South Shore Of Montreal, Longueuil, 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
South Shore Of Montreal, Longueuil, Quebec, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
6th Aug 2021
87AQILowest AQI recorded on
9th Aug 2024
13AQISame Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 52 of Moderate air quality, showing improvement over 2024 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 3rd Aug - 4th Aug 2025
South Shore Of Montreal, Longueuil, Quebec, Canada
AQI
Day
Night
.
5 AM3rd Aug 2025
8 PM
4 AM4th Aug 2025
Day time
Avg. Highest Time
1PM3rd Aug
68AQI
Avg. Lowest Time
9AM3rd Aug
36AQI
Night time
Avg. Highest Time
10PM3rd Aug
62AQI
Avg. Lowest Time
4AM4th Aug
50AQI
In the last 24 hours,
South Shore Of Montreal's AQI reached its highest point of 68 at 1 PM during the Day, while the lowest point, 36, was recorded at 9 AM during the Day between 3rd Aug and 4th Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
South Shore Of Montreal, Longueuil, Quebec, Canada
JulAug
05th - 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 - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th
Day
Night
5th Jul 2025265 AMAQI
5th Jul 2025296 AMAQI
5th Jul 2025327 AMAQI
5th Jul 2025298 AMAQI
5th Jul 2025289 AMAQI
5th Jul 20252810 AMAQI
5th Jul 20252811 AMAQI
5th Jul 20252812 PMAQI
5th Jul 2025291 PMAQI
5th Jul 2025282 PMAQI
5th Jul 2025283 PMAQI
5th Jul 2025284 PMAQI
5th Jul 2025275 PMAQI
5th Jul 2025266 PMAQI
5th Jul 2025277 PMAQI
5th Jul 2025288 PMAQI
5th Jul 2025269 PMAQI
5th Jul 20252610 PMAQI
5th Jul 20252511 PMAQI
6th Jul 20252812 AMAQI
6th Jul 2025301 AMAQI
6th Jul 2025332 AMAQI
6th Jul 2025363 AMAQI
6th Jul 2025354 AMAQI
22°C15/29°C
6th Jul 2025385 AMAQI
6th Jul 2025446 AMAQI
6th Jul 2025467 AMAQI
6th Jul 2025488 AMAQI
6th Jul 2025479 AMAQI
6th Jul 20254510 AMAQI
6th Jul 20254511 AMAQI
6th Jul 20254512 PMAQI
6th Jul 2025461 PMAQI
6th Jul 2025472 PMAQI
6th Jul 2025443 PMAQI
6th Jul 2025424 PMAQI
6th Jul 2025365 PMAQI
6th Jul 2025366 PMAQI
6th Jul 2025387 PMAQI
6th Jul 2025438 PMAQI
6th Jul 2025449 PMAQI
6th Jul 20254610 PMAQI
6th Jul 20254711 PMAQI
7th Jul 20254612 AMAQI
7th Jul 2025441 AMAQI
7th Jul 2025422 AMAQI
7th Jul 2025433 AMAQI
7th Jul 2025494 AMAQI
27°C20/37°C
7th Jul 2025445 AMAQI
7th Jul 2025426 AMAQI
7th Jul 2025347 AMAQI
7th Jul 2025378 AMAQI
7th Jul 2025479 AMAQI
7th Jul 20255210 AMAQI
7th Jul 20255211 AMAQI
7th Jul 20255212 PMAQI
7th Jul 2025521 PMAQI
7th Jul 2025532 PMAQI
7th Jul 2025543 PMAQI
7th Jul 2025514 PMAQI
7th Jul 2025485 PMAQI
7th Jul 2025426 PMAQI
7th Jul 2025357 PMAQI
7th Jul 2025348 PMAQI
7th Jul 2025429 PMAQI
7th Jul 20254010 PMAQI
7th Jul 20253211 PMAQI
8th Jul 20253412 AMAQI
8th Jul 2025371 AMAQI
8th Jul 2025382 AMAQI
8th Jul 2025323 AMAQI
8th Jul 2025294 AMAQI
18°C15/23°C
8th Jul 2025265 AMAQI
8th Jul 2025286 AMAQI
8th Jul 2025287 AMAQI
8th Jul 2025308 AMAQI
8th Jul 2025299 AMAQI
8th Jul 20252810 AMAQI
8th Jul 20253011 AMAQI
8th Jul 20253212 PMAQI
8th Jul 2025341 PMAQI
8th Jul 2025342 PMAQI
8th Jul 2025403 PMAQI
8th Jul 2025384 PMAQI
