Cornwall, Ontario, Canada Historical Air Quality Analysis
Dive into detailed Air Quality Insights with historical data, monthly patterns, and yearly trends at your fingertips!
Good
050
Moderate
100
Poor
150
Unhealthy
200
Severe
300
Hazardous
301+
August Air Quality Analysis
Cornwall, Ontario, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
15th Aug 2024
76AQILowest AQI recorded on
9th Aug 2024
12AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 3rd highest AQI at 27 of Good air quality, showing improvement over 2024 and 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 1st Aug - 2nd Aug 2025
Cornwall, Ontario, Canada
AQI
Day
Night
.
5 AM1st Aug 2025
8 PM
4 AM2nd Aug 2025
Day time
Avg. Highest Time
5AM1st Aug
37AQI
Avg. Lowest Time
8PM1st Aug
30AQI
Night time
Avg. Highest Time
3AM2nd Aug
40AQI
Avg. Lowest Time
9PM1st Aug
32AQI
In the last 24 hours,
Cornwall's AQI reached its highest point of 40 at 3 AM during the Night, while the lowest point, 30, was recorded at 8 PM during the Day between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Cornwall, Ontario, Canada
JulAug
03rd - 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 - 31st31st - 01st01st - 02nd02nd
Day
Night
3rd Jul 2025395 AMAQI
3rd Jul 2025526 AMAQI
3rd Jul 2025527 AMAQI
3rd Jul 2025518 AMAQI
3rd Jul 2025509 AMAQI
3rd Jul 20255110 AMAQI
3rd Jul 20255211 AMAQI
3rd Jul 20255112 PMAQI
3rd Jul 2025491 PMAQI
3rd Jul 2025522 PMAQI
3rd Jul 2025503 PMAQI
3rd Jul 2025514 PMAQI
3rd Jul 2025495 PMAQI
3rd Jul 2025496 PMAQI
3rd Jul 2025477 PMAQI
3rd Jul 2025468 PMAQI
3rd Jul 2025459 PMAQI
3rd Jul 20254410 PMAQI
3rd Jul 20254511 PMAQI
4th Jul 20254212 AMAQI
4th Jul 2025401 AMAQI
4th Jul 2025342 AMAQI
4th Jul 2025343 AMAQI
4th Jul 2025364 AMAQI
--°C/°C
4th Jul 2025375 AMAQI
4th Jul 2025366 AMAQI
4th Jul 2025367 AMAQI
4th Jul 2025368 AMAQI
4th Jul 2025419 AMAQI
4th Jul 20254810 AMAQI
4th Jul 20253611 AMAQI
4th Jul 20253212 PMAQI
4th Jul 2025291 PMAQI
4th Jul 2025302 PMAQI
4th Jul 2025303 PMAQI
4th Jul 2025304 PMAQI
4th Jul 2025325 PMAQI
4th Jul 2025316 PMAQI
4th Jul 2025327 PMAQI
4th Jul 2025338 PMAQI
4th Jul 2025339 PMAQI
4th Jul 20253310 PMAQI
4th Jul 20253311 PMAQI
5th Jul 20253312 AMAQI
5th Jul 2025281 AMAQI
5th Jul 2025302 AMAQI
5th Jul 2025283 AMAQI
5th Jul 2025324 AMAQI
19°C11/26°C
5th Jul 2025315 AMAQI
5th Jul 2025306 AMAQI
5th Jul 2025287 AMAQI
5th Jul 2025298 AMAQI
5th Jul 2025309 AMAQI
5th Jul 20252810 AMAQI
5th Jul 20252811 AMAQI
5th Jul 20252812 PMAQI
5th Jul 2025261 PMAQI
5th Jul 2025272 PMAQI
5th Jul 2025283 PMAQI
5th Jul 2025294 PMAQI
5th Jul 2025295 PMAQI
5th Jul 2025316 PMAQI
5th Jul 2025307 PMAQI
5th Jul 2025308 PMAQI
5th Jul 2025339 PMAQI
5th Jul 20253210 PMAQI
5th Jul 20253811 PMAQI
6th Jul 20254012 AMAQI
6th Jul 2025441 AMAQI
6th Jul 2025492 AMAQI
6th Jul 2025493 AMAQI
6th Jul 2025514 AMAQI
22°C15/29°C
6th Jul 2025505 AMAQI
6th Jul 2025456 AMAQI
6th Jul 2025467 AMAQI
6th Jul 2025478 AMAQI
6th Jul 2025499 AMAQI
6th Jul 20255110 AMAQI
6th Jul 20255011 AMAQI
6th Jul 20255012 PMAQI
6th Jul 2025521 PMAQI
6th Jul 2025542 PMAQI
6th Jul 2025543 PMAQI
6th Jul 2025544 PMAQI
6th Jul 2025525 PMAQI
6th Jul 2025526 PMAQI
6th Jul 2025507 PMAQI
