Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Ontario, 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

Ontario, Oregon, United States

2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Aug 2026
143AQI
Lowest AQI recorded on
17th Aug 2025
18AQI

Same Day Analysis (6th August):
On this day, AQI across the 2 years varied significantly: 2026 ranks 1st highest AQI at 103 of Poor air quality on the same day.

Day & Night AQI Trend: 6th Aug - 7th Aug 2026

Ontario, Oregon, United States

AQI
Day
Night
.

6 AM6th Aug 2026

9 PM

5 AM7th Aug 2026

Day time
Avg. Highest Time
6PM6th Aug

142AQI

Avg. Lowest Time
7AM6th Aug

90AQI

Night time
Avg. Highest Time
11PM6th Aug

118AQI

Avg. Lowest Time
2AM7th Aug

104AQI

In the last 24 hours,

Ontario's AQI reached its highest point of 142 at 6 PM during the Day, while the lowest point, 90, was recorded at 7 AM during the Day between 6th Aug and 7th Aug 2026.

Day & Night AQI Trend : Jul - Aug 2026

Ontario, Oregon, United States

JulAug
09th - 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 - 07th07th
Day
Night
9th Jul 2026226 AMAQI
9th Jul 2026207 AMAQI
9th Jul 2026208 AMAQI
9th Jul 2026339 AMAQI
9th Jul 20263210 AMAQI
9th Jul 20262711 AMAQI
9th Jul 20262612 PMAQI
9th Jul 2026261 PMAQI
9th Jul 2026202 PMAQI
9th Jul 2026163 PMAQI
9th Jul 2026154 PMAQI
9th Jul 2026165 PMAQI
9th Jul 2026206 PMAQI
9th Jul 2026157 PMAQI
9th Jul 2026108 PMAQI
9th Jul 202689 PMAQI
9th Jul 20261010 PMAQI
9th Jul 20261311 PMAQI
10th Jul 20262312 AMAQI
10th Jul 2026321 AMAQI
10th Jul 2026342 AMAQI
10th Jul 2026423 AMAQI
10th Jul 2026404 AMAQI
10th Jul 2026365 AMAQI

28°C18/36°C

10th Jul 2026386 AMAQI
10th Jul 2026447 AMAQI
10th Jul 2026488 AMAQI
10th Jul 2026509 AMAQI
10th Jul 20265010 AMAQI
10th Jul 20264911 AMAQI
10th Jul 20264412 PMAQI
10th Jul 2026411 PMAQI
10th Jul 2026402 PMAQI
10th Jul 2026383 PMAQI
10th Jul 2026314 PMAQI
10th Jul 2026315 PMAQI
10th Jul 2026346 PMAQI
10th Jul 2026327 PMAQI
10th Jul 2026308 PMAQI
10th Jul 2026209 PMAQI
10th Jul 20262010 PMAQI
10th Jul 20262611 PMAQI
11th Jul 20263212 AMAQI
11th Jul 2026401 AMAQI
11th Jul 2026372 AMAQI
11th Jul 2026423 AMAQI
11th Jul 2026384 AMAQI
11th Jul 2026365 AMAQI

29°C16/38°C

11th Jul 2026306 AMAQI
11th Jul 2026307 AMAQI
11th Jul 2026318 AMAQI
11th Jul 2026369 AMAQI
11th Jul 20264010 AMAQI
11th Jul 20264211 AMAQI
11th Jul 20263212 PMAQI
11th Jul 2026221 PMAQI
11th Jul 2026192 PMAQI
11th Jul 2026193 PMAQI
11th Jul 2026164 PMAQI
11th Jul 2026185 PMAQI
11th Jul 2026166 PMAQI
11th Jul 2026147 PMAQI
11th Jul 2026148 PMAQI
11th Jul 2026129 PMAQI
11th Jul 2026810 PMAQI
11th Jul 20262211 PMAQI
12th Jul 20262312 AMAQI
12th Jul 2026281 AMAQI
12th Jul 2026282 AMAQI
12th Jul 2026263 AMAQI
12th Jul 2026264 AMAQI
12th Jul 2026305 AMAQI

30°C20/40°C

12th Jul 2026336 AMAQI
12th Jul 2026347 AMAQI
12th Jul 2026338 AMAQI
12th Jul 2026329 AMAQI
12th Jul 20263210 AMAQI
12th Jul 20263111 AMAQI
12th Jul 20263012 PMAQI
12th Jul 2026321 PMAQI
12th Jul 2026302 PMAQI
12th Jul 2026303 PMAQI
12th Jul 2026254 PMAQI
12th Jul 2026225 PMAQI
12th Jul 2026186 PMAQI
12th Jul 2026177 PMAQI
12th Jul 2026168 PMAQI
12th Jul 2026169 PMAQI
12th Jul 20261610 PMAQI
12th Jul 20262711 PMAQI
13th Jul 20262412 AMAQI
13th Jul 2026311 AMAQI
13th Jul 2026342 AMAQI
13th Jul 2026323 AMAQI
13th Jul 2026284 AMAQI
13th Jul 2026285 AMAQI

