Cornwall, 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, 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 26 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, Cornwall, Ontario, Canada
AQI
Day
Night
.
5 AM1st Aug 2025
8 PM
4 AM2nd Aug 2025
Day time
Avg. Highest Time
5AM1st Aug
28AQI
Avg. Lowest Time
8PM1st Aug
17AQI
Night time
Avg. Highest Time
3AM2nd Aug
40AQI
Avg. Lowest Time
9PM1st Aug
21AQI
In the last 24 hours,
Cornwall's AQI reached its highest point of 40 at 3 AM during the Night, while the lowest point, 17, was recorded at 8 PM during the Day between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Cornwall, 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 2025325 AMAQI
3rd Jul 2025516 AMAQI
3rd Jul 2025527 AMAQI
3rd Jul 2025498 AMAQI
3rd Jul 2025469 AMAQI
3rd Jul 20255010 AMAQI
3rd Jul 20255211 AMAQI
3rd Jul 20255012 PMAQI
3rd Jul 2025461 PMAQI
3rd Jul 2025512 PMAQI
3rd Jul 2025493 PMAQI
3rd Jul 2025504 PMAQI
3rd Jul 2025475 PMAQI
3rd Jul 2025486 PMAQI
3rd Jul 2025477 PMAQI
3rd Jul 2025458 PMAQI
3rd Jul 2025469 PMAQI
3rd Jul 20254410 PMAQI
3rd Jul 20254411 PMAQI
4th Jul 20253912 AMAQI
4th Jul 2025371 AMAQI
4th Jul 2025252 AMAQI
4th Jul 2025243 AMAQI
4th Jul 2025274 AMAQI
22°C18/27°C
4th Jul 2025265 AMAQI
4th Jul 2025256 AMAQI
4th Jul 2025257 AMAQI
4th Jul 2025258 AMAQI
4th Jul 2025349 AMAQI
4th Jul 20254610 AMAQI
4th Jul 20253011 AMAQI
4th Jul 20252612 PMAQI
4th Jul 2025251 PMAQI
4th Jul 2025252 PMAQI
4th Jul 2025233 PMAQI
4th Jul 2025254 PMAQI
4th Jul 2025285 PMAQI
4th Jul 2025266 PMAQI
4th Jul 2025277 PMAQI
4th Jul 2025278 PMAQI
4th Jul 2025289 PMAQI
4th Jul 20252910 PMAQI
4th Jul 20252811 PMAQI
5th Jul 20252812 AMAQI
5th Jul 2025281 AMAQI
5th Jul 2025302 AMAQI
5th Jul 2025263 AMAQI
5th Jul 2025274 AMAQI
19°C11/26°C
5th Jul 2025275 AMAQI
5th Jul 2025246 AMAQI
5th Jul 2025247 AMAQI
5th Jul 2025258 AMAQI
5th Jul 2025269 AMAQI
5th Jul 20252510 AMAQI
5th Jul 20252411 AMAQI
5th Jul 20252512 PMAQI
5th Jul 2025231 PMAQI
5th Jul 2025222 PMAQI
5th Jul 2025223 PMAQI
5th Jul 2025234 PMAQI
5th Jul 2025245 PMAQI
5th Jul 2025246 PMAQI
5th Jul 2025247 PMAQI
5th Jul 2025258 PMAQI
5th Jul 2025279 PMAQI
5th Jul 20252610 PMAQI
5th Jul 20253011 PMAQI
6th Jul 20253212 AMAQI
6th Jul 2025351 AMAQI
6th Jul 2025462 AMAQI
6th Jul 2025443 AMAQI
6th Jul 2025464 AMAQI
22°C15/29°C
6th Jul 2025455 AMAQI
6th Jul 2025426 AMAQI
6th Jul 2025427 AMAQI
6th Jul 2025448 AMAQI
6th Jul 2025449 AMAQI
6th Jul 20254610 AMAQI
6th Jul 20254411 AMAQI
6th Jul 20254412 PMAQI
6th Jul 2025461 PMAQI
6th Jul 2025482 PMAQI
6th Jul 2025493 PMAQI
