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+
July Air Quality Analysis
Montreal, Quebec, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Jul 2023
112AQILowest AQI recorded on
2nd Jul 2021
10AQISame Day Analysis (29th July ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 55 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 29th Jul - 30th Jul 2025
Montreal, Quebec, Canada
AQI
Day
Night
.
5 AM29th Jul 2025
8 PM
4 AM30th Jul 2025
Day time
Avg. Highest Time
5AM29th Jul
58AQI
Avg. Lowest Time
3PM29th Jul
42AQI
Night time
Avg. Highest Time
4AM30th Jul
59AQI
Avg. Lowest Time
9PM29th Jul
56AQI
In the last 24 hours,
Montreal's AQI reached its highest point of 59 at 4 AM during the Night, while the lowest point, 42, was recorded at 3 PM during the Day between 29th Jul and 30th Jul 2025.
Day & Night AQI Trend : Jun - Jul 2025
Montreal, Quebec, Canada
JunJul
30th - 01st01st - 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
30th Jun 2025285 AMAQI
30th Jun 2025276 AMAQI
30th Jun 2025287 AMAQI
30th Jun 2025288 AMAQI
30th Jun 2025289 AMAQI
30th Jun 20252910 AMAQI
30th Jun 20253011 AMAQI
30th Jun 20252912 PMAQI
30th Jun 2025301 PMAQI
30th Jun 2025302 PMAQI
30th Jun 2025313 PMAQI
30th Jun 2025334 PMAQI
30th Jun 2025345 PMAQI
30th Jun 2025346 PMAQI
30th Jun 2025347 PMAQI
30th Jun 2025358 PMAQI
30th Jun 2025319 PMAQI
30th Jun 20253110 PMAQI
30th Jun 20253311 PMAQI
1st Jul 20253412 AMAQI
1st Jul 2025331 AMAQI
1st Jul 2025342 AMAQI
1st Jul 2025353 AMAQI
1st Jul 2025354 AMAQI
25°C16/32°C
1st Jul 2025375 AMAQI
1st Jul 2025356 AMAQI
1st Jul 2025367 AMAQI
1st Jul 2025358 AMAQI
1st Jul 2025339 AMAQI
1st Jul 20253210 AMAQI
1st Jul 20253111 AMAQI
1st Jul 20253212 PMAQI
1st Jul 2025321 PMAQI
1st Jul 2025332 PMAQI
1st Jul 2025343 PMAQI
1st Jul 2025344 PMAQI
1st Jul 2025345 PMAQI
1st Jul 2025356 PMAQI
1st Jul 2025357 PMAQI
1st Jul 2025348 PMAQI
1st Jul 2025349 PMAQI
1st Jul 20253410 PMAQI
1st Jul 20253111 PMAQI
2nd Jul 20253012 AMAQI
2nd Jul 2025311 AMAQI
2nd Jul 2025312 AMAQI
2nd Jul 2025263 AMAQI
2nd Jul 2025244 AMAQI
24°C20/30°C
2nd Jul 2025245 AMAQI
2nd Jul 2025256 AMAQI
2nd Jul 2025257 AMAQI
2nd Jul 2025298 AMAQI
2nd Jul 2025319 AMAQI
2nd Jul 20253110 AMAQI
2nd Jul 20253111 AMAQI
2nd Jul 20253112 PMAQI
2nd Jul 2025311 PMAQI
2nd Jul 2025332 PMAQI
2nd Jul 2025343 PMAQI
2nd Jul 2025354 PMAQI
2nd Jul 2025355 PMAQI
2nd Jul 2025356 PMAQI
2nd Jul 2025357 PMAQI
2nd Jul 2025358 PMAQI
2nd Jul 2025349 PMAQI
2nd Jul 20253210 PMAQI
2nd Jul 20252811 PMAQI
3rd Jul 20252812 AMAQI
3rd Jul 2025281 AMAQI
3rd Jul 2025282 AMAQI
3rd Jul 2025283 AMAQI
3rd Jul 2025284 AMAQI
25°C20/31°C
3rd Jul 2025285 AMAQI
3rd Jul 2025456 AMAQI
3rd Jul 2025497 AMAQI
3rd Jul 2025478 AMAQI
3rd Jul 2025439 AMAQI
3rd Jul 20254410 AMAQI
3rd Jul 20254311 AMAQI
3rd Jul 20254412 PMAQI
3rd Jul 2025441 PMAQI
3rd Jul 2025442 PMAQI
3rd Jul 2025423 PMAQI
3rd Jul 2025414 PMAQI
3rd Jul 2025385 PMAQI
3rd Jul 2025386 PMAQI
3rd Jul 2025387 PMAQI
3rd Jul 2025408 PMAQI
3rd Jul 2025379 PMAQI
3rd Jul 20253810 PMAQI