30°C22/38°C

13th Jul 2026266 AMAQI
13th Jul 2026267 AMAQI
13th Jul 2026288 AMAQI
13th Jul 2026389 AMAQI
13th Jul 20264610 AMAQI
13th Jul 20265611 AMAQI
13th Jul 20265512 PMAQI
13th Jul 2026501 PMAQI
13th Jul 2026362 PMAQI
13th Jul 2026403 PMAQI
13th Jul 2026304 PMAQI
13th Jul 2026245 PMAQI
13th Jul 2026196 PMAQI
13th Jul 2026147 PMAQI
13th Jul 2026138 PMAQI
13th Jul 2026109 PMAQI
13th Jul 20261110 PMAQI
13th Jul 20261611 PMAQI
14th Jul 20261812 AMAQI
14th Jul 2026181 AMAQI
14th Jul 2026272 AMAQI
14th Jul 2026283 AMAQI
14th Jul 2026304 AMAQI
14th Jul 2026305 AMAQI

28°C21/35°C

14th Jul 2026296 AMAQI
14th Jul 2026227 AMAQI
14th Jul 2026358 AMAQI
14th Jul 2026549 AMAQI
14th Jul 20265410 AMAQI
14th Jul 20263711 AMAQI
14th Jul 20262412 PMAQI
14th Jul 2026181 PMAQI
14th Jul 2026122 PMAQI
14th Jul 202683 PMAQI
14th Jul 2026304 PMAQI
14th Jul 2026325 PMAQI
14th Jul 2026306 PMAQI
14th Jul 2026307 PMAQI
14th Jul 2026288 PMAQI
14th Jul 2026109 PMAQI
14th Jul 20261010 PMAQI
14th Jul 20261311 PMAQI
15th Jul 20261612 AMAQI
15th Jul 2026201 AMAQI
15th Jul 2026222 AMAQI
15th Jul 2026183 AMAQI
15th Jul 2026174 AMAQI
15th Jul 2026145 AMAQI

26°C21/32°C

15th Jul 2026156 AMAQI
15th Jul 2026147 AMAQI
15th Jul 2026148 AMAQI
15th Jul 2026189 AMAQI
15th Jul 20262010 AMAQI
15th Jul 20261811 AMAQI
15th Jul 20261712 PMAQI
15th Jul 2026181 PMAQI
15th Jul 2026182 PMAQI
15th Jul 2026183 PMAQI
15th Jul 2026154 PMAQI
15th Jul 2026145 PMAQI
15th Jul 2026106 PMAQI
15th Jul 2026107 PMAQI
15th Jul 2026148 PMAQI
15th Jul 2026149 PMAQI
15th Jul 20261510 PMAQI
15th Jul 20261811 PMAQI
16th Jul 20262112 AMAQI
16th Jul 2026261 AMAQI
16th Jul 2026272 AMAQI
16th Jul 2026283 AMAQI
16th Jul 2026264 AMAQI
16th Jul 2026245 AMAQI

28°C17/38°C

16th Jul 2026206 AMAQI
16th Jul 2026187 AMAQI
16th Jul 2026248 AMAQI
16th Jul 2026329 AMAQI
16th Jul 20263010 AMAQI
16th Jul 20264011 AMAQI
16th Jul 20263612 PMAQI
16th Jul 2026361 PMAQI
16th Jul 2026422 PMAQI
16th Jul 2026443 PMAQI
16th Jul 2026444 PMAQI
16th Jul 2026445 PMAQI
16th Jul 2026396 PMAQI
16th Jul 2026347 PMAQI
16th Jul 2026508 PMAQI
16th Jul 2026289 PMAQI
16th Jul 20262810 PMAQI
16th Jul 20262411 PMAQI
17th Jul 20262912 AMAQI
17th Jul 2026371 AMAQI
17th Jul 2026342 AMAQI
17th Jul 2026793 AMAQI
17th Jul 2026404 AMAQI
17th Jul 2026645 AMAQI

30°C17/39°C

17th Jul 2026866 AMAQI
17th Jul 2026967 AMAQI
17th Jul 2026868 AMAQI
17th Jul 2026819 AMAQI
17th Jul 20267410 AMAQI
17th Jul 20267011 AMAQI
17th Jul 20267612 PMAQI
17th Jul 2026731 PMAQI
17th Jul 2026722 PMAQI
17th Jul 2026703 PMAQI
17th Jul 2026584 PMAQI
17th Jul 2026545 PMAQI
17th Jul 2026446 PMAQI
17th Jul 2026517 PMAQI
17th Jul 2026568 PMAQI
17th Jul 2026529 PMAQI
17th Jul 20265410 PMAQI
17th Jul 20266011 PMAQI
18th Jul 20265312 AMAQI
18th Jul 2026571 AMAQI
18th Jul 2026562 AMAQI
18th Jul 2026663 AMAQI
18th Jul 2026624 AMAQI
18th Jul 2026705 AMAQI

