Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Sarnia, Ontario, Canada 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+

July Air Quality Analysis

Sarnia, Ontario, Canada

2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
31st Jul 2025
106AQI
Lowest AQI recorded on
22nd Jul 2025
24AQI

Same Day Analysis (30th July):
On this day, AQI across the 2 years varied significantly: 2026 ranks 2nd highest AQI at 37 of Good air quality, showing improvement over 2025 on the same day.

Day & Night AQI Trend: 29th Jul - 30th Jul 2026

Sarnia, Ontario, Canada

AQI
Day
Night
.

6 AM29th Jul 2026

9 PM

5 AM30th Jul 2026

Day time
Avg. Highest Time
7PM29th Jul

50AQI

Avg. Lowest Time
8AM29th Jul

22AQI

Night time
Avg. Highest Time
1AM30th Jul

56AQI

Avg. Lowest Time
10PM29th Jul

22AQI

In the last 24 hours,

Sarnia's AQI reached its highest point of 56 at 1 AM during the Night, while the lowest point, 22, was recorded at 10 PM during the Night between 29th Jul and 30th Jul 2026.

Day & Night AQI Trend : Jul 2026

Sarnia, Ontario, Canada

Jul
01st - 02nd02nd - 03rd03rd - 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
Day
Night
1st Jul 2026276 AMAQI
1st Jul 2026287 AMAQI
1st Jul 2026678 AMAQI
1st Jul 2026689 AMAQI
1st Jul 20267010 AMAQI
1st Jul 20267411 AMAQI
1st Jul 20267212 PMAQI
1st Jul 2026761 PMAQI
1st Jul 2026722 PMAQI
1st Jul 2026743 PMAQI
1st Jul 2026694 PMAQI
1st Jul 2026685 PMAQI
1st Jul 2026506 PMAQI
1st Jul 2026267 PMAQI
1st Jul 2026258 PMAQI
1st Jul 2026289 PMAQI
1st Jul 20262210 PMAQI
1st Jul 20262511 PMAQI
2nd Jul 20263312 AMAQI
2nd Jul 2026421 AMAQI
2nd Jul 2026462 AMAQI
2nd Jul 2026503 AMAQI
2nd Jul 2026534 AMAQI
2nd Jul 2026565 AMAQI

26°C24/31°C

2nd Jul 2026586 AMAQI
2nd Jul 2026587 AMAQI
2nd Jul 2026578 AMAQI
2nd Jul 2026519 AMAQI
2nd Jul 20264910 AMAQI
2nd Jul 20264611 AMAQI
2nd Jul 20264912 PMAQI
2nd Jul 2026521 PMAQI
2nd Jul 2026502 PMAQI
2nd Jul 2026503 PMAQI
2nd Jul 2026494 PMAQI
2nd Jul 2026475 PMAQI
2nd Jul 2026346 PMAQI
2nd Jul 2026317 PMAQI
2nd Jul 2026298 PMAQI
2nd Jul 2026299 PMAQI
2nd Jul 20263110 PMAQI
2nd Jul 20263811 PMAQI
3rd Jul 20264612 AMAQI
3rd Jul 2026531 AMAQI
3rd Jul 2026442 AMAQI
3rd Jul 2026333 AMAQI
3rd Jul 2026404 AMAQI
3rd Jul 2026405 AMAQI

26°C23/32°C

3rd Jul 2026446 AMAQI
3rd Jul 2026407 AMAQI
3rd Jul 2026388 AMAQI
3rd Jul 2026339 AMAQI
3rd Jul 20263110 AMAQI
3rd Jul 20263211 AMAQI
3rd Jul 20262812 PMAQI
3rd Jul 2026321 PMAQI
3rd Jul 2026302 PMAQI
3rd Jul 2026283 PMAQI
3rd Jul 2026284 PMAQI
3rd Jul 2026295 PMAQI
3rd Jul 2026296 PMAQI
3rd Jul 2026267 PMAQI
3rd Jul 2026268 PMAQI
3rd Jul 2026279 PMAQI
3rd Jul 20262410 PMAQI
3rd Jul 20262311 PMAQI
4th Jul 20262212 AMAQI
4th Jul 2026241 AMAQI
4th Jul 2026292 AMAQI
4th Jul 2026283 AMAQI
4th Jul 2026264 AMAQI
4th Jul 2026255 AMAQI

26°C23/30°C

4th Jul 2026266 AMAQI
4th Jul 2026287 AMAQI
4th Jul 2026298 AMAQI
4th Jul 2026279 AMAQI
4th Jul 20262610 AMAQI
4th Jul 20262811 AMAQI
4th Jul 20263012 PMAQI
4th Jul 2026221 PMAQI
4th Jul 2026252 PMAQI
4th Jul 2026283 PMAQI
4th Jul 2026264 PMAQI
4th Jul 2026265 PMAQI
4th Jul 2026256 PMAQI
4th Jul 2026227 PMAQI
4th Jul 2026208 PMAQI
4th Jul 2026219 PMAQI
4th Jul 20262010 PMAQI
4th Jul 20262011 PMAQI
5th Jul 20262112 AMAQI
5th Jul 2026221 AMAQI
5th Jul 2026282 AMAQI
5th Jul 2026293 AMAQI
5th Jul 2026264 AMAQI
5th Jul 2026265 AMAQI

