Country Background
HistoryAQIPM₂.₅PM₁₀COSO₂NO₂O₃

Thunder Bay, 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+

July Air Quality Analysis

Thunder Bay, Ontario, Canada

2022
2023
2024
2025
2026
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
31st Jul 2025
130AQI
Lowest AQI recorded on
17th Jul 2023
11AQI

Same Day Analysis (30th July):
On this day, AQI across the 5 years varied significantly: 2026 ranks 2nd highest AQI at 50 of Good air quality, showing improvement over 2025 on the same day.

Day & Night AQI Trend: 29th Jul - 30th Jul 2026

Thunder Bay, Ontario, Canada

AQI
Day
Night
.

6 AM29th Jul 2026

9 PM

5 AM30th Jul 2026

Day time
Avg. Highest Time
6PM29th Jul

56AQI

Avg. Lowest Time
8AM29th Jul

21AQI

Night time
Avg. Highest Time
4AM30th Jul

57AQI

Avg. Lowest Time
5AM30th Jul

48AQI

In the last 24 hours,

Thunder Bay's AQI reached its highest point of 57 at 4 AM during the Night, while the lowest point, 21, was recorded at 8 AM during the Day between 29th Jul and 30th Jul 2026.

Day & Night AQI Trend : Jul 2026

Thunder Bay, Ontario, Canada

Jul
01st - 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
1st Jul 2026266 AMAQI
1st Jul 2026287 AMAQI
1st Jul 2026288 AMAQI
1st Jul 2026269 AMAQI
1st Jul 20263010 AMAQI
1st Jul 20263011 AMAQI
1st Jul 20262812 PMAQI
1st Jul 2026301 PMAQI
1st Jul 2026282 PMAQI
1st Jul 2026283 PMAQI
1st Jul 2026284 PMAQI
1st Jul 2026285 PMAQI
1st Jul 2026256 PMAQI
1st Jul 2026287 PMAQI
1st Jul 2026288 PMAQI
1st Jul 2026249 PMAQI
1st Jul 20262310 PMAQI
1st Jul 20262211 PMAQI
2nd Jul 20262212 AMAQI
2nd Jul 2026221 AMAQI
2nd Jul 2026242 AMAQI
2nd Jul 2026233 AMAQI
2nd Jul 2026284 AMAQI
2nd Jul 2026285 AMAQI

22°C11/32°C

2nd Jul 2026296 AMAQI
2nd Jul 2026287 AMAQI
2nd Jul 2026288 AMAQI
2nd Jul 2026269 AMAQI
2nd Jul 20263010 AMAQI
2nd Jul 20262811 AMAQI
2nd Jul 20262912 PMAQI
2nd Jul 2026281 PMAQI
2nd Jul 2026282 PMAQI
2nd Jul 2026273 PMAQI
2nd Jul 2026284 PMAQI
2nd Jul 2026295 PMAQI
2nd Jul 2026266 PMAQI
2nd Jul 2026287 PMAQI
2nd Jul 2026278 PMAQI
2nd Jul 2026269 PMAQI
2nd Jul 20262410 PMAQI
2nd Jul 20262611 PMAQI
3rd Jul 20262812 AMAQI
3rd Jul 2026281 AMAQI
3rd Jul 2026302 AMAQI
3rd Jul 2026283 AMAQI
3rd Jul 2026284 AMAQI
3rd Jul 2026265 AMAQI

22°C13/30°C

3rd Jul 2026296 AMAQI
3rd Jul 2026267 AMAQI
3rd Jul 2026308 AMAQI
3rd Jul 2026239 AMAQI
3rd Jul 20263010 AMAQI
3rd Jul 20263211 AMAQI
3rd Jul 20263212 PMAQI
3rd Jul 2026341 PMAQI
3rd Jul 2026302 PMAQI
3rd Jul 2026283 PMAQI
3rd Jul 2026304 PMAQI
3rd Jul 2026305 PMAQI
3rd Jul 2026296 PMAQI
3rd Jul 2026307 PMAQI
3rd Jul 2026278 PMAQI
3rd Jul 2026269 PMAQI
3rd Jul 20262810 PMAQI
3rd Jul 20262411 PMAQI
4th Jul 20262812 AMAQI
4th Jul 2026281 AMAQI
4th Jul 2026302 AMAQI
4th Jul 2026423 AMAQI
4th Jul 2026284 AMAQI
4th Jul 2026265 AMAQI