30°C23/38°C

18th Jul 2026716 AMAQI
18th Jul 2026977 AMAQI
18th Jul 2026978 AMAQI
18th Jul 2026929 AMAQI
18th Jul 20269210 AMAQI
18th Jul 20268611 AMAQI
18th Jul 20269212 PMAQI
18th Jul 2026931 PMAQI
18th Jul 2026952 PMAQI
18th Jul 2026953 PMAQI
18th Jul 2026944 PMAQI
18th Jul 20261005 PMAQI
18th Jul 2026946 PMAQI
18th Jul 20261007 PMAQI
18th Jul 2026948 PMAQI
18th Jul 2026969 PMAQI
18th Jul 20269410 PMAQI
18th Jul 20269011 PMAQI
19th Jul 20269412 AMAQI
19th Jul 2026941 AMAQI
19th Jul 2026982 AMAQI
19th Jul 2026973 AMAQI
19th Jul 2026984 AMAQI
19th Jul 2026925 AMAQI

30°C20/39°C

19th Jul 2026926 AMAQI
19th Jul 2026887 AMAQI
19th Jul 2026868 AMAQI
19th Jul 2026879 AMAQI
19th Jul 20268410 AMAQI
19th Jul 20269211 AMAQI
19th Jul 20269012 PMAQI
19th Jul 20261081 PMAQI
19th Jul 20261282 PMAQI
19th Jul 20261213 PMAQI
19th Jul 20261204 PMAQI
19th Jul 20261245 PMAQI
19th Jul 20261016 PMAQI
19th Jul 20261007 PMAQI
19th Jul 2026888 PMAQI
19th Jul 20261009 PMAQI
19th Jul 202613410 PMAQI
19th Jul 202615111 PMAQI
20th Jul 202615212 AMAQI
20th Jul 20261521 AMAQI
20th Jul 20261502 AMAQI
20th Jul 20261543 AMAQI
20th Jul 20261524 AMAQI
20th Jul 20261565 AMAQI

29°C19/38°C

20th Jul 20261626 AMAQI
20th Jul 20261617 AMAQI
20th Jul 20261648 AMAQI
20th Jul 20261609 AMAQI
20th Jul 202615810 AMAQI
20th Jul 202616211 AMAQI
20th Jul 202616012 PMAQI
20th Jul 20261581 PMAQI
20th Jul 20261472 PMAQI
20th Jul 20261103 PMAQI
20th Jul 2026944 PMAQI
20th Jul 2026875 PMAQI
20th Jul 2026816 PMAQI
20th Jul 2026737 PMAQI
20th Jul 2026748 PMAQI
20th Jul 20267810 PMAQI
20th Jul 202613611 PMAQI
21st Jul 202614112 AMAQI
21st Jul 20261531 AMAQI
21st Jul 20261542 AMAQI
21st Jul 20261413 AMAQI
21st Jul 20261464 AMAQI
21st Jul 20261535 AMAQI

31°C22/40°C

21st Jul 20261546 AMAQI
21st Jul 20261567 AMAQI
21st Jul 20261578 AMAQI
21st Jul 20261569 AMAQI
21st Jul 202615110 AMAQI
21st Jul 202614811 AMAQI
21st Jul 202615012 PMAQI
21st Jul 20261531 PMAQI
21st Jul 20261532 PMAQI
21st Jul 20261533 PMAQI
21st Jul 20261484 PMAQI
21st Jul 20261505 PMAQI
21st Jul 20261406 PMAQI
21st Jul 20261227 PMAQI
21st Jul 20261168 PMAQI
21st Jul 20261229 PMAQI
21st Jul 202611810 PMAQI
21st Jul 202610911 PMAQI
22nd Jul 20269812 AMAQI
22nd Jul 2026901 AMAQI
22nd Jul 2026762 AMAQI
22nd Jul 2026963 AMAQI
22nd Jul 20261214 AMAQI
22nd Jul 20261325 AMAQI

30°C23/38°C

22nd Jul 20261456 AMAQI
22nd Jul 20261507 AMAQI
22nd Jul 20261518 AMAQI
22nd Jul 20261489 AMAQI
22nd Jul 202614410 AMAQI
22nd Jul 202613211 AMAQI
22nd Jul 202614212 PMAQI
22nd Jul 20261321 PMAQI
22nd Jul 20261342 PMAQI
22nd Jul 20261473 PMAQI
22nd Jul 20261484 PMAQI
22nd Jul 20261425 PMAQI
22nd Jul 20261046 PMAQI
22nd Jul 2026837 PMAQI
22nd Jul 2026818 PMAQI
22nd Jul 2026819 PMAQI
22nd Jul 20268110 PMAQI
22nd Jul 20268211 PMAQI
23rd Jul 20268712 AMAQI
23rd Jul 2026861 AMAQI
23rd Jul 2026852 AMAQI
23rd Jul 2026873 AMAQI
23rd Jul 2026924 AMAQI
23rd Jul 2026875 AMAQI