6th Jul 2025504 PMAQI
6th Jul 2025465 PMAQI
6th Jul 2025476 PMAQI
6th Jul 2025457 PMAQI
6th Jul 2025418 PMAQI
6th Jul 2025459 PMAQI
6th Jul 20254610 PMAQI
6th Jul 20254311 PMAQI
7th Jul 20254812 AMAQI
7th Jul 2025481 AMAQI
7th Jul 2025522 AMAQI
7th Jul 2025493 AMAQI
7th Jul 2025514 AMAQI
28°C22/35°C
7th Jul 2025505 AMAQI
7th Jul 2025526 AMAQI
7th Jul 2025517 AMAQI
7th Jul 2025528 AMAQI
7th Jul 2025539 AMAQI
7th Jul 20255410 AMAQI
7th Jul 20255011 AMAQI
7th Jul 20255112 PMAQI
7th Jul 2025501 PMAQI
7th Jul 2025472 PMAQI
7th Jul 2025463 PMAQI
7th Jul 2025464 PMAQI
7th Jul 2025485 PMAQI
7th Jul 2025506 PMAQI
7th Jul 2025507 PMAQI
7th Jul 2025478 PMAQI
7th Jul 2025509 PMAQI
7th Jul 20254710 PMAQI
7th Jul 20253611 PMAQI
8th Jul 20253912 AMAQI
8th Jul 2025371 AMAQI
8th Jul 2025222 AMAQI
8th Jul 2025223 AMAQI
8th Jul 2025214 AMAQI
21°C16/29°C
8th Jul 2025265 AMAQI
8th Jul 2025216 AMAQI
8th Jul 2025217 AMAQI
8th Jul 2025228 AMAQI
8th Jul 2025249 AMAQI
8th Jul 20252410 AMAQI
8th Jul 20252611 AMAQI
8th Jul 20252812 PMAQI
8th Jul 2025281 PMAQI
8th Jul 2025282 PMAQI
8th Jul 2025283 PMAQI
8th Jul 2025284 PMAQI
8th Jul 2025315 PMAQI
8th Jul 2025296 PMAQI
8th Jul 2025297 PMAQI
8th Jul 2025288 PMAQI
8th Jul 2025269 PMAQI
8th Jul 20252610 PMAQI
8th Jul 20252811 PMAQI
9th Jul 20252812 AMAQI
9th Jul 2025291 AMAQI
9th Jul 2025312 AMAQI
9th Jul 2025323 AMAQI
9th Jul 2025294 AMAQI
20°C16/25°C
9th Jul 2025295 AMAQI
9th Jul 2025306 AMAQI
9th Jul 2025307 AMAQI
9th Jul 2025288 AMAQI
9th Jul 2025299 AMAQI
9th Jul 20253010 AMAQI
9th Jul 20252811 AMAQI
9th Jul 20252812 PMAQI
9th Jul 2025291 PMAQI
9th Jul 2025302 PMAQI
9th Jul 2025263 PMAQI
9th Jul 2025284 PMAQI
9th Jul 2025305 PMAQI
9th Jul 2025306 PMAQI
9th Jul 2025307 PMAQI
9th Jul 2025318 PMAQI
9th Jul 2025309 PMAQI
9th Jul 20253110 PMAQI
9th Jul 20253211 PMAQI
10th Jul 20253112 AMAQI
10th Jul 2025321 AMAQI
10th Jul 2025322 AMAQI
10th Jul 2025333 AMAQI
10th Jul 2025324 AMAQI
22°C15/29°C
10th Jul 2025325 AMAQI
10th Jul 2025316 AMAQI
10th Jul 2025317 AMAQI
10th Jul 2025308 AMAQI
10th Jul 2025319 AMAQI
10th Jul 20253210 AMAQI
10th Jul 20253511 AMAQI
10th Jul 20253612 PMAQI
10th Jul 2025421 PMAQI
10th Jul 2025422 PMAQI
10th Jul 2025433 PMAQI
10th Jul 2025454 PMAQI
10th Jul 2025365 PMAQI
10th Jul 2025366 PMAQI
10th Jul 2025407 PMAQI
10th Jul 2025408 PMAQI
10th Jul 2025369 PMAQI
10th Jul 20253610 PMAQI
10th Jul 20253611 PMAQI
11th Jul 20253712 AMAQI
11th Jul 2025391 AMAQI
11th Jul 2025472 AMAQI
11th Jul 2025463 AMAQI
11th Jul 2025434 AMAQI
24°C17/31°C
11th Jul 2025405 AMAQI
11th Jul 2025366 AMAQI
