Montreal, 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
Montreal, Montreal, Quebec, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
17th Aug 2024
77AQILowest AQI recorded on
9th Aug 2024
13AQISame Day Analysis (4th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 70 of Moderate air quality on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 4th Aug - 5th Aug 2025
Montreal, Montreal, Quebec, Canada
AQI
Day
Night
.
5 AM4th Aug 2025
8 PM
4 AM5th Aug 2025
Day time
Avg. Highest Time
2PM4th Aug
129AQI
Avg. Lowest Time
5AM4th Aug
58AQI
Night time
Avg. Highest Time
10PM4th Aug
78AQI
Avg. Lowest Time
4AM5th Aug
46AQI
In the last 24 hours,
Montreal's AQI reached its highest point of 129 at 2 PM during the Day, while the lowest point, 46, was recorded at 4 AM during the Night between 4th Aug and 5th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Montreal, Montreal, Quebec, Canada
JulAug
06th - 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 - 02nd02nd - 03rd03rd - 04th04th - 05th05th
Day
Night
6th Jul 2025375 AMAQI
6th Jul 2025426 AMAQI
6th Jul 2025427 AMAQI
6th Jul 2025438 AMAQI
6th Jul 2025389 AMAQI
6th Jul 20254010 AMAQI
6th Jul 20253811 AMAQI
6th Jul 20253812 PMAQI
6th Jul 2025391 PMAQI
6th Jul 2025382 PMAQI
6th Jul 2025373 PMAQI
6th Jul 2025384 PMAQI
6th Jul 2025365 PMAQI
6th Jul 2025366 PMAQI
6th Jul 2025377 PMAQI
6th Jul 2025388 PMAQI
6th Jul 2025369 PMAQI
6th Jul 20253810 PMAQI
6th Jul 20253911 PMAQI
7th Jul 20253912 AMAQI
7th Jul 2025401 AMAQI
7th Jul 2025392 AMAQI
7th Jul 2025443 AMAQI
7th Jul 2025444 AMAQI
28°C20/37°C
7th Jul 2025465 AMAQI
7th Jul 2025446 AMAQI
7th Jul 2025347 AMAQI
7th Jul 2025378 AMAQI
7th Jul 2025469 AMAQI
7th Jul 20254710 AMAQI
7th Jul 20254711 AMAQI
7th Jul 20254712 PMAQI
7th Jul 2025491 PMAQI
7th Jul 2025482 PMAQI
7th Jul 2025463 PMAQI
7th Jul 2025464 PMAQI
7th Jul 2025425 PMAQI
7th Jul 2025386 PMAQI
7th Jul 2025387 PMAQI
7th Jul 2025388 PMAQI
7th Jul 2025409 PMAQI
7th Jul 20253810 PMAQI
7th Jul 20253411 PMAQI
8th Jul 20253712 AMAQI
8th Jul 2025401 AMAQI
8th Jul 2025392 AMAQI
8th Jul 2025303 AMAQI
8th Jul 2025284 AMAQI
18°C15/24°C
8th Jul 2025275 AMAQI
8th Jul 2025266 AMAQI
8th Jul 2025277 AMAQI
8th Jul 2025298 AMAQI
8th Jul 2025309 AMAQI
8th Jul 20253010 AMAQI
8th Jul 20253111 AMAQI
8th Jul 20253012 PMAQI
8th Jul 2025321 PMAQI
8th Jul 2025342 PMAQI
8th Jul 2025353 PMAQI
8th Jul 2025354 PMAQI
8th Jul 2025335 PMAQI
8th Jul 2025326 PMAQI
8th Jul 2025327 PMAQI
8th Jul 2025318 PMAQI
8th Jul 2025309 PMAQI
8th Jul 20252910 PMAQI
8th Jul 20253011 PMAQI
9th Jul 20253112 AMAQI
9th Jul 2025311 AMAQI
9th Jul 2025322 AMAQI
9th Jul 2025383 AMAQI
9th Jul 2025414 AMAQI
22°C16/30°C
9th Jul 2025435 AMAQI
9th Jul 2025436 AMAQI
9th Jul 2025467 AMAQI
9th Jul 2025478 AMAQI
9th Jul 2025419 AMAQI
9th Jul 20254210 AMAQI
9th Jul 20254211 AMAQI
9th Jul 20254212 PMAQI
9th Jul 2025431 PMAQI
9th Jul 2025402 PMAQI
9th Jul 2025433 PMAQI
9th Jul 2025414 PMAQI
9th Jul 2025435 PMAQI
9th Jul 2025406 PMAQI
9th Jul 2025407 PMAQI
9th Jul 2025428 PMAQI
9th Jul 2025419 PMAQI
9th Jul 20254110 PMAQI
9th Jul 20254011 PMAQI
10th Jul 20253712 AMAQI