8th Jul 2025365 PMAQI
8th Jul 2025366 PMAQI
8th Jul 2025347 PMAQI
8th Jul 2025328 PMAQI
8th Jul 2025329 PMAQI
8th Jul 20253210 PMAQI
8th Jul 20253011 PMAQI
9th Jul 20253212 AMAQI
9th Jul 2025331 AMAQI
9th Jul 2025342 AMAQI
9th Jul 2025383 AMAQI
9th Jul 2025414 AMAQI
22°C16/30°C
9th Jul 2025445 AMAQI
9th Jul 2025496 AMAQI
9th Jul 2025477 AMAQI
9th Jul 2025488 AMAQI
9th Jul 2025489 AMAQI
9th Jul 20254810 AMAQI
9th Jul 20255011 AMAQI
9th Jul 20254712 PMAQI
9th Jul 2025501 PMAQI
9th Jul 2025472 PMAQI
9th Jul 2025473 PMAQI
9th Jul 2025464 PMAQI
9th Jul 2025465 PMAQI
9th Jul 2025486 PMAQI
9th Jul 2025447 PMAQI
9th Jul 2025478 PMAQI
9th Jul 2025449 PMAQI
9th Jul 20254610 PMAQI
9th Jul 20254111 PMAQI
10th Jul 20254012 AMAQI
10th Jul 2025461 AMAQI
10th Jul 2025462 AMAQI
10th Jul 2025483 AMAQI
10th Jul 2025494 AMAQI
23°C16/31°C
10th Jul 2025515 AMAQI
10th Jul 2025506 AMAQI
10th Jul 2025507 AMAQI
10th Jul 2025508 AMAQI
10th Jul 2025469 AMAQI
10th Jul 20255010 AMAQI
10th Jul 20254911 AMAQI
10th Jul 20255012 PMAQI
10th Jul 2025481 PMAQI
10th Jul 2025482 PMAQI
10th Jul 2025463 PMAQI
10th Jul 2025464 PMAQI
10th Jul 2025475 PMAQI
10th Jul 2025486 PMAQI
10th Jul 2025497 PMAQI
10th Jul 2025518 PMAQI
10th Jul 2025499 PMAQI
10th Jul 20254710 PMAQI
10th Jul 20254811 PMAQI
11th Jul 20254412 AMAQI
11th Jul 2025451 AMAQI
11th Jul 2025482 AMAQI
11th Jul 2025513 AMAQI
11th Jul 2025504 AMAQI
24°C18/30°C
11th Jul 2025505 AMAQI
11th Jul 2025506 AMAQI
11th Jul 2025547 AMAQI
11th Jul 2025498 AMAQI
11th Jul 2025509 AMAQI
11th Jul 20255010 AMAQI
11th Jul 20255211 AMAQI
11th Jul 20255212 PMAQI
11th Jul 2025521 PMAQI
11th Jul 2025542 PMAQI
11th Jul 2025533 PMAQI
11th Jul 2025544 PMAQI
11th Jul 2025515 PMAQI
11th Jul 2025516 PMAQI
11th Jul 2025517 PMAQI
11th Jul 2025518 PMAQI
11th Jul 2025489 PMAQI
11th Jul 20254610 PMAQI
11th Jul 20254711 PMAQI
12th Jul 20255012 AMAQI
12th Jul 2025481 AMAQI
12th Jul 2025502 AMAQI
12th Jul 2025523 AMAQI
12th Jul 2025534 AMAQI
25°C18/32°C
12th Jul 2025525 AMAQI
12th Jul 2025506 AMAQI
12th Jul 2025527 AMAQI
12th Jul 2025518 AMAQI
12th Jul 2025549 AMAQI
12th Jul 20255310 AMAQI
12th Jul 20255411 AMAQI
12th Jul 20255512 PMAQI
12th Jul 2025541 PMAQI
12th Jul 2025542 PMAQI
12th Jul 2025543 PMAQI
12th Jul 2025544 PMAQI
12th Jul 2025535 PMAQI
12th Jul 2025526 PMAQI
12th Jul 2025527 PMAQI
12th Jul 2025538 PMAQI
12th Jul 2025529 PMAQI
12th Jul 20255310 PMAQI
12th Jul 20255211 PMAQI
13th Jul 20255212 AMAQI
13th Jul 2025521 AMAQI
13th Jul 2025522 AMAQI
13th Jul 2025453 AMAQI
13th Jul 2025424 AMAQI
26°C19/34°C
13th Jul 2025395 AMAQI
13th Jul 2025406 AMAQI
13th Jul 2025387 AMAQI
13th Jul 2025388 AMAQI
13th Jul 2025389 AMAQI
13th Jul 20253610 AMAQI
13th Jul 20253811 AMAQI
13th Jul 20253812 PMAQI
13th Jul 2025381 PMAQI
13th Jul 2025382 PMAQI
13th Jul 2025383 PMAQI
13th Jul 2025394 PMAQI
13th Jul 2025415 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025407 PMAQI
13th Jul 2025408 PMAQI
13th Jul 2025409 PMAQI
13th Jul 20254010 PMAQI
13th Jul 20254011 PMAQI
14th Jul 20253912 AMAQI
14th Jul 2025401 AMAQI
