Port Stanley, St Thomas, 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
Port Stanley, St Thomas, Ontario, Canada
2021
2022
2023
2024
2025
AQI
.
Days
AQI Trends: Highest and Lowest
Highest AQI recorded on
1st Aug 2021
158AQILowest AQI recorded on
18th Aug 2021
18AQISame Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 75 of Moderate air quality, showing improvement over 2021 on the same day.
Download 2024 Annual Data
World Air Quality Report
Day & Night AQI Trend: 1st Aug - 2nd Aug 2025
Port Stanley, St Thomas, Ontario, Canada
AQI
Day
Night
.
6 AM1st Aug 2025
9 PM
5 AM2nd Aug 2025
Day time
Avg. Highest Time
6AM1st Aug
85AQI
Avg. Lowest Time
8PM1st Aug
44AQI
Night time
Avg. Highest Time
9PM1st Aug
68AQI
Avg. Lowest Time
11PM1st Aug
31AQI
In the last 24 hours,
Port Stanley's AQI reached its highest point of 85 at 6 AM during the Day, while the lowest point, 31, was recorded at 11 PM during the Night between 1st Aug and 2nd Aug 2025.
Day & Night AQI Trend : Jul - Aug 2025
Port Stanley, St Thomas, 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 2025426 AMAQI
3rd Jul 2025477 AMAQI
3rd Jul 2025488 AMAQI
3rd Jul 2025469 AMAQI
3rd Jul 20254710 AMAQI
3rd Jul 20254911 AMAQI
3rd Jul 20254812 PMAQI
3rd Jul 2025451 PMAQI
3rd Jul 2025482 PMAQI
3rd Jul 2025503 PMAQI
3rd Jul 2025514 PMAQI
3rd Jul 2025505 PMAQI
3rd Jul 2025506 PMAQI
3rd Jul 2025517 PMAQI
3rd Jul 2025508 PMAQI
3rd Jul 2025499 PMAQI
3rd Jul 20254810 PMAQI
3rd Jul 20254611 PMAQI
4th Jul 20254612 AMAQI
4th Jul 2025471 AMAQI
4th Jul 2025472 AMAQI
4th Jul 2025513 AMAQI
4th Jul 2025504 AMAQI
4th Jul 2025505 AMAQI
23°C16/28°C
4th Jul 2025496 AMAQI
4th Jul 2025447 AMAQI
4th Jul 2025428 AMAQI
4th Jul 2025459 AMAQI
4th Jul 20254410 AMAQI
4th Jul 20254211 AMAQI
4th Jul 20253812 PMAQI
4th Jul 2025391 PMAQI
4th Jul 2025402 PMAQI
4th Jul 2025403 PMAQI
4th Jul 2025424 PMAQI
4th Jul 2025425 PMAQI
4th Jul 2025426 PMAQI
4th Jul 2025407 PMAQI
4th Jul 2025408 PMAQI
4th Jul 2025429 PMAQI
4th Jul 20254310 PMAQI
4th Jul 20254411 PMAQI
5th Jul 20254612 AMAQI
5th Jul 2025511 AMAQI
5th Jul 2025462 AMAQI
5th Jul 2025523 AMAQI
5th Jul 2025494 AMAQI
5th Jul 2025525 AMAQI
20°C12/26°C
5th Jul 2025496 AMAQI
5th Jul 2025527 AMAQI
5th Jul 2025528 AMAQI
5th Jul 2025529 AMAQI
5th Jul 20255310 AMAQI
5th Jul 20255411 AMAQI
5th Jul 20255412 PMAQI
5th Jul 2025531 PMAQI
5th Jul 2025532 PMAQI
5th Jul 2025523 PMAQI
5th Jul 2025544 PMAQI
5th Jul 2025525 PMAQI
5th Jul 2025526 PMAQI
5th Jul 2025527 PMAQI
5th Jul 2025528 PMAQI
5th Jul 2025529 PMAQI
5th Jul 20255310 PMAQI
5th Jul 20255211 PMAQI
6th Jul 20255112 AMAQI
6th Jul 2025521 AMAQI
6th Jul 2025492 AMAQI
6th Jul 2025513 AMAQI
6th Jul 2025504 AMAQI
6th Jul 2025515 AMAQI
26°C19/33°C
6th Jul 2025526 AMAQI
6th Jul 2025557 AMAQI
6th Jul 2025558 AMAQI
6th Jul 2025549 AMAQI
6th Jul 20255310 AMAQI
6th Jul 20255311 AMAQI
6th Jul 20255412 PMAQI
6th Jul 2025531 PMAQI
6th Jul 2025532 PMAQI
6th Jul 2025533 PMAQI
6th Jul 2025534 PMAQI
6th Jul 2025535 PMAQI
6th Jul 2025546 PMAQI
6th Jul 2025547 PMAQI
6th Jul 2025538 PMAQI
6th Jul 2025549 PMAQI
6th Jul 20255410 PMAQI
6th Jul 20255311 PMAQI
7th Jul 20255312 AMAQI
7th Jul 2025541 AMAQI
7th Jul 2025542 AMAQI
7th Jul 2025523 AMAQI