24°C21/27°C

5th Jul 2026276 AMAQI
5th Jul 2026267 AMAQI
5th Jul 2026268 AMAQI
5th Jul 2026269 AMAQI
5th Jul 20262810 AMAQI
5th Jul 20263111 AMAQI
5th Jul 20262812 PMAQI
5th Jul 2026291 PMAQI
5th Jul 2026262 PMAQI
5th Jul 2026263 PMAQI
5th Jul 2026294 PMAQI
5th Jul 2026285 PMAQI
5th Jul 2026246 PMAQI
5th Jul 2026267 PMAQI
5th Jul 2026298 PMAQI
5th Jul 2026379 PMAQI
5th Jul 20262010 PMAQI
5th Jul 20262211 PMAQI
6th Jul 20262012 AMAQI
6th Jul 2026221 AMAQI
6th Jul 2026252 AMAQI
6th Jul 2026273 AMAQI
6th Jul 2026224 AMAQI
6th Jul 2026225 AMAQI

22°C21/23°C

6th Jul 2026226 AMAQI
6th Jul 2026297 AMAQI
6th Jul 2026308 AMAQI
6th Jul 2026289 AMAQI
6th Jul 20263110 AMAQI
6th Jul 20263211 AMAQI
6th Jul 20263212 PMAQI
6th Jul 2026321 PMAQI
6th Jul 2026302 PMAQI
6th Jul 2026323 PMAQI
6th Jul 2026324 PMAQI
6th Jul 2026335 PMAQI
6th Jul 2026286 PMAQI
6th Jul 2026337 PMAQI
6th Jul 2026268 PMAQI
6th Jul 2026269 PMAQI
6th Jul 20262410 PMAQI
6th Jul 20262411 PMAQI
7th Jul 20262212 AMAQI
7th Jul 2026271 AMAQI
7th Jul 2026302 AMAQI
7th Jul 2026293 AMAQI
7th Jul 2026424 AMAQI
7th Jul 2026305 AMAQI

22°C21/24°C

7th Jul 2026326 AMAQI
7th Jul 2026307 AMAQI
7th Jul 2026298 AMAQI
7th Jul 2026279 AMAQI
7th Jul 20262910 AMAQI
7th Jul 20263111 AMAQI
7th Jul 20263312 PMAQI
7th Jul 2026301 PMAQI
7th Jul 2026322 PMAQI
7th Jul 2026303 PMAQI
7th Jul 2026304 PMAQI
7th Jul 2026335 PMAQI
7th Jul 2026306 PMAQI
7th Jul 2026307 PMAQI
7th Jul 2026308 PMAQI
7th Jul 2026289 PMAQI
7th Jul 20262810 PMAQI
7th Jul 20262811 PMAQI
8th Jul 20262612 AMAQI
8th Jul 2026261 AMAQI
8th Jul 2026302 AMAQI
8th Jul 2026313 AMAQI
8th Jul 2026264 AMAQI
8th Jul 2026265 AMAQI

22°C20/25°C

8th Jul 2026226 AMAQI
8th Jul 2026227 AMAQI
8th Jul 2026248 AMAQI
8th Jul 2026249 AMAQI
8th Jul 20262610 AMAQI
8th Jul 20263011 AMAQI
8th Jul 20263212 PMAQI
8th Jul 2026311 PMAQI
8th Jul 2026302 PMAQI
8th Jul 2026303 PMAQI
8th Jul 2026264 PMAQI
8th Jul 2026315 PMAQI
8th Jul 2026306 PMAQI
8th Jul 2026287 PMAQI
8th Jul 2026248 PMAQI
8th Jul 2026269 PMAQI
8th Jul 20262210 PMAQI
8th Jul 20262411 PMAQI
9th Jul 20262212 AMAQI
9th Jul 2026261 AMAQI
9th Jul 2026272 AMAQI
9th Jul 2026263 AMAQI
9th Jul 2026264 AMAQI
9th Jul 2026285 AMAQI

22°C17/27°C

9th Jul 2026276 AMAQI
9th Jul 2026277 AMAQI
9th Jul 2026268 AMAQI
9th Jul 2026309 AMAQI
9th Jul 20263210 AMAQI
9th Jul 20263111 AMAQI
9th Jul 20263012 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026302 PMAQI
9th Jul 2026283 PMAQI
9th Jul 2026304 PMAQI
9th Jul 2026305 PMAQI
9th Jul 2026286 PMAQI
9th Jul 2026307 PMAQI
9th Jul 2026308 PMAQI
9th Jul 2026329 PMAQI
9th Jul 20262810 PMAQI
9th Jul 20262911 PMAQI
10th Jul 20262612 AMAQI
10th Jul 2026241 AMAQI
10th Jul 2026242 AMAQI
10th Jul 2026263 AMAQI
10th Jul 2026324 AMAQI
10th Jul 2026315 AMAQI