14th Jul 2025382 AMAQI
14th Jul 2025373 AMAQI
14th Jul 2025354 AMAQI
26°C23/31°C
14th Jul 2025345 AMAQI
14th Jul 2025366 AMAQI
14th Jul 2025347 AMAQI
14th Jul 2025348 AMAQI
14th Jul 2025369 AMAQI
14th Jul 20253510 AMAQI
14th Jul 20254011 AMAQI
14th Jul 20254812 PMAQI
14th Jul 2025441 PMAQI
14th Jul 2025482 PMAQI
14th Jul 2025413 PMAQI
14th Jul 2025394 PMAQI
14th Jul 2025385 PMAQI
14th Jul 2025386 PMAQI
14th Jul 2025387 PMAQI
14th Jul 2025398 PMAQI
14th Jul 2025409 PMAQI
14th Jul 20254110 PMAQI
14th Jul 20253611 PMAQI
15th Jul 20253712 AMAQI
15th Jul 2025381 AMAQI
15th Jul 2025362 AMAQI
15th Jul 2025323 AMAQI
15th Jul 2025274 AMAQI
26°C22/34°C
15th Jul 2025325 AMAQI
15th Jul 2025346 AMAQI
15th Jul 2025407 AMAQI
15th Jul 2025398 AMAQI
15th Jul 2025429 AMAQI
15th Jul 20254210 AMAQI
15th Jul 20254011 AMAQI
15th Jul 20254312 PMAQI
15th Jul 2025431 PMAQI
15th Jul 2025422 PMAQI
15th Jul 2025443 PMAQI
15th Jul 2025434 PMAQI
15th Jul 2025405 PMAQI
15th Jul 2025406 PMAQI
15th Jul 2025417 PMAQI
15th Jul 2025408 PMAQI
15th Jul 2025399 PMAQI
15th Jul 20253810 PMAQI
15th Jul 20253811 PMAQI
16th Jul 20253812 AMAQI
16th Jul 2025381 AMAQI
16th Jul 2025392 AMAQI
16th Jul 2025403 AMAQI
16th Jul 2025504 AMAQI
26°C19/34°C
16th Jul 2025525 AMAQI
16th Jul 2025506 AMAQI
16th Jul 2025517 AMAQI
16th Jul 2025548 AMAQI
16th Jul 2025529 AMAQI
16th Jul 20255210 AMAQI
16th Jul 20255011 AMAQI
16th Jul 20255012 PMAQI
16th Jul 2025511 PMAQI
16th Jul 2025492 PMAQI
16th Jul 2025513 PMAQI
16th Jul 2025494 PMAQI
16th Jul 2025495 PMAQI
16th Jul 2025506 PMAQI
16th Jul 2025497 PMAQI
16th Jul 2025508 PMAQI
16th Jul 2025499 PMAQI
16th Jul 20254810 PMAQI
16th Jul 20254811 PMAQI
17th Jul 20254812 AMAQI
17th Jul 2025501 AMAQI
17th Jul 2025482 AMAQI
17th Jul 2025523 AMAQI
17th Jul 2025594 AMAQI
28°C21/35°C
17th Jul 2025555 AMAQI
17th Jul 2025536 AMAQI
17th Jul 2025527 AMAQI
17th Jul 2025518 AMAQI
17th Jul 2025529 AMAQI
17th Jul 20255110 AMAQI
17th Jul 20255011 AMAQI
17th Jul 20254512 PMAQI
17th Jul 2025421 PMAQI
17th Jul 2025412 PMAQI
17th Jul 2025413 PMAQI
17th Jul 2025444 PMAQI
17th Jul 2025455 PMAQI
17th Jul 2025466 PMAQI
17th Jul 2025427 PMAQI
17th Jul 2025418 PMAQI
17th Jul 2025499 PMAQI
17th Jul 20254710 PMAQI
17th Jul 20253411 PMAQI
18th Jul 20253412 AMAQI
18th Jul 2025331 AMAQI
18th Jul 2025302 AMAQI
18th Jul 2025183 AMAQI
18th Jul 2025164 AMAQI
27°C18/31°C
18th Jul 2025145 AMAQI
18th Jul 2025146 AMAQI
18th Jul 2025157 AMAQI
18th Jul 2025158 AMAQI
18th Jul 2025179 AMAQI
18th Jul 20251810 AMAQI
18th Jul 20251811 AMAQI
18th Jul 20251912 PMAQI
18th Jul 2025191 PMAQI
18th Jul 2025212 PMAQI
18th Jul 2025213 PMAQI
18th Jul 2025224 PMAQI
18th Jul 2025235 PMAQI
18th Jul 2025236 PMAQI
18th Jul 2025247 PMAQI
18th Jul 2025268 PMAQI
18th Jul 2025229 PMAQI
18th Jul 20252210 PMAQI
18th Jul 20252911 PMAQI
19th Jul 20252912 AMAQI
19th Jul 2025281 AMAQI
19th Jul 2025282 AMAQI
19th Jul 2025303 AMAQI
19th Jul 2025314 AMAQI
20°C14/28°C
19th Jul 2025305 AMAQI
19th Jul 2025306 AMAQI
19th Jul 2025287 AMAQI
19th Jul 2025288 AMAQI
19th Jul 2025279 AMAQI
19th Jul 20252610 AMAQI