3rd Jul 20254011 PMAQI
4th Jul 20253812 AMAQI
4th Jul 2025331 AMAQI
4th Jul 2025292 AMAQI
4th Jul 2025243 AMAQI
4th Jul 2025224 AMAQI
23°C19/28°C
4th Jul 2025215 AMAQI
4th Jul 2025216 AMAQI
4th Jul 2025207 AMAQI
4th Jul 2025238 AMAQI
4th Jul 2025249 AMAQI
4th Jul 20252310 AMAQI
4th Jul 20252211 AMAQI
4th Jul 20252212 PMAQI
4th Jul 2025211 PMAQI
4th Jul 2025212 PMAQI
4th Jul 2025213 PMAQI
4th Jul 2025224 PMAQI
4th Jul 2025215 PMAQI
4th Jul 2025226 PMAQI
4th Jul 2025227 PMAQI
4th Jul 2025228 PMAQI
4th Jul 2025229 PMAQI
4th Jul 20252310 PMAQI
4th Jul 20252411 PMAQI
5th Jul 20252612 AMAQI
5th Jul 2025271 AMAQI
5th Jul 2025272 AMAQI
5th Jul 2025263 AMAQI
5th Jul 2025284 AMAQI
21°C14/28°C
5th Jul 2025275 AMAQI
5th Jul 2025286 AMAQI
5th Jul 2025307 AMAQI
5th Jul 2025298 AMAQI
5th Jul 2025289 AMAQI
5th Jul 20252810 AMAQI
5th Jul 20252811 AMAQI
5th Jul 20252812 PMAQI
5th Jul 2025281 PMAQI
5th Jul 2025272 PMAQI
5th Jul 2025273 PMAQI
5th Jul 2025274 PMAQI
5th Jul 2025265 PMAQI
5th Jul 2025266 PMAQI
5th Jul 2025277 PMAQI
5th Jul 2025278 PMAQI
5th Jul 2025279 PMAQI
5th Jul 20252610 PMAQI
5th Jul 20252611 PMAQI
6th Jul 20252912 AMAQI
6th Jul 2025311 AMAQI
6th Jul 2025342 AMAQI
6th Jul 2025373 AMAQI
6th Jul 2025404 AMAQI
23°C15/29°C
6th Jul 2025425 AMAQI
6th Jul 2025456 AMAQI
6th Jul 2025467 AMAQI
6th Jul 2025468 AMAQI
6th Jul 2025459 AMAQI
6th Jul 20254410 AMAQI
6th Jul 20254411 AMAQI
6th Jul 20254412 PMAQI
6th Jul 2025441 PMAQI
6th Jul 2025442 PMAQI
6th Jul 2025423 PMAQI
6th Jul 2025434 PMAQI
6th Jul 2025415 PMAQI
6th Jul 2025416 PMAQI
6th Jul 2025417 PMAQI
6th Jul 2025418 PMAQI
6th Jul 2025429 PMAQI
6th Jul 20254310 PMAQI
6th Jul 20254111 PMAQI
7th Jul 20254312 AMAQI
7th Jul 2025421 AMAQI
7th Jul 2025422 AMAQI
7th Jul 2025433 AMAQI
7th Jul 2025454 AMAQI
28°C20/37°C
7th Jul 2025435 AMAQI
7th Jul 2025416 AMAQI
7th Jul 2025357 AMAQI
7th Jul 2025388 AMAQI
7th Jul 2025469 AMAQI
7th Jul 20254910 AMAQI
7th Jul 20254911 AMAQI
7th Jul 20254912 PMAQI
7th Jul 2025491 PMAQI
7th Jul 2025502 PMAQI
7th Jul 2025503 PMAQI
7th Jul 2025474 PMAQI
7th Jul 2025425 PMAQI
7th Jul 2025376 PMAQI
7th Jul 2025357 PMAQI
7th Jul 2025338 PMAQI
7th Jul 2025429 PMAQI
7th Jul 20254010 PMAQI
7th Jul 20253211 PMAQI
8th Jul 20253412 AMAQI
8th Jul 2025361 AMAQI
8th Jul 2025352 AMAQI
8th Jul 2025293 AMAQI
8th Jul 2025274 AMAQI
18°C15/23°C
8th Jul 2025255 AMAQI
8th Jul 2025256 AMAQI
8th Jul 2025277 AMAQI
8th Jul 2025288 AMAQI
8th Jul 2025289 AMAQI
8th Jul 20252810 AMAQI
8th Jul 20253011 AMAQI
8th Jul 20253112 PMAQI
8th Jul 2025331 PMAQI
8th Jul 2025352 PMAQI
8th Jul 2025393 PMAQI
8th Jul 2025374 PMAQI
8th Jul 2025355 PMAQI
8th Jul 2025346 PMAQI
8th Jul 2025337 PMAQI
8th Jul 2025328 PMAQI
8th Jul 2025319 PMAQI
8th Jul 20253110 PMAQI
8th Jul 20253111 PMAQI
9th Jul 20253212 AMAQI
9th Jul 2025331 AMAQI
9th Jul 2025342 AMAQI
9th Jul 2025393 AMAQI
9th Jul 2025414 AMAQI
22°C16/30°C
9th Jul 2025425 AMAQI
9th Jul 2025446 AMAQI
9th Jul 2025457 AMAQI
9th Jul 2025468 AMAQI
9th Jul 2025459 AMAQI
9th Jul 20254410 AMAQI
9th Jul 20254511 AMAQI
