Ontario, Montreal, Quebec, 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+
August Air Quality Analysis
Ontario, Montreal, Quebec, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
5th Aug 2021
78AQILowest AQI recorded on
14th Aug 2023
10AQISame Day Analysis (12th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 56 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 12th Aug - 13th Aug 2025
Ontario, Montreal, Quebec, Canada
AQI
Day
Night
.
5 AM12th Aug 2025
8 PM
4 AM13th Aug 2025
Day time
Avg. Highest Time
7PM12th Aug
58AQI
Avg. Lowest Time
9AM12th Aug
54AQI
Night time
Avg. Highest Time
9PM12th Aug
56AQI
Avg. Lowest Time
10PM12th Aug
55AQI
In the last 24 hours,
Ontario's AQI reached its highest point of 58 at 7 PM during the Day, while the lowest point, 54, was recorded at 9 AM during the Day between 12th Aug and 13th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Ontario, Montreal, Quebec, Canada
JulAug
14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th
Day
Night
14th Jul 2025375 AMAQI
14th Jul 2025366 AMAQI
14th Jul 2025357 AMAQI
14th Jul 2025358 AMAQI
14th Jul 2025369 AMAQI
14th Jul 20254310 AMAQI
14th Jul 20255011 AMAQI
14th Jul 20255212 PMAQI
14th Jul 2025521 PMAQI
14th Jul 2025512 PMAQI
14th Jul 2025423 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025425 PMAQI
14th Jul 2025436 PMAQI
14th Jul 2025437 PMAQI
14th Jul 2025438 PMAQI
14th Jul 2025469 PMAQI
14th Jul 20254610 PMAQI
14th Jul 20254111 PMAQI
15th Jul 20254012 AMAQI
15th Jul 2025421 AMAQI
15th Jul 2025392 AMAQI
15th Jul 2025263 AMAQI
15th Jul 2025244 AMAQI
27°C22/32°C
15th Jul 2025295 AMAQI
15th Jul 2025326 AMAQI
15th Jul 2025387 AMAQI
15th Jul 2025428 AMAQI
15th Jul 2025509 AMAQI
15th Jul 20255010 AMAQI
15th Jul 20255011 AMAQI
15th Jul 20255012 PMAQI
15th Jul 2025421 PMAQI
15th Jul 2025442 PMAQI
15th Jul 2025473 PMAQI
15th Jul 2025474 PMAQI
15th Jul 2025485 PMAQI
15th Jul 2025466 PMAQI
15th Jul 2025447 PMAQI
15th Jul 2025448 PMAQI
15th Jul 2025439 PMAQI
15th Jul 20254310 PMAQI
15th Jul 20254411 PMAQI
16th Jul 20254312 AMAQI
16th Jul 2025431 AMAQI
16th Jul 2025442 AMAQI
16th Jul 2025413 AMAQI
16th Jul 2025494 AMAQI
27°C20/33°C
16th Jul 2025505 AMAQI
16th Jul 2025496 AMAQI
16th Jul 2025517 AMAQI
16th Jul 2025548 AMAQI
16th Jul 2025519 AMAQI
16th Jul 20255410 AMAQI
16th Jul 20255311 AMAQI
16th Jul 20255212 PMAQI
16th Jul 2025531 PMAQI
16th Jul 2025562 PMAQI
16th Jul 2025553 PMAQI
16th Jul 2025534 PMAQI
16th Jul 2025525 PMAQI
16th Jul 2025526 PMAQI
16th Jul 2025527 PMAQI
16th Jul 2025528 PMAQI
16th Jul 2025529 PMAQI
16th Jul 20255210 PMAQI
16th Jul 20255211 PMAQI
17th Jul 20255212 AMAQI
17th Jul 2025511 AMAQI
17th Jul 2025512 AMAQI
17th Jul 2025583 AMAQI
17th Jul 2025594 AMAQI
29°C22/36°C
17th Jul 2025555 AMAQI
17th Jul 2025536 AMAQI
17th Jul 2025487 AMAQI
17th Jul 2025488 AMAQI
17th Jul 2025499 AMAQI
17th Jul 20254810 AMAQI
17th Jul 20254711 AMAQI
17th Jul 20254412 PMAQI
17th Jul 2025441 PMAQI
17th Jul 2025432 PMAQI
17th Jul 2025423 PMAQI
17th Jul 2025454 PMAQI
17th Jul 2025445 PMAQI
17th Jul 2025426 PMAQI
17th Jul 2025407 PMAQI
17th Jul 2025398 PMAQI
17th Jul 2025479 PMAQI