10th Jul 2025391 AMAQI
10th Jul 2025402 AMAQI
10th Jul 2025443 AMAQI
10th Jul 2025484 AMAQI
24°C17/31°C
10th Jul 2025465 AMAQI
10th Jul 2025486 AMAQI
10th Jul 2025477 AMAQI
10th Jul 2025468 AMAQI
10th Jul 2025449 AMAQI
10th Jul 20254410 AMAQI
10th Jul 20254311 AMAQI
10th Jul 20254612 PMAQI
10th Jul 2025441 PMAQI
10th Jul 2025442 PMAQI
10th Jul 2025423 PMAQI
10th Jul 2025434 PMAQI
10th Jul 2025455 PMAQI
10th Jul 2025456 PMAQI
10th Jul 2025467 PMAQI
10th Jul 2025478 PMAQI
10th Jul 2025449 PMAQI
10th Jul 20254310 PMAQI
10th Jul 20254311 PMAQI
11th Jul 20254012 AMAQI
11th Jul 2025421 AMAQI
11th Jul 2025432 AMAQI
11th Jul 2025503 AMAQI
11th Jul 2025514 AMAQI
25°C19/30°C
11th Jul 2025505 AMAQI
11th Jul 2025506 AMAQI
11th Jul 2025487 AMAQI
11th Jul 2025508 AMAQI
11th Jul 2025499 AMAQI
11th Jul 20254810 AMAQI
11th Jul 20255111 AMAQI
11th Jul 20255112 PMAQI
11th Jul 2025511 PMAQI
11th Jul 2025502 PMAQI
11th Jul 2025493 PMAQI
11th Jul 2025514 PMAQI
11th Jul 2025495 PMAQI
11th Jul 2025506 PMAQI
11th Jul 2025487 PMAQI
11th Jul 2025498 PMAQI
11th Jul 2025469 PMAQI
11th Jul 20254610 PMAQI
11th Jul 20254711 PMAQI
12th Jul 20254812 AMAQI
12th Jul 2025481 AMAQI
12th Jul 2025482 AMAQI
12th Jul 2025523 AMAQI
12th Jul 2025544 AMAQI
26°C19/33°C
12th Jul 2025525 AMAQI
12th Jul 2025526 AMAQI
12th Jul 2025527 AMAQI
12th Jul 2025538 AMAQI
12th Jul 2025529 AMAQI
12th Jul 20255210 AMAQI
12th Jul 20255211 AMAQI
12th Jul 20255212 PMAQI
12th Jul 2025521 PMAQI
12th Jul 2025522 PMAQI
12th Jul 2025523 PMAQI
12th Jul 2025524 PMAQI
12th Jul 2025525 PMAQI
12th Jul 2025536 PMAQI
12th Jul 2025537 PMAQI
12th Jul 2025528 PMAQI
12th Jul 2025529 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255112 AMAQI
13th Jul 2025521 AMAQI
13th Jul 2025522 AMAQI
13th Jul 2025453 AMAQI
13th Jul 2025434 AMAQI
27°C20/34°C
13th Jul 2025415 AMAQI
13th Jul 2025426 AMAQI
13th Jul 2025427 AMAQI
13th Jul 2025418 AMAQI
13th Jul 2025439 AMAQI
13th Jul 20254210 AMAQI
13th Jul 20254311 AMAQI
13th Jul 20254212 PMAQI
13th Jul 2025421 PMAQI
13th Jul 2025422 PMAQI
13th Jul 2025413 PMAQI
13th Jul 2025454 PMAQI
13th Jul 2025445 PMAQI
13th Jul 2025446 PMAQI
13th Jul 2025437 PMAQI
13th Jul 2025448 PMAQI
13th Jul 2025449 PMAQI
13th Jul 20254310 PMAQI
13th Jul 20254111 PMAQI
14th Jul 20254312 AMAQI
14th Jul 2025431 AMAQI
14th Jul 2025422 AMAQI
14th Jul 2025423 AMAQI
14th Jul 2025394 AMAQI
26°C23/30°C
14th Jul 2025365 AMAQI
14th Jul 2025356 AMAQI
14th Jul 2025357 AMAQI
14th Jul 2025338 AMAQI
14th Jul 2025379 AMAQI
14th Jul 20253810 AMAQI
14th Jul 20253911 AMAQI
14th Jul 20254512 PMAQI
14th Jul 2025481 PMAQI
14th Jul 2025472 PMAQI
14th Jul 2025423 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025425 PMAQI
14th Jul 2025446 PMAQI
14th Jul 2025427 PMAQI
14th Jul 2025438 PMAQI
14th Jul 2025419 PMAQI
14th Jul 20254210 PMAQI
14th Jul 20254011 PMAQI
15th Jul 20254012 AMAQI
15th Jul 2025411 AMAQI
15th Jul 2025402 AMAQI
15th Jul 2025333 AMAQI
15th Jul 2025274 AMAQI
27°C22/32°C
15th Jul 2025375 AMAQI
15th Jul 2025356 AMAQI
15th Jul 2025397 AMAQI
15th Jul 2025388 AMAQI
15th Jul 2025429 AMAQI
15th Jul 20254310 AMAQI
15th Jul 20254111 AMAQI