7th Jul 2025524 AMAQI
7th Jul 2025485 AMAQI
27°C22/32°C
7th Jul 2025506 AMAQI
7th Jul 2025507 AMAQI
7th Jul 2025518 AMAQI
7th Jul 2025529 AMAQI
7th Jul 20255110 AMAQI
7th Jul 20255011 AMAQI
7th Jul 20254612 PMAQI
7th Jul 2025461 PMAQI
7th Jul 2025462 PMAQI
7th Jul 2025453 PMAQI
7th Jul 2025464 PMAQI
7th Jul 2025475 PMAQI
7th Jul 2025456 PMAQI
7th Jul 2025447 PMAQI
7th Jul 2025478 PMAQI
7th Jul 2025499 PMAQI
7th Jul 20254610 PMAQI
7th Jul 20254611 PMAQI
8th Jul 20254412 AMAQI
8th Jul 2025431 AMAQI
8th Jul 2025342 AMAQI
8th Jul 2025343 AMAQI
8th Jul 2025364 AMAQI
8th Jul 2025355 AMAQI
21°C16/23°C
8th Jul 2025346 AMAQI
8th Jul 2025357 AMAQI
8th Jul 2025378 AMAQI
8th Jul 2025379 AMAQI
8th Jul 20253510 AMAQI
8th Jul 20253611 AMAQI
8th Jul 20253612 PMAQI
8th Jul 2025361 PMAQI
8th Jul 2025372 PMAQI
8th Jul 2025373 PMAQI
8th Jul 2025384 PMAQI
8th Jul 2025385 PMAQI
8th Jul 2025386 PMAQI
8th Jul 2025377 PMAQI
8th Jul 2025388 PMAQI
8th Jul 2025389 PMAQI
8th Jul 20254110 PMAQI
8th Jul 20254811 PMAQI
9th Jul 20254912 AMAQI
9th Jul 2025511 AMAQI
9th Jul 2025562 AMAQI
9th Jul 2025553 AMAQI
9th Jul 2025574 AMAQI
9th Jul 2025565 AMAQI
20°C12/26°C
9th Jul 2025586 AMAQI
9th Jul 2025557 AMAQI
9th Jul 2025538 AMAQI
9th Jul 2025549 AMAQI
9th Jul 20255610 AMAQI
9th Jul 20255611 AMAQI
9th Jul 20255612 PMAQI
9th Jul 2025541 PMAQI
9th Jul 2025522 PMAQI
9th Jul 2025503 PMAQI
9th Jul 2025514 PMAQI
9th Jul 2025525 PMAQI
9th Jul 2025536 PMAQI
9th Jul 2025537 PMAQI
9th Jul 2025538 PMAQI
9th Jul 2025529 PMAQI
9th Jul 20255010 PMAQI
9th Jul 20254811 PMAQI
10th Jul 20254912 AMAQI
10th Jul 2025471 AMAQI
10th Jul 2025372 AMAQI
10th Jul 2025423 AMAQI
10th Jul 2025444 AMAQI
10th Jul 2025515 AMAQI
22°C18/26°C
10th Jul 2025506 AMAQI
10th Jul 2025517 AMAQI
10th Jul 2025518 AMAQI
10th Jul 2025519 AMAQI
10th Jul 20255110 AMAQI
10th Jul 20255011 AMAQI
10th Jul 20255012 PMAQI
10th Jul 2025511 PMAQI
10th Jul 2025502 PMAQI
10th Jul 2025513 PMAQI
10th Jul 2025524 PMAQI
10th Jul 2025515 PMAQI
10th Jul 2025526 PMAQI
10th Jul 2025527 PMAQI
10th Jul 2025528 PMAQI
10th Jul 2025499 PMAQI
10th Jul 20255010 PMAQI
10th Jul 20254911 PMAQI
11th Jul 20255012 AMAQI
11th Jul 2025501 AMAQI
11th Jul 2025522 AMAQI
11th Jul 2025513 AMAQI
11th Jul 2025524 AMAQI
11th Jul 2025505 AMAQI
23°C18/28°C
11th Jul 2025516 AMAQI
11th Jul 2025517 AMAQI
11th Jul 2025468 AMAQI
11th Jul 2025529 AMAQI
11th Jul 20255210 AMAQI
11th Jul 20255111 AMAQI
11th Jul 20255112 PMAQI
11th Jul 2025511 PMAQI
11th Jul 2025502 PMAQI
11th Jul 2025503 PMAQI
11th Jul 2025514 PMAQI
11th Jul 2025515 PMAQI
11th Jul 2025516 PMAQI
11th Jul 2025507 PMAQI
11th Jul 2025508 PMAQI
11th Jul 2025509 PMAQI
11th Jul 20254910 PMAQI
11th Jul 20255111 PMAQI
12th Jul 20254912 AMAQI
12th Jul 2025481 AMAQI
12th Jul 2025442 AMAQI
12th Jul 2025443 AMAQI
12th Jul 2025414 AMAQI
12th Jul 2025395 AMAQI
22°C17/29°C
12th Jul 2025366 AMAQI
12th Jul 2025377 AMAQI
12th Jul 2025388 AMAQI
12th Jul 2025419 AMAQI
12th Jul 20254110 AMAQI
12th Jul 20254211 AMAQI
12th Jul 20254112 PMAQI
12th Jul 2025431 PMAQI
12th Jul 2025442 PMAQI
12th Jul 2025463 PMAQI
12th Jul 2025444 PMAQI
12th Jul 2025445 PMAQI
12th Jul 2025496 PMAQI
12th Jul 2025437 PMAQI
12th Jul 2025448 PMAQI