6th Jul 2025468 PMAQI
6th Jul 2025499 PMAQI
6th Jul 20255010 PMAQI
6th Jul 20254811 PMAQI
7th Jul 20255112 AMAQI
7th Jul 2025501 AMAQI
7th Jul 2025522 AMAQI
7th Jul 2025503 AMAQI
7th Jul 2025504 AMAQI
28°C22/35°C
7th Jul 2025495 AMAQI
7th Jul 2025486 AMAQI
7th Jul 2025487 AMAQI
7th Jul 2025508 AMAQI
7th Jul 2025519 AMAQI
7th Jul 20255010 AMAQI
7th Jul 20254711 AMAQI
7th Jul 20254712 PMAQI
7th Jul 2025471 PMAQI
7th Jul 2025462 PMAQI
7th Jul 2025463 PMAQI
7th Jul 2025464 PMAQI
7th Jul 2025475 PMAQI
7th Jul 2025486 PMAQI
7th Jul 2025507 PMAQI
7th Jul 2025468 PMAQI
7th Jul 2025479 PMAQI
7th Jul 20254510 PMAQI
7th Jul 20253711 PMAQI
8th Jul 20253712 AMAQI
8th Jul 2025341 AMAQI
8th Jul 2025252 AMAQI
8th Jul 2025253 AMAQI
8th Jul 2025224 AMAQI
21°C16/29°C
8th Jul 2025245 AMAQI
8th Jul 2025226 AMAQI
8th Jul 2025227 AMAQI
8th Jul 2025268 AMAQI
8th Jul 2025279 AMAQI
8th Jul 20252710 AMAQI
8th Jul 20252811 AMAQI
8th Jul 20252812 PMAQI
8th Jul 2025281 PMAQI
8th Jul 2025292 PMAQI
8th Jul 2025293 PMAQI
8th Jul 2025304 PMAQI
8th Jul 2025325 PMAQI
8th Jul 2025306 PMAQI
8th Jul 2025317 PMAQI
8th Jul 2025318 PMAQI
8th Jul 2025289 PMAQI
8th Jul 20252910 PMAQI
8th Jul 20253111 PMAQI
9th Jul 20253012 AMAQI
9th Jul 2025281 AMAQI
9th Jul 2025292 AMAQI
9th Jul 2025283 AMAQI
9th Jul 2025274 AMAQI
20°C16/25°C
9th Jul 2025275 AMAQI
9th Jul 2025286 AMAQI
9th Jul 2025287 AMAQI
9th Jul 2025268 AMAQI
9th Jul 2025269 AMAQI
9th Jul 20252910 AMAQI
9th Jul 20252811 AMAQI
9th Jul 20252812 PMAQI
9th Jul 2025281 PMAQI
9th Jul 2025302 PMAQI
9th Jul 2025283 PMAQI
9th Jul 2025284 PMAQI
9th Jul 2025305 PMAQI
9th Jul 2025306 PMAQI
9th Jul 2025297 PMAQI
9th Jul 2025308 PMAQI
9th Jul 2025309 PMAQI
9th Jul 20253010 PMAQI
9th Jul 20253211 PMAQI
10th Jul 20253112 AMAQI
10th Jul 2025321 AMAQI
10th Jul 2025322 AMAQI
10th Jul 2025313 AMAQI
10th Jul 2025314 AMAQI
22°C15/29°C
10th Jul 2025315 AMAQI
10th Jul 2025306 AMAQI
10th Jul 2025317 AMAQI
10th Jul 2025318 AMAQI
10th Jul 2025319 AMAQI
10th Jul 20253210 AMAQI
10th Jul 20253311 AMAQI
10th Jul 20253412 PMAQI
10th Jul 2025371 PMAQI
10th Jul 2025392 PMAQI
10th Jul 2025413 PMAQI
10th Jul 2025424 PMAQI
10th Jul 2025365 PMAQI
10th Jul 2025366 PMAQI
10th Jul 2025387 PMAQI
10th Jul 2025388 PMAQI
10th Jul 2025369 PMAQI
10th Jul 20253610 PMAQI
10th Jul 20253711 PMAQI
11th Jul 20253712 AMAQI
11th Jul 2025371 AMAQI
11th Jul 2025422 AMAQI
11th Jul 2025413 AMAQI
11th Jul 2025394 AMAQI
24°C17/31°C
11th Jul 2025395 AMAQI
11th Jul 2025366 AMAQI
11th Jul 2025367 AMAQI
11th Jul 2025368 AMAQI
11th Jul 2025419 AMAQI
11th Jul 20254410 AMAQI
11th Jul 20254411 AMAQI
11th Jul 20254412 PMAQI
11th Jul 2025441 PMAQI
11th Jul 2025452 PMAQI
11th Jul 2025443 PMAQI
11th Jul 2025444 PMAQI
11th Jul 2025455 PMAQI
11th Jul 2025446 PMAQI
11th Jul 2025407 PMAQI
11th Jul 2025438 PMAQI
11th Jul 2025439 PMAQI
11th Jul 20254210 PMAQI
11th Jul 20254411 PMAQI
12th Jul 20254212 AMAQI
12th Jul 2025401 AMAQI
12th Jul 2025442 AMAQI
12th Jul 2025483 AMAQI
12th Jul 2025474 AMAQI
25°C17/33°C
12th Jul 2025465 AMAQI
12th Jul 2025456 AMAQI
12th Jul 2025467 AMAQI
12th Jul 2025488 AMAQI
12th Jul 2025499 AMAQI
12th Jul 20254810 AMAQI
12th Jul 20254811 AMAQI
12th Jul 20254712 PMAQI