11th Jul 2025367 AMAQI
11th Jul 2025358 AMAQI
11th Jul 2025409 AMAQI
11th Jul 20254110 AMAQI
11th Jul 20254111 AMAQI
11th Jul 20254312 PMAQI
11th Jul 2025441 PMAQI
11th Jul 2025432 PMAQI
11th Jul 2025443 PMAQI
11th Jul 2025434 PMAQI
11th Jul 2025445 PMAQI
11th Jul 2025426 PMAQI
11th Jul 2025417 PMAQI
11th Jul 2025438 PMAQI
11th Jul 2025419 PMAQI
11th Jul 20254010 PMAQI
11th Jul 20254311 PMAQI
12th Jul 20254212 AMAQI
12th Jul 2025431 AMAQI
12th Jul 2025482 AMAQI
12th Jul 2025533 AMAQI
12th Jul 2025534 AMAQI
25°C17/33°C
12th Jul 2025525 AMAQI
12th Jul 2025506 AMAQI
12th Jul 2025507 AMAQI
12th Jul 2025538 AMAQI
12th Jul 2025529 AMAQI
12th Jul 20255110 AMAQI
12th Jul 20255011 AMAQI
12th Jul 20254912 PMAQI
12th Jul 2025481 PMAQI
12th Jul 2025462 PMAQI
12th Jul 2025483 PMAQI
12th Jul 2025484 PMAQI
12th Jul 2025505 PMAQI
12th Jul 2025516 PMAQI
12th Jul 2025517 PMAQI
12th Jul 2025508 PMAQI
12th Jul 2025499 PMAQI
12th Jul 20254710 PMAQI
12th Jul 20254411 PMAQI
13th Jul 20254712 AMAQI
13th Jul 2025501 AMAQI
13th Jul 2025422 AMAQI
13th Jul 2025393 AMAQI
13th Jul 2025354 AMAQI
25°C18/34°C
13th Jul 2025355 AMAQI
13th Jul 2025356 AMAQI
13th Jul 2025327 AMAQI
13th Jul 2025338 AMAQI
13th Jul 2025359 AMAQI
13th Jul 20253510 AMAQI
13th Jul 20253711 AMAQI
13th Jul 20253812 PMAQI
13th Jul 2025381 PMAQI
13th Jul 2025382 PMAQI
13th Jul 2025363 PMAQI
13th Jul 2025364 PMAQI
13th Jul 2025365 PMAQI
13th Jul 2025376 PMAQI
13th Jul 2025367 PMAQI
13th Jul 2025368 PMAQI
13th Jul 2025399 PMAQI
13th Jul 20253910 PMAQI
13th Jul 20253611 PMAQI
14th Jul 20253612 AMAQI
14th Jul 2025331 AMAQI
14th Jul 2025242 AMAQI
14th Jul 2025243 AMAQI
14th Jul 2025254 AMAQI
26°C23/29°C
14th Jul 2025275 AMAQI
14th Jul 2025286 AMAQI
14th Jul 2025277 AMAQI
14th Jul 2025288 AMAQI
14th Jul 2025309 AMAQI
14th Jul 20253610 AMAQI
14th Jul 20254911 AMAQI
14th Jul 20255112 PMAQI
14th Jul 2025521 PMAQI
14th Jul 2025552 PMAQI
14th Jul 2025513 PMAQI
14th Jul 2025424 PMAQI
14th Jul 2025365 PMAQI
14th Jul 2025366 PMAQI
14th Jul 2025357 PMAQI
14th Jul 2025368 PMAQI
14th Jul 2025409 PMAQI
14th Jul 20254210 PMAQI
14th Jul 20253711 PMAQI
15th Jul 20253812 AMAQI
15th Jul 2025361 AMAQI
15th Jul 2025382 AMAQI
15th Jul 2025283 AMAQI
15th Jul 2025284 AMAQI
26°C21/31°C
15th Jul 2025325 AMAQI
15th Jul 2025346 AMAQI
15th Jul 2025347 AMAQI
15th Jul 2025418 AMAQI
15th Jul 2025579 AMAQI
15th Jul 20255710 AMAQI
15th Jul 20256011 AMAQI
15th Jul 20255812 PMAQI
15th Jul 2025451 PMAQI
15th Jul 2025492 PMAQI
15th Jul 2025503 PMAQI
15th Jul 2025524 PMAQI
15th Jul 2025505 PMAQI
15th Jul 2025496 PMAQI
15th Jul 2025487 PMAQI