12th Jul 2025429 PMAQI
12th Jul 20254210 PMAQI
12th Jul 20254211 PMAQI
13th Jul 20254112 AMAQI
13th Jul 2025401 AMAQI
13th Jul 2025342 AMAQI
13th Jul 2025373 AMAQI
13th Jul 2025364 AMAQI
13th Jul 2025375 AMAQI
26°C21/31°C
13th Jul 2025386 AMAQI
13th Jul 2025387 AMAQI
13th Jul 2025368 AMAQI
13th Jul 2025409 AMAQI
13th Jul 20254010 AMAQI
13th Jul 20253911 AMAQI
13th Jul 20253912 PMAQI
13th Jul 2025381 PMAQI
13th Jul 2025402 PMAQI
13th Jul 2025403 PMAQI
13th Jul 2025414 PMAQI
13th Jul 2025415 PMAQI
13th Jul 2025426 PMAQI
13th Jul 2025427 PMAQI
13th Jul 2025458 PMAQI
13th Jul 2025409 PMAQI
13th Jul 20254110 PMAQI
13th Jul 20254411 PMAQI
14th Jul 20254212 AMAQI
14th Jul 2025451 AMAQI
14th Jul 2025512 AMAQI
14th Jul 2025543 AMAQI
14th Jul 2025534 AMAQI
14th Jul 2025525 AMAQI
25°C22/29°C
14th Jul 2025446 AMAQI
14th Jul 2025467 AMAQI
14th Jul 2025528 AMAQI
14th Jul 2025529 AMAQI
14th Jul 20255310 AMAQI
14th Jul 20255211 AMAQI
14th Jul 20255212 PMAQI
14th Jul 2025541 PMAQI
14th Jul 2025562 PMAQI
14th Jul 2025553 PMAQI
14th Jul 2025564 PMAQI
14th Jul 2025545 PMAQI
14th Jul 2025536 PMAQI
14th Jul 2025547 PMAQI
14th Jul 2025528 PMAQI
14th Jul 2025529 PMAQI
14th Jul 20255310 PMAQI
14th Jul 20255411 PMAQI
15th Jul 20255512 AMAQI
15th Jul 2025551 AMAQI
15th Jul 2025732 AMAQI
15th Jul 2025733 AMAQI
15th Jul 2025764 AMAQI
15th Jul 2025725 AMAQI
25°C19/29°C
15th Jul 2025766 AMAQI
15th Jul 2025747 AMAQI
15th Jul 2025788 AMAQI
15th Jul 2025729 AMAQI
15th Jul 20257310 AMAQI
15th Jul 20257411 AMAQI
15th Jul 20257312 PMAQI
15th Jul 2025721 PMAQI
15th Jul 2025752 PMAQI
15th Jul 2025743 PMAQI
15th Jul 2025764 PMAQI
15th Jul 2025745 PMAQI
15th Jul 2025726 PMAQI
15th Jul 2025727 PMAQI
15th Jul 2025728 PMAQI
15th Jul 2025729 PMAQI
15th Jul 20257010 PMAQI
15th Jul 20257011 PMAQI
16th Jul 20256912 AMAQI
16th Jul 2025741 AMAQI
16th Jul 2025842 AMAQI
16th Jul 2025813 AMAQI
16th Jul 2025844 AMAQI
16th Jul 2025855 AMAQI
23°C16/30°C
16th Jul 2025806 AMAQI
16th Jul 2025827 AMAQI
16th Jul 2025858 AMAQI
16th Jul 2025869 AMAQI
16th Jul 20258310 AMAQI
16th Jul 20258111 AMAQI
16th Jul 20258212 PMAQI
16th Jul 2025791 PMAQI
16th Jul 2025782 PMAQI
16th Jul 2025793 PMAQI
16th Jul 2025734 PMAQI
16th Jul 2025715 PMAQI
16th Jul 2025706 PMAQI
16th Jul 2025647 PMAQI
16th Jul 2025648 PMAQI
16th Jul 2025729 PMAQI
16th Jul 20257410 PMAQI
16th Jul 20256311 PMAQI
17th Jul 20256412 AMAQI
17th Jul 2025631 AMAQI
17th Jul 2025342 AMAQI
17th Jul 2025453 AMAQI
17th Jul 2025444 AMAQI
17th Jul 2025425 AMAQI
24°C21/29°C
17th Jul 2025426 AMAQI
17th Jul 2025457 AMAQI
17th Jul 2025448 AMAQI
17th Jul 2025439 AMAQI
17th Jul 20254110 AMAQI
17th Jul 20254211 AMAQI
17th Jul 20254412 PMAQI
17th Jul 2025471 PMAQI
17th Jul 2025472 PMAQI
17th Jul 2025393 PMAQI
17th Jul 2025434 PMAQI
17th Jul 2025385 PMAQI
17th Jul 2025386 PMAQI
17th Jul 2025397 PMAQI
17th Jul 2025388 PMAQI
17th Jul 2025409 PMAQI
17th Jul 20253910 PMAQI
17th Jul 20253611 PMAQI
18th Jul 20253712 AMAQI
18th Jul 2025331 AMAQI
18th Jul 2025242 AMAQI
18th Jul 2025223 AMAQI
18th Jul 2025224 AMAQI
18th Jul 2025225 AMAQI
22°C18/24°C
18th Jul 2025226 AMAQI
18th Jul 2025227 AMAQI
18th Jul 2025238 AMAQI
18th Jul 2025239 AMAQI
18th Jul 20252310 AMAQI