29°C22/38°C

23rd Jul 2026896 AMAQI
23rd Jul 2026937 AMAQI
23rd Jul 2026928 AMAQI
23rd Jul 2026869 AMAQI
23rd Jul 20269210 AMAQI
23rd Jul 20268711 AMAQI
23rd Jul 20269012 PMAQI
23rd Jul 2026941 PMAQI
23rd Jul 2026902 PMAQI
23rd Jul 2026993 PMAQI
23rd Jul 2026964 PMAQI
23rd Jul 2026935 PMAQI
23rd Jul 2026876 PMAQI
23rd Jul 2026847 PMAQI
23rd Jul 20261058 PMAQI
23rd Jul 2026789 PMAQI
23rd Jul 20267210 PMAQI
23rd Jul 20266611 PMAQI
24th Jul 20266812 AMAQI
24th Jul 2026711 AMAQI
24th Jul 2026662 AMAQI
24th Jul 2026683 AMAQI
24th Jul 2026674 AMAQI
24th Jul 2026715 AMAQI

28°C18/39°C

24th Jul 2026866 AMAQI
24th Jul 20261147 AMAQI
24th Jul 20261128 AMAQI
24th Jul 20261129 AMAQI
24th Jul 202613410 AMAQI
24th Jul 202614211 AMAQI
24th Jul 202615212 PMAQI
24th Jul 20261581 PMAQI
24th Jul 20261592 PMAQI
24th Jul 20261603 PMAQI
24th Jul 20261564 PMAQI
24th Jul 20261325 PMAQI
24th Jul 2026956 PMAQI
24th Jul 2026767 PMAQI
24th Jul 2026658 PMAQI
24th Jul 2026559 PMAQI
24th Jul 20265210 PMAQI
24th Jul 20265411 PMAQI
25th Jul 20265312 AMAQI
25th Jul 2026551 AMAQI
25th Jul 2026562 AMAQI
25th Jul 2026623 AMAQI
25th Jul 2026684 AMAQI
25th Jul 2026725 AMAQI

29°C18/40°C

25th Jul 2026726 AMAQI
25th Jul 2026717 AMAQI
25th Jul 2026718 AMAQI
25th Jul 2026729 AMAQI
25th Jul 20266810 AMAQI
25th Jul 20267111 AMAQI
25th Jul 20266812 PMAQI
25th Jul 2026601 PMAQI
25th Jul 2026532 PMAQI
25th Jul 2026583 PMAQI
25th Jul 2026624 PMAQI
25th Jul 2026645 PMAQI
25th Jul 2026566 PMAQI
25th Jul 2026527 PMAQI
25th Jul 2026488 PMAQI
25th Jul 2026529 PMAQI
25th Jul 20265510 PMAQI
25th Jul 20265611 PMAQI
26th Jul 20267112 AMAQI
26th Jul 2026891 AMAQI
26th Jul 2026972 AMAQI
26th Jul 20261583 AMAQI
26th Jul 20261584 AMAQI
26th Jul 20261765 AMAQI

29°C16/40°C

26th Jul 20261806 AMAQI
26th Jul 20261877 AMAQI
26th Jul 20261948 AMAQI
26th Jul 20262029 AMAQI
26th Jul 202620810 AMAQI
26th Jul 202620011 AMAQI
26th Jul 202620212 PMAQI
26th Jul 20262101 PMAQI
26th Jul 20262002 PMAQI
26th Jul 20262033 PMAQI
26th Jul 20262104 PMAQI
26th Jul 20262025 PMAQI
26th Jul 20261826 PMAQI
26th Jul 20261717 PMAQI
26th Jul 20261668 PMAQI
26th Jul 20261619 PMAQI
26th Jul 202616210 PMAQI
26th Jul 202616011 PMAQI
27th Jul 202616012 AMAQI
27th Jul 20261661 AMAQI
27th Jul 20261742 AMAQI
27th Jul 20261963 AMAQI
27th Jul 20262174 AMAQI
27th Jul 20262285 AMAQI

28°C19/36°C

27th Jul 20262346 AMAQI
27th Jul 20262527 AMAQI
27th Jul 20262618 AMAQI
27th Jul 20262529 AMAQI
27th Jul 202624310 AMAQI
27th Jul 202623711 AMAQI
27th Jul 202623212 PMAQI
27th Jul 20262271 PMAQI
27th Jul 20262102 PMAQI
27th Jul 20262003 PMAQI
27th Jul 20261924 PMAQI
27th Jul 20261865 PMAQI
27th Jul 20261746 PMAQI
27th Jul 20261587 PMAQI
27th Jul 20261508 PMAQI
27th Jul 20261289 PMAQI
27th Jul 202612210 PMAQI
27th Jul 202610611 PMAQI
28th Jul 202610812 AMAQI
28th Jul 20261221 AMAQI
28th Jul 20261622 AMAQI
28th Jul 20261643 AMAQI
28th Jul 20261664 AMAQI
28th Jul 20261715 AMAQI

