Country Background

Toronto, 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

Toronto, Ontario, Canada

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
4th Aug 2025
114AQI
Lowest AQI recorded on
18th Aug 2025
16AQI


Same Day Analysis (29th August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 4th highest AQI at 21 of Good air quality, showing improvement over 2024, 2023 and 2021 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 29th Aug - 30th Aug 2025

Toronto, Ontario, Canada

AQI
Day
Night
.

6 AM29th Aug 2025

8 PM

5 AM30th Aug 2025

Day time
Avg. Highest Time
6AM29th Aug

19AQI

Avg. Lowest Time
7PM29th Aug

16AQI

Night time
Avg. Highest Time
2AM30th Aug

28AQI

Avg. Lowest Time
9PM29th Aug

19AQI

In the last 24 hours,

Toronto's AQI reached its highest point of 28 at 2 AM during the Night, while the lowest point, 16, was recorded at 7 PM during the Day between 29th Aug and 30th Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Toronto, Ontario, Canada

JulAug
31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th - 21st21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th
Day
Night
31st Jul 2025736 AMAQI
31st Jul 2025697 AMAQI
31st Jul 2025998 AMAQI
31st Jul 20251199 AMAQI
31st Jul 20258710 AMAQI
31st Jul 20255911 AMAQI
31st Jul 202510712 PMAQI
31st Jul 20251481 PMAQI
31st Jul 20251292 PMAQI
31st Jul 20251023 PMAQI
31st Jul 2025884 PMAQI
31st Jul 2025885 PMAQI
31st Jul 2025856 PMAQI
31st Jul 2025947 PMAQI
31st Jul 2025938 PMAQI
31st Jul 20251259 PMAQI
31st Jul 202510210 PMAQI
31st Jul 20258911 PMAQI
1st Aug 20258812 AMAQI
1st Aug 2025851 AMAQI
1st Aug 2025852 AMAQI
1st Aug 2025723 AMAQI
1st Aug 2025654 AMAQI
1st Aug 2025715 AMAQI

22°C19/26°C

1st Aug 2025656 AMAQI
1st Aug 2025587 AMAQI
1st Aug 2025528 AMAQI
1st Aug 2025449 AMAQI
1st Aug 20253710 AMAQI
1st Aug 20253311 AMAQI
1st Aug 20252812 PMAQI
1st Aug 2025251 PMAQI
1st Aug 2025242 PMAQI
1st Aug 2025263 PMAQI
1st Aug 2025224 PMAQI
1st Aug 2025225 PMAQI
1st Aug 2025216 PMAQI
1st Aug 2025217 PMAQI
1st Aug 2025208 PMAQI
1st Aug 2025339 PMAQI
1st Aug 20252710 PMAQI
1st Aug 20252211 PMAQI
2nd Aug 20252412 AMAQI
2nd Aug 2025261 AMAQI
2nd Aug 2025252 AMAQI
2nd Aug 2025273 AMAQI
2nd Aug 2025264 AMAQI
2nd Aug 2025255 AMAQI

21°C17/25°C

2nd Aug 2025256 AMAQI
2nd Aug 2025267 AMAQI
2nd Aug 2025268 AMAQI
2nd Aug 2025289 AMAQI
2nd Aug 20253210 AMAQI
2nd Aug 20253211 AMAQI
2nd Aug 20253612 PMAQI
2nd Aug 2025361 PMAQI
2nd Aug 2025372 PMAQI
2nd Aug 2025423 PMAQI
2nd Aug 2025474 PMAQI
2nd Aug 2025525 PMAQI
2nd Aug 2025566 PMAQI
2nd Aug 2025627 PMAQI
2nd Aug 2025678 PMAQI
2nd Aug 2025419 PMAQI
2nd Aug 20255410 PMAQI
2nd Aug 20257911 PMAQI
3rd Aug 20258412 AMAQI
3rd Aug 2025881 AMAQI
3rd Aug 2025952 AMAQI
3rd Aug 2025973 AMAQI
3rd Aug 2025944 AMAQI
3rd Aug 2025905 AMAQI

22°C14/30°C

3rd Aug 2025946 AMAQI
3rd Aug 20251067 AMAQI
3rd Aug 20251138 AMAQI
3rd Aug 20251079 AMAQI
3rd Aug 202510810 AMAQI
3rd Aug 202510711 AMAQI
3rd Aug 20259712 PMAQI
3rd Aug 2025921 PMAQI
3rd Aug 2025952 PMAQI
3rd Aug 2025923 PMAQI
3rd Aug 2025964 PMAQI
3rd Aug 20251045 PMAQI
3rd Aug 2025926 PMAQI
3rd Aug 2025847 PMAQI
3rd Aug 2025798 PMAQI
3rd Aug 2025959 PMAQI
3rd Aug 202511210 PMAQI
3rd Aug 202511611 PMAQI
4th Aug 202511212 AMAQI
4th Aug 20251051 AMAQI
4th Aug 20251092 AMAQI
4th Aug 20251073 AMAQI
4th Aug 20251144 AMAQI
4th Aug 2025945 AMAQI