9th Jul 20254412 PMAQI
9th Jul 2025431 PMAQI
9th Jul 2025432 PMAQI
9th Jul 2025433 PMAQI
9th Jul 2025434 PMAQI
9th Jul 2025435 PMAQI
9th Jul 2025436 PMAQI
9th Jul 2025427 PMAQI
9th Jul 2025438 PMAQI
9th Jul 2025429 PMAQI
9th Jul 20254210 PMAQI
9th Jul 20254111 PMAQI
10th Jul 20254012 AMAQI
10th Jul 2025421 AMAQI
10th Jul 2025422 AMAQI
10th Jul 2025453 AMAQI
10th Jul 2025484 AMAQI
24°C17/31°C
10th Jul 2025485 AMAQI
10th Jul 2025486 AMAQI
10th Jul 2025487 AMAQI
10th Jul 2025488 AMAQI
10th Jul 2025469 AMAQI
10th Jul 20254710 AMAQI
10th Jul 20254711 AMAQI
10th Jul 20254812 PMAQI
10th Jul 2025471 PMAQI
10th Jul 2025462 PMAQI
10th Jul 2025463 PMAQI
10th Jul 2025464 PMAQI
10th Jul 2025485 PMAQI
10th Jul 2025476 PMAQI
10th Jul 2025487 PMAQI
10th Jul 2025488 PMAQI
10th Jul 2025469 PMAQI
10th Jul 20254310 PMAQI
10th Jul 20254411 PMAQI
11th Jul 20254212 AMAQI
11th Jul 2025441 AMAQI
11th Jul 2025452 AMAQI
11th Jul 2025493 AMAQI
11th Jul 2025494 AMAQI
25°C19/30°C
11th Jul 2025495 AMAQI
11th Jul 2025496 AMAQI
11th Jul 2025487 AMAQI
11th Jul 2025488 AMAQI
11th Jul 2025489 AMAQI
11th Jul 20254910 AMAQI
11th Jul 20255111 AMAQI
11th Jul 20255012 PMAQI
11th Jul 2025501 PMAQI
11th Jul 2025502 PMAQI
11th Jul 2025503 PMAQI
11th Jul 2025524 PMAQI
11th Jul 2025505 PMAQI
11th Jul 2025516 PMAQI
11th Jul 2025517 PMAQI
11th Jul 2025518 PMAQI
11th Jul 2025479 PMAQI
11th Jul 20254610 PMAQI
11th Jul 20254611 PMAQI
12th Jul 20254812 AMAQI
12th Jul 2025491 AMAQI
12th Jul 2025492 AMAQI
12th Jul 2025523 AMAQI
12th Jul 2025544 AMAQI
26°C19/33°C
12th Jul 2025535 AMAQI
12th Jul 2025516 AMAQI
12th Jul 2025517 AMAQI
12th Jul 2025528 AMAQI
12th Jul 2025529 AMAQI
12th Jul 20255210 AMAQI
12th Jul 20255211 AMAQI
12th Jul 20255312 PMAQI
12th Jul 2025531 PMAQI
12th Jul 2025532 PMAQI
12th Jul 2025543 PMAQI
12th Jul 2025534 PMAQI
12th Jul 2025535 PMAQI
12th Jul 2025536 PMAQI
12th Jul 2025537 PMAQI
12th Jul 2025538 PMAQI
12th Jul 2025539 PMAQI
12th Jul 20255210 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255112 AMAQI
13th Jul 2025511 AMAQI
13th Jul 2025512 AMAQI
13th Jul 2025463 AMAQI
13th Jul 2025434 AMAQI
27°C20/34°C
13th Jul 2025425 AMAQI
13th Jul 2025406 AMAQI
13th Jul 2025407 AMAQI
13th Jul 2025408 AMAQI
13th Jul 2025409 AMAQI
13th Jul 20253910 AMAQI
13th Jul 20254011 AMAQI
13th Jul 20254012 PMAQI
13th Jul 2025411 PMAQI
13th Jul 2025402 PMAQI
13th Jul 2025413 PMAQI
13th Jul 2025424 PMAQI
13th Jul 2025435 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025417 PMAQI
13th Jul 2025418 PMAQI
13th Jul 2025429 PMAQI
13th Jul 20254210 PMAQI
13th Jul 20254011 PMAQI
14th Jul 20254212 AMAQI
14th Jul 2025431 AMAQI
14th Jul 2025422 AMAQI
14th Jul 2025403 AMAQI
14th Jul 2025384 AMAQI
26°C23/30°C
14th Jul 2025365 AMAQI
14th Jul 2025366 AMAQI
14th Jul 2025357 AMAQI
14th Jul 2025358 AMAQI
14th Jul 2025379 AMAQI
14th Jul 20253910 AMAQI
14th Jul 20254411 AMAQI
14th Jul 20254812 PMAQI
14th Jul 2025491 PMAQI
14th Jul 2025492 PMAQI
14th Jul 2025433 PMAQI
14th Jul 2025434 PMAQI
14th Jul 2025425 PMAQI
14th Jul 2025426 PMAQI