18th Jul 20252311 AMAQI
18th Jul 20252312 PMAQI
18th Jul 2025221 PMAQI
18th Jul 2025222 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025225 PMAQI
18th Jul 2025236 PMAQI
18th Jul 2025227 PMAQI
18th Jul 2025228 PMAQI
18th Jul 2025219 PMAQI
18th Jul 20252210 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025231 AMAQI
19th Jul 2025222 AMAQI
19th Jul 2025233 AMAQI
19th Jul 2025244 AMAQI
19th Jul 2025265 AMAQI
18°C11/25°C
19th Jul 2025276 AMAQI
19th Jul 2025267 AMAQI
19th Jul 2025268 AMAQI
19th Jul 2025269 AMAQI
19th Jul 20252510 AMAQI
19th Jul 20252511 AMAQI
19th Jul 20252412 PMAQI
19th Jul 2025231 PMAQI
19th Jul 2025222 PMAQI
19th Jul 2025223 PMAQI
19th Jul 2025244 PMAQI
19th Jul 2025255 PMAQI
19th Jul 2025236 PMAQI
19th Jul 2025257 PMAQI
19th Jul 2025248 PMAQI
19th Jul 2025239 PMAQI
19th Jul 20252510 PMAQI
19th Jul 20252511 PMAQI
20th Jul 20252512 AMAQI
20th Jul 2025261 AMAQI
20th Jul 2025222 AMAQI
20th Jul 2025223 AMAQI
20th Jul 2025234 AMAQI
20th Jul 2025235 AMAQI
20°C11/26°C
20th Jul 2025226 AMAQI
20th Jul 2025247 AMAQI
20th Jul 2025248 AMAQI
20th Jul 2025259 AMAQI
20th Jul 20252710 AMAQI
20th Jul 20252611 AMAQI
20th Jul 20252312 PMAQI
20th Jul 2025241 PMAQI
20th Jul 2025242 PMAQI
20th Jul 2025253 PMAQI
20th Jul 2025244 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025236 PMAQI
20th Jul 2025247 PMAQI
20th Jul 2025248 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252510 PMAQI
20th Jul 20252811 PMAQI
21st Jul 20252912 AMAQI
21st Jul 2025291 AMAQI
21st Jul 2025332 AMAQI
21st Jul 2025423 AMAQI
21st Jul 2025474 AMAQI
21st Jul 2025485 AMAQI
22°C15/25°C
21st Jul 2025556 AMAQI
21st Jul 2025567 AMAQI
21st Jul 2025568 AMAQI
21st Jul 2025529 AMAQI
21st Jul 20255410 AMAQI
21st Jul 20255411 AMAQI
21st Jul 20255012 PMAQI
21st Jul 2025451 PMAQI
21st Jul 2025382 PMAQI
21st Jul 2025383 PMAQI
21st Jul 2025384 PMAQI
21st Jul 2025425 PMAQI
21st Jul 2025406 PMAQI
21st Jul 2025397 PMAQI
21st Jul 2025378 PMAQI
21st Jul 2025409 PMAQI
21st Jul 20254010 PMAQI
21st Jul 20253611 PMAQI
22nd Jul 20253712 AMAQI
22nd Jul 2025361 AMAQI
22nd Jul 2025232 AMAQI
22nd Jul 2025223 AMAQI
22nd Jul 2025234 AMAQI
22nd Jul 2025225 AMAQI
18°C11/25°C
22nd Jul 2025256 AMAQI
22nd Jul 2025247 AMAQI
22nd Jul 2025248 AMAQI
22nd Jul 2025259 AMAQI
22nd Jul 20252510 AMAQI
22nd Jul 20252411 AMAQI
22nd Jul 20252412 PMAQI
22nd Jul 2025241 PMAQI
22nd Jul 2025242 PMAQI
22nd Jul 2025243 PMAQI
22nd Jul 2025254 PMAQI
22nd Jul 2025245 PMAQI
22nd Jul 2025236 PMAQI
22nd Jul 2025237 PMAQI
22nd Jul 2025238 PMAQI
22nd Jul 2025249 PMAQI
22nd Jul 20252410 PMAQI
22nd Jul 20252311 PMAQI
23rd Jul 20252312 AMAQI
23rd Jul 2025231 AMAQI
23rd Jul 2025222 AMAQI
23rd Jul 2025223 AMAQI
23rd Jul 2025214 AMAQI
23rd Jul 2025215 AMAQI
19°C11/25°C
23rd Jul 2025236 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025228 AMAQI
23rd Jul 2025239 AMAQI
23rd Jul 20252210 AMAQI
23rd Jul 20252311 AMAQI
23rd Jul 20252412 PMAQI
23rd Jul 2025221 PMAQI
23rd Jul 2025232 PMAQI
23rd Jul 2025223 PMAQI
23rd Jul 2025244 PMAQI
23rd Jul 2025245 PMAQI
23rd Jul 2025246 PMAQI
23rd Jul 2025237 PMAQI
23rd Jul 2025248 PMAQI
23rd Jul 2025239 PMAQI
23rd Jul 20252310 PMAQI
23rd Jul 20252411 PMAQI