17th Jul 20254610 PMAQI
17th Jul 20253411 PMAQI
18th Jul 20253212 AMAQI
18th Jul 2025321 AMAQI
18th Jul 2025272 AMAQI
18th Jul 2025163 AMAQI
18th Jul 2025184 AMAQI
27°C18/31°C
18th Jul 2025165 AMAQI
18th Jul 2025166 AMAQI
18th Jul 2025167 AMAQI
18th Jul 2025168 AMAQI
18th Jul 2025169 AMAQI
18th Jul 20251810 AMAQI
18th Jul 20251811 AMAQI
18th Jul 20251912 PMAQI
18th Jul 2025201 PMAQI
18th Jul 2025212 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025245 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025267 PMAQI
18th Jul 2025278 PMAQI
18th Jul 2025239 PMAQI
18th Jul 20252310 PMAQI
18th Jul 20253011 PMAQI
19th Jul 20253012 AMAQI
19th Jul 2025301 AMAQI
19th Jul 2025302 AMAQI
19th Jul 2025303 AMAQI
19th Jul 2025324 AMAQI
21°C14/28°C
19th Jul 2025305 AMAQI
19th Jul 2025306 AMAQI
19th Jul 2025317 AMAQI
19th Jul 2025298 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20252710 AMAQI
19th Jul 20252711 AMAQI
19th Jul 20253112 PMAQI
19th Jul 2025341 PMAQI
19th Jul 2025392 PMAQI
19th Jul 2025443 PMAQI
19th Jul 2025484 PMAQI
19th Jul 2025425 PMAQI
19th Jul 2025426 PMAQI
19th Jul 2025437 PMAQI
19th Jul 2025428 PMAQI
19th Jul 2025389 PMAQI
19th Jul 20253710 PMAQI
19th Jul 20254711 PMAQI
20th Jul 20254312 AMAQI
20th Jul 2025421 AMAQI
20th Jul 2025442 AMAQI
20th Jul 2025453 AMAQI
20th Jul 2025454 AMAQI
22°C15/29°C
20th Jul 2025435 AMAQI
20th Jul 2025466 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025408 AMAQI
20th Jul 2025389 AMAQI
20th Jul 20253610 AMAQI
20th Jul 20253311 AMAQI
20th Jul 20253312 PMAQI
20th Jul 2025321 PMAQI
20th Jul 2025322 PMAQI
20th Jul 2025323 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025345 PMAQI
20th Jul 2025336 PMAQI
20th Jul 2025337 PMAQI
20th Jul 2025358 PMAQI
20th Jul 2025409 PMAQI
20th Jul 20253910 PMAQI
20th Jul 20254111 PMAQI
21st Jul 20254312 AMAQI
21st Jul 2025381 AMAQI
21st Jul 2025382 AMAQI
21st Jul 2025483 AMAQI
21st Jul 2025544 AMAQI
22°C17/29°C
21st Jul 2025465 AMAQI
21st Jul 2025356 AMAQI
21st Jul 2025307 AMAQI
21st Jul 2025288 AMAQI
21st Jul 2025289 AMAQI
21st Jul 20252610 AMAQI
21st Jul 20252411 AMAQI
21st Jul 20252312 PMAQI
21st Jul 2025201 PMAQI
21st Jul 2025202 PMAQI
21st Jul 2025193 PMAQI
21st Jul 2025204 PMAQI
21st Jul 2025225 PMAQI
21st Jul 2025236 PMAQI
21st Jul 2025237 PMAQI
21st Jul 2025228 PMAQI
21st Jul 2025249 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252011 PMAQI
22nd Jul 20252112 AMAQI
22nd Jul 2025221 AMAQI
22nd Jul 2025212 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025184 AMAQI
19°C15/24°C
22nd Jul 2025185 AMAQI
22nd Jul 2025176 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025168 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025183 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025195 PMAQI
22nd Jul 2025196 PMAQI
22nd Jul 2025197 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025189 PMAQI
22nd Jul 20251810 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252112 AMAQI
23rd Jul 2025231 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025233 AMAQI
23rd Jul 2025244 AMAQI
19°C12/25°C
23rd Jul 2025235 AMAQI
23rd Jul 2025246 AMAQI
23rd Jul 2025247 AMAQI