12th Jul 2025471 PMAQI
12th Jul 2025462 PMAQI
12th Jul 2025463 PMAQI
12th Jul 2025464 PMAQI
12th Jul 2025475 PMAQI
12th Jul 2025476 PMAQI
12th Jul 2025477 PMAQI
12th Jul 2025478 PMAQI
12th Jul 2025459 PMAQI
12th Jul 20254410 PMAQI
12th Jul 20254211 PMAQI
13th Jul 20254412 AMAQI
13th Jul 2025431 AMAQI
13th Jul 2025372 AMAQI
13th Jul 2025333 AMAQI
13th Jul 2025304 AMAQI
25°C18/34°C
13th Jul 2025305 AMAQI
13th Jul 2025316 AMAQI
13th Jul 2025287 AMAQI
13th Jul 2025298 AMAQI
13th Jul 2025329 AMAQI
13th Jul 20253110 AMAQI
13th Jul 20253211 AMAQI
13th Jul 20253312 PMAQI
13th Jul 2025331 PMAQI
13th Jul 2025332 PMAQI
13th Jul 2025333 PMAQI
13th Jul 2025364 PMAQI
13th Jul 2025335 PMAQI
13th Jul 2025346 PMAQI
13th Jul 2025327 PMAQI
13th Jul 2025318 PMAQI
13th Jul 2025359 PMAQI
13th Jul 20253510 PMAQI
13th Jul 20253211 PMAQI
14th Jul 20253212 AMAQI
14th Jul 2025301 AMAQI
14th Jul 2025242 AMAQI
14th Jul 2025243 AMAQI
14th Jul 2025244 AMAQI
26°C23/29°C
14th Jul 2025255 AMAQI
14th Jul 2025266 AMAQI
14th Jul 2025257 AMAQI
14th Jul 2025288 AMAQI
14th Jul 2025299 AMAQI
14th Jul 20253310 AMAQI
14th Jul 20254211 AMAQI
14th Jul 20254212 PMAQI
14th Jul 2025421 PMAQI
14th Jul 2025452 PMAQI
14th Jul 2025433 PMAQI
14th Jul 2025374 PMAQI
14th Jul 2025335 PMAQI
14th Jul 2025336 PMAQI
14th Jul 2025327 PMAQI
14th Jul 2025328 PMAQI
14th Jul 2025369 PMAQI
14th Jul 20253810 PMAQI
14th Jul 20253311 PMAQI
15th Jul 20253312 AMAQI
15th Jul 2025321 AMAQI
15th Jul 2025322 AMAQI
15th Jul 2025253 AMAQI
15th Jul 2025254 AMAQI
26°C21/31°C
15th Jul 2025275 AMAQI
15th Jul 2025286 AMAQI
15th Jul 2025307 AMAQI
15th Jul 2025348 AMAQI
15th Jul 2025459 AMAQI
15th Jul 20254510 AMAQI
15th Jul 20255111 AMAQI
15th Jul 20255412 PMAQI
15th Jul 2025451 PMAQI
15th Jul 2025472 PMAQI
15th Jul 2025473 PMAQI
15th Jul 2025474 PMAQI
15th Jul 2025455 PMAQI
15th Jul 2025446 PMAQI
15th Jul 2025427 PMAQI
15th Jul 2025428 PMAQI
15th Jul 2025429 PMAQI
15th Jul 20254110 PMAQI
15th Jul 20254111 PMAQI
16th Jul 20254112 AMAQI
16th Jul 2025411 AMAQI
16th Jul 2025422 AMAQI
16th Jul 2025443 AMAQI
16th Jul 2025474 AMAQI
26°C18/32°C
16th Jul 2025475 AMAQI
16th Jul 2025466 AMAQI
16th Jul 2025507 AMAQI
16th Jul 2025528 AMAQI
16th Jul 2025569 AMAQI
16th Jul 20255310 AMAQI
16th Jul 20255111 AMAQI
16th Jul 20255312 PMAQI
16th Jul 2025521 PMAQI
16th Jul 2025552 PMAQI
16th Jul 2025553 PMAQI
16th Jul 2025544 PMAQI
16th Jul 2025515 PMAQI
16th Jul 2025526 PMAQI
16th Jul 2025537 PMAQI
16th Jul 2025548 PMAQI
16th Jul 2025529 PMAQI
16th Jul 20255210 PMAQI
16th Jul 20255111 PMAQI
17th Jul 20255112 AMAQI
17th Jul 2025491 AMAQI
17th Jul 2025412 AMAQI
17th Jul 2025403 AMAQI
17th Jul 2025374 AMAQI
28°C21/35°C
17th Jul 2025355 AMAQI
17th Jul 2025336 AMAQI
17th Jul 2025367 AMAQI
17th Jul 2025378 AMAQI
17th Jul 2025399 AMAQI
17th Jul 20253710 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253512 PMAQI
17th Jul 2025371 PMAQI
17th Jul 2025352 PMAQI
17th Jul 2025353 PMAQI
17th Jul 2025354 PMAQI
17th Jul 2025395 PMAQI
17th Jul 2025396 PMAQI
17th Jul 2025387 PMAQI
17th Jul 2025398 PMAQI
17th Jul 2025389 PMAQI
17th Jul 20253610 PMAQI
17th Jul 20253111 PMAQI
18th Jul 20253112 AMAQI
18th Jul 2025271 AMAQI
18th Jul 2025182 AMAQI