28°C19/36°C

28th Jul 20261746 AMAQI
28th Jul 20261887 AMAQI
28th Jul 20261888 AMAQI
28th Jul 20261889 AMAQI
28th Jul 202618110 AMAQI
28th Jul 202617011 AMAQI
28th Jul 202616712 PMAQI
28th Jul 20261711 PMAQI
28th Jul 20261742 PMAQI
28th Jul 20261803 PMAQI
28th Jul 20261784 PMAQI
28th Jul 20261725 PMAQI
28th Jul 20261686 PMAQI
28th Jul 20261707 PMAQI
28th Jul 20261688 PMAQI
28th Jul 20261689 PMAQI
28th Jul 202616810 PMAQI
28th Jul 202616611 PMAQI
29th Jul 202616812 AMAQI
29th Jul 20261621 AMAQI
29th Jul 20261682 AMAQI
29th Jul 20261703 AMAQI
29th Jul 20261664 AMAQI
29th Jul 20261655 AMAQI

28°C17/36°C

29th Jul 20261686 AMAQI
29th Jul 20261677 AMAQI
29th Jul 20261608 AMAQI
29th Jul 20261589 AMAQI
29th Jul 202615010 AMAQI
29th Jul 202614511 AMAQI
29th Jul 202615212 PMAQI
29th Jul 20261601 PMAQI
29th Jul 20261622 PMAQI
29th Jul 20261663 PMAQI
29th Jul 20261624 PMAQI
29th Jul 20261635 PMAQI
29th Jul 20261606 PMAQI
29th Jul 20261627 PMAQI
29th Jul 20261538 PMAQI
29th Jul 20261529 PMAQI
29th Jul 202615410 PMAQI
29th Jul 202615311 PMAQI
30th Jul 202615612 AMAQI
30th Jul 20261601 AMAQI
30th Jul 20261622 AMAQI
30th Jul 20261663 AMAQI
30th Jul 20261594 AMAQI
30th Jul 20261565 AMAQI

29°C20/37°C

30th Jul 20261546 AMAQI
30th Jul 20261527 AMAQI
30th Jul 20261528 AMAQI
30th Jul 20261549 AMAQI
30th Jul 202616110 AMAQI
30th Jul 202615811 AMAQI
30th Jul 202615512 PMAQI
30th Jul 20261521 PMAQI
30th Jul 20261322 PMAQI
30th Jul 20261143 PMAQI
30th Jul 2026984 PMAQI
30th Jul 2026845 PMAQI
30th Jul 2026856 PMAQI
30th Jul 2026807 PMAQI
30th Jul 2026908 PMAQI
30th Jul 2026949 PMAQI
30th Jul 20269710 PMAQI
30th Jul 202610011 PMAQI
31st Jul 202610512 AMAQI
31st Jul 20261441 AMAQI
31st Jul 20261622 AMAQI
31st Jul 20261653 AMAQI
31st Jul 20261724 AMAQI
31st Jul 20261725 AMAQI

28°C19/37°C

31st Jul 20261666 AMAQI
31st Jul 20261667 AMAQI
31st Jul 20261668 AMAQI
31st Jul 20261629 AMAQI
31st Jul 202616610 AMAQI
31st Jul 202615911 AMAQI
31st Jul 202616012 PMAQI
31st Jul 20261541 PMAQI
31st Jul 20261352 PMAQI
31st Jul 20261063 PMAQI
31st Jul 20261004 PMAQI
31st Jul 2026865 PMAQI
31st Jul 2026746 PMAQI
31st Jul 2026687 PMAQI
31st Jul 2026648 PMAQI
31st Jul 2026639 PMAQI
31st Jul 20266210 PMAQI
31st Jul 20266711 PMAQI
1st Aug 20266412 AMAQI
1st Aug 2026641 AMAQI
1st Aug 2026672 AMAQI
1st Aug 2026653 AMAQI
1st Aug 2026644 AMAQI
1st Aug 2026685 AMAQI

31°C20/40°C

1st Aug 2026666 AMAQI
1st Aug 2026697 AMAQI
1st Aug 2026748 AMAQI
1st Aug 2026849 AMAQI
1st Aug 20267610 AMAQI
1st Aug 20268511 AMAQI
1st Aug 20269612 PMAQI
1st Aug 20261061 PMAQI
1st Aug 20261102 PMAQI
1st Aug 20261203 PMAQI
1st Aug 20261244 PMAQI
1st Aug 20261125 PMAQI
1st Aug 20261006 PMAQI
1st Aug 2026987 PMAQI
1st Aug 2026988 PMAQI
1st Aug 2026839 PMAQI
1st Aug 20267410 PMAQI
1st Aug 20266611 PMAQI
2nd Aug 202610012 AMAQI
2nd Aug 20261281 AMAQI
2nd Aug 20261472 AMAQI
2nd Aug 20261823 AMAQI
2nd Aug 20261614 AMAQI
2nd Aug 20261325 AMAQI

29°C19/39°C

2nd Aug 20261066 AMAQI
2nd Aug 2026847 AMAQI
2nd Aug 2026718 AMAQI
2nd Aug 2026999 AMAQI
2nd Aug 20268610 AMAQI
2nd Aug 20268111 AMAQI
2nd Aug 20268312 PMAQI
2nd Aug 2026581 PMAQI
2nd Aug 2026642 PMAQI
2nd Aug 2026693 PMAQI
2nd Aug 2026744 PMAQI
2nd Aug 2026745 PMAQI
2nd Aug 2026696 PMAQI
2nd Aug 2026657 PMAQI
2nd Aug 2026638 PMAQI
2nd Aug 2026699 PMAQI
2nd Aug 20267610 PMAQI
2nd Aug 20266011 PMAQI
3rd Aug 20265412 AMAQI
3rd Aug 2026671 AMAQI
3rd Aug 2026792 AMAQI
3rd Aug 2026833 AMAQI
3rd Aug 2026814 AMAQI
3rd Aug 2026765 AMAQI