23rd Jul 2025278 AMAQI
23rd Jul 2025299 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20252911 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025261 PMAQI
23rd Jul 2025242 PMAQI
23rd Jul 2025233 PMAQI
23rd Jul 2025224 PMAQI
23rd Jul 2025225 PMAQI
23rd Jul 2025236 PMAQI
23rd Jul 2025247 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252611 PMAQI
24th Jul 20252612 AMAQI
24th Jul 2025281 AMAQI
24th Jul 2025302 AMAQI
24th Jul 2025273 AMAQI
24th Jul 2025264 AMAQI
22°C13/30°C
24th Jul 2025265 AMAQI
24th Jul 2025276 AMAQI
24th Jul 2025287 AMAQI
24th Jul 2025288 AMAQI
24th Jul 2025329 AMAQI
24th Jul 20253210 AMAQI
24th Jul 20253811 AMAQI
24th Jul 20254012 PMAQI
24th Jul 2025391 PMAQI
24th Jul 2025432 PMAQI
24th Jul 2025443 PMAQI
24th Jul 2025404 PMAQI
24th Jul 2025365 PMAQI
24th Jul 2025346 PMAQI
24th Jul 2025387 PMAQI
24th Jul 2025398 PMAQI
24th Jul 2025389 PMAQI
24th Jul 20254010 PMAQI
24th Jul 20254411 PMAQI
25th Jul 20254312 AMAQI
25th Jul 2025361 AMAQI
25th Jul 2025362 AMAQI
25th Jul 2025443 AMAQI
25th Jul 2025404 AMAQI
27°C17/36°C
25th Jul 2025365 AMAQI
25th Jul 2025346 AMAQI
25th Jul 2025337 AMAQI
25th Jul 2025338 AMAQI
25th Jul 2025339 AMAQI
25th Jul 20253210 AMAQI
25th Jul 20253111 AMAQI
25th Jul 20253112 PMAQI
25th Jul 2025341 PMAQI
25th Jul 2025412 PMAQI
25th Jul 2025423 PMAQI
25th Jul 2025434 PMAQI
25th Jul 2025375 PMAQI
25th Jul 2025376 PMAQI
25th Jul 2025367 PMAQI
25th Jul 2025368 PMAQI
25th Jul 2025449 PMAQI
25th Jul 20254510 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253612 AMAQI
26th Jul 2025371 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025463 AMAQI
26th Jul 2025484 AMAQI
26°C23/31°C
26th Jul 2025475 AMAQI
26th Jul 2025546 AMAQI
26th Jul 2025607 AMAQI
26th Jul 2025568 AMAQI
26th Jul 2025549 AMAQI
26th Jul 20255610 AMAQI
26th Jul 20255311 AMAQI
26th Jul 20255012 PMAQI
26th Jul 2025501 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025513 PMAQI
26th Jul 2025514 PMAQI
26th Jul 2025525 PMAQI
26th Jul 2025526 PMAQI
26th Jul 2025527 PMAQI
26th Jul 2025528 PMAQI
26th Jul 2025529 PMAQI
26th Jul 20255210 PMAQI
26th Jul 20255011 PMAQI
27th Jul 20255112 AMAQI
27th Jul 2025521 AMAQI
27th Jul 2025522 AMAQI
27th Jul 2025543 AMAQI
27th Jul 2025624 AMAQI
25°C16/33°C
27th Jul 2025585 AMAQI
27th Jul 2025606 AMAQI
27th Jul 2025597 AMAQI
27th Jul 2025588 AMAQI
27th Jul 2025589 AMAQI
27th Jul 20255810 AMAQI
27th Jul 20255911 AMAQI
27th Jul 20255812 PMAQI
27th Jul 2025581 PMAQI
27th Jul 2025572 PMAQI
27th Jul 2025563 PMAQI
27th Jul 2025564 PMAQI
27th Jul 2025595 PMAQI
27th Jul 2025606 PMAQI
27th Jul 2025607 PMAQI
27th Jul 2025588 PMAQI
27th Jul 2025569 PMAQI
27th Jul 20255710 PMAQI
27th Jul 20255611 PMAQI
28th Jul 20255612 AMAQI
28th Jul 2025551 AMAQI
28th Jul 2025562 AMAQI
28th Jul 2025553 AMAQI
28th Jul 2025564 AMAQI
24°C19/32°C
28th Jul 2025575 AMAQI
28th Jul 2025596 AMAQI
28th Jul 2025597 AMAQI
28th Jul 2025608 AMAQI
28th Jul 2025619 AMAQI
28th Jul 20256010 AMAQI
28th Jul 20256111 AMAQI
28th Jul 20256012 PMAQI
28th Jul 2025601 PMAQI
28th Jul 2025632 PMAQI
28th Jul 2025603 PMAQI
28th Jul 2025594 PMAQI
28th Jul 2025585 PMAQI
28th Jul 2025586 PMAQI