15th Jul 2025488 PMAQI
15th Jul 2025459 PMAQI
15th Jul 20254410 PMAQI
15th Jul 20254511 PMAQI
16th Jul 20254612 AMAQI
16th Jul 2025451 AMAQI
16th Jul 2025432 AMAQI
16th Jul 2025463 AMAQI
16th Jul 2025524 AMAQI
26°C18/32°C
16th Jul 2025515 AMAQI
16th Jul 2025516 AMAQI
16th Jul 2025557 AMAQI
16th Jul 2025578 AMAQI
16th Jul 2025649 AMAQI
16th Jul 20256010 AMAQI
16th Jul 20255811 AMAQI
16th Jul 20255812 PMAQI
16th Jul 2025601 PMAQI
16th Jul 2025642 PMAQI
16th Jul 2025623 PMAQI
16th Jul 2025614 PMAQI
16th Jul 2025565 PMAQI
16th Jul 2025566 PMAQI
16th Jul 2025567 PMAQI
16th Jul 2025588 PMAQI
16th Jul 2025559 PMAQI
16th Jul 20255510 PMAQI
16th Jul 20255611 PMAQI
17th Jul 20255512 AMAQI
17th Jul 2025551 AMAQI
17th Jul 2025432 AMAQI
17th Jul 2025403 AMAQI
17th Jul 2025364 AMAQI
28°C21/35°C
17th Jul 2025345 AMAQI
17th Jul 2025336 AMAQI
17th Jul 2025347 AMAQI
17th Jul 2025368 AMAQI
17th Jul 2025399 AMAQI
17th Jul 20253710 AMAQI
17th Jul 20253611 AMAQI
17th Jul 20253812 PMAQI
17th Jul 2025421 PMAQI
17th Jul 2025382 PMAQI
17th Jul 2025363 PMAQI
17th Jul 2025364 PMAQI
17th Jul 2025405 PMAQI
17th Jul 2025396 PMAQI
17th Jul 2025387 PMAQI
17th Jul 2025388 PMAQI
17th Jul 2025399 PMAQI
17th Jul 20253810 PMAQI
17th Jul 20253411 PMAQI
18th Jul 20253412 AMAQI
18th Jul 2025311 AMAQI
18th Jul 2025172 AMAQI
18th Jul 2025173 AMAQI
18th Jul 2025184 AMAQI
25°C17/31°C
18th Jul 2025175 AMAQI
18th Jul 2025176 AMAQI
18th Jul 2025187 AMAQI
18th Jul 2025188 AMAQI
18th Jul 2025179 AMAQI
18th Jul 20251710 AMAQI
18th Jul 20251711 AMAQI
18th Jul 20251812 PMAQI
18th Jul 2025181 PMAQI
18th Jul 2025182 PMAQI
18th Jul 2025193 PMAQI
18th Jul 2025204 PMAQI
18th Jul 2025205 PMAQI
18th Jul 2025196 PMAQI
18th Jul 2025217 PMAQI
18th Jul 2025208 PMAQI
18th Jul 2025199 PMAQI
18th Jul 20252010 PMAQI
18th Jul 20252111 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025231 AMAQI
19th Jul 2025232 AMAQI
19th Jul 2025243 AMAQI
19th Jul 2025244 AMAQI
20°C13/27°C
19th Jul 2025245 AMAQI
19th Jul 2025236 AMAQI
19th Jul 2025237 AMAQI
19th Jul 2025228 AMAQI
19th Jul 2025229 AMAQI
19th Jul 20252310 AMAQI
19th Jul 20252311 AMAQI
19th Jul 20252312 PMAQI
19th Jul 2025221 PMAQI
19th Jul 2025242 PMAQI
19th Jul 2025253 PMAQI
19th Jul 2025254 PMAQI
19th Jul 2025255 PMAQI
19th Jul 2025266 PMAQI
19th Jul 2025277 PMAQI
19th Jul 2025268 PMAQI
19th Jul 2025269 PMAQI
19th Jul 20252610 PMAQI
19th Jul 20252811 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025331 AMAQI
20th Jul 2025372 AMAQI
20th Jul 2025373 AMAQI
20th Jul 2025374 AMAQI
21°C14/29°C
20th Jul 2025345 AMAQI
20th Jul 2025326 AMAQI