24°C21/28°C

10th Jul 2026326 AMAQI
10th Jul 2026387 AMAQI
10th Jul 2026268 AMAQI
10th Jul 2026259 AMAQI
10th Jul 20262810 AMAQI
10th Jul 20263811 AMAQI
10th Jul 20263812 PMAQI
10th Jul 2026291 PMAQI
10th Jul 2026362 PMAQI
10th Jul 2026333 PMAQI
10th Jul 2026424 PMAQI
10th Jul 2026295 PMAQI
10th Jul 2026276 PMAQI
10th Jul 2026287 PMAQI
10th Jul 2026288 PMAQI
10th Jul 2026369 PMAQI
10th Jul 20263010 PMAQI
10th Jul 20263011 PMAQI
11th Jul 20262612 AMAQI
11th Jul 2026231 AMAQI
11th Jul 2026232 AMAQI
11th Jul 2026303 AMAQI
11th Jul 2026334 AMAQI
11th Jul 2026325 AMAQI

23°C21/25°C

11th Jul 2026546 AMAQI
11th Jul 2026277 AMAQI
11th Jul 2026308 AMAQI
11th Jul 2026369 AMAQI
11th Jul 20263210 AMAQI
11th Jul 20263411 AMAQI
11th Jul 20263512 PMAQI
11th Jul 2026341 PMAQI
11th Jul 2026362 PMAQI
11th Jul 2026303 PMAQI
11th Jul 2026324 PMAQI
11th Jul 2026335 PMAQI
11th Jul 2026406 PMAQI
11th Jul 2026307 PMAQI
11th Jul 2026328 PMAQI
11th Jul 2026309 PMAQI
11th Jul 20262910 PMAQI
11th Jul 20262811 PMAQI
12th Jul 20264012 AMAQI
12th Jul 2026231 AMAQI
12th Jul 2026262 AMAQI
12th Jul 2026253 AMAQI
12th Jul 2026324 AMAQI
12th Jul 2026405 AMAQI

24°C22/27°C

12th Jul 2026316 AMAQI
12th Jul 2026287 AMAQI
12th Jul 2026568 AMAQI
12th Jul 2026589 AMAQI
12th Jul 20266210 AMAQI
12th Jul 20265711 AMAQI
12th Jul 20265612 PMAQI
12th Jul 2026591 PMAQI
12th Jul 2026542 PMAQI
12th Jul 2026463 PMAQI
12th Jul 2026444 PMAQI
12th Jul 2026405 PMAQI
12th Jul 2026346 PMAQI
12th Jul 2026297 PMAQI
12th Jul 2026318 PMAQI
12th Jul 2026309 PMAQI
12th Jul 20262810 PMAQI
12th Jul 20263811 PMAQI
13th Jul 20262312 AMAQI
13th Jul 2026221 AMAQI
13th Jul 2026242 AMAQI
13th Jul 2026343 AMAQI
13th Jul 2026304 AMAQI
13th Jul 2026325 AMAQI

24°C20/27°C

13th Jul 2026336 AMAQI
13th Jul 2026347 AMAQI
13th Jul 2026408 AMAQI
13th Jul 2026349 AMAQI
13th Jul 20264210 AMAQI
13th Jul 20263711 AMAQI
13th Jul 20263612 PMAQI
13th Jul 2026401 PMAQI
13th Jul 2026332 PMAQI
13th Jul 2026263 PMAQI
13th Jul 2026384 PMAQI
13th Jul 2026375 PMAQI
13th Jul 2026316 PMAQI
13th Jul 2026307 PMAQI
13th Jul 2026388 PMAQI
13th Jul 2026369 PMAQI
13th Jul 20262610 PMAQI
13th Jul 20262711 PMAQI
14th Jul 20262212 AMAQI
14th Jul 2026221 AMAQI
14th Jul 2026202 AMAQI
14th Jul 2026243 AMAQI
14th Jul 2026304 AMAQI
14th Jul 2026305 AMAQI

25°C20/29°C

14th Jul 2026306 AMAQI
14th Jul 2026307 AMAQI
14th Jul 2026318 AMAQI
14th Jul 2026349 AMAQI
14th Jul 20263610 AMAQI
14th Jul 20263411 AMAQI
14th Jul 20263812 PMAQI
14th Jul 2026331 PMAQI
14th Jul 2026342 PMAQI
14th Jul 2026293 PMAQI
14th Jul 2026324 PMAQI
14th Jul 2026245 PMAQI
14th Jul 2026316 PMAQI
14th Jul 2026327 PMAQI
14th Jul 2026308 PMAQI
14th Jul 2026309 PMAQI
14th Jul 20262810 PMAQI
14th Jul 20262611 PMAQI
15th Jul 20262012 AMAQI
15th Jul 2026201 AMAQI
15th Jul 2026212 AMAQI
15th Jul 2026223 AMAQI
15th Jul 2026264 AMAQI
15th Jul 2026265 AMAQI