28th Jul 2025587 PMAQI
28th Jul 2025588 PMAQI
28th Jul 2025609 PMAQI
28th Jul 20256010 PMAQI
28th Jul 20256011 PMAQI
29th Jul 20255912 AMAQI
29th Jul 2025601 AMAQI
29th Jul 2025602 AMAQI
29th Jul 2025583 AMAQI
29th Jul 2025584 AMAQI
27°C21/34°C
29th Jul 2025585 AMAQI
29th Jul 2025566 AMAQI
29th Jul 2025567 AMAQI
29th Jul 2025568 AMAQI
29th Jul 2025549 AMAQI
29th Jul 20255010 AMAQI
29th Jul 20254411 AMAQI
29th Jul 20253812 PMAQI
29th Jul 2025371 PMAQI
29th Jul 2025372 PMAQI
29th Jul 2025383 PMAQI
29th Jul 2025424 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025526 PMAQI
29th Jul 2025547 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025569 PMAQI
29th Jul 20255710 PMAQI
29th Jul 20255711 PMAQI
30th Jul 20255812 AMAQI
30th Jul 2025591 AMAQI
30th Jul 2025592 AMAQI
30th Jul 2025603 AMAQI
30th Jul 2025594 AMAQI
25°C22/29°C
30th Jul 2025635 AMAQI
30th Jul 2025636 AMAQI
30th Jul 2025647 AMAQI
30th Jul 2025628 AMAQI
30th Jul 2025669 AMAQI
30th Jul 20256710 AMAQI
30th Jul 20256611 AMAQI
30th Jul 20256712 PMAQI
30th Jul 2025641 PMAQI
30th Jul 2025672 PMAQI
30th Jul 2025663 PMAQI
30th Jul 2025664 PMAQI
30th Jul 2025655 PMAQI
30th Jul 2025656 PMAQI
30th Jul 2025657 PMAQI
30th Jul 2025658 PMAQI
30th Jul 2025659 PMAQI
30th Jul 20256510 PMAQI
30th Jul 20256211 PMAQI
31st Jul 20256112 AMAQI
31st Jul 2025601 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025613 AMAQI
31st Jul 2025604 AMAQI
24°C20/30°C
31st Jul 2025685 AMAQI
31st Jul 2025666 AMAQI
31st Jul 2025587 AMAQI
31st Jul 2025538 AMAQI
31st Jul 2025509 AMAQI
31st Jul 20254610 AMAQI
31st Jul 20254311 AMAQI
31st Jul 20253512 PMAQI
31st Jul 2025331 PMAQI
31st Jul 2025312 PMAQI
31st Jul 2025323 PMAQI
31st Jul 2025344 PMAQI
31st Jul 2025325 PMAQI
31st Jul 2025326 PMAQI
31st Jul 2025317 PMAQI
31st Jul 2025328 PMAQI
31st Jul 2025469 PMAQI
31st Jul 20253710 PMAQI
31st Jul 20253211 PMAQI
1st Aug 20253212 AMAQI
1st Aug 2025331 AMAQI
1st Aug 2025312 AMAQI
1st Aug 2025323 AMAQI
1st Aug 2025304 AMAQI
20°C16/24°C
1st Aug 2025275 AMAQI
1st Aug 2025256 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025198 AMAQI
1st Aug 2025209 AMAQI
1st Aug 20252010 AMAQI
1st Aug 20251911 AMAQI
1st Aug 20251812 PMAQI
1st Aug 2025181 PMAQI
1st Aug 2025182 PMAQI
1st Aug 2025173 PMAQI
1st Aug 2025164 PMAQI
1st Aug 2025175 PMAQI
1st Aug 2025176 PMAQI
1st Aug 2025187 PMAQI
1st Aug 2025168 PMAQI
1st Aug 2025199 PMAQI
1st Aug 20252010 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252412 AMAQI
2nd Aug 2025271 AMAQI
2nd Aug 2025282 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025294 AMAQI
19°C12/26°C
2nd Aug 2025305 AMAQI
2nd Aug 2025296 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025248 AMAQI
2nd Aug 2025229 AMAQI
2nd Aug 20252210 AMAQI
2nd Aug 20252211 AMAQI
2nd Aug 20252112 PMAQI
2nd Aug 2025221 PMAQI
2nd Aug 2025262 PMAQI
2nd Aug 2025283 PMAQI
2nd Aug 2025384 PMAQI
2nd Aug 2025555 PMAQI
2nd Aug 2025616 PMAQI
2nd Aug 2025497 PMAQI
2nd Aug 2025328 PMAQI
2nd Aug 2025319 PMAQI
2nd Aug 20253210 PMAQI
2nd Aug 20253811 PMAQI
3rd Aug 20254312 AMAQI
3rd Aug 2025421 AMAQI
3rd Aug 2025452 AMAQI
3rd Aug 2025563 AMAQI
3rd Aug 2025494 AMAQI