18th Jul 2025183 AMAQI
18th Jul 2025184 AMAQI
25°C17/31°C
18th Jul 2025185 AMAQI
18th Jul 2025176 AMAQI
18th Jul 2025187 AMAQI
18th Jul 2025168 AMAQI
18th Jul 2025169 AMAQI
18th Jul 20251610 AMAQI
18th Jul 20251611 AMAQI
18th Jul 20251612 PMAQI
18th Jul 2025171 PMAQI
18th Jul 2025182 PMAQI
18th Jul 2025183 PMAQI
18th Jul 2025194 PMAQI
18th Jul 2025195 PMAQI
18th Jul 2025196 PMAQI
18th Jul 2025207 PMAQI
18th Jul 2025208 PMAQI
18th Jul 2025199 PMAQI
18th Jul 20251910 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025231 AMAQI
19th Jul 2025222 AMAQI
19th Jul 2025223 AMAQI
19th Jul 2025224 AMAQI
20°C13/27°C
19th Jul 2025225 AMAQI
19th Jul 2025226 AMAQI
19th Jul 2025227 AMAQI
19th Jul 2025228 AMAQI
19th Jul 2025229 AMAQI
19th Jul 20252210 AMAQI
19th Jul 20252211 AMAQI
19th Jul 20252212 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025243 PMAQI
19th Jul 2025244 PMAQI
19th Jul 2025255 PMAQI
19th Jul 2025256 PMAQI
19th Jul 2025267 PMAQI
19th Jul 2025268 PMAQI
19th Jul 2025269 PMAQI
19th Jul 20252610 PMAQI
19th Jul 20252911 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025301 AMAQI
20th Jul 2025322 AMAQI
20th Jul 2025333 AMAQI
20th Jul 2025324 AMAQI
21°C14/29°C
20th Jul 2025305 AMAQI
20th Jul 2025306 AMAQI
20th Jul 2025297 AMAQI
20th Jul 2025298 AMAQI
20th Jul 2025329 AMAQI
20th Jul 20253210 AMAQI
20th Jul 20253311 AMAQI
20th Jul 20253112 PMAQI
20th Jul 2025311 PMAQI
20th Jul 2025312 PMAQI
20th Jul 2025313 PMAQI
20th Jul 2025314 PMAQI
20th Jul 2025325 PMAQI
20th Jul 2025326 PMAQI
20th Jul 2025307 PMAQI
20th Jul 2025308 PMAQI
20th Jul 2025339 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20253711 PMAQI
21st Jul 20253212 AMAQI
21st Jul 2025311 AMAQI
21st Jul 2025342 AMAQI
21st Jul 2025423 AMAQI
21st Jul 2025434 AMAQI
21°C17/27°C
21st Jul 2025425 AMAQI
21st Jul 2025336 AMAQI
21st Jul 2025287 AMAQI
21st Jul 2025268 AMAQI
21st Jul 2025299 AMAQI
21st Jul 20253210 AMAQI
21st Jul 20253411 AMAQI
21st Jul 20253512 PMAQI
21st Jul 2025351 PMAQI
21st Jul 2025332 PMAQI
21st Jul 2025333 PMAQI
21st Jul 2025344 PMAQI
21st Jul 2025355 PMAQI
21st Jul 2025346 PMAQI
21st Jul 2025307 PMAQI
21st Jul 2025288 PMAQI
21st Jul 2025299 PMAQI
21st Jul 20252810 PMAQI
21st Jul 20252711 PMAQI
22nd Jul 20252612 AMAQI
22nd Jul 2025241 AMAQI
22nd Jul 2025202 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025174 AMAQI
18°C13/22°C
22nd Jul 2025185 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025177 AMAQI
22nd Jul 2025178 AMAQI
22nd Jul 2025199 AMAQI
22nd Jul 20252010 AMAQI
22nd Jul 20251911 AMAQI
22nd Jul 20251812 PMAQI
22nd Jul 2025181 PMAQI
22nd Jul 2025182 PMAQI
22nd Jul 2025193 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025196 PMAQI
22nd Jul 2025197 PMAQI
22nd Jul 2025198 PMAQI
22nd Jul 2025199 PMAQI
22nd Jul 20251910 PMAQI
22nd Jul 20252011 PMAQI
23rd Jul 20252012 AMAQI
23rd Jul 2025241 AMAQI
23rd Jul 2025282 AMAQI
23rd Jul 2025243 AMAQI
23rd Jul 2025224 AMAQI
17°C6/24°C
23rd Jul 2025215 AMAQI
23rd Jul 2025226 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025218 AMAQI
23rd Jul 2025249 AMAQI
23rd Jul 20252510 AMAQI
23rd Jul 20252611 AMAQI
23rd Jul 20252412 PMAQI
23rd Jul 2025241 PMAQI
23rd Jul 2025232 PMAQI
23rd Jul 2025233 PMAQI
