (US)
6th March 2026
29AQI (US)
7th March 2026
38AQI (US)
8th March 2026
55AQI (US)
9th March 2026
32AQI (US)
10th March 2026
32AQI (US)
11th March 2026
39AQI (US)
12th March 2026
52AQI (US)
13th March 2026
42AQI (US)
14th March 2026
34AQI (US)
15th March 2026
29AQI (US)
16th March 2026
22AQI (US)
17th March 2026
27AQI (US)
18th March 2026
33AQI (US)
19th March 2026
27AQI (US)
20th March 2026
41AQI (US)
21st March 2026
36AQI (US)
22nd March 2026
32AQI (US)
23rd March 2026
30AQI (US)
24th March 2026
28AQI (US)
25th March 2026
32AQI (US)
26th March 2026
20AQI (US)
27th March 2026
16AQI (US)
28th March 2026
20AQI (US)
29th March 2026
12AQI (US)
30th March 2026
33AQI (US)
31st March 2026
20AQI (US)
1st April 2026
24AQI (US)
2nd April 2026
25AQI (US)
3rd April 2026
24AQI (US)
4th April 2026
29AQI (US)
5th April 2026
23AQI (US)
6th April 2026
24AQI (US)
7th April 2026
26AQI (US)
8th April 2026
26AQI (US)
9th April 2026
28AQI (US)
10th April 2026
31AQI (US)
11th April 2026
30AQI (US)
12th April 2026
25AQI (US)
13th April 2026
45AQI (US)
14th April 2026
32AQI (US)
15th April 2026
33AQI (US)
16th April 2026
29AQI (US)
17th April 2026
18th April 2026
19AQI (US)
19th April 2026
19AQI (US)
20th April 2026
27AQI (US)
21st April 2026
42AQI (US)
22nd April 2026
23rd April 2026
21AQI (US)
24th April 2026
24AQI (US)
25th April 2026
22AQI (US)
26th April 2026
28AQI (US)
27th April 2026
18AQI (US)
28th April 2026
28AQI (US)
29th April 2026
20AQI (US)
30th April 2026
24AQI (US)
1st May 2026
24AQI (US)
2nd May 2026
23AQI (US)
3rd May 2026
24AQI (US)
4th May 2026
33AQI (US)
5th May 2026
33AQI (US)
6th May 2026
58AQI (US)
7th May 2026
21AQI (US)
8th May 2026
48AQI (US)
9th May 2026
10th May 2026
27AQI (US)
11th May 2026
25AQI (US)
12th May 2026
28AQI (US)
13th May 2026
64AQI (US)
14th May 2026
24AQI (US)
15th May 2026
42AQI (US)
16th May 2026
48AQI (US)
17th May 2026
55AQI (US)
18th May 2026
49AQI (US)
19th May 2026
46AQI (US)
20th May 2026
46AQI (US)
21st May 2026
37AQI (US)
22nd May 2026
40AQI (US)
23rd May 2026
48AQI (US)
24th May 2026
43AQI (US)
25th May 2026
45AQI (US)
26th May 2026
19AQI (US)
27th May 2026
16AQI (US)
28th May 2026
25AQI (US)
29th May 2026
41AQI (US)
30th May 2026
16AQI (US)
31st May 2026
20AQI (US)
1st June 2026
20AQI (US)
2nd June 2026
14AQI (US)
3rd June 2026
24AQI (US)
4th June 2026
19AQI (US)
5th June 2026
33AQI (US)
6th June 2026
18AQI (US)
7th June 2026
22AQI (US)
8th June 2026
22AQI (US)
9th June 2026
47AQI (US)
10th June 2026
28AQI (US)
11th June 2026
20AQI (US)
12th June 2026
21AQI (US)
13th June 2026
13AQI (US)
14th June 2026
18AQI (US)
15th June 2026
26AQI (US)
16th June 2026
54AQI (US)
17th June 2026
27AQI (US)
18th June 2026
20AQI (US)
19th June 2026
28AQI (US)
20th June 2026
38AQI (US)
21st June 2026
16AQI (US)
22nd June 2026
22AQI (US)
23rd June 2026
32AQI (US)
24th June 2026
25AQI (US)
25th June 2026
35AQI (US)
26th June 2026
41AQI (US)
27th June 2026
25AQI (US)
28th June 2026
30AQI (US)
29th June 2026
34AQI (US)
30th June 2026
17AQI (US)
1st July 2026
16AQI (US)
2nd July 2026
16AQI (US)
3rd July 2026
20AQI (US)
4th July 2026
21AQI (US)
5th July 2026
18AQI (US)
6th July 2026
25AQI (US)
7th July 2026
22AQI (US)
8th July 2026
20AQI (US)
9th July 2026
18AQI (US)
10th July 2026
24AQI (US)
11th July 2026
38AQI (US)
12th July 2026
24AQI (US)
13th July 2026
20AQI (US)
14th July 2026
31AQI (US)
15th July 2026
34AQI (US)
16th July 2026
42AQI (US)
17th July 2026
89AQI (US)
18th July 2026
54AQI (US)
19th July 2026
43AQI (US)
20th July 2026
66AQI (US)
21st July 2026
83AQI (US)
22nd July 2026
90AQI (US)
23rd July 2026
79AQI (US)
24th July 2026
56AQI (US)
25th July 2026
67AQI (US)
26th July 2026
59AQI (US)
27th July 2026
76AQI (US)
28th July 2026
70AQI (US)
29th July 2026
57AQI (US)
30th July 2026
68AQI (US)
31st July 2026
72AQI (US)
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