20th Jul 2025307 AMAQI
20th Jul 2025308 AMAQI
20th Jul 2025339 AMAQI
20th Jul 20253310 AMAQI
20th Jul 20253211 AMAQI
20th Jul 20253112 PMAQI
20th Jul 2025301 PMAQI
20th Jul 2025302 PMAQI
20th Jul 2025313 PMAQI
20th Jul 2025304 PMAQI
20th Jul 2025325 PMAQI
20th Jul 2025326 PMAQI
20th Jul 2025337 PMAQI
20th Jul 2025338 PMAQI
20th Jul 2025339 PMAQI
20th Jul 20253410 PMAQI
20th Jul 20254011 PMAQI
21st Jul 20253512 AMAQI
21st Jul 2025361 AMAQI
21st Jul 2025402 AMAQI
21st Jul 2025533 AMAQI
21st Jul 2025544 AMAQI
21°C17/27°C
21st Jul 2025485 AMAQI
21st Jul 2025346 AMAQI
21st Jul 2025277 AMAQI
21st Jul 2025248 AMAQI
21st Jul 2025289 AMAQI
21st Jul 20252810 AMAQI
21st Jul 20252611 AMAQI
21st Jul 20252512 PMAQI
21st Jul 2025241 PMAQI
21st Jul 2025232 PMAQI
21st Jul 2025243 PMAQI
21st Jul 2025264 PMAQI
21st Jul 2025285 PMAQI
21st Jul 2025286 PMAQI
21st Jul 2025277 PMAQI
21st Jul 2025278 PMAQI
21st Jul 2025289 PMAQI
21st Jul 20252810 PMAQI
21st Jul 20252611 PMAQI
22nd Jul 20252712 AMAQI
22nd Jul 2025261 AMAQI
22nd Jul 2025192 AMAQI
22nd Jul 2025183 AMAQI
22nd Jul 2025174 AMAQI
18°C13/22°C
22nd Jul 2025175 AMAQI
22nd Jul 2025166 AMAQI
22nd Jul 2025167 AMAQI
22nd Jul 2025168 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20252010 AMAQI
22nd Jul 20251911 AMAQI
22nd Jul 20251712 PMAQI
22nd Jul 2025171 PMAQI
22nd Jul 2025172 PMAQI
22nd Jul 2025183 PMAQI
22nd Jul 2025184 PMAQI
22nd Jul 2025185 PMAQI
22nd Jul 2025196 PMAQI
22nd Jul 2025187 PMAQI
22nd Jul 2025188 PMAQI
22nd Jul 2025189 PMAQI
22nd Jul 20252010 PMAQI
22nd Jul 20251911 PMAQI
23rd Jul 20251912 AMAQI
23rd Jul 2025241 AMAQI
23rd Jul 2025302 AMAQI
23rd Jul 2025223 AMAQI
23rd Jul 2025194 AMAQI
17°C6/24°C
23rd Jul 2025185 AMAQI
23rd Jul 2025186 AMAQI
23rd Jul 2025197 AMAQI
23rd Jul 2025188 AMAQI
23rd Jul 2025229 AMAQI
23rd Jul 20252310 AMAQI
23rd Jul 20252411 AMAQI
23rd Jul 20252012 PMAQI
23rd Jul 2025211 PMAQI
23rd Jul 2025202 PMAQI
23rd Jul 2025213 PMAQI
23rd Jul 2025204 PMAQI
23rd Jul 2025225 PMAQI
23rd Jul 2025226 PMAQI
23rd Jul 2025217 PMAQI
23rd Jul 2025228 PMAQI
23rd Jul 2025229 PMAQI
23rd Jul 20252210 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252312 AMAQI
24th Jul 2025221 AMAQI
24th Jul 2025202 AMAQI
24th Jul 2025203 AMAQI
24th Jul 2025184 AMAQI
21°C12/28°C
24th Jul 2025205 AMAQI
24th Jul 2025226 AMAQI
24th Jul 2025267 AMAQI
24th Jul 2025338 AMAQI
24th Jul 2025369 AMAQI
24th Jul 20254010 AMAQI
24th Jul 20253411 AMAQI
24th Jul 20253412 PMAQI
24th Jul 2025351 PMAQI
24th Jul 2025372 PMAQI
24th Jul 2025363 PMAQI
24th Jul 2025354 PMAQI
24th Jul 2025325 PMAQI