23rd Jul 2025234 PMAQI
23rd Jul 2025255 PMAQI
23rd Jul 2025256 PMAQI
23rd Jul 2025237 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025259 PMAQI
23rd Jul 20252510 PMAQI
23rd Jul 20252611 PMAQI
24th Jul 20252512 AMAQI
24th Jul 2025231 AMAQI
24th Jul 2025222 AMAQI
24th Jul 2025223 AMAQI
24th Jul 2025204 AMAQI
21°C12/28°C
24th Jul 2025215 AMAQI
24th Jul 2025246 AMAQI
24th Jul 2025267 AMAQI
24th Jul 2025308 AMAQI
24th Jul 2025359 AMAQI
24th Jul 20253810 AMAQI
24th Jul 20253511 AMAQI
24th Jul 20253612 PMAQI
24th Jul 2025371 PMAQI
24th Jul 2025392 PMAQI
24th Jul 2025373 PMAQI
24th Jul 2025374 PMAQI
24th Jul 2025365 PMAQI
24th Jul 2025356 PMAQI
24th Jul 2025337 PMAQI
24th Jul 2025338 PMAQI
24th Jul 2025379 PMAQI
24th Jul 20253510 PMAQI
24th Jul 20253611 PMAQI
25th Jul 20253612 AMAQI
25th Jul 2025411 AMAQI
25th Jul 2025472 AMAQI
25th Jul 2025493 AMAQI
25th Jul 2025524 AMAQI
27°C18/34°C
25th Jul 2025505 AMAQI
25th Jul 2025486 AMAQI
25th Jul 2025457 AMAQI
25th Jul 2025448 AMAQI
25th Jul 2025429 AMAQI
25th Jul 20254210 AMAQI
25th Jul 20254111 AMAQI
25th Jul 20253812 PMAQI
25th Jul 2025401 PMAQI
25th Jul 2025382 PMAQI
25th Jul 2025383 PMAQI
25th Jul 2025394 PMAQI
25th Jul 2025455 PMAQI
25th Jul 2025446 PMAQI
25th Jul 2025457 PMAQI
25th Jul 2025468 PMAQI
25th Jul 2025459 PMAQI
25th Jul 20254310 PMAQI
25th Jul 20254111 PMAQI
26th Jul 20254112 AMAQI
26th Jul 2025391 AMAQI
26th Jul 2025462 AMAQI
26th Jul 2025663 AMAQI
26th Jul 2025674 AMAQI
25°C21/29°C
26th Jul 2025635 AMAQI
26th Jul 2025596 AMAQI
26th Jul 2025647 AMAQI
26th Jul 2025778 AMAQI
26th Jul 2025829 AMAQI
26th Jul 20257310 AMAQI
26th Jul 20257511 AMAQI
26th Jul 20257112 PMAQI
26th Jul 2025711 PMAQI
26th Jul 2025702 PMAQI
26th Jul 2025743 PMAQI
26th Jul 2025764 PMAQI
26th Jul 2025725 PMAQI
26th Jul 2025716 PMAQI
26th Jul 2025717 PMAQI
26th Jul 2025708 PMAQI
26th Jul 2025689 PMAQI
26th Jul 20256610 PMAQI
26th Jul 20256811 PMAQI
27th Jul 20256712 AMAQI
27th Jul 2025761 AMAQI
27th Jul 2025802 AMAQI
27th Jul 2025873 AMAQI
27th Jul 2025774 AMAQI
24°C13/32°C
27th Jul 2025745 AMAQI
27th Jul 2025756 AMAQI
27th Jul 2025817 AMAQI
27th Jul 2025808 AMAQI
27th Jul 2025749 AMAQI
27th Jul 20257310 AMAQI
27th Jul 20257311 AMAQI
27th Jul 20257012 PMAQI
27th Jul 2025681 PMAQI
27th Jul 2025692 PMAQI
27th Jul 2025663 PMAQI
27th Jul 2025664 PMAQI
27th Jul 2025705 PMAQI
27th Jul 2025686 PMAQI
27th Jul 2025717 PMAQI
27th Jul 2025688 PMAQI
27th Jul 2025669 PMAQI
27th Jul 20256710 PMAQI
27th Jul 20256411 PMAQI
28th Jul 20256512 AMAQI
28th Jul 2025581 AMAQI
28th Jul 2025542 AMAQI
28th Jul 2025493 AMAQI
28th Jul 2025504 AMAQI
26°C21/32°C
28th Jul 2025555 AMAQI
28th Jul 2025576 AMAQI
28th Jul 2025587 AMAQI
28th Jul 2025588 AMAQI
28th Jul 2025589 AMAQI
28th Jul 20255810 AMAQI
28th Jul 20255911 AMAQI
28th Jul 20255812 PMAQI
28th Jul 2025581 PMAQI
28th Jul 2025582 PMAQI
28th Jul 2025583 PMAQI
28th Jul 2025584 PMAQI
28th Jul 2025585 PMAQI
28th Jul 2025586 PMAQI
28th Jul 2025587 PMAQI
28th Jul 2025578 PMAQI
28th Jul 2025589 PMAQI
28th Jul 20255810 PMAQI
28th Jul 20255811 PMAQI
29th Jul 20255812 AMAQI
29th Jul 2025591 AMAQI
29th Jul 2025592 AMAQI
29th Jul 2025603 AMAQI
29th Jul 2025574 AMAQI
26°C19/34°C