35AQI (US)

34AQI (US)

32AQI (US)

27AQI (US)

36AQI (US)

26AQI (US)

46AQI (US)

No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202634AQI (US)

27
4
28
29
2
28
27
3
29
1
17
14
185
24

Highest AQI (US) recorded in

July

46AQI (US)

Lowest AQI (US) recorded in

June

26AQI (US)

202530AQI (US)

25
6
25
3
31
30
31
30
31
23
8
16
14
26
5
20
10
27
4
315
50

Highest AQI (US) recorded in

September

50AQI (US)

Lowest AQI (US) recorded in

May

17AQI (US)

202424AQI (US)

20
4
28
1
31
30
31
29
27
4
24
7
26
4
31
26
4
29
2
332
26

Highest AQI (US) recorded in

August

37AQI (US)

Lowest AQI (US) recorded in

May

12AQI (US)

202326AQI (US)

31
25
3
31
27
29
2
30
31
22
6
1
2
30
28
3
19
10
27
4
330
28
1
2

Highest AQI (US) recorded in

August

54AQI (US)

Lowest AQI (US) recorded in

April

13AQI (US)

202228AQI (US)

22
7
22
31
25
31
30
21
2
21
4
4
14
17
18
12
28
3
265
43
4

Highest AQI (US) recorded in

September

48AQI (US)

Lowest AQI (US) recorded in

May

13AQI (US)

202126AQI (US)

24
5
24
4
31
30
31
29
1
27
4
20
5
5
1
25
5
31
27
3
31
330
27
5
1

Highest AQI (US) recorded in

August

57AQI (US)

Lowest AQI (US) recorded in

May

15AQI (US)

202030AQI (US)

18
30
31
30
1
26
2
1
1
27
3
27
3
26
5
215
14
1
1

Highest AQI (US) recorded in

September

42AQI (US)

Lowest AQI (US) recorded in

June

23AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2026(Avg.)
34AQI (US)
Least Polluted Year Recorded
2024(Avg.)
24AQI (US)

Hermiston's annual 2026 AQI (US) (34) shows an average percentage change of 25.2% (worsened AQI (US)) compared to previous years: 2020 (30), 2021 (26), 2022 (28), 2023 (26), 2024 (24), 2025 (30).