24°C16/32°C

3rd Aug 2026686 AMAQI
3rd Aug 2026767 AMAQI
3rd Aug 2026768 AMAQI
3rd Aug 2026769 AMAQI
3rd Aug 20268410 AMAQI
3rd Aug 202611411 AMAQI
3rd Aug 202613512 PMAQI
3rd Aug 20261221 PMAQI
3rd Aug 20261082 PMAQI
3rd Aug 20261153 PMAQI
3rd Aug 20261284 PMAQI
3rd Aug 20261425 PMAQI
3rd Aug 20261536 PMAQI
3rd Aug 20261607 PMAQI
3rd Aug 20261648 PMAQI
3rd Aug 20261609 PMAQI
3rd Aug 202615610 PMAQI
3rd Aug 202614611 PMAQI
4th Aug 202613612 AMAQI
4th Aug 20261581 AMAQI
4th Aug 20261642 AMAQI
4th Aug 20261683 AMAQI
4th Aug 20261664 AMAQI
4th Aug 20261625 AMAQI

22°C15/30°C

4th Aug 20261586 AMAQI
4th Aug 20261567 AMAQI
4th Aug 20261578 AMAQI
4th Aug 20261549 AMAQI
4th Aug 202615110 AMAQI
4th Aug 202614811 AMAQI
4th Aug 202614212 PMAQI
4th Aug 20261481 PMAQI
4th Aug 20261522 PMAQI
4th Aug 20261523 PMAQI
4th Aug 20261544 PMAQI
4th Aug 20261515 PMAQI
4th Aug 20261126 PMAQI
4th Aug 20261047 PMAQI
4th Aug 20261128 PMAQI
4th Aug 20261059 PMAQI
4th Aug 202610510 PMAQI
4th Aug 202611211 PMAQI
5th Aug 202611212 AMAQI
5th Aug 20261201 AMAQI
5th Aug 20261182 AMAQI
5th Aug 20261203 AMAQI
5th Aug 20261204 AMAQI
5th Aug 2026895 AMAQI

24°C13/33°C

5th Aug 2026766 AMAQI
5th Aug 2026717 AMAQI
5th Aug 2026858 AMAQI
5th Aug 2026939 AMAQI
5th Aug 20269710 AMAQI
5th Aug 20268511 AMAQI
5th Aug 20267212 PMAQI
5th Aug 2026691 PMAQI
5th Aug 2026702 PMAQI
5th Aug 2026783 PMAQI
5th Aug 2026804 PMAQI
5th Aug 2026765 PMAQI
5th Aug 2026866 PMAQI
5th Aug 2026787 PMAQI
5th Aug 2026718 PMAQI
5th Aug 2026759 PMAQI
5th Aug 20266610 PMAQI
5th Aug 20266611 PMAQI
6th Aug 20266612 AMAQI
6th Aug 2026641 AMAQI
6th Aug 2026762 AMAQI
6th Aug 2026763 AMAQI
6th Aug 2026874 AMAQI
6th Aug 2026925 AMAQI

25°C12/36°C

6th Aug 2026926 AMAQI
6th Aug 2026907 AMAQI
6th Aug 2026938 AMAQI
6th Aug 2026979 AMAQI
6th Aug 20269210 AMAQI
6th Aug 20269211 AMAQI
6th Aug 202610512 PMAQI
6th Aug 20261101 PMAQI
6th Aug 20261082 PMAQI
6th Aug 20261143 PMAQI
6th Aug 20261284 PMAQI
6th Aug 20261315 PMAQI
6th Aug 20261426 PMAQI
6th Aug 20261407 PMAQI
6th Aug 20261308 PMAQI
6th Aug 20261229 PMAQI
6th Aug 202611610 PMAQI
6th Aug 202611811 PMAQI
7th Aug 202611412 AMAQI
7th Aug 20261121 AMAQI
7th Aug 20261042 AMAQI
7th Aug 20261153 AMAQI
7th Aug 20261144 AMAQI
7th Aug 20261125 AMAQI

27°C15/38°C

7th Aug 20261126 AMAQI
6 AM
7th Aug 20261257 AMAQI
7th Aug 20261288 AMAQI
7th Aug 20261289 AMAQI
7th Aug 202614810 AMAQI
7th Aug 202614611 AMAQI
7th Aug 202615412 PMAQI
7th Aug 20261601 PMAQI
1 PM
7th Aug 20261652 PMAQI
7th Aug 20261653 PMAQI
7th Aug 20261644 PMAQI
7th Aug 20261665 PMAQI
7th Aug 20261696 PMAQI
7th Aug 20261687 PMAQI
7th Aug 20261648 PMAQI
7th Aug 20261649 PMAQI
9 PM
7th Aug 202616410 PMAQI
1 AM
5 AM

28°C17/39°C

Day time
Avg. Highest Time
7 AM - 4 PM

103AQI

10 hours / Day
300 hours / Month
Avg. Lowest Time
9 PM

79AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 7 AM to 4 PM (Avg. 103), while the lowest AQI was between 9 PM to 9 PM (Avg. 79).
Night time
Avg. Highest Time
3 AM - 5 AM

97AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM

79AQI

1 hours / Day
30 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 3 AM to 5 AM (Avg. 97), while the lowest AQI was between 12 AM to 12 AM (Avg. 79).