15th Jul 20254112 PMAQI
15th Jul 2025421 PMAQI
15th Jul 2025422 PMAQI
15th Jul 2025423 PMAQI
15th Jul 2025444 PMAQI
15th Jul 2025415 PMAQI
15th Jul 2025416 PMAQI
15th Jul 2025417 PMAQI
15th Jul 2025418 PMAQI
15th Jul 2025409 PMAQI
15th Jul 20254010 PMAQI
15th Jul 20253911 PMAQI
16th Jul 20254012 AMAQI
16th Jul 2025391 AMAQI
16th Jul 2025402 AMAQI
16th Jul 2025403 AMAQI
16th Jul 2025504 AMAQI
27°C20/33°C
16th Jul 2025505 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025527 AMAQI
16th Jul 2025558 AMAQI
16th Jul 2025509 AMAQI
16th Jul 20255010 AMAQI
16th Jul 20254911 AMAQI
16th Jul 20254912 PMAQI
16th Jul 2025481 PMAQI
16th Jul 2025492 PMAQI
16th Jul 2025503 PMAQI
16th Jul 2025474 PMAQI
16th Jul 2025485 PMAQI
16th Jul 2025486 PMAQI
16th Jul 2025487 PMAQI
16th Jul 2025488 PMAQI
16th Jul 2025479 PMAQI
16th Jul 20254710 PMAQI
16th Jul 20254811 PMAQI
17th Jul 20254812 AMAQI
17th Jul 2025481 AMAQI
17th Jul 2025492 AMAQI
17th Jul 2025513 AMAQI
17th Jul 2025594 AMAQI
29°C22/36°C
17th Jul 2025535 AMAQI
17th Jul 2025486 AMAQI
17th Jul 2025447 AMAQI
17th Jul 2025438 AMAQI
17th Jul 2025489 AMAQI
17th Jul 20254810 AMAQI
17th Jul 20254811 AMAQI
17th Jul 20254612 PMAQI
17th Jul 2025481 PMAQI
17th Jul 2025472 PMAQI
17th Jul 2025463 PMAQI
17th Jul 2025474 PMAQI
17th Jul 2025485 PMAQI
17th Jul 2025486 PMAQI
17th Jul 2025477 PMAQI
17th Jul 2025458 PMAQI
17th Jul 2025489 PMAQI
17th Jul 20254810 PMAQI
17th Jul 20254411 PMAQI
18th Jul 20254212 AMAQI
18th Jul 2025421 AMAQI
18th Jul 2025402 AMAQI
18th Jul 2025303 AMAQI
18th Jul 2025194 AMAQI
27°C18/31°C
18th Jul 2025195 AMAQI
18th Jul 2025226 AMAQI
18th Jul 2025217 AMAQI
18th Jul 2025228 AMAQI
18th Jul 2025249 AMAQI
18th Jul 20252610 AMAQI
18th Jul 20252611 AMAQI
18th Jul 20252612 PMAQI
18th Jul 2025261 PMAQI
18th Jul 2025252 PMAQI
18th Jul 2025263 PMAQI
18th Jul 2025274 PMAQI
18th Jul 2025265 PMAQI
18th Jul 2025286 PMAQI
18th Jul 2025287 PMAQI
18th Jul 2025288 PMAQI
18th Jul 2025279 PMAQI
18th Jul 20252610 PMAQI
18th Jul 20252811 PMAQI
19th Jul 20252812 AMAQI
19th Jul 2025281 AMAQI
19th Jul 2025292 AMAQI
19th Jul 2025293 AMAQI
19th Jul 2025294 AMAQI
21°C14/28°C
19th Jul 2025285 AMAQI
19th Jul 2025286 AMAQI
19th Jul 2025277 AMAQI
19th Jul 2025288 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20252810 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252712 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025302 PMAQI
19th Jul 2025323 PMAQI
19th Jul 2025314 PMAQI
19th Jul 2025335 PMAQI
19th Jul 2025336 PMAQI
19th Jul 2025367 PMAQI
19th Jul 2025358 PMAQI
19th Jul 2025319 PMAQI
19th Jul 20253010 PMAQI
19th Jul 20253211 PMAQI
20th Jul 20253412 AMAQI
20th Jul 2025321 AMAQI
20th Jul 2025322 AMAQI
20th Jul 2025403 AMAQI
20th Jul 2025484 AMAQI
22°C15/29°C
20th Jul 2025425 AMAQI
20th Jul 2025426 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025388 AMAQI
20th Jul 2025369 AMAQI
20th Jul 20253410 AMAQI
20th Jul 20253411 AMAQI
20th Jul 20253412 PMAQI
20th Jul 2025341 PMAQI
20th Jul 2025332 PMAQI
20th Jul 2025333 PMAQI
20th Jul 2025344 PMAQI
20th Jul 2025365 PMAQI
20th Jul 2025366 PMAQI
20th Jul 2025367 PMAQI