23°C15/32°C

4th Aug 2025966 AMAQI
4th Aug 2025987 AMAQI
4th Aug 2025998 AMAQI
4th Aug 20251249 AMAQI
4th Aug 202514310 AMAQI
4th Aug 202514511 AMAQI
4th Aug 202514612 PMAQI
4th Aug 20251381 PMAQI
4th Aug 20251212 PMAQI
4th Aug 20251143 PMAQI
4th Aug 20251124 PMAQI
4th Aug 20251125 PMAQI
4th Aug 20251096 PMAQI
4th Aug 20251117 PMAQI
4th Aug 20251078 PMAQI
4th Aug 20251279 PMAQI
4th Aug 202511310 PMAQI
4th Aug 202510111 PMAQI
5th Aug 202510112 AMAQI
5th Aug 2025991 AMAQI
5th Aug 20251012 AMAQI
5th Aug 20251063 AMAQI
5th Aug 20251054 AMAQI
5th Aug 20251055 AMAQI

25°C17/32°C

5th Aug 20251066 AMAQI
5th Aug 20251117 AMAQI
5th Aug 20251118 AMAQI
5th Aug 20251129 AMAQI
5th Aug 202510810 AMAQI
5th Aug 20259811 AMAQI
5th Aug 20258612 PMAQI
5th Aug 2025791 PMAQI
5th Aug 2025782 PMAQI
5th Aug 2025793 PMAQI
5th Aug 2025854 PMAQI
5th Aug 2025935 PMAQI
5th Aug 2025996 PMAQI
5th Aug 20251017 PMAQI
5th Aug 2025968 PMAQI
5th Aug 20251019 PMAQI
5th Aug 20259710 PMAQI
5th Aug 20259011 PMAQI
6th Aug 20258612 AMAQI
6th Aug 2025791 AMAQI
6th Aug 2025792 AMAQI
6th Aug 2025883 AMAQI
6th Aug 2025924 AMAQI
6th Aug 2025865 AMAQI

25°C20/31°C

6th Aug 2025826 AMAQI
6th Aug 2025757 AMAQI
6th Aug 2025698 AMAQI
6th Aug 2025689 AMAQI
6th Aug 20257010 AMAQI
6th Aug 20256911 AMAQI
6th Aug 20256812 PMAQI
6th Aug 2025681 PMAQI
6th Aug 2025692 PMAQI
6th Aug 2025733 PMAQI
6th Aug 2025784 PMAQI
6th Aug 2025825 PMAQI
6th Aug 2025836 PMAQI
6th Aug 2025787 PMAQI
6th Aug 2025718 PMAQI
6th Aug 2025799 PMAQI
6th Aug 20258210 PMAQI
6th Aug 20258011 PMAQI
7th Aug 20258012 AMAQI
7th Aug 2025731 AMAQI
7th Aug 2025772 AMAQI
7th Aug 2025923 AMAQI
7th Aug 2025934 AMAQI
7th Aug 2025925 AMAQI

25°C20/31°C

7th Aug 2025906 AMAQI
7th Aug 2025867 AMAQI
7th Aug 2025868 AMAQI
7th Aug 2025889 AMAQI
7th Aug 20259210 AMAQI
7th Aug 20258811 AMAQI
7th Aug 20258712 PMAQI
7th Aug 2025871 PMAQI
7th Aug 2025862 PMAQI
7th Aug 2025873 PMAQI
7th Aug 2025864 PMAQI
7th Aug 2025855 PMAQI
7th Aug 2025856 PMAQI
7th Aug 2025867 PMAQI
7th Aug 2025868 PMAQI
7th Aug 2025859 PMAQI
7th Aug 20258610 PMAQI
7th Aug 20258511 PMAQI
8th Aug 20258512 AMAQI
8th Aug 2025861 AMAQI
8th Aug 2025862 AMAQI
8th Aug 2025903 AMAQI
8th Aug 2025924 AMAQI
8th Aug 2025895 AMAQI

25°C21/31°C

8th Aug 2025916 AMAQI
8th Aug 2025967 AMAQI
8th Aug 2025988 AMAQI
8th Aug 2025949 AMAQI
8th Aug 20259210 AMAQI
8th Aug 20259111 AMAQI
8th Aug 20259112 PMAQI
8th Aug 2025901 PMAQI
8th Aug 2025882 PMAQI
8th Aug 2025873 PMAQI
8th Aug 2025854 PMAQI
8th Aug 2025845 PMAQI
8th Aug 2025836 PMAQI
8th Aug 2025807 PMAQI
8th Aug 2025828 PMAQI
8th Aug 2025879 PMAQI
8th Aug 20258710 PMAQI
8th Aug 20258211 PMAQI
9th Aug 20258412 AMAQI
9th Aug 2025831 AMAQI
9th Aug 2025812 AMAQI
9th Aug 2025823 AMAQI
9th Aug 2025794 AMAQI
9th Aug 2025805 AMAQI

25°C21/30°C

9th Aug 2025866 AMAQI
9th Aug 2025807 AMAQI
9th Aug 2025788 AMAQI
9th Aug 2025789 AMAQI
9th Aug 20257910 AMAQI
9th Aug 20257411 AMAQI
9th Aug 20257312 PMAQI
9th Aug 2025721 PMAQI
9th Aug 2025722 PMAQI
9th Aug 2025703 PMAQI
9th Aug 2025704 PMAQI
9th Aug 2025705 PMAQI
9th Aug 2025726 PMAQI
9th Aug 2025717 PMAQI
9th Aug 2025708 PMAQI
9th Aug 2025719 PMAQI
9th Aug 20257310 PMAQI
9th Aug 20256911 PMAQI
10th Aug 20256912 AMAQI
10th Aug 2025681 AMAQI
10th Aug 2025572 AMAQI
10th Aug 2025643 AMAQI
10th Aug 2025654 AMAQI
10th Aug 2025665 AMAQI