2026 Days Vs Air Quality

Ontario, Oregon, United States

2026

89%

192

4%

9

5%

10

2%

4

Total number of days with different AQI categories in last 219 days in 2026 (146 days remaining)

Good
192 Days
Moderate
9 Days
Poor
10 Days
Unhealthy
4 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 89%

Health Risk Level:

Low

In 2026, 89% of 219 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

Ontario, 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
53AQI (US)
2nd January 2026
43AQI (US)
3rd January 2026
24AQI (US)
4th January 2026
20AQI (US)
5th January 2026
20AQI (US)
6th January 2026
28AQI (US)
7th January 2026
22AQI (US)
8th January 2026
30AQI (US)
9th January 2026
53AQI (US)
10th January 2026
35AQI (US)
11th January 2026
36AQI (US)
12th January 2026
38AQI (US)
13th January 2026
41AQI (US)
14th January 2026
39AQI (US)
15th January 2026
38AQI (US)
16th January 2026
35AQI (US)
17th January 2026
29AQI (US)
18th January 2026
30AQI (US)
19th January 2026
26AQI (US)
20th January 2026
21AQI (US)
21st January 2026
27AQI (US)
22nd January 2026
35AQI (US)
23rd January 2026
44AQI (US)
24th January 2026
39AQI (US)
25th January 2026
28AQI (US)
26th January 2026
30AQI (US)
27th January 2026
37AQI (US)
28th January 2026
32AQI (US)
29th January 2026
41AQI (US)
30th January 2026
49AQI (US)
31st January 2026
39AQI (US)
1st February 2026
34AQI (US)
2nd February 2026
37AQI (US)
3rd February 2026
40AQI (US)
4th February 2026
35AQI (US)
5th February 2026
40AQI (US)
6th February 2026
44AQI (US)
7th February 2026
42AQI (US)
8th February 2026
44AQI (US)
9th February 2026
41AQI (US)
10th February 2026
32AQI (US)
11th February 2026
28AQI (US)
12th February 2026
33AQI (US)
13th February 2026
27AQI (US)
14th February 2026
41AQI (US)
15th February 2026
25AQI (US)
16th February 2026
35AQI (US)
17th February 2026
34AQI (US)
18th February 2026
37AQI (US)
19th February 2026
26AQI (US)
20th February 2026
31AQI (US)
21st February 2026
27AQI (US)
22nd February 2026
34AQI (US)
23rd February 2026
32AQI (US)
24th February 2026
29AQI (US)
25th February 2026
36AQI (US)
26th February 2026
28AQI (US)
27th February 2026
27AQI (US)
28th February 2026
26AQI (US)
1st March 2026
38AQI (US)
2nd March 2026
49AQI (US)
3rd March 2026
25AQI (US)
4th March 2026
37AQI (US)
5th March 2026
42AQI (US)
6th March 2026
34AQI (US)
7th March 2026
33AQI (US)
8th March 2026
34AQI (US)
9th March 2026
26AQI (US)
10th March 2026
26AQI (US)
11th March 2026
30AQI (US)
12th March 2026
29AQI (US)
13th March 2026
38AQI (US)
14th March 2026
43AQI (US)
15th March 2026
36AQI (US)
16th March 2026
29AQI (US)
17th March 2026
39AQI (US)
18th March 2026
35AQI (US)
19th March 2026
28AQI (US)
20th March 2026
29AQI (US)
21st March 2026
29AQI (US)
22nd March 2026
30AQI (US)
23rd March 2026
30AQI (US)
24th March 2026
40AQI (US)
25th March 2026
30AQI (US)
26th March 2026
24AQI (US)
27th March 2026
21AQI (US)
28th March 2026
28AQI (US)
29th March 2026
24AQI (US)
30th March 2026
26AQI (US)
31st March 2026
21AQI (US)
1st April 2026
30AQI (US)
2nd April 2026
34AQI (US)
3rd April 2026
28AQI (US)
4th April 2026
23AQI (US)
5th April 2026
26AQI (US)
6th April 2026
26AQI (US)
7th April 2026
24AQI (US)
8th April 2026
24AQI (US)
9th April 2026
28AQI (US)
10th April 2026
29AQI (US)
11th April 2026
30AQI (US)
12th April 2026
29AQI (US)
13th April 2026
33AQI (US)
14th April 2026
29AQI (US)
15th April 2026
29AQI (US)
16th April 2026
32AQI (US)
17th April 2026
18th April 2026
29AQI (US)
19th April 2026
24AQI (US)
20th April 2026
21AQI (US)
21st April 2026
44AQI (US)