14th Jul 2025427 PMAQI
14th Jul 2025428 PMAQI
14th Jul 2025439 PMAQI
14th Jul 20254310 PMAQI
14th Jul 20254011 PMAQI
15th Jul 20254012 AMAQI
15th Jul 2025411 AMAQI
15th Jul 2025402 AMAQI
15th Jul 2025353 AMAQI
15th Jul 2025304 AMAQI
27°C22/32°C
15th Jul 2025365 AMAQI
15th Jul 2025366 AMAQI
15th Jul 2025417 AMAQI
15th Jul 2025418 AMAQI
15th Jul 2025459 AMAQI
15th Jul 20254510 AMAQI
15th Jul 20254511 AMAQI
15th Jul 20254412 PMAQI
15th Jul 2025441 PMAQI
15th Jul 2025452 PMAQI
15th Jul 2025463 PMAQI
15th Jul 2025464 PMAQI
15th Jul 2025435 PMAQI
15th Jul 2025436 PMAQI
15th Jul 2025437 PMAQI
15th Jul 2025428 PMAQI
15th Jul 2025429 PMAQI
15th Jul 20254110 PMAQI
15th Jul 20254111 PMAQI
16th Jul 20254212 AMAQI
16th Jul 2025411 AMAQI
16th Jul 2025422 AMAQI
16th Jul 2025433 AMAQI
16th Jul 2025504 AMAQI
27°C20/33°C
16th Jul 2025515 AMAQI
16th Jul 2025506 AMAQI
16th Jul 2025527 AMAQI
16th Jul 2025548 AMAQI
16th Jul 2025519 AMAQI
16th Jul 20255210 AMAQI
16th Jul 20255111 AMAQI
16th Jul 20255112 PMAQI
16th Jul 2025511 PMAQI
16th Jul 2025512 PMAQI
16th Jul 2025513 PMAQI
16th Jul 2025504 PMAQI
16th Jul 2025505 PMAQI
16th Jul 2025506 PMAQI
16th Jul 2025507 PMAQI
16th Jul 2025508 PMAQI
16th Jul 2025509 PMAQI
16th Jul 20254910 PMAQI
16th Jul 20255011 PMAQI
17th Jul 20254912 AMAQI
17th Jul 2025501 AMAQI
17th Jul 2025502 AMAQI
17th Jul 2025533 AMAQI
17th Jul 2025584 AMAQI
29°C22/36°C
17th Jul 2025545 AMAQI
17th Jul 2025516 AMAQI
17th Jul 2025477 AMAQI
17th Jul 2025478 AMAQI
17th Jul 2025499 AMAQI
17th Jul 20254810 AMAQI
17th Jul 20254711 AMAQI
17th Jul 20254512 PMAQI
17th Jul 2025451 PMAQI
17th Jul 2025432 PMAQI
17th Jul 2025433 PMAQI
17th Jul 2025444 PMAQI
17th Jul 2025445 PMAQI
17th Jul 2025446 PMAQI
17th Jul 2025427 PMAQI
17th Jul 2025418 PMAQI
17th Jul 2025469 PMAQI
17th Jul 20254510 PMAQI
17th Jul 20253511 PMAQI
18th Jul 20253412 AMAQI
18th Jul 2025331 AMAQI
18th Jul 2025302 AMAQI
18th Jul 2025213 AMAQI
18th Jul 2025174 AMAQI
27°C18/31°C
18th Jul 2025155 AMAQI
18th Jul 2025156 AMAQI
18th Jul 2025157 AMAQI
18th Jul 2025168 AMAQI
18th Jul 2025189 AMAQI
18th Jul 20251910 AMAQI
18th Jul 20252011 AMAQI
18th Jul 20252012 PMAQI
18th Jul 2025211 PMAQI
18th Jul 2025222 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025245 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025257 PMAQI
18th Jul 2025268 PMAQI
18th Jul 2025239 PMAQI
18th Jul 20252310 PMAQI
18th Jul 20252911 PMAQI
19th Jul 20252912 AMAQI
19th Jul 2025291 AMAQI
19th Jul 2025302 AMAQI
19th Jul 2025303 AMAQI
19th Jul 2025314 AMAQI
21°C14/28°C
19th Jul 2025305 AMAQI
19th Jul 2025296 AMAQI
19th Jul 2025287 AMAQI
19th Jul 2025288 AMAQI
19th Jul 2025289 AMAQI
19th Jul 20252710 AMAQI
19th Jul 20252711 AMAQI
19th Jul 20252912 PMAQI
19th Jul 2025321 PMAQI
19th Jul 2025362 PMAQI
19th Jul 2025403 PMAQI
19th Jul 2025384 PMAQI
19th Jul 2025395 PMAQI
19th Jul 2025406 PMAQI
19th Jul 2025417 PMAQI
19th Jul 2025418 PMAQI
19th Jul 2025359 PMAQI
19th Jul 20253410 PMAQI
19th Jul 20254311 PMAQI
20th Jul 20254012 AMAQI
20th Jul 2025401 AMAQI