21°C13/27°C
3rd Aug 2025455 AMAQI
3rd Aug 2025466 AMAQI
3rd Aug 2025457 AMAQI
3rd Aug 2025418 AMAQI
3rd Aug 2025399 AMAQI
3rd Aug 20254510 AMAQI
3rd Aug 20255811 AMAQI
3rd Aug 20256212 PMAQI
3rd Aug 2025721 PMAQI
3rd Aug 2025702 PMAQI
3rd Aug 2025663 PMAQI
3rd Aug 2025704 PMAQI
3rd Aug 2025705 PMAQI
3rd Aug 2025676 PMAQI
3rd Aug 2025607 PMAQI
3rd Aug 2025688 PMAQI
3rd Aug 2025569 PMAQI
3rd Aug 20256110 PMAQI
3rd Aug 20256211 PMAQI
4th Aug 20256112 AMAQI
4th Aug 2025621 AMAQI
4th Aug 2025602 AMAQI
4th Aug 2025583 AMAQI
4th Aug 2025544 AMAQI
24°C16/30°C
4th Aug 2025585 AMAQI
4th Aug 2025626 AMAQI
4th Aug 2025637 AMAQI
4th Aug 2025658 AMAQI
4th Aug 2025679 AMAQI
4th Aug 20257610 AMAQI
4th Aug 20257911 AMAQI
4th Aug 20258412 PMAQI
4th Aug 20251061 PMAQI
4th Aug 20251242 PMAQI
4th Aug 20251253 PMAQI
4th Aug 20251054 PMAQI
4th Aug 2025935 PMAQI
4th Aug 2025906 PMAQI
4th Aug 2025887 PMAQI
4th Aug 2025848 PMAQI
4th Aug 2025729 PMAQI
4th Aug 20257310 PMAQI
4th Aug 20257511 PMAQI
5th Aug 20256912 AMAQI
5th Aug 2025641 AMAQI
5th Aug 2025552 AMAQI
5th Aug 2025503 AMAQI
5th Aug 2025454 AMAQI
23°C17/28°C
5th Aug 2025445 AMAQI
5th Aug 2025416 AMAQI
5th Aug 2025347 AMAQI
5th Aug 2025328 AMAQI
5th Aug 2025289 AMAQI
5th Aug 20253010 AMAQI
5th Aug 20253111 AMAQI
5th Aug 20253312 PMAQI
5th Aug 2025311 PMAQI
5th Aug 2025322 PMAQI
5th Aug 2025303 PMAQI
5th Aug 2025304 PMAQI
5th Aug 2025295 PMAQI
5th Aug 2025286 PMAQI
5th Aug 2025277 PMAQI
5th Aug 2025268 PMAQI
5th Aug 2025349 PMAQI
5th Aug 20253010 PMAQI
5th Aug 20253011 PMAQI
6th Aug 20253012 AMAQI
6th Aug 2025321 AMAQI
6th Aug 2025292 AMAQI
6th Aug 2025313 AMAQI
6th Aug 2025294 AMAQI
21°C13/28°C
6th Aug 2025315 AMAQI
6th Aug 2025306 AMAQI
6th Aug 2025317 AMAQI
6th Aug 2025288 AMAQI
6th Aug 2025299 AMAQI
6th Aug 20253010 AMAQI
6th Aug 20253411 AMAQI
6th Aug 20253512 PMAQI
6th Aug 2025341 PMAQI
6th Aug 2025342 PMAQI
6th Aug 2025353 PMAQI
6th Aug 2025324 PMAQI
6th Aug 2025345 PMAQI
6th Aug 2025366 PMAQI
6th Aug 2025347 PMAQI
6th Aug 2025328 PMAQI
6th Aug 2025329 PMAQI
6th Aug 20253210 PMAQI
6th Aug 20253511 PMAQI
7th Aug 20253612 AMAQI
7th Aug 2025361 AMAQI
7th Aug 2025332 AMAQI
7th Aug 2025323 AMAQI
7th Aug 2025324 AMAQI
23°C14/31°C
7th Aug 2025325 AMAQI
7th Aug 2025326 AMAQI
7th Aug 2025337 AMAQI
7th Aug 2025328 AMAQI
7th Aug 2025369 AMAQI
7th Aug 20253810 AMAQI
7th Aug 20254311 AMAQI
7th Aug 20254612 PMAQI
7th Aug 2025441 PMAQI
7th Aug 2025502 PMAQI
7th Aug 2025493 PMAQI
7th Aug 2025474 PMAQI
7th Aug 2025485 PMAQI
7th Aug 2025516 PMAQI
7th Aug 2025517 PMAQI
7th Aug 2025478 PMAQI
7th Aug 2025439 PMAQI
7th Aug 20254110 PMAQI
7th Aug 20253911 PMAQI
8th Aug 20253912 AMAQI
8th Aug 2025391 AMAQI
8th Aug 2025402 AMAQI
8th Aug 2025393 AMAQI
8th Aug 2025464 AMAQI
24°C16/32°C
8th Aug 2025555 AMAQI
8th Aug 2025576 AMAQI
8th Aug 2025597 AMAQI
8th Aug 2025628 AMAQI
8th Aug 2025649 AMAQI
8th Aug 20256210 AMAQI
8th Aug 20255711 AMAQI
8th Aug 20255412 PMAQI
8th Aug 2025521 PMAQI
8th Aug 2025522 PMAQI
8th Aug 2025503 PMAQI
8th Aug 2025504 PMAQI
8th Aug 2025535 PMAQI
8th Aug 2025536 PMAQI
8th Aug 2025547 PMAQI
8th Aug 2025548 PMAQI
8th Aug 2025549 PMAQI