22nd April 2026
23rd April 2026
27AQI (US)
24th April 2026
28AQI (US)
25th April 2026
28AQI (US)
26th April 2026
29AQI (US)
27th April 2026
21AQI (US)
28th April 2026
17AQI (US)
29th April 2026
22AQI (US)
30th April 2026
23AQI (US)
1st May 2026
24AQI (US)
2nd May 2026
26AQI (US)
3rd May 2026
22AQI (US)
4th May 2026
27AQI (US)
5th May 2026
28AQI (US)
6th May 2026
27AQI (US)
7th May 2026
26AQI (US)
8th May 2026
27AQI (US)
9th May 2026
10th May 2026
26AQI (US)
11th May 2026
37AQI (US)
12th May 2026
35AQI (US)
13th May 2026
44AQI (US)
14th May 2026
16AQI (US)
15th May 2026
25AQI (US)
16th May 2026
38AQI (US)
17th May 2026
44AQI (US)
18th May 2026
32AQI (US)
19th May 2026
27AQI (US)
20th May 2026
28AQI (US)
21st May 2026
22AQI (US)
22nd May 2026
24AQI (US)
23rd May 2026
28AQI (US)
24th May 2026
32AQI (US)
25th May 2026
33AQI (US)
26th May 2026
45AQI (US)
27th May 2026
22AQI (US)
28th May 2026
30AQI (US)
29th May 2026
20AQI (US)
30th May 2026
16AQI (US)
31st May 2026
13AQI (US)
1st June 2026
19AQI (US)
2nd June 2026
26AQI (US)
3rd June 2026
35AQI (US)
4th June 2026
27AQI (US)
5th June 2026
26AQI (US)
6th June 2026
22AQI (US)
7th June 2026
23AQI (US)
8th June 2026
30AQI (US)
9th June 2026
17AQI (US)
10th June 2026
16AQI (US)
11th June 2026
17AQI (US)
12th June 2026
22AQI (US)
13th June 2026
18AQI (US)
14th June 2026
16AQI (US)
15th June 2026
24AQI (US)
16th June 2026
34AQI (US)
17th June 2026
32AQI (US)
18th June 2026
23AQI (US)
19th June 2026
34AQI (US)
20th June 2026
25AQI (US)
21st June 2026
16AQI (US)
22nd June 2026
21AQI (US)
23rd June 2026
31AQI (US)
24th June 2026
32AQI (US)
25th June 2026
26AQI (US)
26th June 2026
21AQI (US)
27th June 2026
21AQI (US)
28th June 2026
21AQI (US)
29th June 2026
20AQI (US)
30th June 2026
16AQI (US)
1st July 2026
21AQI (US)
2nd July 2026
18AQI (US)
3rd July 2026
17AQI (US)
4th July 2026
18AQI (US)
5th July 2026
34AQI (US)
6th July 2026
32AQI (US)
7th July 2026
32AQI (US)
8th July 2026
36AQI (US)
9th July 2026
22AQI (US)
10th July 2026
36AQI (US)
11th July 2026
27AQI (US)
12th July 2026
26AQI (US)
13th July 2026
30AQI (US)
14th July 2026
26AQI (US)
15th July 2026
16AQI (US)
16th July 2026
32AQI (US)
17th July 2026
62AQI (US)
18th July 2026
85AQI (US)
19th July 2026
103AQI (US)
20th July 2026
134AQI (US)
21st July 2026
144AQI (US)
22nd July 2026
118AQI (US)
23rd July 2026
88AQI (US)
24th July 2026
101AQI (US)
25th July 2026
61AQI (US)
26th July 2026
173AQI (US)
27th July 2026
196AQI (US)
28th July 2026
168AQI (US)
29th July 2026
160AQI (US)
30th July 2026
132AQI (US)
31st July 2026
127AQI (US)
1st August 2026
85AQI (US)
2nd August 2026
92AQI (US)
3rd August 2026
109AQI (US)
4th August 2026
143AQI (US)
5th August 2026
86AQI (US)
6th August 2026
103AQI (US)
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

34AQI (US)

34AQI (US)

32AQI (US)

27AQI (US)

28AQI (US)

24AQI (US)

73AQI (US)

103AQI (US)

No. of days

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

202638AQI (US)

29
2
28
31
28
30
30
16
4
7
4
3
3
192
9
10
4

Highest AQI (US) recorded in

August

103AQI (US)

Lowest AQI (US) recorded in

June

24AQI (US)

202534AQI (US)

6
30
31
30
31
23
8
21
9
31
29
1
21
10
253
28

Highest AQI (US) recorded in

September

45AQI (US)

Lowest AQI (US) recorded in

May

24AQI (US)

Most & Least Polluted Years Over the Last 2 Years

Most Polluted Year Recorded
2026(Avg.)
38AQI (US)
Least Polluted Year Recorded
2025(Avg.)
34AQI (US)

Ontario's annual 2026 AQI (US) (38) shows an average percentage change of 11.7% (worsened AQI (US)) compared to previous years: 2025 (34).