27°C22/33°C

10th Aug 2025696 AMAQI
10th Aug 2025687 AMAQI
10th Aug 2025708 AMAQI
10th Aug 2025689 AMAQI
10th Aug 20256710 AMAQI
10th Aug 20256511 AMAQI
10th Aug 20256512 PMAQI
10th Aug 2025651 PMAQI
10th Aug 2025662 PMAQI
10th Aug 2025653 PMAQI
10th Aug 2025644 PMAQI
10th Aug 2025655 PMAQI
10th Aug 2025656 PMAQI
10th Aug 2025647 PMAQI
10th Aug 2025648 PMAQI
10th Aug 2025659 PMAQI
10th Aug 20256410 PMAQI
10th Aug 20256511 PMAQI
11th Aug 20256712 AMAQI
11th Aug 2025681 AMAQI
11th Aug 2025712 AMAQI
11th Aug 2025653 AMAQI
11th Aug 2025594 AMAQI
11th Aug 2025595 AMAQI

29°C24/36°C

11th Aug 2025586 AMAQI
11th Aug 2025607 AMAQI
11th Aug 2025618 AMAQI
11th Aug 2025649 AMAQI
11th Aug 20256410 AMAQI
11th Aug 20256611 AMAQI
11th Aug 20256412 PMAQI
11th Aug 2025631 PMAQI
11th Aug 2025622 PMAQI
11th Aug 2025613 PMAQI
11th Aug 2025604 PMAQI
11th Aug 2025615 PMAQI
11th Aug 2025626 PMAQI
11th Aug 2025617 PMAQI
11th Aug 2025618 PMAQI
11th Aug 2025649 PMAQI
11th Aug 20256110 PMAQI
11th Aug 20255811 PMAQI
12th Aug 20256012 AMAQI
12th Aug 2025581 AMAQI
12th Aug 2025582 AMAQI
12th Aug 2025603 AMAQI
12th Aug 2025604 AMAQI
12th Aug 2025615 AMAQI

29°C23/35°C

12th Aug 2025626 AMAQI
12th Aug 2025607 AMAQI
12th Aug 2025598 AMAQI
12th Aug 2025629 AMAQI
12th Aug 20256410 AMAQI
12th Aug 20256111 AMAQI
12th Aug 20256012 PMAQI
12th Aug 2025591 PMAQI
12th Aug 2025592 PMAQI
12th Aug 2025593 PMAQI
12th Aug 2025584 PMAQI
12th Aug 2025575 PMAQI
12th Aug 2025566 PMAQI
12th Aug 2025547 PMAQI
12th Aug 2025518 PMAQI
12th Aug 2025599 PMAQI
12th Aug 20255410 PMAQI
12th Aug 20254711 PMAQI
13th Aug 20254612 AMAQI
13th Aug 2025481 AMAQI
13th Aug 2025472 AMAQI
13th Aug 2025493 AMAQI
13th Aug 2025494 AMAQI
13th Aug 2025445 AMAQI

29°C24/35°C

13th Aug 2025406 AMAQI
13th Aug 2025377 AMAQI
13th Aug 2025368 AMAQI
13th Aug 2025369 AMAQI
13th Aug 20253710 AMAQI
13th Aug 20253711 AMAQI
13th Aug 20253712 PMAQI
13th Aug 2025411 PMAQI
13th Aug 2025422 PMAQI
13th Aug 2025453 PMAQI
13th Aug 2025484 PMAQI
13th Aug 2025515 PMAQI
13th Aug 2025556 PMAQI
13th Aug 2025587 PMAQI
13th Aug 2025588 PMAQI
13th Aug 2025459 PMAQI
13th Aug 20255010 PMAQI
13th Aug 20255611 PMAQI
14th Aug 20255812 AMAQI
14th Aug 2025611 AMAQI
14th Aug 2025612 AMAQI
14th Aug 2025603 AMAQI
14th Aug 2025594 AMAQI
14th Aug 2025595 AMAQI

27°C22/32°C

14th Aug 2025556 AMAQI
14th Aug 2025577 AMAQI
14th Aug 2025608 AMAQI
14th Aug 2025659 AMAQI
14th Aug 20256810 AMAQI
14th Aug 20256011 AMAQI
14th Aug 20255012 PMAQI
14th Aug 2025571 PMAQI
14th Aug 2025622 PMAQI
14th Aug 2025603 PMAQI
14th Aug 2025614 PMAQI
14th Aug 2025645 PMAQI
14th Aug 2025666 PMAQI
14th Aug 2025697 PMAQI
14th Aug 2025668 PMAQI
14th Aug 2025679 PMAQI
14th Aug 20256810 PMAQI
14th Aug 20256811 PMAQI
15th Aug 20257312 AMAQI
15th Aug 2025651 AMAQI
15th Aug 2025642 AMAQI
15th Aug 2025663 AMAQI
15th Aug 2025674 AMAQI
15th Aug 2025665 AMAQI

24°C18/30°C

15th Aug 2025676 AMAQI
15th Aug 2025687 AMAQI
15th Aug 2025678 AMAQI
15th Aug 2025709 AMAQI
15th Aug 20256710 AMAQI
15th Aug 20256111 AMAQI
15th Aug 20255512 PMAQI
15th Aug 2025481 PMAQI
15th Aug 2025472 PMAQI
15th Aug 2025453 PMAQI
15th Aug 2025494 PMAQI
15th Aug 2025545 PMAQI
15th Aug 2025576 PMAQI
15th Aug 2025587 PMAQI
15th Aug 2025588 PMAQI
15th Aug 2025639 PMAQI
15th Aug 20255810 PMAQI
15th Aug 20255611 PMAQI
16th Aug 20255612 AMAQI
16th Aug 2025561 AMAQI
16th Aug 2025572 AMAQI
16th Aug 2025573 AMAQI
16th Aug 2025584 AMAQI
16th Aug 2025585 AMAQI