20th Jul 2025368 PMAQI
20th Jul 2025369 PMAQI
20th Jul 20253710 PMAQI
20th Jul 20254111 PMAQI
21st Jul 20254012 AMAQI
21st Jul 2025361 AMAQI
21st Jul 2025372 AMAQI
21st Jul 2025413 AMAQI
21st Jul 2025544 AMAQI
22°C17/29°C
21st Jul 2025445 AMAQI
21st Jul 2025366 AMAQI
21st Jul 2025347 AMAQI
21st Jul 2025338 AMAQI
21st Jul 2025349 AMAQI
21st Jul 20253510 AMAQI
21st Jul 20253411 AMAQI
21st Jul 20253512 PMAQI
21st Jul 2025341 PMAQI
21st Jul 2025352 PMAQI
21st Jul 2025363 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025345 PMAQI
21st Jul 2025346 PMAQI
21st Jul 2025357 PMAQI
21st Jul 2025338 PMAQI
21st Jul 2025349 PMAQI
21st Jul 20253210 PMAQI
21st Jul 20253211 PMAQI
22nd Jul 20253112 AMAQI
22nd Jul 2025311 AMAQI
22nd Jul 2025322 AMAQI
22nd Jul 2025233 AMAQI
22nd Jul 2025204 AMAQI
19°C15/24°C
22nd Jul 2025225 AMAQI
22nd Jul 2025206 AMAQI
22nd Jul 2025207 AMAQI
22nd Jul 2025208 AMAQI
22nd Jul 2025229 AMAQI
22nd Jul 20252210 AMAQI
22nd Jul 20252211 AMAQI
22nd Jul 20252212 PMAQI
22nd Jul 2025221 PMAQI
22nd Jul 2025222 PMAQI
22nd Jul 2025223 PMAQI
22nd Jul 2025234 PMAQI
22nd Jul 2025225 PMAQI
22nd Jul 2025226 PMAQI
22nd Jul 2025237 PMAQI
22nd Jul 2025228 PMAQI
22nd Jul 2025229 PMAQI
22nd Jul 20252210 PMAQI
22nd Jul 20252211 PMAQI
23rd Jul 20252212 AMAQI
23rd Jul 2025221 AMAQI
23rd Jul 2025232 AMAQI
23rd Jul 2025243 AMAQI
23rd Jul 2025234 AMAQI
19°C12/25°C
23rd Jul 2025245 AMAQI
23rd Jul 2025246 AMAQI
23rd Jul 2025237 AMAQI
23rd Jul 2025248 AMAQI
23rd Jul 2025239 AMAQI
23rd Jul 20252410 AMAQI
23rd Jul 20252611 AMAQI
23rd Jul 20252512 PMAQI
23rd Jul 2025241 PMAQI
23rd Jul 2025242 PMAQI
23rd Jul 2025243 PMAQI
23rd Jul 2025234 PMAQI
23rd Jul 2025235 PMAQI
23rd Jul 2025236 PMAQI
23rd Jul 2025237 PMAQI
23rd Jul 2025238 PMAQI
23rd Jul 2025239 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252511 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025262 AMAQI
24th Jul 2025273 AMAQI
24th Jul 2025294 AMAQI
22°C13/30°C
24th Jul 2025275 AMAQI
24th Jul 2025266 AMAQI
24th Jul 2025267 AMAQI
24th Jul 2025268 AMAQI
24th Jul 2025289 AMAQI
24th Jul 20252810 AMAQI
24th Jul 20252911 AMAQI
24th Jul 20253212 PMAQI
24th Jul 2025361 PMAQI
24th Jul 2025352 PMAQI
24th Jul 2025363 PMAQI
24th Jul 2025334 PMAQI
24th Jul 2025325 PMAQI
24th Jul 2025326 PMAQI
24th Jul 2025357 PMAQI
24th Jul 2025368 PMAQI
24th Jul 2025339 PMAQI
24th Jul 20253410 PMAQI
24th Jul 20253411 PMAQI
25th Jul 20253112 AMAQI
25th Jul 2025311 AMAQI
25th Jul 2025322 AMAQI
25th Jul 2025413 AMAQI
25th Jul 2025444 AMAQI
27°C17/36°C
25th Jul 2025355 AMAQI
25th Jul 2025326 AMAQI
25th Jul 2025317 AMAQI
25th Jul 2025328 AMAQI
25th Jul 2025339 AMAQI
25th Jul 20253310 AMAQI
25th Jul 20253311 AMAQI
25th Jul 20253212 PMAQI
25th Jul 2025331 PMAQI
25th Jul 2025352 PMAQI
25th Jul 2025393 PMAQI
25th Jul 2025404 PMAQI
25th Jul 2025385 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025367 PMAQI
25th Jul 2025378 PMAQI
25th Jul 2025399 PMAQI
25th Jul 20253810 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253612 AMAQI
26th Jul 2025361 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025473 AMAQI
26th Jul 2025464 AMAQI