8th Aug 20255410 PMAQI
8th Aug 20255411 PMAQI
9th Aug 20255312 AMAQI
9th Aug 2025541 AMAQI
9th Aug 2025542 AMAQI
9th Aug 2025573 AMAQI
9th Aug 2025604 AMAQI
25°C19/34°C
9th Aug 2025585 AMAQI
9th Aug 2025616 AMAQI
9th Aug 2025587 AMAQI
9th Aug 2025628 AMAQI
9th Aug 2025639 AMAQI
9th Aug 20256410 AMAQI
9th Aug 20256111 AMAQI
9th Aug 20256412 PMAQI
9th Aug 2025641 PMAQI
9th Aug 2025642 PMAQI
9th Aug 2025633 PMAQI
9th Aug 2025644 PMAQI
9th Aug 2025615 PMAQI
9th Aug 2025596 PMAQI
9th Aug 2025607 PMAQI
9th Aug 2025618 PMAQI
9th Aug 2025589 PMAQI
9th Aug 20256010 PMAQI
9th Aug 20256211 PMAQI
10th Aug 20256212 AMAQI
10th Aug 2025621 AMAQI
10th Aug 2025622 AMAQI
10th Aug 2025623 AMAQI
10th Aug 2025654 AMAQI
27°C19/34°C
10th Aug 2025675 AMAQI
10th Aug 2025666 AMAQI
10th Aug 2025637 AMAQI
10th Aug 2025658 AMAQI
10th Aug 2025669 AMAQI
10th Aug 20256610 AMAQI
10th Aug 20256411 AMAQI
10th Aug 20256512 PMAQI
10th Aug 2025621 PMAQI
10th Aug 2025632 PMAQI
10th Aug 2025613 PMAQI
10th Aug 2025604 PMAQI
10th Aug 2025615 PMAQI
10th Aug 2025616 PMAQI
10th Aug 2025607 PMAQI
10th Aug 2025618 PMAQI
10th Aug 2025629 PMAQI
10th Aug 20256010 PMAQI
10th Aug 20255911 PMAQI
11th Aug 20255912 AMAQI
11th Aug 2025601 AMAQI
11th Aug 2025602 AMAQI
11th Aug 2025563 AMAQI
11th Aug 2025534 AMAQI
28°C22/35°C
11th Aug 2025525 AMAQI
11th Aug 2025526 AMAQI
11th Aug 2025527 AMAQI
11th Aug 2025548 AMAQI
11th Aug 2025589 AMAQI
11th Aug 20256110 AMAQI
11th Aug 20256011 AMAQI
11th Aug 20256112 PMAQI
11th Aug 2025581 PMAQI
11th Aug 2025572 PMAQI
11th Aug 2025563 PMAQI
11th Aug 2025554 PMAQI
11th Aug 2025545 PMAQI
11th Aug 2025546 PMAQI
11th Aug 2025547 PMAQI
11th Aug 2025548 PMAQI
11th Aug 2025589 PMAQI
11th Aug 20255610 PMAQI
11th Aug 20255611 PMAQI
12th Aug 20255612 AMAQI
12th Aug 2025561 AMAQI
12th Aug 2025572 AMAQI
12th Aug 2025573 AMAQI
12th Aug 2025574 AMAQI
29°C23/36°C
12th Aug 2025565 AMAQI
12th Aug 2025556 AMAQI
12th Aug 2025557 AMAQI
12th Aug 2025548 AMAQI
12th Aug 2025549 AMAQI
12th Aug 20255610 AMAQI
12th Aug 20255611 AMAQI
12th Aug 20255612 PMAQI
12th Aug 2025551 PMAQI
12th Aug 2025562 PMAQI
12th Aug 2025563 PMAQI
12th Aug 2025564 PMAQI
12th Aug 2025575 PMAQI
12th Aug 2025576 PMAQI
12th Aug 2025587 PMAQI
12th Aug 2025578 PMAQI
12th Aug 2025569 PMAQI
12th Aug 20255510 PMAQI
12th Aug 20255611 PMAQI
13th Aug 20255612 AMAQI
13th Aug 2025561 AMAQI
13th Aug 2025562 AMAQI
13th Aug 2025563 AMAQI
13th Aug 2025564 AMAQI
30°C21/37°C
13th Aug 2025565 AMAQI
5 AM13th Aug 2025576 AMAQI
13th Aug 2025577 AMAQI
13th Aug 2025578 AMAQI
13th Aug 2025599 AMAQI
13th Aug 20256010 AMAQI
13th Aug 20256011 AMAQI
13th Aug 20256012 PMAQI
12 PM13th Aug 2025601 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
45AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
45AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 45), while the lowest AQI was between 5 AM to 8 PM (Avg. 45).
Night time
Avg. Highest Time
12 AM - 11 PM
44AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
44AQI
8 hours / Day
240 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 12 AM to 11 PM (Avg. 44), while the lowest AQI was between 12 AM to 11 PM (Avg. 44).