24th Jul 2025316 PMAQI
24th Jul 2025327 PMAQI
24th Jul 2025328 PMAQI
24th Jul 2025329 PMAQI
24th Jul 20253110 PMAQI
24th Jul 20253211 PMAQI
25th Jul 20253412 AMAQI
25th Jul 2025381 AMAQI
25th Jul 2025422 AMAQI
25th Jul 2025453 AMAQI
25th Jul 2025504 AMAQI
27°C18/34°C
25th Jul 2025485 AMAQI
25th Jul 2025446 AMAQI
25th Jul 2025397 AMAQI
25th Jul 2025398 AMAQI
25th Jul 2025379 AMAQI
25th Jul 20253810 AMAQI
25th Jul 20253611 AMAQI
25th Jul 20253212 PMAQI
25th Jul 2025341 PMAQI
25th Jul 2025322 PMAQI
25th Jul 2025323 PMAQI
25th Jul 2025344 PMAQI
25th Jul 2025445 PMAQI
25th Jul 2025426 PMAQI
25th Jul 2025427 PMAQI
25th Jul 2025438 PMAQI
25th Jul 2025469 PMAQI
25th Jul 20254310 PMAQI
25th Jul 20254011 PMAQI
26th Jul 20254012 AMAQI
26th Jul 2025421 AMAQI
26th Jul 2025512 AMAQI
26th Jul 2025733 AMAQI
26th Jul 2025734 AMAQI
25°C21/29°C
26th Jul 2025655 AMAQI
26th Jul 2025586 AMAQI
26th Jul 2025627 AMAQI
26th Jul 2025648 AMAQI
26th Jul 2025649 AMAQI
26th Jul 20255810 AMAQI
26th Jul 20255611 AMAQI
26th Jul 20255412 PMAQI
26th Jul 2025531 PMAQI
26th Jul 2025512 PMAQI
26th Jul 2025583 PMAQI
26th Jul 2025664 PMAQI
26th Jul 2025575 PMAQI
26th Jul 2025586 PMAQI
26th Jul 2025577 PMAQI
26th Jul 2025578 PMAQI
26th Jul 2025569 PMAQI
26th Jul 20255610 PMAQI
26th Jul 20255611 PMAQI
27th Jul 20255512 AMAQI
27th Jul 2025581 AMAQI
27th Jul 2025632 AMAQI
27th Jul 2025663 AMAQI
27th Jul 2025644 AMAQI
24°C13/32°C
27th Jul 2025645 AMAQI
27th Jul 2025656 AMAQI
27th Jul 2025697 AMAQI
27th Jul 2025678 AMAQI
27th Jul 2025639 AMAQI
27th Jul 20256110 AMAQI
27th Jul 20256111 AMAQI
27th Jul 20255912 PMAQI
27th Jul 2025561 PMAQI
27th Jul 2025562 PMAQI
27th Jul 2025553 PMAQI
27th Jul 2025554 PMAQI
27th Jul 2025605 PMAQI
27th Jul 2025596 PMAQI
27th Jul 2025597 PMAQI
27th Jul 2025598 PMAQI
27th Jul 2025609 PMAQI
27th Jul 20256010 PMAQI
27th Jul 20255811 PMAQI
28th Jul 20255812 AMAQI
28th Jul 2025561 AMAQI
28th Jul 2025502 AMAQI
28th Jul 2025423 AMAQI
28th Jul 2025454 AMAQI
26°C21/32°C
28th Jul 2025565 AMAQI
28th Jul 2025606 AMAQI
28th Jul 2025627 AMAQI
28th Jul 2025608 AMAQI
28th Jul 2025609 AMAQI
28th Jul 20256010 AMAQI
28th Jul 20256111 AMAQI
28th Jul 20256012 PMAQI
28th Jul 2025601 PMAQI
28th Jul 2025582 PMAQI
28th Jul 2025603 PMAQI
28th Jul 2025604 PMAQI
28th Jul 2025605 PMAQI
28th Jul 2025596 PMAQI
28th Jul 2025597 PMAQI
28th Jul 2025588 PMAQI
28th Jul 2025599 PMAQI
28th Jul 20255810 PMAQI
28th Jul 20255811 PMAQI
29th Jul 20255812 AMAQI
29th Jul 2025581 AMAQI
29th Jul 2025582 AMAQI
29th Jul 2025583 AMAQI
29th Jul 2025574 AMAQI
26°C19/34°C
29th Jul 2025575 AMAQI