28°C23/33°C

15th Jul 2026246 AMAQI
15th Jul 2026767 AMAQI
15th Jul 2026268 AMAQI
15th Jul 2026299 AMAQI
15th Jul 20262410 AMAQI
15th Jul 20262711 AMAQI
15th Jul 20262612 PMAQI
15th Jul 2026301 PMAQI
15th Jul 2026292 PMAQI
15th Jul 2026313 PMAQI
15th Jul 20261044 PMAQI
15th Jul 2026495 PMAQI
15th Jul 2026786 PMAQI
15th Jul 2026887 PMAQI
15th Jul 2026848 PMAQI
15th Jul 2026859 PMAQI
15th Jul 20268410 PMAQI
15th Jul 20268511 PMAQI
16th Jul 20268212 AMAQI
16th Jul 2026781 AMAQI
16th Jul 2026722 AMAQI
16th Jul 2026803 AMAQI
16th Jul 2026744 AMAQI
16th Jul 2026845 AMAQI

26°C24/28°C

16th Jul 2026876 AMAQI
16th Jul 2026847 AMAQI
16th Jul 2026838 AMAQI
16th Jul 2026819 AMAQI
16th Jul 20268610 AMAQI
16th Jul 20268911 AMAQI
16th Jul 20268912 PMAQI
16th Jul 2026951 PMAQI
16th Jul 2026862 PMAQI
16th Jul 2026853 PMAQI
16th Jul 2026864 PMAQI
16th Jul 2026885 PMAQI
16th Jul 2026826 PMAQI
16th Jul 2026767 PMAQI
16th Jul 2026868 PMAQI
16th Jul 2026909 PMAQI
16th Jul 20268210 PMAQI
16th Jul 20268211 PMAQI
17th Jul 20267812 AMAQI
17th Jul 2026821 AMAQI
17th Jul 2026742 AMAQI
17th Jul 2026623 AMAQI
17th Jul 2026694 AMAQI
17th Jul 2026695 AMAQI

24°C21/28°C

17th Jul 2026676 AMAQI
17th Jul 2026727 AMAQI
17th Jul 2026718 AMAQI
17th Jul 2026759 AMAQI
17th Jul 20267310 AMAQI
17th Jul 20267011 AMAQI
17th Jul 20268112 PMAQI
17th Jul 2026811 PMAQI
17th Jul 2026742 PMAQI
17th Jul 2026663 PMAQI
17th Jul 2026714 PMAQI
17th Jul 2026705 PMAQI
17th Jul 2026656 PMAQI
17th Jul 2026687 PMAQI
17th Jul 2026668 PMAQI
17th Jul 2026659 PMAQI
17th Jul 20266910 PMAQI
17th Jul 20266211 PMAQI
18th Jul 20266412 AMAQI
18th Jul 2026631 AMAQI
18th Jul 2026602 AMAQI
18th Jul 2026623 AMAQI
18th Jul 2026624 AMAQI
18th Jul 2026705 AMAQI

24°C19/28°C

18th Jul 2026596 AMAQI
18th Jul 2026697 AMAQI
18th Jul 2026648 AMAQI
18th Jul 2026649 AMAQI
18th Jul 20266710 AMAQI
18th Jul 20266911 AMAQI
18th Jul 20265712 PMAQI
18th Jul 2026521 PMAQI
18th Jul 2026502 PMAQI
18th Jul 2026463 PMAQI
18th Jul 2026424 PMAQI
18th Jul 2026405 PMAQI
18th Jul 2026586 PMAQI
18th Jul 2026607 PMAQI
18th Jul 2026668 PMAQI
18th Jul 2026569 PMAQI
18th Jul 20266010 PMAQI
18th Jul 20267011 PMAQI
19th Jul 20266412 AMAQI
19th Jul 2026621 AMAQI
19th Jul 2026622 AMAQI
19th Jul 2026553 AMAQI
19th Jul 2026514 AMAQI
19th Jul 2026605 AMAQI

25°C22/30°C

19th Jul 2026686 AMAQI
19th Jul 2026667 AMAQI
19th Jul 2026758 AMAQI
19th Jul 2026749 AMAQI
19th Jul 20267310 AMAQI
19th Jul 20267411 AMAQI
19th Jul 20268012 PMAQI
19th Jul 2026841 PMAQI
19th Jul 2026732 PMAQI
19th Jul 2026743 PMAQI
19th Jul 2026824 PMAQI
19th Jul 2026805 PMAQI
19th Jul 2026726 PMAQI
19th Jul 2026767 PMAQI
19th Jul 2026648 PMAQI
19th Jul 2026569 PMAQI
19th Jul 20266210 PMAQI
19th Jul 20266211 PMAQI
20th Jul 20266412 AMAQI
20th Jul 2026641 AMAQI
20th Jul 2026642 AMAQI
20th Jul 2026643 AMAQI
20th Jul 2026634 AMAQI
20th Jul 2026625 AMAQI