22°C15/29°C

4th Jul 2026286 AMAQI
4th Jul 2026267 AMAQI
4th Jul 2026268 AMAQI
4th Jul 2026269 AMAQI
4th Jul 20262610 AMAQI
4th Jul 20262811 AMAQI
4th Jul 20263012 PMAQI
4th Jul 2026241 PMAQI
4th Jul 2026262 PMAQI
4th Jul 2026243 PMAQI
4th Jul 2026244 PMAQI
4th Jul 2026245 PMAQI
4th Jul 2026266 PMAQI
4th Jul 2026267 PMAQI
4th Jul 2026208 PMAQI
4th Jul 2026229 PMAQI
4th Jul 20262010 PMAQI
4th Jul 20262011 PMAQI
5th Jul 20262012 AMAQI
5th Jul 2026241 AMAQI
5th Jul 2026492 AMAQI
5th Jul 2026593 AMAQI
5th Jul 2026554 AMAQI
5th Jul 2026515 AMAQI

21°C14/28°C

5th Jul 2026426 AMAQI
5th Jul 2026387 AMAQI
5th Jul 2026368 AMAQI
5th Jul 2026389 AMAQI
5th Jul 20264610 AMAQI
5th Jul 20264211 AMAQI
5th Jul 20263212 PMAQI
5th Jul 2026281 PMAQI
5th Jul 2026282 PMAQI
5th Jul 2026273 PMAQI
5th Jul 2026264 PMAQI
5th Jul 2026285 PMAQI
5th Jul 2026276 PMAQI
5th Jul 2026267 PMAQI
5th Jul 2026228 PMAQI
5th Jul 2026389 PMAQI
5th Jul 20261710 PMAQI
5th Jul 20262211 PMAQI
6th Jul 20262512 AMAQI
6th Jul 2026271 AMAQI
6th Jul 2026262 AMAQI
6th Jul 2026283 AMAQI
6th Jul 2026234 AMAQI
6th Jul 2026215 AMAQI

20°C13/28°C

6th Jul 2026246 AMAQI
6th Jul 2026287 AMAQI
6th Jul 2026298 AMAQI
6th Jul 2026309 AMAQI
6th Jul 20263210 AMAQI
6th Jul 20263211 AMAQI
6th Jul 20264812 PMAQI
6th Jul 2026621 PMAQI
6th Jul 2026472 PMAQI
6th Jul 2026443 PMAQI
6th Jul 2026384 PMAQI
6th Jul 2026325 PMAQI
6th Jul 2026286 PMAQI
6th Jul 2026317 PMAQI
6th Jul 2026288 PMAQI
6th Jul 2026269 PMAQI
6th Jul 20262410 PMAQI
6th Jul 20262811 PMAQI
7th Jul 20262412 AMAQI
7th Jul 2026261 AMAQI
7th Jul 2026332 AMAQI
7th Jul 2026283 AMAQI
7th Jul 2026304 AMAQI
7th Jul 2026245 AMAQI

19°C12/28°C

7th Jul 2026306 AMAQI
7th Jul 2026307 AMAQI
7th Jul 2026308 AMAQI
7th Jul 2026309 AMAQI
7th Jul 20262710 AMAQI
7th Jul 20263311 AMAQI
7th Jul 20263412 PMAQI
7th Jul 2026321 PMAQI
7th Jul 2026322 PMAQI
7th Jul 2026303 PMAQI
7th Jul 2026304 PMAQI
7th Jul 2026325 PMAQI
7th Jul 2026306 PMAQI
7th Jul 2026327 PMAQI
7th Jul 2026288 PMAQI
7th Jul 2026309 PMAQI
7th Jul 20262610 PMAQI
7th Jul 20262811 PMAQI
8th Jul 20262612 AMAQI
8th Jul 2026241 AMAQI
8th Jul 2026282 AMAQI
8th Jul 2026303 AMAQI
8th Jul 2026274 AMAQI
8th Jul 2026245 AMAQI