19th Jul 20252611 AMAQI
19th Jul 20252812 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025312 PMAQI
19th Jul 2025373 PMAQI
19th Jul 2025384 PMAQI
19th Jul 2025395 PMAQI
19th Jul 2025406 PMAQI
19th Jul 2025437 PMAQI
19th Jul 2025408 PMAQI
19th Jul 2025339 PMAQI
19th Jul 20253310 PMAQI
19th Jul 20254211 PMAQI
20th Jul 20254012 AMAQI
20th Jul 2025411 AMAQI
20th Jul 2025422 AMAQI
20th Jul 2025463 AMAQI
20th Jul 2025484 AMAQI
22°C15/30°C
20th Jul 2025495 AMAQI
20th Jul 2025496 AMAQI
20th Jul 2025437 AMAQI
20th Jul 2025418 AMAQI
20th Jul 2025399 AMAQI
20th Jul 20253710 AMAQI
20th Jul 20253411 AMAQI
20th Jul 20253312 PMAQI
20th Jul 2025321 PMAQI
20th Jul 2025322 PMAQI
20th Jul 2025323 PMAQI
20th Jul 2025334 PMAQI
20th Jul 2025345 PMAQI
20th Jul 2025356 PMAQI
20th Jul 2025357 PMAQI
20th Jul 2025368 PMAQI
20th Jul 2025389 PMAQI
20th Jul 20253910 PMAQI
20th Jul 20254411 PMAQI
21st Jul 20254112 AMAQI
21st Jul 2025381 AMAQI
21st Jul 2025392 AMAQI
21st Jul 2025523 AMAQI
21st Jul 2025534 AMAQI
21°C17/29°C
21st Jul 2025455 AMAQI
21st Jul 2025366 AMAQI
21st Jul 2025317 AMAQI
21st Jul 2025298 AMAQI
21st Jul 2025299 AMAQI
21st Jul 20252610 AMAQI
21st Jul 20252611 AMAQI
21st Jul 20252412 PMAQI
21st Jul 2025221 PMAQI
21st Jul 2025222 PMAQI
21st Jul 2025213 PMAQI
21st Jul 2025224 PMAQI
21st Jul 2025245 PMAQI
21st Jul 2025236 PMAQI
21st Jul 2025247 PMAQI
21st Jul 2025238 PMAQI
21st Jul 2025249 PMAQI
21st Jul 20252210 PMAQI
21st Jul 20252211 PMAQI
22nd Jul 20252212 AMAQI
22nd Jul 2025221 AMAQI
22nd Jul 2025202 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025174 AMAQI
19°C14/24°C
22nd Jul 2025185 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025188 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251810 AMAQI
22nd Jul 20251811 AMAQI
22nd Jul 20251812 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025193 PMAQI
22nd Jul 2025204 PMAQI
22nd Jul 2025205 PMAQI
22nd Jul 2025206 PMAQI
22nd Jul 2025207 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025189 PMAQI
22nd Jul 20251810 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025221 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025223 AMAQI
23rd Jul 2025244 AMAQI
19°C11/24°C
23rd Jul 2025245 AMAQI
23rd Jul 2025256 AMAQI
23rd Jul 2025257 AMAQI
23rd Jul 2025278 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252910 AMAQI
23rd Jul 20253011 AMAQI
23rd Jul 20253012 PMAQI
23rd Jul 2025281 PMAQI
23rd Jul 2025272 PMAQI
23rd Jul 2025273 PMAQI
23rd Jul 2025244 PMAQI
23rd Jul 2025245 PMAQI
23rd Jul 2025236 PMAQI
23rd Jul 2025227 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025262 AMAQI
24th Jul 2025273 AMAQI
24th Jul 2025274 AMAQI
21°C12/29°C
24th Jul 2025265 AMAQI
24th Jul 2025286 AMAQI
24th Jul 2025277 AMAQI
24th Jul 2025248 AMAQI
24th Jul 2025289 AMAQI
24th Jul 20253010 AMAQI
24th Jul 20253511 AMAQI
24th Jul 20254212 PMAQI
24th Jul 2025431 PMAQI
24th Jul 2025422 PMAQI
24th Jul 2025423 PMAQI
24th Jul 2025404 PMAQI
24th Jul 2025365 PMAQI
24th Jul 2025386 PMAQI
24th Jul 2025387 PMAQI
24th Jul 2025388 PMAQI