26°C23/31°C
26th Jul 2025465 AMAQI
26th Jul 2025526 AMAQI
26th Jul 2025577 AMAQI
26th Jul 2025548 AMAQI
26th Jul 2025509 AMAQI
26th Jul 20255110 AMAQI
26th Jul 20255211 AMAQI
26th Jul 20255212 PMAQI
26th Jul 2025511 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025503 PMAQI
26th Jul 2025494 PMAQI
26th Jul 2025505 PMAQI
26th Jul 2025506 PMAQI
26th Jul 2025507 PMAQI
26th Jul 2025508 PMAQI
26th Jul 2025509 PMAQI
26th Jul 20255010 PMAQI
26th Jul 20254911 PMAQI
27th Jul 20255012 AMAQI
27th Jul 2025501 AMAQI
27th Jul 2025522 AMAQI
27th Jul 2025483 AMAQI
27th Jul 2025604 AMAQI
25°C16/33°C
27th Jul 2025585 AMAQI
27th Jul 2025586 AMAQI
27th Jul 2025587 AMAQI
27th Jul 2025568 AMAQI
27th Jul 2025569 AMAQI
27th Jul 20255610 AMAQI
27th Jul 20255711 AMAQI
27th Jul 20255612 PMAQI
27th Jul 2025561 PMAQI
27th Jul 2025562 PMAQI
27th Jul 2025563 PMAQI
27th Jul 2025564 PMAQI
27th Jul 2025575 PMAQI
27th Jul 2025566 PMAQI
27th Jul 2025577 PMAQI
27th Jul 2025568 PMAQI
27th Jul 2025559 PMAQI
27th Jul 20255610 PMAQI
27th Jul 20255411 PMAQI
28th Jul 20255412 AMAQI
28th Jul 2025551 AMAQI
28th Jul 2025562 AMAQI
28th Jul 2025523 AMAQI
28th Jul 2025524 AMAQI
24°C19/32°C
28th Jul 2025545 AMAQI
28th Jul 2025576 AMAQI
28th Jul 2025577 AMAQI
28th Jul 2025578 AMAQI
28th Jul 2025569 AMAQI
28th Jul 20255610 AMAQI
28th Jul 20255711 AMAQI
28th Jul 20255612 PMAQI
28th Jul 2025581 PMAQI
28th Jul 2025582 PMAQI
28th Jul 2025573 PMAQI
28th Jul 2025564 PMAQI
28th Jul 2025565 PMAQI
28th Jul 2025566 PMAQI
28th Jul 2025567 PMAQI
28th Jul 2025568 PMAQI
28th Jul 2025579 PMAQI
28th Jul 20255710 PMAQI
28th Jul 20255611 PMAQI
29th Jul 20255612 AMAQI
29th Jul 2025561 AMAQI
29th Jul 2025562 AMAQI
29th Jul 2025573 AMAQI
29th Jul 2025584 AMAQI
27°C21/34°C
29th Jul 2025575 AMAQI
29th Jul 2025566 AMAQI
29th Jul 2025567 AMAQI
29th Jul 2025568 AMAQI
29th Jul 2025569 AMAQI
29th Jul 20255510 AMAQI
29th Jul 20255411 AMAQI
29th Jul 20255312 PMAQI
29th Jul 2025521 PMAQI
29th Jul 2025522 PMAQI
29th Jul 2025523 PMAQI
29th Jul 2025544 PMAQI
29th Jul 2025545 PMAQI
29th Jul 2025556 PMAQI
29th Jul 2025557 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025569 PMAQI
29th Jul 20255710 PMAQI
29th Jul 20255711 PMAQI
30th Jul 20255612 AMAQI
30th Jul 2025561 AMAQI
30th Jul 2025562 AMAQI
30th Jul 2025563 AMAQI
30th Jul 2025604 AMAQI
25°C22/29°C
30th Jul 2025635 AMAQI
30th Jul 2025626 AMAQI
30th Jul 2025637 AMAQI
30th Jul 2025638 AMAQI
30th Jul 2025629 AMAQI
30th Jul 20256110 AMAQI
30th Jul 20256211 AMAQI
30th Jul 20256212 PMAQI
30th Jul 2025621 PMAQI
30th Jul 2025622 PMAQI
30th Jul 2025623 PMAQI
30th Jul 2025614 PMAQI
30th Jul 2025615 PMAQI
30th Jul 2025616 PMAQI
30th Jul 2025617 PMAQI
30th Jul 2025618 PMAQI
30th Jul 2025619 PMAQI
30th Jul 20256110 PMAQI
30th Jul 20255911 PMAQI
31st Jul 20256012 AMAQI
31st Jul 2025601 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025603 AMAQI
31st Jul 2025604 AMAQI
24°C20/30°C
31st Jul 2025665 AMAQI
31st Jul 2025636 AMAQI
31st Jul 2025567 AMAQI
31st Jul 2025518 AMAQI
31st Jul 2025509 AMAQI
31st Jul 20254310 AMAQI
31st Jul 20254011 AMAQI
31st Jul 20253212 PMAQI
31st Jul 2025381 PMAQI