23°C14/31°C

8th Jul 2026226 AMAQI
8th Jul 2026227 AMAQI
8th Jul 2026248 AMAQI
8th Jul 2026259 AMAQI
8th Jul 20262810 AMAQI
8th Jul 20263211 AMAQI
8th Jul 20263212 PMAQI
8th Jul 2026341 PMAQI
8th Jul 2026312 PMAQI
8th Jul 2026283 PMAQI
8th Jul 2026304 PMAQI
8th Jul 2026285 PMAQI
8th Jul 2026306 PMAQI
8th Jul 2026287 PMAQI
8th Jul 2026248 PMAQI
8th Jul 2026269 PMAQI
8th Jul 20262410 PMAQI
8th Jul 20262411 PMAQI
9th Jul 20262212 AMAQI
9th Jul 2026241 AMAQI
9th Jul 2026282 AMAQI
9th Jul 2026283 AMAQI
9th Jul 2026284 AMAQI
9th Jul 2026285 AMAQI

23°C19/29°C

9th Jul 2026286 AMAQI
9th Jul 2026297 AMAQI
9th Jul 2026278 AMAQI
9th Jul 2026309 AMAQI
9th Jul 20263010 AMAQI
9th Jul 20263011 AMAQI
9th Jul 20263212 PMAQI
9th Jul 2026301 PMAQI
9th Jul 2026302 PMAQI
9th Jul 2026293 PMAQI
9th Jul 2026304 PMAQI
9th Jul 2026305 PMAQI
9th Jul 2026326 PMAQI
9th Jul 2026307 PMAQI
9th Jul 2026348 PMAQI
9th Jul 2026309 PMAQI
9th Jul 20262910 PMAQI
9th Jul 20262811 PMAQI
10th Jul 20262612 AMAQI
10th Jul 2026241 AMAQI
10th Jul 2026242 AMAQI
10th Jul 2026263 AMAQI
10th Jul 2026304 AMAQI
10th Jul 2026325 AMAQI

21°C13/30°C

10th Jul 2026346 AMAQI
10th Jul 2026327 AMAQI
10th Jul 2026348 AMAQI
10th Jul 2026329 AMAQI
10th Jul 20263810 AMAQI
10th Jul 20263811 AMAQI
10th Jul 20263412 PMAQI
10th Jul 2026341 PMAQI
10th Jul 2026342 PMAQI
10th Jul 2026323 PMAQI
10th Jul 2026364 PMAQI
10th Jul 2026325 PMAQI
10th Jul 2026366 PMAQI
10th Jul 2026367 PMAQI
10th Jul 2026368 PMAQI
10th Jul 2026389 PMAQI
10th Jul 20263110 PMAQI
10th Jul 20262911 PMAQI
11th Jul 20262812 AMAQI
11th Jul 2026261 AMAQI
11th Jul 2026262 AMAQI
11th Jul 2026263 AMAQI
11th Jul 2026344 AMAQI
11th Jul 2026315 AMAQI

21°C13/31°C

11th Jul 2026316 AMAQI
11th Jul 2026287 AMAQI
11th Jul 2026328 AMAQI
11th Jul 2026349 AMAQI
11th Jul 20263410 AMAQI
11th Jul 20263411 AMAQI
11th Jul 20263212 PMAQI
11th Jul 2026341 PMAQI
11th Jul 2026362 PMAQI
11th Jul 2026323 PMAQI
11th Jul 2026304 PMAQI
11th Jul 2026325 PMAQI
11th Jul 2026306 PMAQI
11th Jul 2026327 PMAQI
11th Jul 2026348 PMAQI
11th Jul 2026319 PMAQI
11th Jul 20263010 PMAQI
11th Jul 20262811 PMAQI
12th Jul 20262412 AMAQI
12th Jul 2026261 AMAQI
12th Jul 2026242 AMAQI
12th Jul 2026283 AMAQI
12th Jul 2026304 AMAQI
12th Jul 2026295 AMAQI