24th Jul 2025369 PMAQI
24th Jul 20253710 PMAQI
24th Jul 20253611 PMAQI
25th Jul 20253112 AMAQI
25th Jul 2025291 AMAQI
25th Jul 2025322 AMAQI
25th Jul 2025443 AMAQI
25th Jul 2025474 AMAQI
26°C17/35°C
25th Jul 2025405 AMAQI
25th Jul 2025356 AMAQI
25th Jul 2025377 AMAQI
25th Jul 2025358 AMAQI
25th Jul 2025349 AMAQI
25th Jul 20253210 AMAQI
25th Jul 20253211 AMAQI
25th Jul 20253212 PMAQI
25th Jul 2025341 PMAQI
25th Jul 2025402 PMAQI
25th Jul 2025463 PMAQI
25th Jul 2025444 PMAQI
25th Jul 2025385 PMAQI
25th Jul 2025386 PMAQI
25th Jul 2025367 PMAQI
25th Jul 2025378 PMAQI
25th Jul 2025439 PMAQI
25th Jul 20254010 PMAQI
25th Jul 20253611 PMAQI
26th Jul 20253612 AMAQI
26th Jul 2025361 AMAQI
26th Jul 2025362 AMAQI
26th Jul 2025523 AMAQI
26th Jul 2025444 AMAQI
26°C23/31°C
26th Jul 2025455 AMAQI
26th Jul 2025526 AMAQI
26th Jul 2025587 AMAQI
26th Jul 2025548 AMAQI
26th Jul 2025489 AMAQI
26th Jul 20255410 AMAQI
26th Jul 20255111 AMAQI
26th Jul 20255212 PMAQI
26th Jul 2025531 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025493 PMAQI
26th Jul 2025514 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 20255011 PMAQI
27th Jul 20255112 AMAQI
27th Jul 2025511 AMAQI
27th Jul 2025512 AMAQI
27th Jul 2025523 AMAQI
27th Jul 2025604 AMAQI
24°C15/33°C
27th Jul 2025565 AMAQI
27th Jul 2025566 AMAQI
27th Jul 2025557 AMAQI
27th Jul 2025548 AMAQI
27th Jul 2025589 AMAQI
27th Jul 20255610 AMAQI
27th Jul 20255711 AMAQI
27th Jul 20255512 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 2025587 PMAQI
27th Jul 2025588 PMAQI
27th Jul 2025559 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°C18/31°C
28th Jul 2025565 AMAQI
28th Jul 2025586 AMAQI
28th Jul 2025597 AMAQI
28th Jul 2025608 AMAQI
28th Jul 2025599 AMAQI
28th Jul 20256010 AMAQI
28th Jul 20256011 AMAQI
28th Jul 20255912 PMAQI
28th Jul 2025601 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 20256010 PMAQI
28th Jul 20255711 PMAQI
29th Jul 20255812 AMAQI
29th Jul 2025581 AMAQI
29th Jul 2025582 AMAQI
29th Jul 2025603 AMAQI
29th Jul 2025584 AMAQI
27°C20/33°C
29th Jul 2025585 AMAQI
29th Jul 2025576 AMAQI
29th Jul 2025567 AMAQI
29th Jul 2025578 AMAQI
29th Jul 2025569 AMAQI
29th Jul 20255410 AMAQI
29th Jul 20255211 AMAQI
29th Jul 20254812 PMAQI
29th Jul 2025461 PMAQI
29th Jul 2025442 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 20255810 PMAQI
29th Jul 20255911 PMAQI
30th Jul 20255812 AMAQI
30th Jul 2025581 AMAQI
30th Jul 2025582 AMAQI
30th Jul 2025573 AMAQI
30th Jul 2025594 AMAQI
25°C21/29°C
30th Jul 2025615 AMAQI
30th Jul 2025606 AMAQI
30th Jul 2025627 AMAQI
30th Jul 2025628 AMAQI
30th Jul 2025659 AMAQI
30th Jul 20256310 AMAQI
30th Jul 20256411 AMAQI
30th Jul 20256412 PMAQI
30th Jul 2025651 PMAQI
30th Jul 2025662 PMAQI
30th Jul 2025643 PMAQI
30th Jul 2025664 PMAQI
30th Jul 2025665 PMAQI
30th Jul 2025666 PMAQI
30th Jul 2025667 PMAQI
30th Jul 2025668 PMAQI
30th Jul 2025669 PMAQI
30th Jul 20256610 PMAQI
30th Jul 20256211 PMAQI
31st Jul 20256012 AMAQI
31st Jul 2025601 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025623 AMAQI
31st Jul 2025604 AMAQI