29th Jul 2025575 AMAQI
29th Jul 2025576 AMAQI
29th Jul 2025577 AMAQI
29th Jul 2025568 AMAQI
29th Jul 2025549 AMAQI
29th Jul 20255110 AMAQI
29th Jul 20254711 AMAQI
29th Jul 20254512 PMAQI
29th Jul 2025451 PMAQI
29th Jul 2025462 PMAQI
29th Jul 2025473 PMAQI
29th Jul 2025494 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025526 PMAQI
29th Jul 2025537 PMAQI
29th Jul 2025558 PMAQI
29th Jul 2025559 PMAQI
29th Jul 20255510 PMAQI
29th Jul 20255711 PMAQI
30th Jul 20255712 AMAQI
30th Jul 2025541 AMAQI
30th Jul 2025562 AMAQI
30th Jul 2025583 AMAQI
30th Jul 2025604 AMAQI
25°C20/31°C
30th Jul 2025605 AMAQI
30th Jul 2025586 AMAQI
30th Jul 2025587 AMAQI
30th Jul 2025568 AMAQI
30th Jul 2025579 AMAQI
30th Jul 20255610 AMAQI
30th Jul 20255811 AMAQI
30th Jul 20255512 PMAQI
30th Jul 2025571 PMAQI
30th Jul 2025612 PMAQI
30th Jul 2025603 PMAQI
30th Jul 2025624 PMAQI
30th Jul 2025605 PMAQI
30th Jul 2025596 PMAQI
30th Jul 2025607 PMAQI
30th Jul 2025608 PMAQI
30th Jul 2025609 PMAQI
30th Jul 20256010 PMAQI
30th Jul 20255611 PMAQI
31st Jul 20255612 AMAQI
31st Jul 2025561 AMAQI
31st Jul 2025572 AMAQI
31st Jul 2025593 AMAQI
31st Jul 2025594 AMAQI
23°C17/31°C
31st Jul 2025655 AMAQI
31st Jul 2025626 AMAQI
31st Jul 2025607 AMAQI
31st Jul 2025608 AMAQI
31st Jul 2025669 AMAQI
31st Jul 20256810 AMAQI
31st Jul 20256911 AMAQI
31st Jul 20256612 PMAQI
31st Jul 2025631 PMAQI
31st Jul 2025602 PMAQI
31st Jul 2025553 PMAQI
31st Jul 2025484 PMAQI
31st Jul 2025475 PMAQI
31st Jul 2025476 PMAQI
31st Jul 2025457 PMAQI
31st Jul 2025408 PMAQI
31st Jul 2025589 PMAQI
31st Jul 20254810 PMAQI
31st Jul 20254211 PMAQI
1st Aug 20254112 AMAQI
1st Aug 2025401 AMAQI
1st Aug 2025482 AMAQI
1st Aug 2025483 AMAQI
1st Aug 2025424 AMAQI
19°C15/24°C
1st Aug 2025375 AMAQI
1st Aug 2025356 AMAQI
1st Aug 2025347 AMAQI
1st Aug 2025348 AMAQI
1st Aug 2025349 AMAQI
1st Aug 20253410 AMAQI
1st Aug 20253211 AMAQI
1st Aug 20253412 PMAQI
1st Aug 2025321 PMAQI
1st Aug 2025322 PMAQI
1st Aug 2025333 PMAQI
1st Aug 2025314 PMAQI
1st Aug 2025355 PMAQI
1st Aug 2025326 PMAQI
1st Aug 2025327 PMAQI
1st Aug 2025308 PMAQI
1st Aug 2025329 PMAQI
1st Aug 20253310 PMAQI
1st Aug 20253311 PMAQI
2nd Aug 20253612 AMAQI
2nd Aug 2025371 AMAQI
2nd Aug 2025392 AMAQI
2nd Aug 2025403 AMAQI
2nd Aug 2025354 AMAQI
18°C10/25°C
2nd Aug 2025325 AMAQI
5 AM2nd Aug 2025296 AMAQI
2nd Aug 2025297 AMAQI
2nd Aug 2025278 AMAQI
2nd Aug 2025279 AMAQI
2nd Aug 20252510 AMAQI
2nd Aug 20252311 AMAQI
2nd Aug 20252312 PMAQI
12 PM2nd Aug 2025271 PMAQI
2nd Aug 2025372 PMAQI
2nd Aug 2025443 PMAQI
2nd Aug 2025444 PMAQI
2nd Aug 2025555 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025437 PMAQI
2nd Aug 2025338 PMAQI
8 PM2nd Aug 2025339 PMAQI
2nd Aug 20253310 PMAQI
12 AM
4 AM
19°C8/29°C
Day time
Avg. Highest Time
5 AM - 8 PM
40AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 AM
39AQI
4 hours / Day
120 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 40), while the lowest AQI was between 5 AM to 8 AM (Avg. 39).
Night time
Avg. Highest Time
12 AM - 11 PM
40AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
40AQI
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. 40), while the lowest AQI was between 12 AM to 11 PM (Avg. 40).