21°C13/30°C

12th Jul 2026306 AMAQI
12th Jul 2026307 AMAQI
12th Jul 2026348 AMAQI
12th Jul 2026329 AMAQI
12th Jul 20263010 AMAQI
12th Jul 20263011 AMAQI
12th Jul 20263212 PMAQI
12th Jul 2026321 PMAQI
12th Jul 2026322 PMAQI
12th Jul 2026313 PMAQI
12th Jul 2026304 PMAQI
12th Jul 2026485 PMAQI
12th Jul 2026486 PMAQI
12th Jul 2026337 PMAQI
12th Jul 2026328 PMAQI
12th Jul 2026309 PMAQI
12th Jul 20262910 PMAQI
12th Jul 20263311 PMAQI
13th Jul 20263312 AMAQI
13th Jul 2026221 AMAQI
13th Jul 2026272 AMAQI
13th Jul 2026263 AMAQI
13th Jul 2026344 AMAQI
13th Jul 2026305 AMAQI

22°C14/33°C

13th Jul 2026316 AMAQI
13th Jul 2026367 AMAQI
13th Jul 2026388 AMAQI
13th Jul 2026349 AMAQI
13th Jul 20263410 AMAQI
13th Jul 20264611 AMAQI
13th Jul 20265012 PMAQI
13th Jul 2026441 PMAQI
13th Jul 2026322 PMAQI
13th Jul 2026303 PMAQI
13th Jul 2026304 PMAQI
13th Jul 2026305 PMAQI
13th Jul 2026316 PMAQI
13th Jul 2026257 PMAQI
13th Jul 2026428 PMAQI
13th Jul 2026429 PMAQI
13th Jul 20263810 PMAQI
13th Jul 20264211 PMAQI
14th Jul 20262612 AMAQI
14th Jul 2026281 AMAQI
14th Jul 2026422 AMAQI
14th Jul 2026463 AMAQI
14th Jul 2026484 AMAQI
14th Jul 2026485 AMAQI

30°C17/41°C

14th Jul 2026326 AMAQI
14th Jul 2026347 AMAQI
14th Jul 2026308 AMAQI
14th Jul 2026259 AMAQI
14th Jul 20263610 AMAQI
14th Jul 20263811 AMAQI
14th Jul 20264012 PMAQI
14th Jul 2026341 PMAQI
14th Jul 2026342 PMAQI
14th Jul 2026373 PMAQI
14th Jul 2026304 PMAQI
14th Jul 2026305 PMAQI
14th Jul 2026296 PMAQI
14th Jul 2026327 PMAQI
14th Jul 2026408 PMAQI
14th Jul 2026339 PMAQI
14th Jul 20262610 PMAQI
14th Jul 20262411 PMAQI
15th Jul 20262012 AMAQI
15th Jul 2026201 AMAQI
15th Jul 2026382 AMAQI
15th Jul 2026943 AMAQI
15th Jul 2026504 AMAQI
15th Jul 2026265 AMAQI

30°C24/37°C

15th Jul 2026286 AMAQI
15th Jul 2026447 AMAQI
15th Jul 20261038 AMAQI
15th Jul 2026679 AMAQI
15th Jul 20265210 AMAQI
15th Jul 20266611 AMAQI
15th Jul 20264212 PMAQI
15th Jul 2026741 PMAQI
15th Jul 2026682 PMAQI
15th Jul 2026553 PMAQI
15th Jul 2026424 PMAQI
15th Jul 2026875 PMAQI
15th Jul 2026866 PMAQI
15th Jul 2026887 PMAQI
15th Jul 2026928 PMAQI
15th Jul 2026959 PMAQI
15th Jul 20268610 PMAQI
15th Jul 20268411 PMAQI
16th Jul 20267812 AMAQI
16th Jul 2026781 AMAQI
16th Jul 2026742 AMAQI
16th Jul 2026743 AMAQI
16th Jul 2026784 AMAQI
16th Jul 2026885 AMAQI