31st Jul 2025352 PMAQI
31st Jul 2025393 PMAQI
31st Jul 2025364 PMAQI
31st Jul 2025335 PMAQI
31st Jul 2025346 PMAQI
31st Jul 2025377 PMAQI
31st Jul 2025348 PMAQI
31st Jul 2025459 PMAQI
31st Jul 20254210 PMAQI
31st Jul 20254511 PMAQI
1st Aug 20253812 AMAQI
1st Aug 2025351 AMAQI
1st Aug 2025322 AMAQI
1st Aug 2025343 AMAQI
1st Aug 2025344 AMAQI
20°C16/24°C
1st Aug 2025295 AMAQI
1st Aug 2025266 AMAQI
1st Aug 2025267 AMAQI
1st Aug 2025218 AMAQI
1st Aug 2025209 AMAQI
1st Aug 20252010 AMAQI
1st Aug 20251911 AMAQI
1st Aug 20251812 PMAQI
1st Aug 2025161 PMAQI
1st Aug 2025182 PMAQI
1st Aug 2025203 PMAQI
1st Aug 2025164 PMAQI
1st Aug 2025185 PMAQI
1st Aug 2025186 PMAQI
1st Aug 2025167 PMAQI
1st Aug 2025178 PMAQI
1st Aug 2025199 PMAQI
1st Aug 20252110 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252312 AMAQI
2nd Aug 2025261 AMAQI
2nd Aug 2025282 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025284 AMAQI
19°C12/26°C
2nd Aug 2025285 AMAQI
2nd Aug 2025266 AMAQI
2nd Aug 2025257 AMAQI
2nd Aug 2025238 AMAQI
2nd Aug 2025229 AMAQI
2nd Aug 20252110 AMAQI
2nd Aug 20252111 AMAQI
2nd Aug 20252212 PMAQI
2nd Aug 2025221 PMAQI
2nd Aug 2025272 PMAQI
2nd Aug 2025303 PMAQI
2nd Aug 2025394 PMAQI
2nd Aug 2025555 PMAQI
2nd Aug 2025606 PMAQI
2nd Aug 2025507 PMAQI
2nd Aug 2025318 PMAQI
2nd Aug 2025309 PMAQI
2nd Aug 20253210 PMAQI
2nd Aug 20253911 PMAQI
3rd Aug 20254312 AMAQI
3rd Aug 2025401 AMAQI
3rd Aug 2025442 AMAQI
3rd Aug 2025523 AMAQI
3rd Aug 2025464 AMAQI
21°C13/27°C
3rd Aug 2025445 AMAQI
3rd Aug 2025456 AMAQI
3rd Aug 2025447 AMAQI
3rd Aug 2025408 AMAQI
3rd Aug 2025369 AMAQI
3rd Aug 20254510 AMAQI
3rd Aug 20255711 AMAQI
3rd Aug 20256212 PMAQI
3rd Aug 2025701 PMAQI
3rd Aug 2025682 PMAQI
3rd Aug 2025663 PMAQI
3rd Aug 2025664 PMAQI
3rd Aug 2025695 PMAQI
3rd Aug 2025666 PMAQI
3rd Aug 2025597 PMAQI
3rd Aug 2025668 PMAQI
3rd Aug 2025559 PMAQI
3rd Aug 20256310 PMAQI
3rd Aug 20256211 PMAQI
4th Aug 20256012 AMAQI
4th Aug 2025601 AMAQI
4th Aug 2025602 AMAQI
4th Aug 2025563 AMAQI
4th Aug 2025534 AMAQI
24°C16/30°C
4th Aug 2025585 AMAQI
4th Aug 2025626 AMAQI
4th Aug 2025647 AMAQI
4th Aug 2025668 AMAQI
4th Aug 2025689 AMAQI
4th Aug 20257710 AMAQI
4th Aug 20258011 AMAQI
4th Aug 20258312 PMAQI
4th Aug 20251071 PMAQI
4th Aug 20251292 PMAQI
4th Aug 20251243 PMAQI
4th Aug 20251094 PMAQI
4th Aug 2025995 PMAQI
4th Aug 2025956 PMAQI
4th Aug 2025967 PMAQI
4th Aug 2025868 PMAQI
4th Aug 2025729 PMAQI
4th Aug 20257810 PMAQI
4th Aug 20257811 PMAQI
5th Aug 20257612 AMAQI
5th Aug 2025681 AMAQI
5th Aug 2025582 AMAQI
5th Aug 2025523 AMAQI
5th Aug 2025464 AMAQI
23°C17/28°C
5th Aug 2025445 AMAQI
5 AM5th Aug 2025396 AMAQI
5th Aug 2025357 AMAQI
5th Aug 2025348 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
43AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
43AQI
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. 43), while the lowest AQI was between 5 AM to 8 PM (Avg. 43).
Night time
Avg. Highest Time
12 AM - 11 PM
42AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
42AQI
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. 42), while the lowest AQI was between 12 AM to 11 PM (Avg. 42).