26°C21/32°C

16th Aug 2025596 AMAQI
16th Aug 2025597 AMAQI
16th Aug 2025588 AMAQI
16th Aug 2025599 AMAQI
16th Aug 20255810 AMAQI
16th Aug 20255911 AMAQI
16th Aug 20256012 PMAQI
16th Aug 2025621 PMAQI
16th Aug 2025622 PMAQI
16th Aug 2025623 PMAQI
16th Aug 2025624 PMAQI
16th Aug 2025625 PMAQI
16th Aug 2025626 PMAQI
16th Aug 2025647 PMAQI
16th Aug 2025648 PMAQI
16th Aug 2025619 PMAQI
16th Aug 20256110 PMAQI
16th Aug 20256211 PMAQI
17th Aug 20256212 AMAQI
17th Aug 2025601 AMAQI
17th Aug 2025592 AMAQI
17th Aug 2025583 AMAQI
17th Aug 2025584 AMAQI
17th Aug 2025575 AMAQI

27°C21/34°C

17th Aug 2025546 AMAQI
17th Aug 2025507 AMAQI
17th Aug 2025438 AMAQI
17th Aug 2025369 AMAQI
17th Aug 20253210 AMAQI
17th Aug 20253011 AMAQI
17th Aug 20252912 PMAQI
17th Aug 2025311 PMAQI
17th Aug 2025332 PMAQI
17th Aug 2025333 PMAQI
17th Aug 2025294 PMAQI
17th Aug 2025265 PMAQI
17th Aug 2025216 PMAQI
17th Aug 2025187 PMAQI
17th Aug 2025168 PMAQI
17th Aug 2025379 PMAQI
17th Aug 20252610 PMAQI
17th Aug 20251811 PMAQI
18th Aug 20251812 AMAQI
18th Aug 2025161 AMAQI
18th Aug 2025152 AMAQI
18th Aug 2025143 AMAQI
18th Aug 2025134 AMAQI
18th Aug 2025135 AMAQI

23°C19/27°C

18th Aug 2025146 AMAQI
18th Aug 2025147 AMAQI
18th Aug 2025158 AMAQI
18th Aug 2025169 AMAQI
18th Aug 20251710 AMAQI
18th Aug 20251811 AMAQI
18th Aug 20251812 PMAQI
18th Aug 2025171 PMAQI
18th Aug 2025162 PMAQI
18th Aug 2025163 PMAQI
18th Aug 2025154 PMAQI
18th Aug 2025165 PMAQI
18th Aug 2025176 PMAQI
18th Aug 2025177 PMAQI
18th Aug 2025188 PMAQI
18th Aug 2025179 PMAQI
18th Aug 20251810 PMAQI
18th Aug 20251811 PMAQI
19th Aug 20251812 AMAQI
19th Aug 2025191 AMAQI
19th Aug 2025192 AMAQI
19th Aug 2025203 AMAQI
19th Aug 2025194 AMAQI
19th Aug 2025185 AMAQI

19°C14/25°C

19th Aug 2025186 AMAQI
19th Aug 2025187 AMAQI
19th Aug 2025178 AMAQI
19th Aug 2025199 AMAQI
19th Aug 20252110 AMAQI
19th Aug 20252211 AMAQI
19th Aug 20252112 PMAQI
19th Aug 2025221 PMAQI
19th Aug 2025222 PMAQI
19th Aug 2025253 PMAQI
19th Aug 2025254 PMAQI
19th Aug 2025245 PMAQI
19th Aug 2025286 PMAQI
19th Aug 2025297 PMAQI
19th Aug 2025288 PMAQI
19th Aug 2025209 PMAQI
19th Aug 20252510 PMAQI
19th Aug 20252811 PMAQI
20th Aug 20252712 AMAQI
20th Aug 2025251 AMAQI
20th Aug 2025232 AMAQI
20th Aug 2025213 AMAQI
20th Aug 2025204 AMAQI
20th Aug 2025195 AMAQI

21°C18/25°C

20th Aug 2025186 AMAQI
20th Aug 2025207 AMAQI
20th Aug 2025198 AMAQI
20th Aug 2025179 AMAQI
20th Aug 20251710 AMAQI
20th Aug 20251911 AMAQI
20th Aug 20251812 PMAQI
20th Aug 2025171 PMAQI
20th Aug 2025162 PMAQI
20th Aug 2025193 PMAQI
20th Aug 2025174 PMAQI
20th Aug 2025165 PMAQI
20th Aug 2025176 PMAQI
20th Aug 2025197 PMAQI
20th Aug 2025188 PMAQI
20th Aug 2025189 PMAQI
20th Aug 20251810 PMAQI
20th Aug 20251811 PMAQI
21st Aug 20251912 AMAQI
21st Aug 2025201 AMAQI
21st Aug 2025202 AMAQI
21st Aug 2025193 AMAQI
21st Aug 2025184 AMAQI
21st Aug 2025195 AMAQI