2025 Days Vs Air Quality
Cornwall, Ontario, Canada
2025
92%
195
8%
18
Total number of days with different AQI categories in last 215 days in 2025 (150 days remaining)
Good
195 DaysModerate
18 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 92%
Health Risk Level:
Very Low
In 2025, 92% of 215 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
Cornwall, Ontario, 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
22AQI
22AQI
2nd January 2025
22AQI
22AQI
3rd January 2025
23AQI
23AQI
4th January 2025
25AQI
25AQI
5th January 2025
25AQI
25AQI
6th January 2025
23AQI
23AQI
7th January 2025
23AQI
23AQI
8th January 2025
24AQI
24AQI
9th January 2025
26AQI
26AQI
10th January 2025
31AQI
31AQI
11th January 2025
32AQI
32AQI
12th January 2025
35AQI
35AQI
13th January 2025
46AQI
46AQI
14th January 2025
24AQI
24AQI
15th January 2025
23AQI
23AQI
16th January 2025
33AQI
33AQI
17th January 2025
49AQI
49AQI
18th January 2025
30AQI
30AQI
19th January 2025
23AQI
23AQI
20th January 2025
28AQI
28AQI
21st January 2025
29AQI
29AQI
22nd January 2025
31AQI
31AQI
23rd January 2025
33AQI
33AQI
24th January 2025
38AQI
38AQI
25th January 2025
41AQI
41AQI
26th January 2025
38AQI
38AQI
27th January 2025
29AQI
29AQI
28th January 2025
29AQI
29AQI
29th January 2025
27AQI
27AQI
30th January 2025
27AQI
27AQI
31st January 2025
46AQI
46AQI
1st February 2025
29AQI
29AQI
2nd February 2025
30AQI
30AQI
3rd February 2025
54AQI
54AQI
4th February 2025
25AQI
25AQI
5th February 2025
24AQI
24AQI
6th February 2025
31AQI
31AQI
7th February 2025
32AQI
32AQI
8th February 2025
26AQI
26AQI
9th February 2025
28AQI
28AQI
10th February 2025
26AQI
26AQI
11th February 2025
28AQI
28AQI
12th February 2025
30AQI
30AQI
13th February 2025
27AQI
27AQI
14th February 2025
28AQI
28AQI
15th February 2025
28AQI
28AQI
16th February 2025
26AQI
26AQI
17th February 2025
24AQI
24AQI
18th February 2025
21AQI
21AQI
19th February 2025
20AQI
20AQI
20th February 2025
23AQI
23AQI
21st February 2025
27AQI
27AQI
22nd February 2025
42AQI
42AQI
23rd February 2025
50AQI
50AQI
24th February 2025
43AQI
43AQI
25th February 2025
60AQI
60AQI
26th February 2025
35AQI
35AQI
27th February 2025
30AQI
30AQI
28th February 2025
32AQI
32AQI
1st March 2025
29AQI
29AQI
2nd March 2025
29AQI
29AQI
3rd March 2025
33AQI
33AQI
4th March 2025
40AQI
40AQI
5th March 2025
53AQI
53AQI
6th March 2025
26AQI
26AQI
7th March 2025
30AQI
30AQI
8th March 2025
32AQI
32AQI
9th March 2025
30AQI
30AQI
10th March 2025
29AQI
29AQI
11th March 2025
36AQI
36AQI
12th March 2025
29AQI
29AQI
13th March 2025
41AQI
41AQI
14th March 2025
64AQI
64AQI
15th March 2025
60AQI
60AQI
16th March 2025
33AQI
33AQI
17th March 2025
18AQI
18AQI
18th March 2025
23AQI
23AQI
19th March 2025
38AQI
38AQI
20th March 2025
33AQI
33AQI
21st March 2025
16AQI
16AQI
22nd March 2025
24AQI
24AQI
23rd March 2025
19AQI
19AQI
24th March 2025
25AQI
25AQI
25th March 2025
22AQI
22AQI
26th March 2025
20AQI
20AQI
27th March 2025
17AQI
17AQI
28th March 2025
18AQI
18AQI
29th March 2025
19AQI
19AQI
30th March 2025
25AQI
25AQI
31st March 2025
29AQI
29AQI
1st April 2025
17AQI
17AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
19AQI
19AQI
4th April 2025
18AQI
18AQI
5th April 2025
26AQI
26AQI
6th April 2025
16AQI
16AQI
7th April 2025
20AQI
20AQI
8th April 2025
18AQI
18AQI
9th April 2025
17AQI
17AQI
10th April 2025
22AQI
22AQI
11th April 2025
32AQI
32AQI
12th April 2025
40AQI
40AQI
13th April 2025
25AQI
25AQI
14th April 2025
26AQI
26AQI
15th April 2025
24AQI
24AQI
16th April 2025
21AQI
21AQI
17th April 2025
15AQI
15AQI
18th April 2025
21AQI
21AQI
19th April 2025
34AQI
34AQI
20th April 2025
19AQI
19AQI
21st April 2025
19AQI
19AQI
22nd April 2025
18AQI
18AQI
23rd April 2025
14AQI
14AQI
24th April 2025
22AQI
22AQI
25th April 2025
24AQI
24AQI
26th April 2025