25°C18/32°C

16th Jul 2026856 AMAQI
16th Jul 2026847 AMAQI
16th Jul 2026888 AMAQI
16th Jul 2026849 AMAQI
16th Jul 20268610 AMAQI
16th Jul 20269011 AMAQI
16th Jul 20268612 PMAQI
16th Jul 2026871 PMAQI
16th Jul 2026612 PMAQI
16th Jul 20261343 PMAQI
16th Jul 2026864 PMAQI
16th Jul 2026905 PMAQI
16th Jul 2026866 PMAQI
16th Jul 2026777 PMAQI
16th Jul 2026828 PMAQI
16th Jul 2026969 PMAQI
16th Jul 20268010 PMAQI
16th Jul 20268211 PMAQI
17th Jul 20267612 AMAQI
17th Jul 2026801 AMAQI
17th Jul 2026762 AMAQI
17th Jul 2026663 AMAQI
17th Jul 2026664 AMAQI
17th Jul 2026715 AMAQI

22°C15/29°C

17th Jul 2026666 AMAQI
17th Jul 2026747 AMAQI
17th Jul 2026728 AMAQI
17th Jul 2026749 AMAQI
17th Jul 20267610 AMAQI
17th Jul 20268011 AMAQI
17th Jul 20268012 PMAQI
17th Jul 20263141 PMAQI
17th Jul 20262042 PMAQI
17th Jul 20261863 PMAQI
17th Jul 20261944 PMAQI
17th Jul 20261835 PMAQI
17th Jul 20261976 PMAQI
17th Jul 20261567 PMAQI
17th Jul 20261698 PMAQI
17th Jul 20261749 PMAQI
17th Jul 202614610 PMAQI
17th Jul 202614811 PMAQI
18th Jul 202615012 AMAQI
18th Jul 20261361 AMAQI
18th Jul 20261362 AMAQI
18th Jul 20261263 AMAQI
18th Jul 20261254 AMAQI
18th Jul 20261225 AMAQI

18°C16/21°C

18th Jul 20261266 AMAQI
18th Jul 20261287 AMAQI
18th Jul 2026648 AMAQI
18th Jul 2026619 AMAQI
18th Jul 20266610 AMAQI
18th Jul 20267011 AMAQI
18th Jul 20269812 PMAQI
18th Jul 20261121 PMAQI
18th Jul 20261292 PMAQI
18th Jul 20261403 PMAQI
18th Jul 20261404 PMAQI
18th Jul 20261325 PMAQI
18th Jul 20261206 PMAQI
18th Jul 20261097 PMAQI
18th Jul 20261038 PMAQI
18th Jul 2026989 PMAQI
18th Jul 202613910 PMAQI
18th Jul 202614511 PMAQI
19th Jul 202615212 AMAQI
19th Jul 20261601 AMAQI
19th Jul 20261522 AMAQI
19th Jul 20261463 AMAQI
19th Jul 20261504 AMAQI
19th Jul 20261485 AMAQI

21°C16/27°C

19th Jul 20261506 AMAQI
19th Jul 20261457 AMAQI
19th Jul 20261448 AMAQI
19th Jul 20261499 AMAQI
19th Jul 202611310 AMAQI
19th Jul 202613411 AMAQI
19th Jul 202613312 PMAQI
19th Jul 2026981 PMAQI
19th Jul 20261302 PMAQI
19th Jul 20261243 PMAQI
19th Jul 20261204 PMAQI
19th Jul 2026615 PMAQI
19th Jul 2026606 PMAQI
19th Jul 2026577 PMAQI
19th Jul 2026568 PMAQI
19th Jul 2026569 PMAQI
19th Jul 20265610 PMAQI
19th Jul 20265911 PMAQI
20th Jul 20266412 AMAQI
20th Jul 20261221 AMAQI
20th Jul 20261232 AMAQI
20th Jul 2026683 AMAQI
20th Jul 2026824 AMAQI
20th Jul 2026855 AMAQI