20°C18/24°C

21st Aug 2025196 AMAQI
21st Aug 2025197 AMAQI
21st Aug 2025198 AMAQI
21st Aug 2025199 AMAQI
21st Aug 20252010 AMAQI
21st Aug 20252011 AMAQI
21st Aug 20252112 PMAQI
21st Aug 2025211 PMAQI
21st Aug 2025222 PMAQI
21st Aug 2025223 PMAQI
21st Aug 2025204 PMAQI
21st Aug 2025185 PMAQI
21st Aug 2025186 PMAQI
21st Aug 2025177 PMAQI
21st Aug 2025198 PMAQI
21st Aug 2025209 PMAQI
21st Aug 20251810 PMAQI
21st Aug 20251911 PMAQI
22nd Aug 20252112 AMAQI
22nd Aug 2025211 AMAQI
22nd Aug 2025222 AMAQI
22nd Aug 2025243 AMAQI
22nd Aug 2025234 AMAQI
22nd Aug 2025235 AMAQI

21°C17/27°C

22nd Aug 2025246 AMAQI
22nd Aug 2025257 AMAQI
22nd Aug 2025248 AMAQI
22nd Aug 2025279 AMAQI
22nd Aug 20253310 AMAQI
22nd Aug 20253611 AMAQI
22nd Aug 20253312 PMAQI
22nd Aug 2025311 PMAQI
22nd Aug 2025282 PMAQI
22nd Aug 2025283 PMAQI
22nd Aug 2025284 PMAQI
22nd Aug 2025275 PMAQI
22nd Aug 2025276 PMAQI
22nd Aug 2025277 PMAQI
22nd Aug 2025268 PMAQI
22nd Aug 2025289 PMAQI
22nd Aug 20252810 PMAQI
22nd Aug 20253011 PMAQI
23rd Aug 20253012 AMAQI
23rd Aug 2025331 AMAQI
23rd Aug 2025342 AMAQI
23rd Aug 2025353 AMAQI
23rd Aug 2025364 AMAQI
23rd Aug 2025355 AMAQI

23°C16/31°C

23rd Aug 2025356 AMAQI
23rd Aug 2025347 AMAQI
23rd Aug 2025328 AMAQI
23rd Aug 2025319 AMAQI
23rd Aug 20253010 AMAQI
23rd Aug 20253011 AMAQI
23rd Aug 20252712 PMAQI
23rd Aug 2025271 PMAQI
23rd Aug 2025272 PMAQI
23rd Aug 2025283 PMAQI
23rd Aug 2025304 PMAQI
23rd Aug 2025315 PMAQI
23rd Aug 2025336 PMAQI
23rd Aug 2025347 PMAQI
23rd Aug 2025358 PMAQI
23rd Aug 2025349 PMAQI
23rd Aug 20253510 PMAQI
23rd Aug 20253711 PMAQI
24th Aug 20253712 AMAQI
24th Aug 2025381 AMAQI
24th Aug 2025392 AMAQI
24th Aug 2025383 AMAQI
24th Aug 2025374 AMAQI
24th Aug 2025355 AMAQI

23°C19/27°C

24th Aug 2025346 AMAQI
24th Aug 2025337 AMAQI
24th Aug 2025318 AMAQI
24th Aug 2025319 AMAQI
24th Aug 20252910 AMAQI
24th Aug 20252911 AMAQI
24th Aug 20253012 PMAQI
24th Aug 2025271 PMAQI
24th Aug 2025272 PMAQI
24th Aug 2025273 PMAQI
24th Aug 2025284 PMAQI
24th Aug 2025275 PMAQI
24th Aug 2025276 PMAQI
24th Aug 2025277 PMAQI
24th Aug 2025258 PMAQI
24th Aug 2025319 PMAQI
24th Aug 20252710 PMAQI
24th Aug 20252411 PMAQI
25th Aug 20252412 AMAQI
25th Aug 2025251 AMAQI
25th Aug 2025252 AMAQI
25th Aug 2025253 AMAQI
25th Aug 2025244 AMAQI
25th Aug 2025245 AMAQI

21°C17/24°C

25th Aug 2025236 AMAQI
25th Aug 2025237 AMAQI
25th Aug 2025238 AMAQI
25th Aug 2025219 AMAQI
25th Aug 20252310 AMAQI
25th Aug 20252211 AMAQI
25th Aug 20251812 PMAQI
25th Aug 2025161 PMAQI
25th Aug 2025182 PMAQI
25th Aug 2025183 PMAQI
25th Aug 2025164 PMAQI
25th Aug 2025155 PMAQI
25th Aug 2025146 PMAQI
25th Aug 2025157 PMAQI
25th Aug 2025168 PMAQI
25th Aug 2025189 PMAQI
25th Aug 20251810 PMAQI
25th Aug 20251711 PMAQI
26th Aug 20251712 AMAQI
26th Aug 2025171 AMAQI
26th Aug 2025262 AMAQI
26th Aug 2025183 AMAQI
26th Aug 2025184 AMAQI
26th Aug 2025195 AMAQI

19°C14/22°C

26th Aug 2025206 AMAQI
26th Aug 2025197 AMAQI
26th Aug 2025238 AMAQI
26th Aug 2025249 AMAQI
26th Aug 20252510 AMAQI
26th Aug 20252411 AMAQI
26th Aug 20252312 PMAQI
26th Aug 2025211 PMAQI
26th Aug 2025212 PMAQI
26th Aug 2025193 PMAQI
26th Aug 2025194 PMAQI
26th Aug 2025195 PMAQI
26th Aug 2025186 PMAQI
26th Aug 2025177 PMAQI
26th Aug 2025168 PMAQI
26th Aug 2025199 PMAQI
26th Aug 20251810 PMAQI
26th Aug 20251811 PMAQI
27th Aug 20251812 AMAQI
27th Aug 2025191 AMAQI
27th Aug 2025202 AMAQI
27th Aug 2025233 AMAQI
27th Aug 2025254 AMAQI
27th Aug 2025255 AMAQI