21°C20/23°C

20th Jul 2026646 AMAQI
20th Jul 2026677 AMAQI
20th Jul 2026658 AMAQI
20th Jul 2026679 AMAQI
20th Jul 20267010 AMAQI
20th Jul 20267411 AMAQI
20th Jul 20267212 PMAQI
20th Jul 2026701 PMAQI
20th Jul 2026672 PMAQI
20th Jul 2026673 PMAQI
20th Jul 2026744 PMAQI
20th Jul 2026745 PMAQI
20th Jul 2026726 PMAQI
20th Jul 2026817 PMAQI
20th Jul 2026868 PMAQI
20th Jul 2026789 PMAQI
20th Jul 20267010 PMAQI
21st Jul 20266012 AMAQI
21st Jul 2026691 AMAQI
21st Jul 2026642 AMAQI
21st Jul 2026593 AMAQI
21st Jul 2026624 AMAQI
21st Jul 2026745 AMAQI

22°C16/28°C

21st Jul 2026696 AMAQI
21st Jul 2026697 AMAQI
21st Jul 2026698 AMAQI
21st Jul 2026679 AMAQI
21st Jul 20266910 AMAQI
21st Jul 20268111 AMAQI
21st Jul 20267812 PMAQI
21st Jul 2026721 PMAQI
21st Jul 2026762 PMAQI
21st Jul 2026553 PMAQI
21st Jul 2026424 PMAQI
21st Jul 2026365 PMAQI
21st Jul 2026366 PMAQI
21st Jul 2026277 PMAQI
21st Jul 2026338 PMAQI
21st Jul 2026219 PMAQI
21st Jul 20262710 PMAQI
21st Jul 20262511 PMAQI
22nd Jul 20262112 AMAQI
22nd Jul 2026331 AMAQI
22nd Jul 2026522 AMAQI
22nd Jul 2026423 AMAQI
22nd Jul 2026484 AMAQI
22nd Jul 2026465 AMAQI

24°C20/28°C

22nd Jul 2026406 AMAQI
22nd Jul 2026337 AMAQI
22nd Jul 2026218 AMAQI
22nd Jul 2026259 AMAQI
22nd Jul 20262910 AMAQI
22nd Jul 20262711 AMAQI
22nd Jul 20264012 PMAQI
22nd Jul 2026231 PMAQI
22nd Jul 2026332 PMAQI
22nd Jul 2026293 PMAQI
22nd Jul 2026254 PMAQI
22nd Jul 2026255 PMAQI
22nd Jul 2026216 PMAQI
22nd Jul 2026287 PMAQI
22nd Jul 2026278 PMAQI
22nd Jul 2026279 PMAQI
22nd Jul 20262310 PMAQI
22nd Jul 20262911 PMAQI
23rd Jul 20264512 AMAQI
23rd Jul 2026221 AMAQI
23rd Jul 2026232 AMAQI
23rd Jul 2026213 AMAQI
23rd Jul 2026464 AMAQI
23rd Jul 2026225 AMAQI

19°C16/23°C

23rd Jul 2026256 AMAQI
23rd Jul 2026217 AMAQI
23rd Jul 2026278 AMAQI
23rd Jul 2026339 AMAQI
23rd Jul 20263310 AMAQI
23rd Jul 20264211 AMAQI
23rd Jul 20264512 PMAQI
23rd Jul 2026331 PMAQI
23rd Jul 2026252 PMAQI
23rd Jul 2026273 PMAQI
23rd Jul 2026264 PMAQI
23rd Jul 2026335 PMAQI
23rd Jul 2026236 PMAQI
23rd Jul 2026217 PMAQI
23rd Jul 2026348 PMAQI
23rd Jul 2026349 PMAQI
23rd Jul 20262610 PMAQI
23rd Jul 20262311 PMAQI
24th Jul 20263612 AMAQI
24th Jul 2026461 AMAQI
24th Jul 2026292 AMAQI
24th Jul 2026343 AMAQI
24th Jul 2026244 AMAQI
24th Jul 2026255 AMAQI

20°C15/25°C

24th Jul 2026296 AMAQI
24th Jul 2026267 AMAQI
24th Jul 2026288 AMAQI
24th Jul 2026299 AMAQI
24th Jul 20262810 AMAQI
24th Jul 20263011 AMAQI
24th Jul 20263812 PMAQI
24th Jul 2026251 PMAQI
24th Jul 2026332 PMAQI
24th Jul 2026383 PMAQI
24th Jul 2026254 PMAQI
24th Jul 2026275 PMAQI
24th Jul 2026366 PMAQI
24th Jul 2026297 PMAQI
24th Jul 2026258 PMAQI
24th Jul 2026219 PMAQI
24th Jul 20262910 PMAQI
24th Jul 20262911 PMAQI
25th Jul 20262912 AMAQI
25th Jul 2026441 AMAQI
25th Jul 2026402 AMAQI
25th Jul 2026273 AMAQI
25th Jul 2026384 AMAQI
25th Jul 2026235 AMAQI