2025 Days Vs Air Quality
Montreal, Montreal, Quebec, Canada
2025
91%
196
9%
20
Total number of days with different AQI categories in last 217 days in 2025 (148 days remaining)
Good
196 DaysModerate
20 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 91%
Health Risk Level:
Very Low
In 2025, 91% of 217 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
Montreal, 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
27AQI
27AQI
3rd January 2025
23AQI
23AQI
4th January 2025
21AQI
21AQI
5th January 2025
25AQI
25AQI
6th January 2025
27AQI
27AQI
7th January 2025
23AQI
23AQI
8th January 2025
23AQI
23AQI
9th January 2025
22AQI
22AQI
10th January 2025
22AQI
22AQI
11th January 2025
38AQI
38AQI
12th January 2025
30AQI
30AQI
13th January 2025
58AQI
58AQI
14th January 2025
31AQI
31AQI
15th January 2025
22AQI
22AQI
16th January 2025
30AQI
30AQI
17th January 2025
63AQI
63AQI
18th January 2025
45AQI
45AQI
19th January 2025
27AQI
27AQI
20th January 2025
24AQI
24AQI
21st January 2025
35AQI
35AQI
22nd January 2025
45AQI
45AQI
23rd January 2025
40AQI
40AQI
24th January 2025
43AQI
43AQI
25th January 2025
45AQI
45AQI
26th January 2025
36AQI
36AQI
27th January 2025
23AQI
23AQI
28th January 2025
25AQI
25AQI
29th January 2025
28AQI
28AQI
30th January 2025
25AQI
25AQI
31st January 2025
46AQI
46AQI
1st February 2025
23AQI
23AQI
2nd February 2025
35AQI
35AQI
3rd February 2025
54AQI
54AQI
4th February 2025
27AQI
27AQI
5th February 2025
22AQI
22AQI
6th February 2025
33AQI
33AQI
7th February 2025
31AQI
31AQI
8th February 2025
24AQI
24AQI
9th February 2025
34AQI
34AQI
10th February 2025
26AQI
26AQI
11th February 2025
28AQI
28AQI
12th February 2025
31AQI
31AQI
13th February 2025
27AQI
27AQI
14th February 2025
21AQI
21AQI
15th February 2025
22AQI
22AQI
16th February 2025
23AQI
23AQI
17th February 2025
21AQI
21AQI
18th February 2025
21AQI
21AQI
19th February 2025
22AQI
22AQI
20th February 2025
30AQI
30AQI
21st February 2025
21AQI
21AQI
22nd February 2025
27AQI
27AQI
23rd February 2025
52AQI
52AQI
24th February 2025
48AQI
48AQI
25th February 2025
58AQI
58AQI
26th February 2025
50AQI
50AQI
27th February 2025
40AQI
40AQI
28th February 2025
30AQI
30AQI
1st March 2025
26AQI
26AQI
2nd March 2025
23AQI
23AQI
3rd March 2025
34AQI
34AQI
4th March 2025
37AQI
37AQI
5th March 2025
57AQI
57AQI
6th March 2025
20AQI
20AQI
7th March 2025
22AQI
22AQI
8th March 2025
27AQI
27AQI
9th March 2025
24AQI
24AQI
10th March 2025
31AQI
31AQI
11th March 2025
45AQI
45AQI
12th March 2025
24AQI
24AQI
13th March 2025
44AQI
44AQI
14th March 2025
87AQI
87AQI
15th March 2025
59AQI
59AQI
16th March 2025
46AQI
46AQI
17th March 2025
23AQI
23AQI
18th March 2025
30AQI
30AQI
19th March 2025
37AQI
37AQI
20th March 2025
27AQI
27AQI
21st March 2025
22AQI
22AQI
22nd March 2025
25AQI
25AQI
23rd March 2025
20AQI
20AQI
24th March 2025
26AQI
26AQI
25th March 2025
25AQI
25AQI
26th March 2025
22AQI
22AQI
27th March 2025
20AQI
20AQI
28th March 2025
22AQI
22AQI
29th March 2025
20AQI
20AQI
30th March 2025
24AQI
24AQI
31st March 2025
31AQI
31AQI
1st April 2025
18AQI
18AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
21AQI
21AQI
4th April 2025
19AQI
19AQI
5th April 2025
20AQI
20AQI
6th April 2025
18AQI
18AQI
7th April 2025
20AQI
20AQI
8th April 2025
22AQI
22AQI
9th April 2025
18AQI
18AQI
10th April 2025
26AQI
26AQI
11th April 2025
32AQI
32AQI
12th April 2025
38AQI
38AQI
13th April 2025
24AQI
24AQI
14th April 2025
34AQI
34AQI
15th April 2025
29AQI
29AQI
16th April 2025
15AQI
15AQI
17th April 2025
17AQI
17AQI
18th April 2025
27AQI
27AQI
19th April 2025
43AQI
43AQI
20th April 2025
17AQI
17AQI
21st April 2025
21AQI
21AQI
22nd April 2025
23AQI
23AQI
23rd April 2025
18AQI
18AQI
24th April 2025
23AQI
23AQI
25th April 2025
23AQI
23AQI
26th April 2025
25AQI
25AQI
27th April 2025
15AQI
15AQI
28th April 2025
24AQI
24AQI