17°C12/21°C

27th Aug 2025256 AMAQI
27th Aug 2025237 AMAQI
27th Aug 2025228 AMAQI
27th Aug 2025229 AMAQI
27th Aug 20252310 AMAQI
27th Aug 20252211 AMAQI
27th Aug 20252212 PMAQI
27th Aug 2025211 PMAQI
27th Aug 2025202 PMAQI
27th Aug 2025203 PMAQI
27th Aug 2025194 PMAQI
27th Aug 2025205 PMAQI
27th Aug 2025196 PMAQI
27th Aug 2025197 PMAQI
27th Aug 2025198 PMAQI
27th Aug 2025219 PMAQI
27th Aug 20252010 PMAQI
27th Aug 20252011 PMAQI
28th Aug 20252112 AMAQI
28th Aug 2025231 AMAQI
28th Aug 2025252 AMAQI
28th Aug 2025233 AMAQI
28th Aug 2025234 AMAQI
28th Aug 2025235 AMAQI

16°C9/22°C

28th Aug 2025216 AMAQI
28th Aug 2025267 AMAQI
28th Aug 2025318 AMAQI
28th Aug 2025369 AMAQI
28th Aug 20253510 AMAQI
28th Aug 20253911 AMAQI
28th Aug 20253512 PMAQI
28th Aug 2025361 PMAQI
28th Aug 2025332 PMAQI
28th Aug 2025323 PMAQI
28th Aug 2025354 PMAQI
28th Aug 2025315 PMAQI
28th Aug 2025276 PMAQI
28th Aug 2025277 PMAQI
28th Aug 2025268 PMAQI
28th Aug 2025289 PMAQI
28th Aug 20252610 PMAQI
28th Aug 20252711 PMAQI
29th Aug 20252712 AMAQI
29th Aug 2025211 AMAQI
29th Aug 2025202 AMAQI
29th Aug 2025223 AMAQI
29th Aug 2025194 AMAQI
29th Aug 2025195 AMAQI

17°C15/21°C

29th Aug 2025196 AMAQI
29th Aug 2025197 AMAQI
29th Aug 2025188 AMAQI
29th Aug 2025199 AMAQI
29th Aug 20251910 AMAQI
29th Aug 20251811 AMAQI
29th Aug 20251712 PMAQI
29th Aug 2025161 PMAQI
29th Aug 2025172 PMAQI
29th Aug 2025173 PMAQI
29th Aug 2025174 PMAQI
29th Aug 2025195 PMAQI
29th Aug 2025176 PMAQI
29th Aug 2025167 PMAQI
29th Aug 2025218 PMAQI
29th Aug 2025199 PMAQI
29th Aug 20252110 PMAQI
29th Aug 20252211 PMAQI
30th Aug 20252312 AMAQI
30th Aug 2025261 AMAQI
30th Aug 2025282 AMAQI
30th Aug 2025273 AMAQI
30th Aug 2025254 AMAQI
30th Aug 2025235 AMAQI

15°C10/21°C

30th Aug 2025226 AMAQI
6 AM
30th Aug 2025227 AMAQI
30th Aug 2025218 AMAQI
30th Aug 2025219 AMAQI
30th Aug 20252110 AMAQI
30th Aug 20252111 AMAQI
30th Aug 20251912 PMAQI
30th Aug 2025171 PMAQI
1 PM
30th Aug 2025172 PMAQI
30th Aug 2025173 PMAQI
30th Aug 2025174 PMAQI
30th Aug 2025225 PMAQI
30th Aug 2025206 PMAQI
30th Aug 2025177 PMAQI
8 PM
1 AM
5 AM

--°C/°C

Day time
Avg. Highest Time
6 AM - 10 AM

51AQI

5 hours / Day
150 hours / Month
Avg. Lowest Time
11 AM - 8 PM

49AQI

10 hours / Day
300 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 6 AM to 10 AM (Avg. 51), while the lowest AQI was between 11 AM to 8 PM (Avg. 49).
Night time
Avg. Highest Time
9 PM - 11 PM

52AQI

3 hours / Day
90 hours / Month
Avg. Lowest Time
12 AM - 5 AM

51AQI

6 hours / Day
180 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 9 PM to 11 PM (Avg. 52), while the lowest AQI was between 12 AM to 5 AM (Avg. 51).

2025 Days Vs Air Quality

Toronto, Ontario, Canada

2025

83%

199

17%

41

0.4%

1

Total number of days with different AQI categories in last 242 days in 2025 (123 days remaining)

Good
199 Days
Moderate
41 Days
Poor
1 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days



Under WHO’s Safe Air Quality Limits: 83%

Health Risk Level:

Low

In 2025, 83% of 242 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

Toronto, 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.