24th Jul 20252412 AMAQI
24th Jul 2025231 AMAQI
24th Jul 2025222 AMAQI
24th Jul 2025243 AMAQI
24th Jul 2025284 AMAQI
24th Jul 2025265 AMAQI
20°C13/27°C
24th Jul 2025286 AMAQI
24th Jul 2025297 AMAQI
24th Jul 2025358 AMAQI
24th Jul 2025349 AMAQI
24th Jul 20253610 AMAQI
24th Jul 20254011 AMAQI
24th Jul 20254212 PMAQI
24th Jul 2025421 PMAQI
24th Jul 2025442 PMAQI
24th Jul 2025413 PMAQI
24th Jul 2025404 PMAQI
24th Jul 2025435 PMAQI
24th Jul 2025446 PMAQI
24th Jul 2025437 PMAQI
24th Jul 2025418 PMAQI
24th Jul 2025389 PMAQI
24th Jul 20254010 PMAQI
24th Jul 20254111 PMAQI
25th Jul 20253912 AMAQI
25th Jul 2025371 AMAQI
25th Jul 2025362 AMAQI
25th Jul 2025343 AMAQI
25th Jul 2025344 AMAQI
25th Jul 2025345 AMAQI
26°C18/32°C
25th Jul 2025346 AMAQI
25th Jul 2025347 AMAQI
25th Jul 2025348 AMAQI
25th Jul 2025359 AMAQI
25th Jul 20253610 AMAQI
25th Jul 20253511 AMAQI
25th Jul 20253412 PMAQI
25th Jul 2025341 PMAQI
25th Jul 2025332 PMAQI
25th Jul 2025343 PMAQI
25th Jul 2025344 PMAQI
25th Jul 2025355 PMAQI
25th Jul 2025356 PMAQI
25th Jul 2025337 PMAQI
25th Jul 2025418 PMAQI
25th Jul 2025369 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253411 PMAQI
26th Jul 20253512 AMAQI
26th Jul 2025381 AMAQI
26th Jul 2025542 AMAQI
26th Jul 2025543 AMAQI
26th Jul 2025544 AMAQI
26th Jul 2025535 AMAQI
25°C20/29°C
26th Jul 2025546 AMAQI
26th Jul 2025547 AMAQI
26th Jul 2025548 AMAQI
26th Jul 2025559 AMAQI
26th Jul 20255510 AMAQI
26th Jul 20255611 AMAQI
26th Jul 20255512 PMAQI
26th Jul 2025541 PMAQI
26th Jul 2025522 PMAQI
26th Jul 2025423 PMAQI
26th Jul 2025404 PMAQI
26th Jul 2025435 PMAQI
26th Jul 2025466 PMAQI
26th Jul 2025447 PMAQI
26th Jul 2025448 PMAQI
26th Jul 2025469 PMAQI
26th Jul 20254910 PMAQI
26th Jul 20254311 PMAQI
27th Jul 20254612 AMAQI
27th Jul 2025411 AMAQI
27th Jul 2025272 AMAQI
27th Jul 2025323 AMAQI
27th Jul 2025294 AMAQI
27th Jul 2025305 AMAQI
23°C19/28°C
27th Jul 2025326 AMAQI
27th Jul 2025307 AMAQI
27th Jul 2025328 AMAQI
27th Jul 2025309 AMAQI
27th Jul 20253110 AMAQI
27th Jul 20253211 AMAQI
27th Jul 20253412 PMAQI
27th Jul 2025331 PMAQI
27th Jul 2025332 PMAQI
27th Jul 2025333 PMAQI
27th Jul 2025344 PMAQI
27th Jul 2025345 PMAQI
27th Jul 2025346 PMAQI
27th Jul 2025367 PMAQI
27th Jul 2025358 PMAQI
27th Jul 2025339 PMAQI
27th Jul 20253210 PMAQI
27th Jul 20253511 PMAQI
28th Jul 20253612 AMAQI
28th Jul 2025351 AMAQI
28th Jul 2025342 AMAQI
28th Jul 2025373 AMAQI
28th Jul 2025374 AMAQI
28th Jul 2025375 AMAQI
26°C22/31°C
28th Jul 2025386 AMAQI
28th Jul 2025407 AMAQI
28th Jul 2025408 AMAQI
28th Jul 2025409 AMAQI
28th Jul 20254210 AMAQI
28th Jul 20254411 AMAQI
28th Jul 20254412 PMAQI
28th Jul 2025421 PMAQI
28th Jul 2025412 PMAQI
28th Jul 2025413 PMAQI
28th Jul 2025414 PMAQI
28th Jul 2025425 PMAQI
28th Jul 2025426 PMAQI
28th Jul 2025407 PMAQI
28th Jul 2025418 PMAQI
28th Jul 2025419 PMAQI
28th Jul 20254010 PMAQI
28th Jul 20254011 PMAQI
29th Jul 20254012 AMAQI
29th Jul 2025401 AMAQI
29th Jul 2025412 AMAQI
29th Jul 2025433 AMAQI
29th Jul 2025424 AMAQI
29th Jul 2025415 AMAQI
24°C18/30°C
29th Jul 2025406 AMAQI
29th Jul 2025427 AMAQI
29th Jul 2025428 AMAQI
29th Jul 2025449 AMAQI
29th Jul 20254410 AMAQI
29th Jul 20254411 AMAQI
29th Jul 20254412 PMAQI
29th Jul 2025441 PMAQI