2025 Days Vs Air Quality
Ontario, Montreal, Quebec, Canada
2025
87%
195
13%
29
Total number of days with different AQI categories in last 225 days in 2025 (140 days remaining)
Good
195 DaysModerate
29 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 87%
Health Risk Level:
Low
In 2025, 87% of 225 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, Montreal, Quebec, Canada
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
22AQI
22AQI
3rd January 2025
19AQI
19AQI
4th January 2025
20AQI
20AQI
5th January 2025
21AQI
21AQI
6th January 2025
25AQI
25AQI
7th January 2025
20AQI
20AQI
8th January 2025
20AQI
20AQI
9th January 2025
20AQI
20AQI
10th January 2025
23AQI
23AQI
11th January 2025
37AQI
37AQI
12th January 2025
31AQI
31AQI
13th January 2025
57AQI
57AQI
14th January 2025
39AQI
39AQI
15th January 2025
25AQI
25AQI
16th January 2025
24AQI
24AQI
17th January 2025
46AQI
46AQI
18th January 2025
43AQI
43AQI
19th January 2025
24AQI
24AQI
20th January 2025
25AQI
25AQI
21st January 2025
39AQI
39AQI
22nd January 2025
47AQI
47AQI
23rd January 2025
42AQI
42AQI
24th January 2025
45AQI
45AQI
25th January 2025
45AQI
45AQI
26th January 2025
35AQI
35AQI
27th January 2025
25AQI
25AQI
28th January 2025
24AQI
24AQI
29th January 2025
26AQI
26AQI
30th January 2025
23AQI
23AQI
31st January 2025
46AQI
46AQI
1st February 2025
23AQI
23AQI
2nd February 2025
37AQI
37AQI
3rd February 2025
55AQI
55AQI
4th February 2025
28AQI
28AQI
5th February 2025
25AQI
25AQI
6th February 2025
37AQI
37AQI
7th February 2025
37AQI
37AQI
8th February 2025
34AQI
34AQI
9th February 2025
33AQI
33AQI
10th February 2025
24AQI
24AQI
11th February 2025
29AQI
29AQI
12th February 2025
28AQI
28AQI
13th February 2025
25AQI
25AQI
14th February 2025
21AQI
21AQI
15th February 2025
24AQI
24AQI
16th February 2025
22AQI
22AQI
17th February 2025
21AQI
21AQI
18th February 2025
21AQI
21AQI
19th February 2025
20AQI
20AQI
20th February 2025
25AQI
25AQI
21st February 2025
24AQI
24AQI
22nd February 2025
28AQI
28AQI
23rd February 2025
53AQI
53AQI
24th February 2025
49AQI
49AQI
25th February 2025
56AQI
56AQI
26th February 2025
53AQI
53AQI
27th February 2025
60AQI
60AQI
28th February 2025
36AQI
36AQI
1st March 2025
25AQI
25AQI
2nd March 2025
23AQI
23AQI
3rd March 2025
37AQI
37AQI
4th March 2025
38AQI
38AQI
5th March 2025
53AQI
53AQI
6th March 2025
21AQI
21AQI
7th March 2025
23AQI
23AQI
8th March 2025
26AQI
26AQI
9th March 2025
25AQI
25AQI
10th March 2025
27AQI
27AQI
11th March 2025
45AQI
45AQI
12th March 2025
22AQI
22AQI
13th March 2025
43AQI
43AQI
14th March 2025
77AQI
77AQI
15th March 2025
65AQI
65AQI
16th March 2025
62AQI
62AQI
17th March 2025
27AQI
27AQI
18th March 2025
29AQI
29AQI
19th March 2025
36AQI
36AQI
20th March 2025
27AQI
27AQI
21st March 2025
22AQI
22AQI
22nd March 2025
24AQI
24AQI
23rd March 2025
19AQI
19AQI
24th March 2025
24AQI
24AQI
25th March 2025
25AQI
25AQI
26th March 2025
22AQI
22AQI
27th March 2025
20AQI
20AQI
28th March 2025
21AQI
21AQI
29th March 2025
20AQI
20AQI
30th March 2025
23AQI
23AQI
31st March 2025
31AQI
31AQI
1st April 2025
18AQI
18AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
20AQI
20AQI
4th April 2025
18AQI
18AQI
5th April 2025
20AQI
20AQI
6th April 2025
19AQI
19AQI
7th April 2025
19AQI
19AQI
8th April 2025
21AQI
21AQI
9th April 2025
18AQI
18AQI
10th April 2025
28AQI
28AQI
11th April 2025
32AQI
32AQI
12th April 2025
40AQI
40AQI
13th April 2025
26AQI
26AQI
14th April 2025
35AQI
35AQI
15th April 2025
29AQI
29AQI
16th April 2025
15AQI
15AQI
17th April 2025
17AQI
17AQI
18th April 2025
29AQI
29AQI
19th April 2025
47AQI
47AQI
20th April 2025
16AQI
16AQI
21st April 2025
19AQI
19AQI
22nd April 2025
21AQI
21AQI
23rd April 2025
15AQI
15AQI
24th April 2025
23AQI
23AQI
25th April 2025
22AQI
22AQI
26th April 2025
22AQI
22AQI
27th April 2025
13AQI
13AQI
28th April 2025
22AQI
22AQI
29th April 2025
30AQI
30AQI
30th April 2025
17AQI
17AQI
1st May 2025
19AQI
19AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