21°C16/26°C

25th Jul 2026296 AMAQI
25th Jul 2026427 AMAQI
25th Jul 2026388 AMAQI
25th Jul 2026389 AMAQI
25th Jul 20263410 AMAQI
25th Jul 20262511 AMAQI
25th Jul 20262312 PMAQI
25th Jul 2026211 PMAQI
25th Jul 2026252 PMAQI
25th Jul 2026253 PMAQI
25th Jul 2026604 PMAQI
25th Jul 2026535 PMAQI
25th Jul 2026386 PMAQI
25th Jul 2026317 PMAQI
25th Jul 2026568 PMAQI
25th Jul 2026579 PMAQI
25th Jul 20265810 PMAQI
25th Jul 20264811 PMAQI
26th Jul 20264812 AMAQI
26th Jul 2026521 AMAQI
26th Jul 2026552 AMAQI
26th Jul 2026543 AMAQI
26th Jul 2026524 AMAQI
26th Jul 2026515 AMAQI

22°C18/27°C

26th Jul 2026546 AMAQI
26th Jul 2026537 AMAQI
26th Jul 2026528 AMAQI
26th Jul 2026539 AMAQI
26th Jul 20265110 AMAQI
26th Jul 20264811 AMAQI
26th Jul 20264912 PMAQI
26th Jul 2026481 PMAQI
26th Jul 2026462 PMAQI
26th Jul 2026463 PMAQI
26th Jul 2026464 PMAQI
26th Jul 2026515 PMAQI
26th Jul 2026516 PMAQI
26th Jul 2026517 PMAQI
26th Jul 2026488 PMAQI
26th Jul 2026509 PMAQI
26th Jul 20264910 PMAQI
26th Jul 20264811 PMAQI
27th Jul 20265112 AMAQI
27th Jul 2026531 AMAQI
27th Jul 2026532 AMAQI
27th Jul 2026553 AMAQI
27th Jul 2026544 AMAQI
27th Jul 2026555 AMAQI

23°C20/27°C

27th Jul 2026596 AMAQI
27th Jul 2026577 AMAQI
27th Jul 2026598 AMAQI
27th Jul 2026629 AMAQI
27th Jul 20266210 AMAQI
27th Jul 20266211 AMAQI
27th Jul 20265912 PMAQI
27th Jul 2026591 PMAQI
27th Jul 2026592 PMAQI
27th Jul 2026603 PMAQI
27th Jul 2026624 PMAQI
27th Jul 2026605 PMAQI
27th Jul 2026566 PMAQI
27th Jul 2026557 PMAQI
27th Jul 2026558 PMAQI
27th Jul 2026579 PMAQI
27th Jul 20265910 PMAQI
27th Jul 20266211 PMAQI
28th Jul 20266212 AMAQI
28th Jul 2026621 AMAQI
28th Jul 2026682 AMAQI
28th Jul 2026623 AMAQI
28th Jul 2026584 AMAQI
28th Jul 2026645 AMAQI

25°C20/29°C

28th Jul 2026686 AMAQI
28th Jul 2026687 AMAQI
28th Jul 2026718 AMAQI
28th Jul 2026669 AMAQI
28th Jul 20266710 AMAQI
28th Jul 20266211 AMAQI
28th Jul 20266312 PMAQI
28th Jul 2026631 PMAQI
28th Jul 2026602 PMAQI
28th Jul 2026543 PMAQI
28th Jul 2026534 PMAQI
28th Jul 2026485 PMAQI
28th Jul 2026466 PMAQI
28th Jul 2026507 PMAQI
28th Jul 2026448 PMAQI
28th Jul 2026449 PMAQI
28th Jul 20264210 PMAQI
28th Jul 20264211 PMAQI
29th Jul 20263812 AMAQI
29th Jul 2026231 AMAQI
29th Jul 2026272 AMAQI
29th Jul 2026233 AMAQI
29th Jul 2026234 AMAQI
29th Jul 2026235 AMAQI

22°C21/24°C

29th Jul 2026246 AMAQI
29th Jul 2026267 AMAQI
29th Jul 2026228 AMAQI
29th Jul 2026259 AMAQI
29th Jul 20264010 AMAQI
29th Jul 20263211 AMAQI
29th Jul 20263312 PMAQI
29th Jul 2026421 PMAQI
29th Jul 2026342 PMAQI
29th Jul 2026293 PMAQI
29th Jul 2026334 PMAQI
29th Jul 2026425 PMAQI
29th Jul 2026366 PMAQI
29th Jul 2026507 PMAQI
29th Jul 2026328 PMAQI
29th Jul 2026349 PMAQI
29th Jul 20262210 PMAQI
29th Jul 20262911 PMAQI
30th Jul 20264012 AMAQI
30th Jul 2026561 AMAQI
30th Jul 2026402 AMAQI
30th Jul 2026253 AMAQI
30th Jul 2026334 AMAQI
30th Jul 2026295 AMAQI

22°C20/26°C

30th Jul 2026246 AMAQI
6 AM
30th Jul 2026237 AMAQI
30th Jul 2026238 AMAQI
30th Jul 2026449 AMAQI
30th Jul 20263910 AMAQI
30th Jul 20262111 AMAQI
30th Jul 20262512 PMAQI
30th Jul 2026291 PMAQI
1 PM
30th Jul 2026382 PMAQI
30th Jul 2026443 PMAQI
30th Jul 2026464 PMAQI
30th Jul 2026485 PMAQI
30th Jul 2026446 PMAQI
30th Jul 2026467 PMAQI
30th Jul 2026468 PMAQI
30th Jul 2026469 PMAQI
9 PM
30th Jul 20264010 PMAQI
30th Jul 20263311 PMAQI
1 AM
5 AM