29th Jul 2025422 PMAQI
29th Jul 2025443 PMAQI
29th Jul 2025424 PMAQI
29th Jul 2025435 PMAQI
29th Jul 2025436 PMAQI
29th Jul 2025447 PMAQI
29th Jul 2025438 PMAQI
29th Jul 2025439 PMAQI
29th Jul 20254310 PMAQI
29th Jul 20254311 PMAQI
30th Jul 20254312 AMAQI
30th Jul 2025431 AMAQI
30th Jul 2025442 AMAQI
30th Jul 2025453 AMAQI
30th Jul 2025454 AMAQI
30th Jul 2025435 AMAQI
24°C19/31°C
30th Jul 2025446 AMAQI
30th Jul 2025467 AMAQI
30th Jul 2025468 AMAQI
30th Jul 2025489 AMAQI
30th Jul 20254810 AMAQI
30th Jul 20254811 AMAQI
30th Jul 20254812 PMAQI
30th Jul 2025461 PMAQI
30th Jul 2025482 PMAQI
30th Jul 2025483 PMAQI
30th Jul 2025484 PMAQI
30th Jul 2025485 PMAQI
30th Jul 2025486 PMAQI
30th Jul 2025487 PMAQI
30th Jul 2025488 PMAQI
30th Jul 2025489 PMAQI
30th Jul 20254810 PMAQI
30th Jul 20255111 PMAQI
31st Jul 20255212 AMAQI
31st Jul 2025521 AMAQI
31st Jul 2025662 AMAQI
31st Jul 2025753 AMAQI
31st Jul 2025924 AMAQI
31st Jul 2025855 AMAQI
23°C18/29°C
31st Jul 2025846 AMAQI
31st Jul 2025947 AMAQI
31st Jul 20251038 AMAQI
31st Jul 20251289 AMAQI
31st Jul 20259910 AMAQI
31st Jul 20257211 AMAQI
31st Jul 20259812 PMAQI
31st Jul 20251381 PMAQI
31st Jul 20251342 PMAQI
31st Jul 20251433 PMAQI
31st Jul 20251314 PMAQI
31st Jul 20251375 PMAQI
31st Jul 20251406 PMAQI
31st Jul 20251357 PMAQI
31st Jul 20251248 PMAQI
31st Jul 20251279 PMAQI
31st Jul 202510910 PMAQI
31st Jul 20259311 PMAQI
1st Aug 20259212 AMAQI
1st Aug 2025881 AMAQI
1st Aug 2025882 AMAQI
1st Aug 2025793 AMAQI
1st Aug 2025784 AMAQI
1st Aug 2025805 AMAQI
20°C17/24°C
1st Aug 2025856 AMAQI
1st Aug 2025847 AMAQI
1st Aug 2025838 AMAQI
1st Aug 2025829 AMAQI
1st Aug 20257110 AMAQI
1st Aug 20256411 AMAQI
1st Aug 20256212 PMAQI
1st Aug 2025581 PMAQI
1st Aug 2025562 PMAQI
1st Aug 2025583 PMAQI
1st Aug 2025584 PMAQI
1st Aug 2025565 PMAQI
1st Aug 2025546 PMAQI
1st Aug 2025517 PMAQI
1st Aug 2025448 PMAQI
1st Aug 2025689 PMAQI
1st Aug 20254810 PMAQI
1st Aug 20253111 PMAQI
2nd Aug 20253412 AMAQI
2nd Aug 2025351 AMAQI
2nd Aug 2025362 AMAQI
2nd Aug 2025343 AMAQI
2nd Aug 2025324 AMAQI
2nd Aug 2025325 AMAQI
17°C10/23°C
2nd Aug 2025326 AMAQI
6 AM2nd Aug 2025337 AMAQI
2nd Aug 2025298 AMAQI
2nd Aug 2025309 AMAQI
2nd Aug 20253510 AMAQI
2nd Aug 20253011 AMAQI
1 PM
9 PM
1 AM
5 AM
--°C/°C
Day time
Avg. Highest Time
6 AM - 9 PM
47AQI
16 hours / Day
480 hours / Month
Avg. Lowest Time
6 AM - 9 PM
47AQI
16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 9 PM (Avg. 47), while the lowest AQI was between 6 AM to 9 PM (Avg. 47).
Night time
Avg. Highest Time
12 AM - 11 PM
44AQI
8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM
44AQI
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. 44), while the lowest AQI was between 12 AM to 11 PM (Avg. 44).
2025 Days Vs Air Quality
Port Stanley, St Thomas, Ontario, Canada
2025
88%
187
12%
26
Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)
Good
187 DaysModerate
26 DaysPoor
0 DaysUnhealthy
0 DaysSevere
0 DaysHazardous
0 DaysUnder WHO’s Safe Air Quality Limits: 88%
Health Risk Level:
Low
In 2025, 88% of 214 days were within WHO’s safe air quality limits. The risk of health issues is Low, but the long-term effects, especially on vulnerable individuals, remain uncertain.