16AQI
16AQI
4th May 2025
29AQI
29AQI
5th May 2025
20AQI
20AQI
6th May 2025
20AQI
20AQI
7th May 2025
18AQI
18AQI
8th May 2025
16AQI
16AQI
9th May 2025
17AQI
17AQI
10th May 2025
22AQI
22AQI
11th May 2025
17AQI
17AQI
12th May 2025
23AQI
23AQI
13th May 2025
32AQI
32AQI
14th May 2025
39AQI
39AQI
15th May 2025
30AQI
30AQI
16th May 2025
42AQI
42AQI
17th May 2025
39AQI
39AQI
18th May 2025
20AQI
20AQI
19th May 2025
13AQI
13AQI
20th May 2025
13AQI
13AQI
21st May 2025
18AQI
18AQI
22nd May 2025
15AQI
15AQI
23rd May 2025
15AQI
15AQI
24th May 2025
14AQI
14AQI
25th May 2025
16AQI
16AQI
26th May 2025
26AQI
26AQI
27th May 2025
27AQI
27AQI
28th May 2025
32AQI
32AQI
29th May 2025
32AQI
32AQI
30th May 2025
26AQI
26AQI
31st May 2025
30AQI
30AQI
1st June 2025
13AQI
13AQI
2nd June 2025
18AQI
18AQI
3rd June 2025
26AQI
26AQI
4th June 2025
42AQI
42AQI
5th June 2025
46AQI
46AQI
6th June 2025
53AQI
53AQI
7th June 2025
59AQI
59AQI
8th June 2025
58AQI
58AQI
9th June 2025
59AQI
59AQI
10th June 2025
45AQI
45AQI
11th June 2025
52AQI
52AQI
12th June 2025
55AQI
55AQI
13th June 2025
28AQI
28AQI
14th June 2025
27AQI
27AQI
15th June 2025
31AQI
31AQI
16th June 2025
44AQI
44AQI
17th June 2025
41AQI
41AQI
18th June 2025
24AQI
24AQI
19th June 2025
40AQI
40AQI
20th June 2025
21AQI
21AQI
21st June 2025
26AQI
26AQI
22nd June 2025
27AQI
27AQI
23rd June 2025
41AQI
41AQI
24th June 2025
51AQI
51AQI
25th June 2025
45AQI
45AQI
26th June 2025
26AQI
26AQI
27th June 2025
28AQI
28AQI
28th June 2025
28AQI
28AQI
29th June 2025
28AQI
28AQI
30th June 2025
30AQI
30AQI
1st July 2025
33AQI
33AQI
2nd July 2025
31AQI
31AQI
3rd July 2025
39AQI
39AQI
4th July 2025
23AQI
23AQI
5th July 2025
27AQI
27AQI
6th July 2025
43AQI
43AQI
7th July 2025
40AQI
40AQI
8th July 2025
30AQI
30AQI
9th July 2025
35AQI
35AQI
10th July 2025
42AQI
42AQI
11th July 2025
45AQI
45AQI
12th July 2025
52AQI
52AQI
13th July 2025
41AQI
41AQI
14th July 2025
42AQI
42AQI
15th July 2025
41AQI
41AQI
16th July 2025
50AQI
50AQI
17th July 2025
47AQI
47AQI
18th July 2025
22AQI
22AQI
19th July 2025
35AQI
35AQI
20th July 2025
38AQI
38AQI
21st July 2025
30AQI
30AQI
22nd July 2025
19AQI
19AQI
23rd July 2025
24AQI
24AQI
24th July 2025
34AQI
34AQI
25th July 2025
38AQI
38AQI
26th July 2025
50AQI
50AQI
27th July 2025
57AQI
57AQI
28th July 2025
58AQI
58AQI
29th July 2025
53AQI
53AQI
30th July 2025
63AQI
63AQI
31st July 2025
46AQI
46AQI
1st August 2025
22AQI
22AQI
2nd August 2025
32AQI
32AQI
3rd August 2025
56AQI
56AQI
4th August 2025
77AQI
77AQI
5th August 2025
37AQI
37AQI
6th August 2025
32AQI
32AQI
7th August 2025
40AQI
40AQI
8th August 2025
52AQI
52AQI
9th August 2025
60AQI
60AQI
10th August 2025
63AQI
63AQI
11th August 2025
56AQI
56AQI
12th August 2025
56AQI
56AQI
31AQI
33AQI
32AQI
23AQI
23AQI
37AQI
40AQI
49AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202532AQI
30
1
23
5
27
4
30
31
23
7
26
5
5
7
195
29
Highest AQI recorded in
August49AQI
Lowest AQI recorded in
April23AQI
202430AQI
19
2
15
6
26
2
23
25
1
26
4
29
2
21
9
17
2
31
30
26
5
288
33
Highest AQI recorded in
February43AQI
Lowest AQI recorded in
November24AQI
202336AQI
15
4
13
3
17
15
22
3
1
15
2
2
2
14
7
1
15
4
17
7
25
22
16
7
206
37
4
2
Highest AQI recorded in
June55AQI
Lowest AQI recorded in
November25AQI
202232AQI
12
6
12
3
23
3
12
22
3
21
2
10
1
3
26
25
2
13
4
21
4
200
28
Highest AQI recorded in
January45AQI
Lowest AQI recorded in
September24AQI
202130AQI
24
5
17
7
23
2
24
2
19
6
16
2
18
3
16
3
22
18
3
20
3
19
2
236
38
Highest AQI recorded in
February37AQI
Lowest AQI recorded in
September23AQI
202024AQI
6
18
12
12
27
19
20
2
20
1
18
6
20
172
9
Highest AQI recorded in
November31AQI
Lowest AQI recorded in
December17AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
36AQILeast Polluted Year Recorded
2020(Avg.)
24AQIOntario's annual 2025 AQI (32) shows an average percentage change of 7.7% (worsened AQI) compared to previous years: 2020 (24), 2021 (30), 2022 (32), 2023 (36), 2024 (30).