20th Jul 2025422 AMAQI
20th Jul 2025443 AMAQI
20th Jul 2025484 AMAQI
22°C15/29°C
20th Jul 2025475 AMAQI
20th Jul 2025466 AMAQI
20th Jul 2025427 AMAQI
20th Jul 2025408 AMAQI
20th Jul 2025389 AMAQI
20th Jul 20253610 AMAQI
20th Jul 20253411 AMAQI
20th Jul 20253312 PMAQI
20th Jul 2025321 PMAQI
20th Jul 2025322 PMAQI
20th Jul 2025313 PMAQI
20th Jul 2025324 PMAQI
20th Jul 2025345 PMAQI
20th Jul 2025356 PMAQI
20th Jul 2025347 PMAQI
20th Jul 2025358 PMAQI
20th Jul 2025399 PMAQI
20th Jul 20253910 PMAQI
20th Jul 20254111 PMAQI
21st Jul 20254112 AMAQI
21st Jul 2025371 AMAQI
21st Jul 2025382 AMAQI
21st Jul 2025473 AMAQI
21st Jul 2025534 AMAQI
22°C17/29°C
21st Jul 2025455 AMAQI
21st Jul 2025366 AMAQI
21st Jul 2025327 AMAQI
21st Jul 2025308 AMAQI
21st Jul 2025309 AMAQI
21st Jul 20252810 AMAQI
21st Jul 20252611 AMAQI
21st Jul 20252512 PMAQI
21st Jul 2025241 PMAQI
21st Jul 2025232 PMAQI
21st Jul 2025223 PMAQI
21st Jul 2025244 PMAQI
21st Jul 2025255 PMAQI
21st Jul 2025256 PMAQI
21st Jul 2025267 PMAQI
21st Jul 2025258 PMAQI
21st Jul 2025269 PMAQI
21st Jul 20252410 PMAQI
21st Jul 20252311 PMAQI
22nd Jul 20252312 AMAQI
22nd Jul 2025231 AMAQI
22nd Jul 2025232 AMAQI
22nd Jul 2025203 AMAQI
22nd Jul 2025184 AMAQI
19°C15/24°C
22nd Jul 2025195 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025188 AMAQI
22nd Jul 2025199 AMAQI
22nd Jul 20251910 AMAQI
22nd Jul 20251911 AMAQI
22nd Jul 20251912 PMAQI
22nd Jul 2025191 PMAQI
22nd Jul 2025192 PMAQI
22nd Jul 2025193 PMAQI
22nd Jul 2025204 PMAQI
22nd Jul 2025205 PMAQI
22nd Jul 2025206 PMAQI
22nd Jul 2025207 PMAQI
22nd Jul 2025208 PMAQI
22nd Jul 2025199 PMAQI
22nd Jul 20251910 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025221 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025233 AMAQI
23rd Jul 2025234 AMAQI
19°C12/25°C
23rd Jul 2025245 AMAQI
23rd Jul 2025246 AMAQI
23rd Jul 2025257 AMAQI
23rd Jul 2025268 AMAQI
23rd Jul 2025279 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20253011 AMAQI
23rd Jul 20253012 PMAQI
23rd Jul 2025271 PMAQI
23rd Jul 2025252 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 2025261 AMAQI
24th Jul 2025272 AMAQI
24th Jul 2025273 AMAQI
24th Jul 2025284 AMAQI
22°C13/30°C
24th Jul 2025275 AMAQI
24th Jul 2025276 AMAQI
24th Jul 2025277 AMAQI
24th Jul 2025288 AMAQI
24th Jul 2025309 AMAQI
24th Jul 20253210 AMAQI
24th Jul 20253611 AMAQI
24th Jul 20254112 PMAQI
24th Jul 2025401 PMAQI
24th Jul 2025402 PMAQI
24th Jul 2025423 PMAQI
24th Jul 2025374 PMAQI
24th Jul 2025335 PMAQI
24th Jul 2025326 PMAQI
24th Jul 2025367 PMAQI
24th Jul 2025388 PMAQI
24th Jul 2025379 PMAQI
24th Jul 20253810 PMAQI
24th Jul 20254011 PMAQI
25th Jul 20253712 AMAQI
25th Jul 2025321 AMAQI
25th Jul 2025342 AMAQI
25th Jul 2025443 AMAQI
25th Jul 2025444 AMAQI
27°C17/36°C
25th Jul 2025375 AMAQI
25th Jul 2025346 AMAQI
25th Jul 2025347 AMAQI
25th Jul 2025338 AMAQI
25th Jul 2025339 AMAQI
25th Jul 20253210 AMAQI
25th Jul 20253211 AMAQI
25th Jul 20253212 PMAQI
25th Jul 2025341 PMAQI
25th Jul 2025402 PMAQI
25th Jul 2025433 PMAQI
25th Jul 2025424 PMAQI