23°C20/26°C

Day time
Avg. Highest Time
10 AM - 12 PM

46AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
6 PM - 9 PM

42AQI

4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 10 AM to 12 PM (Avg. 46), while the lowest AQI was between 6 PM to 9 PM (Avg. 42).
Night time
Avg. Highest Time
4 AM - 5 AM

41AQI

2 hours / Day
60 hours / Month
Avg. Lowest Time
10 PM - 11 PM

39AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 4 AM to 5 AM (Avg. 41), while the lowest AQI was between 10 PM to 11 PM (Avg. 39).

2026 Days Vs Air Quality

Sarnia, Ontario, Canada

2026

90%

187

10%

21

Total number of days with different AQI categories in last 211 days in 2026 (154 days remaining)

Good
187 Days
Moderate
21 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 90%

Health Risk Level:

Very Low

In 2026, 90% of 211 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

Sarnia, Ontario, Canada

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
19AQI (US)
2nd January 2026
23AQI (US)
3rd January 2026
33AQI (US)
4th January 2026
32AQI (US)
5th January 2026
50AQI (US)
6th January 2026
75AQI (US)
7th January 2026
50AQI (US)
8th January 2026
53AQI (US)
9th January 2026
25AQI (US)
10th January 2026
29AQI (US)
11th January 2026
22AQI (US)
12th January 2026
27AQI (US)
13th January 2026
36AQI (US)
14th January 2026
21AQI (US)
15th January 2026
13AQI (US)
16th January 2026
32AQI (US)
17th January 2026
44AQI (US)
18th January 2026
30AQI (US)
19th January 2026
32AQI (US)
20th January 2026
29AQI (US)
21st January 2026
37AQI (US)
22nd January 2026
60AQI (US)
23rd January 2026
60AQI (US)
24th January 2026
48AQI (US)
25th January 2026
50AQI (US)
26th January 2026
48AQI (US)
27th January 2026
38AQI (US)
28th January 2026
44AQI (US)
29th January 2026
50AQI (US)
30th January 2026
59AQI (US)
31st January 2026
44AQI (US)
1st February 2026
46AQI (US)
2nd February 2026
51AQI (US)
3rd February 2026
48AQI (US)
4th February 2026
44AQI (US)
5th February 2026
51AQI (US)
6th February 2026
50AQI (US)
7th February 2026
40AQI (US)
8th February 2026
43AQI (US)
9th February 2026
47AQI (US)
10th February 2026
45AQI (US)
11th February 2026
40AQI (US)
12th February 2026
38AQI (US)
13th February 2026
47AQI (US)
14th February 2026
48AQI (US)
15th February 2026
45AQI (US)
16th February 2026
46AQI (US)
17th February 2026
58AQI (US)
18th February 2026
43AQI (US)
19th February 2026
42AQI (US)
20th February 2026
41AQI (US)
21st February 2026
37AQI (US)
22nd February 2026
37AQI (US)
23rd February 2026
37AQI (US)
24th February 2026
46AQI (US)
25th February 2026
45AQI (US)
26th February 2026
34AQI (US)
27th February 2026
36AQI (US)
28th February 2026
35AQI (US)
1st March 2026
38AQI (US)
2nd March 2026
61AQI (US)
3rd March 2026
45AQI (US)
4th March 2026
47AQI (US)
5th March 2026
42AQI (US)
6th March 2026
35AQI (US)
7th March 2026
38AQI (US)
8th March 2026
38AQI (US)
9th March 2026
36AQI (US)
10th March 2026
34AQI (US)
11th March 2026
42AQI (US)
12th March 2026
38AQI (US)
13th March 2026
40AQI (US)
14th March 2026
36AQI (US)
15th March 2026
32AQI (US)
16th March 2026
38AQI (US)
17th March 2026
35AQI (US)
18th March 2026
31AQI (US)
19th March 2026
39AQI (US)
20th March 2026
42AQI (US)
21st March 2026
40AQI (US)
22nd March 2026
36AQI (US)
23rd March 2026
39AQI (US)
24th March 2026
37AQI (US)
25th March 2026
32AQI (US)
26th March 2026
37AQI (US)
27th March 2026
28AQI (US)
28th March 2026
31AQI (US)
29th March 2026
29AQI (US)
30th March 2026
26AQI (US)
31st March 2026
29AQI (US)
1st April 2026
30AQI (US)
2nd April 2026
30AQI (US)
3rd April 2026
29AQI (US)
4th April 2026
32AQI (US)
5th April 2026
30AQI (US)
6th April 2026
32AQI (US)
7th April 2026
28AQI (US)
8th April 2026
34AQI (US)