-1th undefined 2025
-1th undefined 2025
-1th undefined 2025
1st January 2025
21AQI
2nd January 2025
20AQI
3rd January 2025
22AQI
4th January 2025
26AQI
5th January 2025
24AQI
6th January 2025
20AQI
7th January 2025
20AQI
8th January 2025
21AQI
9th January 2025
23AQI
10th January 2025
41AQI
11th January 2025
65AQI
12th January 2025
51AQI
13th January 2025
40AQI
14th January 2025
25AQI
15th January 2025
26AQI
16th January 2025
56AQI
17th January 2025
43AQI
18th January 2025
27AQI
19th January 2025
23AQI
20th January 2025
23AQI
21st January 2025
28AQI
22nd January 2025
33AQI
23rd January 2025
46AQI
24th January 2025
36AQI
25th January 2025
52AQI
26th January 2025
32AQI
27th January 2025
26AQI
28th January 2025
25AQI
29th January 2025
27AQI
30th January 2025
27AQI
31st January 2025
63AQI
1st February 2025
25AQI
2nd February 2025
28AQI
3rd February 2025
57AQI
4th February 2025
22AQI
5th February 2025
25AQI
6th February 2025
38AQI
7th February 2025
26AQI
8th February 2025
39AQI
9th February 2025
30AQI
10th February 2025
28AQI
11th February 2025
45AQI
12th February 2025
26AQI
13th February 2025
26AQI
14th February 2025
26AQI
15th February 2025
33AQI
16th February 2025
26AQI
17th February 2025
25AQI
18th February 2025
24AQI
19th February 2025
22AQI
20th February 2025
21AQI
21st February 2025
25AQI
22nd February 2025
48AQI
23rd February 2025
61AQI
24th February 2025
61AQI
25th February 2025
66AQI
26th February 2025
30AQI
27th February 2025
37AQI
28th February 2025
25AQI
1st March 2025
28AQI
2nd March 2025
28AQI
3rd March 2025
33AQI
4th March 2025
43AQI
5th March 2025
43AQI
6th March 2025
24AQI
7th March 2025
30AQI
8th March 2025
32AQI
9th March 2025
29AQI
10th March 2025
37AQI
11th March 2025
37AQI
12th March 2025
25AQI
13th March 2025
31AQI
14th March 2025
60AQI
15th March 2025
58AQI
16th March 2025
34AQI
17th March 2025
19AQI
18th March 2025
30AQI
19th March 2025
36AQI
20th March 2025
28AQI
21st March 2025
22AQI
22nd March 2025
20AQI
23rd March 2025
24AQI
24th March 2025
25AQI
25th March 2025
19AQI
26th March 2025
21AQI
27th March 2025
28AQI
28th March 2025
21AQI
29th March 2025
20AQI
30th March 2025
27AQI
31st March 2025
29AQI
1st April 2025
18AQI
2nd April 2025
18AQI
3rd April 2025
32AQI
4th April 2025
22AQI
5th April 2025
26AQI
6th April 2025
18AQI
7th April 2025
22AQI
8th April 2025
16AQI
9th April 2025
23AQI
10th April 2025
36AQI
11th April 2025
31AQI
12th April 2025
32AQI
13th April 2025
36AQI
14th April 2025
31AQI
15th April 2025
21AQI
16th April 2025
15AQI
17th April 2025
22AQI
18th April 2025
37AQI
19th April 2025
44AQI
20th April 2025
18AQI
21st April 2025
21AQI
22nd April 2025
18AQI
23rd April 2025
20AQI
24th April 2025
38AQI
25th April 2025
37AQI
26th April 2025
31AQI
27th April 2025
15AQI
28th April 2025
29AQI
29th April 2025
36AQI
30th April 2025
20AQI
1st May 2025
27AQI
2nd May 2025
31AQI
3rd May 2025
17AQI
4th May 2025
18AQI
5th May 2025
20AQI
6th May 2025
21AQI
7th May 2025
29AQI
8th May 2025
18AQI
9th May 2025
22AQI
10th May 2025
26AQI
11th May 2025
24AQI
12th May 2025
28AQI
13th May 2025
36AQI
14th May 2025
24AQI
15th May 2025
27AQI
16th May 2025
33AQI
17th May 2025
34AQI
18th May 2025
21AQI
19th May 2025
15AQI
20th May 2025
16AQI
21st May 2025
17AQI
22nd May 2025
14AQI
23rd May 2025
16AQI
24th May 2025
16AQI
25th May 2025
17AQI
26th May 2025
23AQI
27th May 2025
32AQI
28th May 2025
25AQI
29th May 2025
28AQI
30th May 2025
33AQI
31st May 2025
27AQI
1st June 2025
18AQI
2nd June 2025
22AQI
3rd June 2025
41AQI
4th June 2025
58AQI
5th June 2025
49AQI
6th June 2025
61AQI
7th June 2025
63AQI
8th June 2025
76AQI
9th June 2025
66AQI
10th June 2025
51AQI
11th June 2025
59AQI
12th June 2025
65AQI
13th June 2025
41AQI
14th June 2025
32AQI
15th June 2025
39AQI
16th June 2025
40AQI
17th June 2025
39AQI
18th June 2025
42AQI
19th June 2025
38AQI
20th June 2025
36AQI
21st June 2025
49AQI
22nd June 2025
53AQI
23rd June 2025
55AQI
24th June 2025
56AQI
25th June 2025
46AQI
26th June 2025
42AQI
27th June 2025
39AQI
28th June 2025
35AQI
29th June 2025
36AQI
30th June 2025
41AQI
1st July 2025
42AQI
2nd July 2025
40AQI
3rd July 2025
50AQI
4th July 2025
35AQI
5th July 2025
48AQI
6th July 2025
53AQI
7th July 2025
49AQI
8th July 2025
35AQI
9th July 2025
41AQI
10th July 2025
44AQI
11th July 2025
52AQI
12th July 2025
49AQI
13th July 2025
46AQI
14th July 2025
48AQI
15th July 2025
56AQI
16th July 2025
59AQI
17th July 2025
45AQI
18th July 2025
25AQI
19th July 2025
31AQI
20th July 2025
29AQI
21st July 2025
42AQI
22nd July 2025
23AQI
23rd July 2025
22AQI
24th July 2025
35AQI
25th July 2025
36AQI
26th July 2025
52AQI
27th July 2025
48AQI
28th July 2025
51AQI
29th July 2025
47AQI
30th July 2025
50AQI
31st July 2025
83AQI
1st August 2025
49AQI
2nd August 2025
38AQI
3rd August 2025
96AQI
4th August 2025
114AQI
5th August 2025
99AQI
6th August 2025
79AQI
7th August 2025
86AQI
8th August 2025
88AQI
9th August 2025
77AQI
10th August 2025
66AQI
11th August 2025
63AQI
12th August 2025
58AQI
13th August 2025
47AQI
14th August 2025
61AQI
15th August 2025
62AQI
16th August 2025
60AQI
17th August 2025
41AQI
18th August 2025
16AQI
19th August 2025
22AQI
20th August 2025
20AQI
21st August 2025
19AQI
22nd August 2025
27AQI
23rd August 2025
32AQI
24th August 2025
31AQI
25th August 2025
21AQI
26th August 2025
19AQI
27th August 2025
21AQI
28th August 2025
27AQI
29th August 2025
21AQI
30th August 2025
31st August 2025
1st September 2025
2nd September 2025
3rd September 2025
4th September 2025
5th September 2025
6th September 2025
7th September 2025
8th September 2025
9th September 2025
10th September 2025
11th September 2025
12th September 2025
13th September 2025
14th September 2025
15th September 2025
16th September 2025
17th September 2025
18th September 2025
19th September 2025
20th September 2025
21st September 2025
22nd September 2025
23rd September 2025
24th September 2025
25th September 2025
26th September 2025
27th September 2025
28th September 2025
29th September 2025
30th September 2025
1st October 2025
2nd October 2025
3rd October 2025
4th October 2025
5th October 2025
6th October 2025
7th October 2025
8th October 2025
9th October 2025
10th October 2025
11th October 2025
12th October 2025
13th October 2025
14th October 2025
15th October 2025
16th October 2025
17th October 2025
18th October 2025
19th October 2025
20th October 2025
21st October 2025
22nd October 2025
23rd October 2025
24th October 2025
25th October 2025
26th October 2025
27th October 2025
28th October 2025
29th October 2025
30th October 2025
31st October 2025
1st November 2025
2nd November 2025
3rd November 2025
4th November 2025
5th November 2025
6th November 2025
7th November 2025
8th November 2025
9th November 2025
10th November 2025
11th November 2025
12th November 2025
13th November 2025
14th November 2025
15th November 2025
16th November 2025
17th November 2025
18th November 2025
19th November 2025
20th November 2025
21st November 2025
22nd November 2025
23rd November 2025
24th November 2025
25th November 2025
26th November 2025
27th November 2025
28th November 2025
29th November 2025
30th November 2025
1st December 2025
2nd December 2025
3rd December 2025
4th December 2025
5th December 2025
6th December 2025
7th December 2025
8th December 2025
9th December 2025
10th December 2025
11th December 2025
12th December 2025
13th December 2025
14th December 2025
15th December 2025
16th December 2025
17th December 2025
18th December 2025
19th December 2025
20th December 2025
21st December 2025
22nd December 2025
23rd December 2025
24th December 2025
25th December 2025
26th December 2025
27th December 2025
28th December 2025
29th December 2025
30th December 2025
31st December 2025