29th April 2025
31AQI
31AQI
30th April 2025
19AQI
19AQI
1st May 2025
18AQI
18AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
17AQI
17AQI
4th May 2025
30AQI
30AQI
5th May 2025
21AQI
21AQI
6th May 2025
23AQI
23AQI
7th May 2025
18AQI
18AQI
8th May 2025
17AQI
17AQI
9th May 2025
19AQI
19AQI
10th May 2025
23AQI
23AQI
11th May 2025
17AQI
17AQI
12th May 2025
23AQI
23AQI
13th May 2025
36AQI
36AQI
14th May 2025
39AQI
39AQI
15th May 2025
30AQI
30AQI
16th May 2025
43AQI
43AQI
17th May 2025
43AQI
43AQI
18th May 2025
21AQI
21AQI
19th May 2025
14AQI
14AQI
20th May 2025
15AQI
15AQI
21st May 2025
19AQI
19AQI
22nd May 2025
16AQI
16AQI
23rd May 2025
16AQI
16AQI
24th May 2025
14AQI
14AQI
25th May 2025
17AQI
17AQI
26th May 2025
24AQI
24AQI
27th May 2025
26AQI
26AQI
28th May 2025
33AQI
33AQI
29th May 2025
33AQI
33AQI
30th May 2025
26AQI
26AQI
31st May 2025
30AQI
30AQI
1st June 2025
14AQI
14AQI
2nd June 2025
17AQI
17AQI
3rd June 2025
26AQI
26AQI
4th June 2025
42AQI
42AQI
5th June 2025
43AQI
43AQI
6th June 2025
53AQI
53AQI
7th June 2025
58AQI
58AQI
8th June 2025
58AQI
58AQI
9th June 2025
59AQI
59AQI
10th June 2025
49AQI
49AQI
11th June 2025
49AQI
49AQI
12th June 2025
56AQI
56AQI
13th June 2025
34AQI
34AQI
14th June 2025
30AQI
30AQI
15th June 2025
30AQI
30AQI
16th June 2025
40AQI
40AQI
17th June 2025
44AQI
44AQI
18th June 2025
32AQI
32AQI
19th June 2025
36AQI
36AQI
20th June 2025
26AQI
26AQI
21st June 2025
24AQI
24AQI
22nd June 2025
24AQI
24AQI
23rd June 2025
34AQI
34AQI
24th June 2025
47AQI
47AQI
25th June 2025
46AQI
46AQI
26th June 2025
33AQI
33AQI
27th June 2025
31AQI
31AQI
28th June 2025
28AQI
28AQI
29th June 2025
32AQI
32AQI
30th June 2025
29AQI
29AQI
1st July 2025
31AQI
31AQI
2nd July 2025
29AQI
29AQI
3rd July 2025
36AQI
36AQI
4th July 2025
29AQI
29AQI
5th July 2025
27AQI
27AQI
6th July 2025
36AQI
36AQI
7th July 2025
41AQI
41AQI
8th July 2025
32AQI
32AQI
9th July 2025
39AQI
39AQI
10th July 2025
43AQI
43AQI
11th July 2025
47AQI
47AQI
12th July 2025
51AQI
51AQI
13th July 2025
45AQI
45AQI
14th July 2025
41AQI
41AQI
15th July 2025
40AQI
40AQI
16th July 2025
46AQI
46AQI
17th July 2025
48AQI
48AQI
18th July 2025
30AQI
30AQI
19th July 2025
30AQI
30AQI
20th July 2025
36AQI
36AQI
21st July 2025
37AQI
37AQI
22nd July 2025
24AQI
24AQI
23rd July 2025
23AQI
23AQI
24th July 2025
29AQI
29AQI
25th July 2025
35AQI
35AQI
26th July 2025
47AQI
47AQI
27th July 2025
55AQI
55AQI
28th July 2025
55AQI
55AQI
29th July 2025
55AQI
55AQI
30th July 2025
60AQI
60AQI
31st July 2025
49AQI
49AQI
1st August 2025
26AQI
26AQI
2nd August 2025
30AQI
30AQI
3rd August 2025
52AQI
52AQI
4th August 2025
70AQI
70AQI
32AQI
31AQI
32AQI
23AQI
24AQI
37AQI
40AQI
45AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202532AQI
29
2
25
3
28
3
30
31
25
5
26
5
2
2
196
20
Highest AQI recorded in
August45AQI
Lowest AQI recorded in
April23AQI
202431AQI
28
3
25
4
30
1
30
31
23
5
28
3
21
10
24
6
31
30
25
5
1
326
37
1
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
November24AQI
202333AQI
30
1
25
3
30
1
30
28
3
19
7
3
1
21
9
1
30
1
25
5
28
3
29
25
6
320
39
4
1
Highest AQI recorded in
June50AQI
Lowest AQI recorded in
November26AQI
202230AQI
22
9
20
1
29
2
23
1
30
1
29
1
19
2
1
28
27
4
30
30
1
288
22
Highest AQI recorded in
January43AQI
Lowest AQI recorded in
September21AQI
202129AQI
25
5
24
4
31
30
30
1
30
28
3
28
3
30
30
1
28
2
28
3
342
22
Highest AQI recorded in
February36AQI
Lowest AQI recorded in
September17AQI
202023AQI
12
21
18
28
2
31
31
30
31
27
3
27
256
5
Highest AQI recorded in
November33AQI
Lowest AQI recorded in
April18AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
33AQILeast Polluted Year Recorded
2020(Avg.)
23AQIMontreal's annual 2025 AQI (32) shows an average percentage change of 10.1% (worsened AQI) compared to previous years: 2020 (23), 2021 (29), 2022 (30), 2023 (33), 2024 (31).