24°C19/29°C
31st Jul 2025665 AMAQI
31st Jul 2025626 AMAQI
31st Jul 2025567 AMAQI
31st Jul 2025498 AMAQI
31st Jul 2025469 AMAQI
31st Jul 20254010 AMAQI
31st Jul 20254011 AMAQI
31st Jul 20253312 PMAQI
31st Jul 2025351 PMAQI
31st Jul 2025342 PMAQI
31st Jul 2025363 PMAQI
31st Jul 2025364 PMAQI
31st Jul 2025335 PMAQI
31st Jul 2025336 PMAQI
31st Jul 2025347 PMAQI
31st Jul 2025348 PMAQI
31st Jul 2025429 PMAQI
31st Jul 20253810 PMAQI
31st Jul 20253211 PMAQI
1st Aug 20253312 AMAQI
1st Aug 2025351 AMAQI
1st Aug 2025322 AMAQI
1st Aug 2025343 AMAQI
1st Aug 2025314 AMAQI
19°C15/24°C
1st Aug 2025295 AMAQI
1st Aug 2025266 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025208 AMAQI
1st Aug 2025209 AMAQI
1st Aug 20252010 AMAQI
1st Aug 20251911 AMAQI
1st Aug 20251812 PMAQI
1st Aug 2025191 PMAQI
1st Aug 2025202 PMAQI
1st Aug 2025193 PMAQI
1st Aug 2025174 PMAQI
1st Aug 2025185 PMAQI
1st Aug 2025176 PMAQI
1st Aug 2025167 PMAQI
1st Aug 2025168 PMAQI
1st Aug 2025199 PMAQI
1st Aug 20252110 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252312 AMAQI
2nd Aug 2025271 AMAQI
2nd Aug 2025292 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025284 AMAQI
18°C10/26°C
2nd Aug 2025295 AMAQI
2nd Aug 2025286 AMAQI
2nd Aug 2025307 AMAQI
2nd Aug 2025258 AMAQI
2nd Aug 2025239 AMAQI
2nd Aug 20252210 AMAQI
2nd Aug 20252211 AMAQI
2nd Aug 20252212 PMAQI
2nd Aug 2025211 PMAQI
2nd Aug 2025252 PMAQI
2nd Aug 2025293 PMAQI
2nd Aug 2025374 PMAQI
2nd Aug 2025555 PMAQI
2nd Aug 2025606 PMAQI
2nd Aug 2025507 PMAQI
2nd Aug 2025288 PMAQI
2nd Aug 2025309 PMAQI
2nd Aug 20253210 PMAQI
2nd Aug 20253811 PMAQI
3rd Aug 20254312 AMAQI
3rd Aug 2025401 AMAQI
3rd Aug 2025452 AMAQI
3rd Aug 2025523 AMAQI
3rd Aug 2025444 AMAQI
21°C12/30°C
3rd Aug 2025435 AMAQI
3rd Aug 2025466 AMAQI
3rd Aug 2025457 AMAQI
3rd Aug 2025408 AMAQI
3rd Aug 2025369 AMAQI
3rd Aug 20254510 AMAQI
3rd Aug 20255711 AMAQI
3rd Aug 20256112 PMAQI
3rd Aug 2025681 PMAQI
3rd Aug 2025682 PMAQI
3rd Aug 2025673 PMAQI
3rd Aug 2025664 PMAQI
3rd Aug 2025665 PMAQI
3rd Aug 2025666 PMAQI
3rd Aug 2025637 PMAQI
3rd Aug 2025648 PMAQI
3rd Aug 2025549 PMAQI
3rd Aug 20256210 PMAQI
3rd Aug 20255811 PMAQI
4th Aug 20255612 AMAQI
4th Aug 2025571 AMAQI
4th Aug 2025562 AMAQI
4th Aug 2025563 AMAQI
4th Aug 2025504 AMAQI
24°C15/33°C
4th Aug 2025575 AMAQI
5 AM4th Aug 2025606 AMAQI
4th Aug 2025637 AMAQI
4th Aug 2025648 AMAQI
4th Aug 2025679 AMAQI
4th Aug 20257410 AMAQI
4th Aug 20257911 AMAQI
4th Aug 20258012 PMAQI
12 PM4th Aug 20251071 PMAQI
4th Aug 20251252 PMAQI
4th Aug 20251223 PMAQI
4th Aug 20251084 PMAQI
4th Aug 2025965 PMAQI
4th Aug 2025946 PMAQI
8 PM
12 AM
4 AM
--°C/°C
Day time
Avg. Highest Time
5 AM - 8 PM
42AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM
42AQI
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. 42), while the lowest AQI was between 5 AM to 8 PM (Avg. 42).
Night time
Avg. Highest Time
12 AM - 11 PM
41AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
41AQI
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. 41), while the lowest AQI was between 12 AM to 11 PM (Avg. 41).