25th Jul 2025375 PMAQI
25th Jul 2025376 PMAQI
25th Jul 2025367 PMAQI
25th Jul 2025378 PMAQI
25th Jul 2025439 PMAQI
25th Jul 20254310 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253612 AMAQI
26th Jul 2025371 AMAQI
26th Jul 2025372 AMAQI
26th Jul 2025453 AMAQI
26th Jul 2025464 AMAQI
26°C23/31°C
26th Jul 2025465 AMAQI
26th Jul 2025536 AMAQI
26th Jul 2025587 AMAQI
26th Jul 2025548 AMAQI
26th Jul 2025509 AMAQI
26th Jul 20255410 AMAQI
26th Jul 20255211 AMAQI
26th Jul 20255012 PMAQI
26th Jul 2025511 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025493 PMAQI
26th Jul 2025494 PMAQI
26th Jul 2025515 PMAQI
26th Jul 2025516 PMAQI
26th Jul 2025517 PMAQI
26th Jul 2025518 PMAQI
26th Jul 2025519 PMAQI
26th Jul 20255110 PMAQI
26th Jul 20254911 PMAQI
27th Jul 20255112 AMAQI
27th Jul 2025501 AMAQI
27th Jul 2025522 AMAQI
27th Jul 2025513 AMAQI
27th Jul 2025604 AMAQI
25°C16/33°C
27th Jul 2025575 AMAQI
27th Jul 2025576 AMAQI
27th Jul 2025577 AMAQI
27th Jul 2025558 AMAQI
27th Jul 2025589 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 2025585 PMAQI
27th Jul 2025586 PMAQI
27th Jul 2025587 PMAQI
27th Jul 2025588 PMAQI
27th Jul 2025569 PMAQI
27th Jul 20255610 PMAQI
27th Jul 20255611 PMAQI
28th Jul 20255512 AMAQI
28th Jul 2025551 AMAQI
28th Jul 2025562 AMAQI
28th Jul 2025543 AMAQI
28th Jul 2025554 AMAQI
24°C19/32°C
28th Jul 2025565 AMAQI
28th Jul 2025596 AMAQI
28th Jul 2025597 AMAQI
28th Jul 2025608 AMAQI
28th Jul 2025609 AMAQI
28th Jul 20255910 AMAQI
28th Jul 20255911 AMAQI
28th Jul 20255912 PMAQI
28th Jul 2025591 PMAQI
28th Jul 2025602 PMAQI
28th Jul 2025593 PMAQI
28th Jul 2025574 PMAQI
28th Jul 2025575 PMAQI
28th Jul 2025576 PMAQI
28th Jul 2025577 PMAQI
28th Jul 2025578 PMAQI
28th Jul 2025599 PMAQI
28th Jul 20255910 PMAQI
28th Jul 20255811 PMAQI
29th Jul 20255812 AMAQI
29th Jul 2025581 AMAQI
29th Jul 2025582 AMAQI
29th Jul 2025593 AMAQI
29th Jul 2025594 AMAQI
27°C21/34°C
29th Jul 2025585 AMAQI
29th Jul 2025576 AMAQI
29th Jul 2025577 AMAQI
29th Jul 2025578 AMAQI
29th Jul 2025569 AMAQI
29th Jul 20255310 AMAQI
29th Jul 20255011 AMAQI
29th Jul 20254512 PMAQI
29th Jul 2025431 PMAQI
29th Jul 2025422 PMAQI
29th Jul 2025423 PMAQI
29th Jul 2025464 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025536 PMAQI
29th Jul 2025547 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025569 PMAQI
29th Jul 20255710 PMAQI
29th Jul 20255811 PMAQI
30th Jul 20255812 AMAQI
30th Jul 2025581 AMAQI
30th Jul 2025582 AMAQI
30th Jul 2025583 AMAQI
30th Jul 2025594 AMAQI
25°C22/29°C
30th Jul 2025625 AMAQI
5 AM30th Jul 2025626 AMAQI
12 PM
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
39AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
39AQI
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. 39), while the lowest AQI was between 5 AM to 8 PM (Avg. 39).
Night time
Avg. Highest Time
12 AM - 11 PM
39AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
39AQI
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. 39), while the lowest AQI was between 12 AM to 11 PM (Avg. 39).