33AQI

34AQI

30AQI

26AQI

24AQI

46AQI

44AQI

50AQI


No. of days

Jan.Feb.Mar.Apr.MayJun.Jul.Aug.Sep.Oct.Nov.Dec.Total Days

202536AQI

26
5
24
4
29
2
30
31
19
11
24
7
16
12
1
199
41
1

Highest AQI recorded in

August

50AQI


Lowest AQI recorded in

May

24AQI


202432AQI

27
4
26
3
29
2
30
30
1
27
2
29
2
23
8
27
3
26
5
30
29
2
333
32

Highest AQI recorded in

July

38AQI


Lowest AQI recorded in

November

24AQI


202339AQI

26
5
22
6
29
2
24
6
28
3
15
10
4
1
23
8
22
9
27
3
28
3
27
2
24
7
295
64
4
1

Highest AQI recorded in

June

65AQI


Lowest AQI recorded in

October

30AQI


202233AQI

28
3
21
26
5
23
1
30
1
28
2
23
1
1
30
28
3
25
5
30
1
293
22

Highest AQI recorded in

November

37AQI


Lowest AQI recorded in

August

20AQI


202134AQI

24
6
26
2
26
5
28
2
25
6
28
2
24
6
1
27
4
30
31
26
4
29
2
324
39
1

Highest AQI recorded in

July

42AQI


Lowest AQI recorded in

September

26AQI


202032AQI

12
1
20
1
17
1
28
2
29
2
30
1
27
3
30
1
26
4
26
5
245
21

Highest AQI recorded in

November

36AQI


Lowest AQI recorded in

October

26AQI


Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
39AQI
Least Polluted Year Recorded
2020(Avg.)
32AQI


Toronto's annual 2025 AQI (36) shows an average percentage change of 5.5% (worsened AQI) compared to previous years: 2020 (32), 2021 (34), 2022 (33), 2023 (39), 2024 (32).