9th April 2026
29AQI (US)
10th April 2026
32AQI (US)
11th April 2026
30AQI (US)
12th April 2026
29AQI (US)
13th April 2026
32AQI (US)
14th April 2026
37AQI (US)
15th April 2026
37AQI (US)
16th April 2026
32AQI (US)
17th April 2026
18th April 2026
29AQI (US)
19th April 2026
32AQI (US)
20th April 2026
29AQI (US)
21st April 2026
28AQI (US)
22nd April 2026
23rd April 2026
24AQI (US)
24th April 2026
24AQI (US)
25th April 2026
28AQI (US)
26th April 2026
32AQI (US)
27th April 2026
27AQI (US)
28th April 2026
27AQI (US)
29th April 2026
24AQI (US)
30th April 2026
26AQI (US)
1st May 2026
26AQI (US)
2nd May 2026
23AQI (US)
3rd May 2026
23AQI (US)
4th May 2026
35AQI (US)
5th May 2026
37AQI (US)
6th May 2026
31AQI (US)
7th May 2026
26AQI (US)
8th May 2026
30AQI (US)
9th May 2026
10th May 2026
31AQI (US)
11th May 2026
27AQI (US)
12th May 2026
26AQI (US)
13th May 2026
35AQI (US)
14th May 2026
22AQI (US)
15th May 2026
46AQI (US)
16th May 2026
52AQI (US)
17th May 2026
56AQI (US)
18th May 2026
57AQI (US)
19th May 2026
54AQI (US)
20th May 2026
50AQI (US)
21st May 2026
44AQI (US)
22nd May 2026
42AQI (US)
23rd May 2026
50AQI (US)
24th May 2026
48AQI (US)
25th May 2026
45AQI (US)
26th May 2026
29AQI (US)
27th May 2026
28AQI (US)
28th May 2026
23AQI (US)
29th May 2026
24AQI (US)
30th May 2026
22AQI (US)
31st May 2026
28AQI (US)
1st June 2026
30AQI (US)
2nd June 2026
27AQI (US)
3rd June 2026
34AQI (US)
4th June 2026
25AQI (US)
5th June 2026
34AQI (US)
6th June 2026
27AQI (US)
7th June 2026
24AQI (US)
8th June 2026
26AQI (US)
9th June 2026
26AQI (US)
10th June 2026
27AQI (US)
11th June 2026
26AQI (US)
12th June 2026
26AQI (US)
13th June 2026
24AQI (US)
14th June 2026
22AQI (US)
15th June 2026
24AQI (US)
16th June 2026
26AQI (US)
17th June 2026
27AQI (US)
18th June 2026
26AQI (US)
19th June 2026
24AQI (US)
20th June 2026
23AQI (US)
21st June 2026
20AQI (US)
22nd June 2026
24AQI (US)
23rd June 2026
23AQI (US)
24th June 2026
24AQI (US)
25th June 2026
26AQI (US)
26th June 2026
27AQI (US)
27th June 2026
31AQI (US)
28th June 2026
27AQI (US)
29th June 2026
24AQI (US)
30th June 2026
28AQI (US)
1st July 2026
46AQI (US)
2nd July 2026
45AQI (US)
3rd July 2026
34AQI (US)
4th July 2026
25AQI (US)
5th July 2026
27AQI (US)
6th July 2026
28AQI (US)
7th July 2026
30AQI (US)
8th July 2026
27AQI (US)
9th July 2026
28AQI (US)
10th July 2026
31AQI (US)
11th July 2026
32AQI (US)
12th July 2026
40AQI (US)
13th July 2026
33AQI (US)
14th July 2026
30AQI (US)
15th July 2026
46AQI (US)
16th July 2026
84AQI (US)
17th July 2026
71AQI (US)
18th July 2026
60AQI (US)
19th July 2026
69AQI (US)
20th July 2026
70AQI (US)
21st July 2026
56AQI (US)
22nd July 2026
31AQI (US)
23rd July 2026
30AQI (US)
24th July 2026
30AQI (US)
25th July 2026
38AQI (US)
26th July 2026
50AQI (US)
27th July 2026
58AQI (US)
28th July 2026
58AQI (US)
29th July 2026
31AQI (US)
30th July 2026
37AQI (US)
31st July 2026
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

39AQI (US)

44AQI (US)

37AQI (US)

30AQI (US)

36AQI (US)

26AQI (US)

43AQI (US)

No. of days

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

202636AQI (US)

26
5
25
3
30
1
28
26
4
30
22
8
187
21

Highest AQI (US) recorded in

February

44AQI (US)

Lowest AQI (US) recorded in

June

26AQI (US)

202538AQI (US)

5
30
31
18
12
22
8
1
18
11
2
26
4
25
6
26
4
24
7
225
52
3

Highest AQI (US) recorded in

June

50AQI (US)

Lowest AQI (US) recorded in

May

23AQI (US)

Most & Least Polluted Years Over the Last 2 Years

Most Polluted Year Recorded
2025(Avg.)
38AQI (US)
Least Polluted Year Recorded
2026(Avg.)
36AQI (US)

Sarnia's annual 2026 AQI (US) (36) shows an average percentage change of -5.2% (improved AQI (US)) compared to previous years: 2025 (38).