Annual Air Quality Insights
Port Stanley, St Thomas, 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
21AQI
21AQI
2nd January 2025
22AQI
22AQI
3rd January 2025
26AQI
26AQI
4th January 2025
26AQI
26AQI
5th January 2025
24AQI
24AQI
6th January 2025
22AQI
22AQI
7th January 2025
24AQI
24AQI
8th January 2025
27AQI
27AQI
9th January 2025
26AQI
26AQI
10th January 2025
45AQI
45AQI
11th January 2025
63AQI
63AQI
12th January 2025
46AQI
46AQI
13th January 2025
32AQI
32AQI
14th January 2025
28AQI
28AQI
15th January 2025
25AQI
25AQI
16th January 2025
49AQI
49AQI
17th January 2025
46AQI
46AQI
18th January 2025
28AQI
28AQI
19th January 2025
27AQI
27AQI
20th January 2025
26AQI
26AQI
21st January 2025
24AQI
24AQI
22nd January 2025
27AQI
27AQI
23rd January 2025
37AQI
37AQI
24th January 2025
27AQI
27AQI
25th January 2025
47AQI
47AQI
26th January 2025
31AQI
31AQI
27th January 2025
26AQI
26AQI
28th January 2025
29AQI
29AQI
29th January 2025
27AQI
27AQI
30th January 2025
27AQI
27AQI
31st January 2025
42AQI
42AQI
1st February 2025
28AQI
28AQI
2nd February 2025
28AQI
28AQI
3rd February 2025
53AQI
53AQI
4th February 2025
26AQI
26AQI
5th February 2025
25AQI
25AQI
6th February 2025
29AQI
29AQI
7th February 2025
28AQI
28AQI
8th February 2025
36AQI
36AQI
9th February 2025
35AQI
35AQI
10th February 2025
31AQI
31AQI
11th February 2025
48AQI
48AQI
12th February 2025
34AQI
34AQI
13th February 2025
28AQI
28AQI
14th February 2025
37AQI
37AQI
15th February 2025
40AQI
40AQI
16th February 2025
30AQI
30AQI
17th February 2025
28AQI
28AQI
18th February 2025
27AQI
27AQI
19th February 2025
24AQI
24AQI
20th February 2025
24AQI
24AQI
21st February 2025
29AQI
29AQI
22nd February 2025
53AQI
53AQI
23rd February 2025
55AQI
55AQI
24th February 2025
51AQI
51AQI
25th February 2025
50AQI
50AQI
26th February 2025
49AQI
49AQI
27th February 2025
49AQI
49AQI
28th February 2025
27AQI
27AQI
1st March 2025
30AQI
30AQI
2nd March 2025
29AQI
29AQI
3rd March 2025
32AQI
32AQI
4th March 2025
34AQI
34AQI
5th March 2025
31AQI
31AQI
6th March 2025
28AQI
28AQI
7th March 2025
31AQI
31AQI
8th March 2025
32AQI
32AQI
9th March 2025
30AQI
30AQI
10th March 2025
29AQI
29AQI
11th March 2025
32AQI
32AQI
12th March 2025
28AQI
28AQI
13th March 2025
25AQI
25AQI
14th March 2025
47AQI
47AQI
15th March 2025
55AQI
55AQI
16th March 2025
23AQI
23AQI
17th March 2025
15AQI
15AQI
18th March 2025
24AQI
24AQI
19th March 2025
30AQI
30AQI
20th March 2025
23AQI
23AQI
21st March 2025
16AQI
16AQI
22nd March 2025
16AQI
16AQI
23rd March 2025
17AQI
17AQI
24th March 2025
20AQI
20AQI
25th March 2025
18AQI
18AQI
26th March 2025
18AQI
18AQI
27th March 2025
29AQI
29AQI
28th March 2025
35AQI
35AQI
29th March 2025
51AQI
51AQI
30th March 2025
29AQI
29AQI
31st March 2025
19AQI
19AQI
1st April 2025
16AQI
16AQI
2nd April 2025
18AQI
18AQI
3rd April 2025
22AQI
22AQI
4th April 2025
17AQI
17AQI
5th April 2025
18AQI
18AQI
6th April 2025
17AQI
17AQI
7th April 2025
17AQI
17AQI
8th April 2025
15AQI
15AQI
9th April 2025
18AQI
18AQI
10th April 2025
25AQI
25AQI
11th April 2025
33AQI
33AQI
12th April 2025
30AQI
30AQI
13th April 2025
28AQI
28AQI
14th April 2025
28AQI
28AQI
15th April 2025
16AQI
16AQI
16th April 2025
14AQI
14AQI
17th April 2025
19AQI
19AQI
18th April 2025
33AQI
33AQI
19th April 2025
42AQI
42AQI
20th April 2025
20AQI
20AQI
21st April 2025
26AQI
26AQI
22nd April 2025
15AQI
15AQI
23rd April 2025
23AQI
23AQI
24th April 2025
38AQI
38AQI
25th April 2025
45AQI
45AQI
26th April 2025
23AQI
23AQI
27th April 2025
17AQI
17AQI
28th April 2025
25AQI
25AQI
29th April 2025
37AQI
37AQI
30th April 2025
20AQI
20AQI
1st May 2025
28AQI
28AQI
2nd May 2025
34AQI
34AQI
3rd May 2025
20AQI
20AQI
4th May 2025