29th Jul 2025566 AMAQI
29th Jul 2025567 AMAQI
29th Jul 2025568 AMAQI
29th Jul 2025539 AMAQI
29th Jul 20254710 AMAQI
29th Jul 20254311 AMAQI
29th Jul 20254212 PMAQI
29th Jul 2025431 PMAQI
29th Jul 2025432 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025474 PMAQI
29th Jul 2025525 PMAQI
29th Jul 2025526 PMAQI
29th Jul 2025527 PMAQI
29th Jul 2025548 PMAQI
29th Jul 2025569 PMAQI
29th Jul 20255710 PMAQI
29th Jul 20255711 PMAQI
30th Jul 20255712 AMAQI
30th Jul 2025581 AMAQI
30th Jul 2025642 AMAQI
30th Jul 2025653 AMAQI
30th Jul 2025684 AMAQI
25°C20/31°C
30th Jul 2025675 AMAQI
30th Jul 2025666 AMAQI
30th Jul 2025667 AMAQI
30th Jul 2025648 AMAQI
30th Jul 2025659 AMAQI
30th Jul 20256410 AMAQI
30th Jul 20256711 AMAQI
30th Jul 20256212 PMAQI
30th Jul 2025641 PMAQI
30th Jul 2025682 PMAQI
30th Jul 2025673 PMAQI
30th Jul 2025684 PMAQI
30th Jul 2025675 PMAQI
30th Jul 2025676 PMAQI
30th Jul 2025677 PMAQI
30th Jul 2025678 PMAQI
30th Jul 2025679 PMAQI
30th Jul 20256710 PMAQI
30th Jul 20256211 PMAQI
31st Jul 20256112 AMAQI
31st Jul 2025621 AMAQI
31st Jul 2025602 AMAQI
31st Jul 2025623 AMAQI
31st Jul 2025624 AMAQI
23°C17/31°C
31st Jul 2025705 AMAQI
31st Jul 2025666 AMAQI
31st Jul 2025597 AMAQI
31st Jul 2025588 AMAQI
31st Jul 2025649 AMAQI
31st Jul 20256610 AMAQI
31st Jul 20256711 AMAQI
31st Jul 20256212 PMAQI
31st Jul 2025561 PMAQI
31st Jul 2025502 PMAQI
31st Jul 2025453 PMAQI
31st Jul 2025364 PMAQI
31st Jul 2025385 PMAQI
31st Jul 2025406 PMAQI
31st Jul 2025367 PMAQI
31st Jul 2025328 PMAQI
31st Jul 2025659 PMAQI
31st Jul 20254810 PMAQI
31st Jul 20253811 PMAQI
1st Aug 20253412 AMAQI
1st Aug 2025341 AMAQI
1st Aug 2025442 AMAQI
1st Aug 2025433 AMAQI
1st Aug 2025354 AMAQI
19°C15/24°C
1st Aug 2025285 AMAQI
1st Aug 2025256 AMAQI
1st Aug 2025227 AMAQI
1st Aug 2025228 AMAQI
1st Aug 2025239 AMAQI
1st Aug 20252210 AMAQI
1st Aug 20251911 AMAQI
1st Aug 20252112 PMAQI
1st Aug 2025191 PMAQI
1st Aug 2025192 PMAQI
1st Aug 2025203 PMAQI
1st Aug 2025174 PMAQI
1st Aug 2025245 PMAQI
1st Aug 2025196 PMAQI
1st Aug 2025187 PMAQI
1st Aug 2025178 PMAQI
1st Aug 2025219 PMAQI
1st Aug 20252410 PMAQI
1st Aug 20252411 PMAQI
2nd Aug 20253212 AMAQI
2nd Aug 2025331 AMAQI
2nd Aug 2025362 AMAQI
2nd Aug 2025403 AMAQI
2nd Aug 2025344 AMAQI
18°C10/25°C
2nd Aug 2025325 AMAQI
5 AM2nd Aug 2025286 AMAQI
2nd Aug 2025297 AMAQI
2nd Aug 2025268 AMAQI
2nd Aug 2025289 AMAQI
2nd Aug 20252510 AMAQI
2nd Aug 20252411 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 AM
38AQI
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. 39), while the lowest AQI was between 5 AM to 8 AM (Avg. 38).