2025 Days Vs Air Quality
Montreal, Quebec, Canada
2025
90%
190
10%
20
Total number of days with different AQI categories in last 211 days in 2025 (154 days remaining)
Good
190 DaysModerate
20 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 90%
Health Risk Level:
Very Low
In 2025, 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
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
32AQI
32AQI
2nd January 2025
24AQI
24AQI
3rd January 2025
21AQI
21AQI
4th January 2025
21AQI
21AQI
5th January 2025
23AQI
23AQI
6th January 2025
26AQI
26AQI
7th January 2025
22AQI
22AQI
8th January 2025
22AQI
22AQI
9th January 2025
21AQI
21AQI
10th January 2025
22AQI
22AQI
11th January 2025
38AQI
38AQI
12th January 2025
30AQI
30AQI
13th January 2025
57AQI
57AQI
14th January 2025
33AQI
33AQI
15th January 2025
23AQI
23AQI
16th January 2025
28AQI
28AQI
17th January 2025
59AQI
59AQI
18th January 2025
45AQI
45AQI
19th January 2025
27AQI
27AQI
20th January 2025
24AQI
24AQI
21st January 2025
36AQI
36AQI
22nd January 2025
45AQI
45AQI
23rd January 2025
42AQI
42AQI
24th January 2025
44AQI
44AQI
25th January 2025
45AQI
45AQI
26th January 2025
36AQI
36AQI
27th January 2025
24AQI
24AQI
28th January 2025
25AQI
25AQI
29th January 2025
28AQI
28AQI
30th January 2025
24AQI
24AQI
31st January 2025
46AQI
46AQI
1st February 2025
23AQI
23AQI
2nd February 2025
36AQI
36AQI
3rd February 2025
55AQI
55AQI
4th February 2025
27AQI
27AQI
5th February 2025
23AQI
23AQI
6th February 2025
35AQI
35AQI
7th February 2025
33AQI
33AQI
8th February 2025
27AQI
27AQI
9th February 2025
34AQI
34AQI
10th February 2025
25AQI
25AQI
11th February 2025
28AQI
28AQI
12th February 2025
30AQI
30AQI
13th February 2025
27AQI
27AQI
14th February 2025
21AQI
21AQI
15th February 2025
23AQI
23AQI
16th February 2025
23AQI
23AQI
17th February 2025
21AQI
21AQI
18th February 2025
21AQI
21AQI
19th February 2025
22AQI
22AQI
20th February 2025
28AQI
28AQI
21st February 2025
22AQI
22AQI
22nd February 2025
27AQI
27AQI
23rd February 2025
52AQI
52AQI
24th February 2025
48AQI
48AQI
25th February 2025
59AQI
59AQI
26th February 2025
54AQI
54AQI
27th February 2025
47AQI
47AQI
28th February 2025
32AQI
32AQI
1st March 2025
26AQI
26AQI
2nd March 2025
23AQI
23AQI
3rd March 2025
35AQI
35AQI
4th March 2025
38AQI
38AQI
5th March 2025
55AQI
55AQI
6th March 2025
20AQI
20AQI
7th March 2025
23AQI
23AQI
8th March 2025
26AQI
26AQI
9th March 2025
24AQI
24AQI
10th March 2025
30AQI
30AQI
11th March 2025
44AQI
44AQI
12th March 2025
23AQI
23AQI
13th March 2025
44AQI
44AQI
14th March 2025
83AQI
83AQI
15th March 2025
61AQI
61AQI
16th March 2025
52AQI
52AQI
17th March 2025
24AQI
24AQI
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
25AQI
25AQI
25th March 2025
25AQI
25AQI
26th March 2025
22AQI
22AQI
27th March 2025
20AQI
20AQI
28th March 2025
22AQI
22AQI
29th March 2025
21AQI
21AQI
30th March 2025
25AQI
25AQI
31st March 2025
32AQI
32AQI
1st April 2025
18AQI
18AQI
2nd April 2025
20AQI
20AQI
3rd April 2025
21AQI
21AQI
4th April 2025
19AQI
19AQI
5th April 2025
21AQI
21AQI
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
34AQI
34AQI
12th April 2025
41AQI
41AQI
13th April 2025
26AQI
26AQI
14th April 2025
34AQI
34AQI
15th April 2025
29AQI
29AQI
16th April 2025
15AQI
15AQI
17th April 2025
17AQI
17AQI
18th April 2025
28AQI
28AQI
19th April 2025
44AQI
44AQI
20th April 2025
16AQI
16AQI
21st April 2025
21AQI
21AQI
22nd April 2025
23AQI
23AQI
23rd April 2025
17AQI
17AQI
24th April 2025
23AQI
23AQI
25th April 2025
23AQI
23AQI
26th April 2025
25AQI
25AQI
27th April 2025
14AQI