2025 Days Vs Air Quality
South Shore Of Montreal, Longueuil, Quebec, Canada
2025
90%
193
10%
22
Total number of days with different AQI categories in last 216 days in 2025 (149 days remaining)
Good
193 DaysModerate
22 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 216 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
South Shore Of Montreal, Longueuil, 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
29AQI
29AQI
2nd January 2025
21AQI
21AQI
3rd January 2025
20AQI
20AQI
4th January 2025
20AQI
20AQI
5th January 2025
21AQI
21AQI
6th January 2025
23AQI
23AQI
7th January 2025
19AQI
19AQI
8th January 2025
19AQI
19AQI
9th January 2025
20AQI
20AQI
10th January 2025
21AQI
21AQI
11th January 2025
42AQI
42AQI
12th January 2025
33AQI
33AQI
13th January 2025
58AQI
58AQI
14th January 2025
29AQI
29AQI
15th January 2025
20AQI
20AQI
16th January 2025
28AQI
28AQI
17th January 2025
62AQI
62AQI
18th January 2025
44AQI
44AQI
19th January 2025
23AQI
23AQI
20th January 2025
23AQI
23AQI
21st January 2025
35AQI
35AQI
22nd January 2025
47AQI
47AQI
23rd January 2025
48AQI
48AQI
24th January 2025
43AQI
43AQI
25th January 2025
53AQI
53AQI
26th January 2025
37AQI
37AQI
27th January 2025
29AQI
29AQI
28th January 2025
26AQI
26AQI
29th January 2025
29AQI
29AQI
30th January 2025
23AQI
23AQI
31st January 2025
41AQI
41AQI
1st February 2025
23AQI
23AQI
2nd February 2025
37AQI
37AQI
3rd February 2025
55AQI
55AQI
4th February 2025
27AQI
27AQI
5th February 2025
22AQI
22AQI
6th February 2025
36AQI
36AQI
7th February 2025
35AQI
35AQI
8th February 2025
29AQI
29AQI
9th February 2025
34AQI
34AQI
10th February 2025
25AQI
25AQI
11th February 2025
27AQI
27AQI
12th February 2025
29AQI
29AQI
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
21AQI
21AQI
20th February 2025
25AQI
25AQI
21st February 2025
20AQI
20AQI
22nd February 2025
24AQI
24AQI
23rd February 2025
50AQI
50AQI
24th February 2025
48AQI
48AQI
25th February 2025
59AQI
59AQI
26th February 2025
47AQI
47AQI
27th February 2025
47AQI
47AQI
28th February 2025
30AQI
30AQI
1st March 2025
26AQI
26AQI
2nd March 2025
22AQI
22AQI
3rd March 2025
34AQI
34AQI
4th March 2025
36AQI
36AQI
5th March 2025
56AQI
56AQI
6th March 2025
20AQI
20AQI
7th March 2025
22AQI
22AQI
8th March 2025
25AQI
25AQI
9th March 2025
24AQI
24AQI
10th March 2025
30AQI
30AQI
11th March 2025
44AQI
44AQI
12th March 2025
23AQI
23AQI
13th March 2025
41AQI
41AQI
14th March 2025
73AQI
73AQI
15th March 2025
57AQI
57AQI
16th March 2025
52AQI
52AQI
17th March 2025
25AQI
25AQI
18th March 2025
31AQI
31AQI
19th March 2025
36AQI
36AQI
20th March 2025
25AQI
25AQI
21st March 2025
21AQI
21AQI
22nd March 2025
24AQI
24AQI
23rd March 2025
21AQI
21AQI
24th March 2025
24AQI
24AQI
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
24AQI
24AQI
31st March 2025
31AQI
31AQI
1st April 2025
18AQI
18AQI
2nd April 2025
19AQI
19AQI
3rd April 2025
20AQI
20AQI
4th April 2025
19AQI
19AQI
5th April 2025
20AQI
20AQI
6th April 2025
19AQI
19AQI
7th April 2025
20AQI
20AQI
8th April 2025
21AQI
21AQI
9th April 2025
18AQI
18AQI
10th April 2025
26AQI
26AQI
11th April 2025
33AQI
33AQI
12th April 2025
41AQI
41AQI
13th April 2025
26AQI
26AQI
14th April 2025
34AQI
34AQI
15th April 2025
29AQI
29AQI
16th April 2025
14AQI
14AQI
17th April 2025
16AQI
16AQI
18th April 2025
26AQI
26AQI
19th April 2025
43AQI
43AQI
20th April 2025
16AQI
16AQI
21st April 2025
22AQI
22AQI
22nd April 2025
22AQI
22AQI
23rd April 2025
15AQI
15AQI
24th April 2025
24AQI
24AQI
25th April 2025
23AQI
23AQI
26th April 2025
25AQI
25AQI
27th April 2025
14AQI
14AQI
28th April 2025
23AQI
23AQI
29th April 2025
31AQI
31AQI
30th April 2025
17AQI
17AQI
1st May 2025
18AQI
18AQI
2nd May 2025
26AQI
26AQI
3rd May 2025