21AQI
21AQI
27th April 2025
12AQI
12AQI
28th April 2025
16AQI
16AQI
29th April 2025
29AQI
29AQI
30th April 2025
17AQI
17AQI
1st May 2025
22AQI
22AQI
2nd May 2025
22AQI
22AQI
3rd May 2025
14AQI
14AQI
4th May 2025
20AQI
20AQI
5th May 2025
19AQI
19AQI
6th May 2025
17AQI
17AQI
7th May 2025
16AQI
16AQI
8th May 2025
16AQI
16AQI
9th May 2025
21AQI
21AQI
10th May 2025
17AQI
17AQI
11th May 2025
17AQI
17AQI
12th May 2025
20AQI
20AQI
13th May 2025
28AQI
28AQI
14th May 2025
32AQI
32AQI
15th May 2025
27AQI
27AQI
16th May 2025
30AQI
30AQI
17th May 2025
28AQI
28AQI
18th May 2025
16AQI
16AQI
19th May 2025
12AQI
12AQI
20th May 2025
13AQI
13AQI
21st May 2025
18AQI
18AQI
22nd May 2025
13AQI
13AQI
23rd May 2025
15AQI
15AQI
24th May 2025
13AQI
13AQI
25th May 2025
16AQI
16AQI
26th May 2025
19AQI
19AQI
27th May 2025
22AQI
22AQI
28th May 2025
28AQI
28AQI
29th May 2025
23AQI
23AQI
30th May 2025
24AQI
24AQI
31st May 2025
24AQI
24AQI
1st June 2025
13AQI
13AQI
2nd June 2025
17AQI
17AQI
3rd June 2025
26AQI
26AQI
4th June 2025
47AQI
47AQI
5th June 2025
48AQI
48AQI
6th June 2025
53AQI
53AQI
7th June 2025
59AQI
59AQI
8th June 2025
59AQI
59AQI
9th June 2025
58AQI
58AQI
10th June 2025
39AQI
39AQI
11th June 2025
49AQI
49AQI
12th June 2025
56AQI
56AQI
13th June 2025
29AQI
29AQI
14th June 2025
29AQI
29AQI
15th June 2025
29AQI
29AQI
16th June 2025
43AQI
43AQI
17th June 2025
32AQI
32AQI
18th June 2025
23AQI
23AQI
19th June 2025
34AQI
34AQI
20th June 2025
20AQI
20AQI
21st June 2025
42AQI
42AQI
22nd June 2025
46AQI
46AQI
23rd June 2025
46AQI
46AQI
24th June 2025
51AQI
51AQI
25th June 2025
40AQI
40AQI
26th June 2025
26AQI
26AQI
27th June 2025
28AQI
28AQI
28th June 2025
28AQI
28AQI
29th June 2025
21AQI
21AQI
30th June 2025
28AQI
28AQI
1st July 2025
35AQI
35AQI
2nd July 2025
34AQI
34AQI
3rd July 2025
43AQI
43AQI
4th July 2025
29AQI
29AQI
5th July 2025
26AQI
26AQI
6th July 2025
44AQI
44AQI
7th July 2025
49AQI
49AQI
8th July 2025
27AQI
27AQI
9th July 2025
31AQI
31AQI
10th July 2025
36AQI
36AQI
11th July 2025
42AQI
42AQI
12th July 2025
49AQI
49AQI
13th July 2025
39AQI
39AQI
14th July 2025
37AQI
37AQI
15th July 2025
43AQI
43AQI
16th July 2025
54AQI
54AQI
17th July 2025
42AQI
42AQI
18th July 2025
21AQI
21AQI
19th July 2025
26AQI
26AQI
20th July 2025
35AQI
35AQI
21st July 2025
31AQI
31AQI
22nd July 2025
19AQI
19AQI
23rd July 2025
22AQI
22AQI
24th July 2025
29AQI
29AQI
25th July 2025
40AQI
40AQI
26th July 2025
56AQI
56AQI
27th July 2025
60AQI
60AQI
28th July 2025
58AQI
58AQI
29th July 2025
53AQI
53AQI
30th July 2025
65AQI
65AQI
31st July 2025
54AQI
54AQI
1st August 2025
27AQI
27AQI
30AQI
31AQI
30AQI
21AQI
20AQI
37AQI
40AQI
27AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202530AQI
31
26
2
28
3
30
31
24
6
24
7
1
195
18
Highest AQI recorded in
July40AQI
Lowest AQI recorded in
May20AQI
202430AQI
29
2
24
5
31
30
31
28
1
29
2
26
5
29
1
30
1
30
27
4
344
21
Highest AQI recorded in
February37AQI
Lowest AQI recorded in
November25AQI
202337AQI
28
3
24
4
31
30
30
1
17
7
4
2
20
10
1
29
2
23
7
30
1
29
23
8
314
43
5
2
Highest AQI recorded in
June62AQI
Lowest AQI recorded in
October26AQI
202231AQI
28
3
20
1
29
2
30
29
2
28
2
24
2
28
27
4
28
2
30
1
303
17
Highest AQI recorded in
January35AQI
Lowest AQI recorded in
August22AQI
202131AQI
25
5
25
3
30
1
30
30
1
30
26
5
29
2
29
1
31
30
28
3
343
21
Highest AQI recorded in
February35AQI
Lowest AQI recorded in
November25AQI
202028AQI
13
21
16
2
30
31
31
30
31
26
4
31
260
6
Highest AQI recorded in
May37AQI
Lowest AQI recorded in
October22AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
37AQILeast Polluted Year Recorded
2020(Avg.)
28AQICornwall's annual 2025 AQI (30) shows an average percentage change of -3.7% (improved AQI) compared to previous years: 2020 (28), 2021 (31), 2022 (31), 2023 (37), 2024 (30).