14AQI
28th April 2025
23AQI
23AQI
29th April 2025
32AQI
32AQI
30th April 2025
18AQI
18AQI
1st May 2025
19AQI
19AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
16AQI
16AQI
4th May 2025
30AQI
30AQI
5th May 2025
22AQI
22AQI
6th May 2025
22AQI
22AQI
7th May 2025
18AQI
18AQI
8th May 2025
16AQI
16AQI
9th May 2025
19AQI
19AQI
10th May 2025
23AQI
23AQI
11th May 2025
17AQI
17AQI
12th May 2025
23AQI
23AQI
13th May 2025
35AQI
35AQI
14th May 2025
39AQI
39AQI
15th May 2025
30AQI
30AQI
16th May 2025
42AQI
42AQI
17th May 2025
42AQI
42AQI
18th May 2025
21AQI
21AQI
19th May 2025
14AQI
14AQI
20th May 2025
14AQI
14AQI
21st May 2025
19AQI
19AQI
22nd May 2025
16AQI
16AQI
23rd May 2025
16AQI
16AQI
24th May 2025
14AQI
14AQI
25th May 2025
16AQI
16AQI
26th May 2025
24AQI
24AQI
27th May 2025
27AQI
27AQI
28th May 2025
34AQI
34AQI
29th May 2025
33AQI
33AQI
30th May 2025
26AQI
26AQI
31st May 2025
31AQI
31AQI
1st June 2025
15AQI
15AQI
2nd June 2025
18AQI
18AQI
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
47AQI
47AQI
11th June 2025
51AQI
51AQI
12th June 2025
55AQI
55AQI
13th June 2025
29AQI
29AQI
14th June 2025
28AQI
28AQI
15th June 2025
31AQI
31AQI
16th June 2025
44AQI
44AQI
17th June 2025
44AQI
44AQI
18th June 2025
27AQI
27AQI
19th June 2025
39AQI
39AQI
20th June 2025
23AQI
23AQI
21st June 2025
25AQI
25AQI
22nd June 2025
27AQI
27AQI
23rd June 2025
39AQI
39AQI
24th June 2025
50AQI
50AQI
25th June 2025
46AQI
46AQI
26th June 2025
30AQI
30AQI
27th June 2025
30AQI
30AQI
28th June 2025
28AQI
28AQI
29th June 2025
30AQI
30AQI
30th June 2025
30AQI
30AQI
1st July 2025
34AQI
34AQI
2nd July 2025
30AQI
30AQI
3rd July 2025
37AQI
37AQI
4th July 2025
25AQI
25AQI
5th July 2025
27AQI
27AQI
6th July 2025
40AQI
40AQI
7th July 2025
42AQI
42AQI
8th July 2025
32AQI
32AQI
9th July 2025
41AQI
41AQI
10th July 2025
45AQI
45AQI
11th July 2025
48AQI
48AQI
12th July 2025
52AQI
52AQI
13th July 2025
43AQI
43AQI
14th July 2025
41AQI
41AQI
15th July 2025
41AQI
41AQI
16th July 2025
48AQI
48AQI
17th July 2025
47AQI
47AQI
18th July 2025
24AQI
24AQI
19th July 2025
33AQI
33AQI
20th July 2025
39AQI
39AQI
21st July 2025
32AQI
32AQI
22nd July 2025
20AQI
20AQI
23rd July 2025
24AQI
24AQI
24th July 2025
32AQI
32AQI
25th July 2025
37AQI
37AQI
26th July 2025
47AQI
47AQI
27th July 2025
55AQI
55AQI
28th July 2025
57AQI
57AQI
29th July 2025
55AQI
55AQI
32AQI
32AQI
32AQI
24AQI
24AQI
38AQI
39AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202531AQI
29
2
24
4
27
4
30
31
24
6
25
4
190
20
Highest AQI recorded in
July39AQI
Lowest AQI recorded in
April24AQI
202431AQI
29
2
24
5
30
1
30
31
26
4
28
3
21
10
24
6
31
30
25
5
1
329
36
1
Highest AQI recorded in
August39AQI
Lowest AQI recorded in
November24AQI
202333AQI
30
1
24
4
31
30
28
3
21
6
2
1
22
8
1
30
1
25
5
29
2
29
25
6
324
36
3
1
Highest AQI recorded in
June51AQI
Lowest AQI recorded in
November26AQI
202231AQI
21
10
20
2
29
2
30
30
1
30
22
2
3
30
28
3
30
30
1
303
21
Highest AQI recorded in
January43AQI
Lowest AQI recorded in
September23AQI
202129AQI
27
4
24
4
31
29
1
28
3
30
28
3
28
3
30
30
1
28
2
27
4
340
25
Highest AQI recorded in
February36AQI
Lowest AQI recorded in
September19AQI
202024AQI
12
21
19
29
1
31
31
29
1
31
27
3
27
257
5
Highest AQI recorded in
November32AQI
Lowest AQI recorded in
October20AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
33AQILeast Polluted Year Recorded
2020(Avg.)
24AQIMontreal's annual 2025 AQI (31) shows an average percentage change of 6.5% (worsened AQI) compared to previous years: 2020 (24), 2021 (29), 2022 (31), 2023 (33), 2024 (31).