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
Cornwall, Cornwall, Ontario, Canada
2025
92%
195
8%
18
Total number of days with different AQI categories in last 214 days in 2025 (151 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 214 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, 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
24AQI
24AQI
31st March 2025
28AQI
28AQI
1st April 2025
16AQI
16AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
18AQI
18AQI
4th April 2025
18AQI
18AQI
5th April 2025
25AQI
25AQI
6th April 2025
16AQI
16AQI
7th April 2025
19AQI
19AQI
8th April 2025
17AQI
17AQI
9th April 2025
17AQI
17AQI
10th April 2025
21AQI
21AQI
11th April 2025
31AQI
31AQI
12th April 2025
39AQI
39AQI
13th April 2025
24AQI
24AQI
14th April 2025
25AQI
25AQI
15th April 2025
23AQI
23AQI
16th April 2025
20AQI
20AQI
17th April 2025
15AQI
15AQI
18th April 2025
21AQI
21AQI
19th April 2025
34AQI
34AQI
20th April 2025
19AQI
19AQI
21st April 2025
18AQI
18AQI
22nd April 2025
17AQI
17AQI
23rd April 2025
14AQI
14AQI
24th April 2025
21AQI
21AQI
25th April 2025
23AQI
23AQI
26th April 2025
20AQI
20AQI
27th April 2025
12AQI
12AQI
28th April 2025
16AQI
16AQI
29th April 2025
28AQI
28AQI
30th April 2025
16AQI
16AQI
1st May 2025
21AQI
21AQI
2nd May 2025
22AQI
22AQI
3rd May 2025
14AQI
14AQI
4th May 2025
19AQI
19AQI
5th May 2025
18AQI
18AQI
6th May 2025
17AQI
17AQI
7th May 2025
16AQI
16AQI
8th May 2025
15AQI
15AQI
9th May 2025
21AQI
21AQI
10th May 2025
16AQI
16AQI
11th May 2025
17AQI
17AQI
12th May 2025
19AQI
19AQI
13th May 2025
27AQI
27AQI
14th May 2025
31AQI
31AQI
15th May 2025
26AQI
26AQI
16th May 2025
29AQI
29AQI
17th May 2025
27AQI
27AQI
18th May 2025
16AQI
16AQI
19th May 2025
12AQI
12AQI
20th May 2025
13AQI
13AQI
21st May 2025
17AQI
17AQI
22nd May 2025
13AQI
13AQI
23rd May 2025
15AQI
15AQI
24th May 2025
13AQI
13AQI
25th May 2025
15AQI
15AQI
26th May 2025
19AQI
19AQI
27th May 2025
21AQI
21AQI
28th May 2025
27AQI
27AQI
29th May 2025
22AQI
22AQI
30th May 2025
24AQI
24AQI
31st May 2025
23AQI
23AQI
1st June 2025
12AQI
12AQI
2nd June 2025
17AQI
17AQI
3rd June 2025
26AQI
26AQI
4th June 2025
46AQI
46AQI
5th June 2025
47AQI
47AQI
6th June 2025
53AQI
53AQI
7th June 2025
59AQI
59AQI
8th June 2025
59AQI
59AQI
9th June 2025
58AQI
58AQI
10th June 2025
37AQI
37AQI
11th June 2025
49AQI
49AQI
12th June 2025
56AQI
56AQI
13th June 2025
27AQI
27AQI
14th June 2025
28AQI
28AQI
15th June 2025
28AQI
28AQI
16th June 2025
42AQI
42AQI
17th June 2025
31AQI
31AQI
18th June 2025
23AQI
23AQI
19th June 2025
34AQI
34AQI
20th June 2025
20AQI
20AQI
21st June 2025
43AQI
43AQI
22nd June 2025
46AQI
46AQI
23rd June 2025
46AQI
46AQI
24th June 2025
52AQI
52AQI
25th June 2025
38AQI
38AQI
26th June 2025
25AQI
25AQI
27th June 2025
27AQI
27AQI
28th June 2025
28AQI
28AQI
29th June 2025
20AQI
20AQI
30th June 2025
27AQI
27AQI
1st July 2025
34AQI
34AQI
2nd July 2025
33AQI
33AQI
3rd July 2025
44AQI
44AQI
4th July 2025
28AQI
28AQI
5th July 2025
26AQI
26AQI
6th July 2025
44AQI
44AQI
7th July 2025
49AQI
49AQI
8th July 2025
27AQI
27AQI
9th July 2025
30AQI
30AQI
10th July 2025
35AQI
35AQI
11th July 2025
41AQI
41AQI
12th July 2025
49AQI
49AQI
13th July 2025
38AQI
38AQI
14th July 2025
36AQI
36AQI
15th July 2025
44AQI
44AQI
16th July 2025
55AQI
55AQI
17th July 2025
39AQI
39AQI
18th July 2025
20AQI
20AQI
19th July 2025
24AQI
24AQI
20th July 2025
33AQI
33AQI
21st July 2025
32AQI
32AQI
22nd July 2025
19AQI
19AQI
23rd July 2025
21AQI
21AQI
24th July 2025
29AQI
29AQI
25th July 2025
40AQI
40AQI
26th July 2025
58AQI
58AQI
27th July 2025
61AQI
61AQI
28th July 2025
57AQI
57AQI
29th July 2025
53AQI
53AQI
30th July 2025
65AQI
65AQI
31st July 2025
54AQI
54AQI
1st August 2025
26AQI
26AQI
30AQI
31AQI
30AQI
21AQI
20AQI
37AQI
39AQI
26AQI
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
July39AQI
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 -4.7% (improved AQI) compared to previous years: 2020 (28), 2021 (31), 2022 (31), 2023 (37), 2024 (30).