16AQI
16AQI
4th May 2025
29AQI
29AQI
5th May 2025
22AQI
22AQI
6th May 2025
21AQI
21AQI
7th May 2025
17AQI
17AQI
8th May 2025
17AQI
17AQI
9th May 2025
17AQI
17AQI
10th May 2025
24AQI
24AQI
11th May 2025
16AQI
16AQI
12th May 2025
23AQI
23AQI
13th May 2025
36AQI
36AQI
14th May 2025
37AQI
37AQI
15th May 2025
30AQI
30AQI
16th May 2025
43AQI
43AQI
17th May 2025
41AQI
41AQI
18th May 2025
22AQI
22AQI
19th May 2025
14AQI
14AQI
20th May 2025
15AQI
15AQI
21st May 2025
19AQI
19AQI
22nd May 2025
16AQI
16AQI
23rd May 2025
15AQI
15AQI
24th May 2025
13AQI
13AQI
25th May 2025
16AQI
16AQI
26th May 2025
24AQI
24AQI
27th May 2025
26AQI
26AQI
28th May 2025
33AQI
33AQI
29th May 2025
34AQI
34AQI
30th May 2025
27AQI
27AQI
31st May 2025
34AQI
34AQI
1st June 2025
18AQI
18AQI
2nd June 2025
21AQI
21AQI
3rd June 2025
26AQI
26AQI
4th June 2025
41AQI
41AQI
5th June 2025
42AQI
42AQI
6th June 2025
53AQI
53AQI
7th June 2025
58AQI
58AQI
8th June 2025
58AQI
58AQI
9th June 2025
59AQI
59AQI
10th June 2025
44AQI
44AQI
11th June 2025
51AQI
51AQI
12th June 2025
56AQI
56AQI
13th June 2025
27AQI
27AQI
14th June 2025
29AQI
29AQI
15th June 2025
31AQI
31AQI
16th June 2025
47AQI
47AQI
17th June 2025
44AQI
44AQI
18th June 2025
24AQI
24AQI
19th June 2025
38AQI
38AQI
20th June 2025
22AQI
22AQI
21st June 2025
27AQI
27AQI
22nd June 2025
29AQI
29AQI
23rd June 2025
41AQI
41AQI
24th June 2025
51AQI
51AQI
25th June 2025
47AQI
47AQI
26th June 2025
29AQI
29AQI
27th June 2025
29AQI
29AQI
28th June 2025
27AQI
27AQI
29th June 2025
30AQI
30AQI
30th June 2025
31AQI
31AQI
1st July 2025
35AQI
35AQI
2nd July 2025
31AQI
31AQI
3rd July 2025
38AQI
38AQI
4th July 2025
23AQI
23AQI
5th July 2025
27AQI
27AQI
6th July 2025
41AQI
41AQI
7th July 2025
44AQI
44AQI
8th July 2025
32AQI
32AQI
9th July 2025
44AQI
44AQI
10th July 2025
48AQI
48AQI
11th July 2025
50AQI
50AQI
12th July 2025
52AQI
52AQI
13th July 2025
41AQI
41AQI
14th July 2025
38AQI
38AQI
15th July 2025
38AQI
38AQI
16th July 2025
48AQI
48AQI
17th July 2025
47AQI
47AQI
18th July 2025
22AQI
22AQI
19th July 2025
33AQI
33AQI
20th July 2025
39AQI
39AQI
21st July 2025
30AQI
30AQI
22nd July 2025
19AQI
19AQI
23rd July 2025
24AQI
24AQI
24th July 2025
33AQI
33AQI
25th July 2025
37AQI
37AQI
26th July 2025
49AQI
49AQI
27th July 2025
56AQI
56AQI
28th July 2025
58AQI
58AQI
29th July 2025
55AQI
55AQI
30th July 2025
63AQI
63AQI
31st July 2025
45AQI
45AQI
1st August 2025
23AQI
23AQI
2nd August 2025
32AQI
32AQI
3rd August 2025
52AQI
52AQI
32AQI
32AQI
31AQI
23AQI
24AQI
38AQI
40AQI
36AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202531AQI
28
3
26
2
27
4
30
31
23
7
26
5
2
1
193
22
Highest AQI recorded in
July40AQI
Lowest AQI recorded in
April23AQI
202430AQI
27
4
24
5
29
2
29
31
25
4
28
3
22
9
24
6
31
30
25
4
2
325
37
2
Highest AQI recorded in
December38AQI
Lowest AQI recorded in
April23AQI
202337AQI
29
2
21
7
30
1
28
2
30
1
19
7
4
19
11
1
25
6
21
9
26
5
26
3
20
11
294
65
5
Highest AQI recorded in
June52AQI
Lowest AQI recorded in
October29AQI
202233AQI
18
11
1
17
4
27
4
17
30
1
29
1
20
2
1
29
27
4
28
2
26
5
269
34
1
Highest AQI recorded in
January50AQI
Lowest AQI recorded in
August21AQI
202133AQI
23
7
20
8
29
2
28
1
28
3
29
1
25
4
2
24
7
30
30
1
28
2
25
4
319
40
2
Highest AQI recorded in
February41AQI
Lowest AQI recorded in
September21AQI
202029AQI
6
30
1
31
30
31
24
6
27
4
179
11
Highest AQI recorded in
November36AQI
Lowest AQI recorded in
September23AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
37AQILeast Polluted Year Recorded
2020(Avg.)
29AQISouth Shore Of Montreal's annual 2025 AQI (31) shows an average percentage change of -2.5% (improved AQI) compared to previous years: 2020 (29), 2021 (33), 2022 (33), 2023 (37), 2024 (30).