20AQI
20AQI
5th May 2025
22AQI
22AQI
6th May 2025
21AQI
21AQI
7th May 2025
27AQI
27AQI
8th May 2025
21AQI
21AQI
9th May 2025
25AQI
25AQI
10th May 2025
25AQI
25AQI
11th May 2025
20AQI
20AQI
12th May 2025
26AQI
26AQI
13th May 2025
24AQI
24AQI
14th May 2025
17AQI
17AQI
15th May 2025
24AQI
24AQI
16th May 2025
29AQI
29AQI
17th May 2025
24AQI
24AQI
18th May 2025
22AQI
22AQI
19th May 2025
16AQI
16AQI
20th May 2025
16AQI
16AQI
21st May 2025
16AQI
16AQI
22nd May 2025
16AQI
16AQI
23rd May 2025
12AQI
12AQI
24th May 2025
11AQI
11AQI
25th May 2025
15AQI
15AQI
26th May 2025
20AQI
20AQI
27th May 2025
23AQI
23AQI
28th May 2025
16AQI
16AQI
29th May 2025
25AQI
25AQI
30th May 2025
36AQI
36AQI
31st May 2025
27AQI
27AQI
1st June 2025
19AQI
19AQI
2nd June 2025
21AQI
21AQI
3rd June 2025
35AQI
35AQI
4th June 2025
67AQI
67AQI
5th June 2025
57AQI
57AQI
6th June 2025
68AQI
68AQI
7th June 2025
71AQI
71AQI
8th June 2025
88AQI
88AQI
9th June 2025
66AQI
66AQI
10th June 2025
54AQI
54AQI
11th June 2025
60AQI
60AQI
12th June 2025
70AQI
70AQI
13th June 2025
52AQI
52AQI
14th June 2025
38AQI
38AQI
15th June 2025
40AQI
40AQI
16th June 2025
38AQI
38AQI
17th June 2025
32AQI
32AQI
18th June 2025
34AQI
34AQI
19th June 2025
27AQI
27AQI
20th June 2025
32AQI
32AQI
21st June 2025
40AQI
40AQI
22nd June 2025
43AQI
43AQI
23rd June 2025
54AQI
54AQI
24th June 2025
56AQI
56AQI
25th June 2025
50AQI
50AQI
26th June 2025
49AQI
49AQI
27th June 2025
43AQI
43AQI
28th June 2025
34AQI
34AQI
29th June 2025
30AQI
30AQI
30th June 2025
33AQI
33AQI
1st July 2025
30AQI
30AQI
2nd July 2025
36AQI
36AQI
3rd July 2025
44AQI
44AQI
4th July 2025
44AQI
44AQI
5th July 2025
51AQI
51AQI
6th July 2025
52AQI
52AQI
7th July 2025
49AQI
49AQI
8th July 2025
39AQI
39AQI
9th July 2025
53AQI
53AQI
10th July 2025
49AQI
49AQI
11th July 2025
50AQI
50AQI
12th July 2025
44AQI
44AQI
13th July 2025
40AQI
40AQI
14th July 2025
50AQI
50AQI
15th July 2025
69AQI
69AQI
16th July 2025
75AQI
75AQI
17th July 2025
47AQI
47AQI
18th July 2025
25AQI
25AQI
19th July 2025
24AQI
24AQI
20th July 2025
24AQI
24AQI
21st July 2025
40AQI
40AQI
22nd July 2025
26AQI
26AQI
23rd July 2025
23AQI
23AQI
24th July 2025
34AQI
34AQI
25th July 2025
36AQI
36AQI
26th July 2025
46AQI
46AQI
27th July 2025
35AQI
35AQI
28th July 2025
39AQI
39AQI
29th July 2025
42AQI
42AQI
30th July 2025
46AQI
46AQI
31st July 2025
95AQI
95AQI
1st August 2025
75AQI
75AQI
32AQI
36AQI
28AQI
24AQI
22AQI
47AQI
44AQI
75AQI
No. of days
Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days
202533AQI
30
1
24
4
29
2
30
31
18
12
25
6
1
187
26
Highest AQI recorded in
August75AQI
Lowest AQI recorded in
May22AQI
202433AQI
28
3
25
4
30
1
28
28
3
26
2
31
26
5
29
1
29
2
29
1
30
1
339
23
Highest AQI recorded in
January37AQI
Lowest AQI recorded in
November26AQI
202341AQI
24
7
25
3
29
2
23
7
27
4
9
16
4
1
23
7
1
20
11
28
2
29
2
26
3
24
7
287
71
5
1
Highest AQI recorded in
June73AQI
Lowest AQI recorded in
October30AQI
202233AQI
28
3
21
27
4
24
31
24
6
19
4
1
24
3
31
26
4
28
3
284
27
Highest AQI recorded in
June37AQI
Lowest AQI recorded in
August21AQI
202136AQI
27
3
25
3
29
2
28
2
30
1
28
2
21
8
1
1
26
2
1
2
25
5
30
1
30
30
1
329
30
2
3
Highest AQI recorded in
July48AQI
Lowest AQI recorded in
November27AQI
202033AQI
12
21
18
28
2
28
3
29
2
27
3
30
1
26
4
26
5
245
20
Highest AQI recorded in
July37AQI
Lowest AQI recorded in
October28AQI
Most & Least Polluted Years Over the Last 6 Years
Most Polluted Year Recorded
2023(Avg.)
41AQILeast Polluted Year Recorded
2024(Avg.)
33AQIPort Stanley's annual 2025 AQI (33) shows an average percentage change of -4.5% (improved AQI) compared to previous years: 2020 (33), 2021 (36), 2022 (33), 2023 (41), 2024 (33).