20°C13/28°C

20th Jul 2026966 AMAQI
20th Jul 2026997 AMAQI
20th Jul 20261008 AMAQI
20th Jul 20261029 AMAQI
20th Jul 20269410 AMAQI
20th Jul 20269011 AMAQI
20th Jul 20268212 PMAQI
20th Jul 2026811 PMAQI
20th Jul 2026802 PMAQI
20th Jul 2026803 PMAQI
20th Jul 2026794 PMAQI
20th Jul 2026745 PMAQI
20th Jul 2026726 PMAQI
20th Jul 2026667 PMAQI
20th Jul 2026648 PMAQI
20th Jul 2026559 PMAQI
20th Jul 20266210 PMAQI
21st Jul 20265812 AMAQI
21st Jul 2026541 AMAQI
21st Jul 2026542 AMAQI
21st Jul 2026513 AMAQI
21st Jul 2026404 AMAQI
21st Jul 2026365 AMAQI

22°C15/31°C

21st Jul 2026626 AMAQI
21st Jul 2026367 AMAQI
21st Jul 2026418 AMAQI
21st Jul 2026489 AMAQI
21st Jul 20265110 AMAQI
21st Jul 20265111 AMAQI
21st Jul 20265312 PMAQI
21st Jul 2026421 PMAQI
21st Jul 2026422 PMAQI
21st Jul 2026483 PMAQI
21st Jul 2026584 PMAQI
21st Jul 2026405 PMAQI
21st Jul 2026396 PMAQI
21st Jul 2026327 PMAQI
21st Jul 2026368 PMAQI
21st Jul 2026309 PMAQI
21st Jul 20262510 PMAQI
21st Jul 20263511 PMAQI
22nd Jul 20263212 AMAQI
22nd Jul 2026361 AMAQI
22nd Jul 2026342 AMAQI
22nd Jul 2026323 AMAQI
22nd Jul 2026374 AMAQI
22nd Jul 2026435 AMAQI

17°C14/20°C

22nd Jul 2026416 AMAQI
22nd Jul 2026387 AMAQI
22nd Jul 2026348 AMAQI
22nd Jul 2026329 AMAQI
22nd Jul 20263010 AMAQI
22nd Jul 20262611 AMAQI
22nd Jul 20262212 PMAQI
22nd Jul 2026241 PMAQI
22nd Jul 2026202 PMAQI
22nd Jul 2026223 PMAQI
22nd Jul 2026224 PMAQI
22nd Jul 2026235 PMAQI
22nd Jul 2026256 PMAQI
22nd Jul 2026267 PMAQI
22nd Jul 2026288 PMAQI
22nd Jul 2026479 PMAQI
22nd Jul 20264510 PMAQI
22nd Jul 20263211 PMAQI
23rd Jul 20262612 AMAQI
23rd Jul 2026301 AMAQI
23rd Jul 2026222 AMAQI
23rd Jul 2026223 AMAQI
23rd Jul 2026254 AMAQI
23rd Jul 2026345 AMAQI

18°C10/24°C

23rd Jul 2026266 AMAQI
23rd Jul 2026327 AMAQI
23rd Jul 2026388 AMAQI
23rd Jul 2026409 AMAQI
23rd Jul 20264310 AMAQI
23rd Jul 20264611 AMAQI
23rd Jul 20263412 PMAQI
23rd Jul 2026461 PMAQI
23rd Jul 2026602 PMAQI
23rd Jul 2026643 PMAQI
23rd Jul 2026614 PMAQI
23rd Jul 2026865 PMAQI
23rd Jul 2026746 PMAQI
23rd Jul 2026807 PMAQI
23rd Jul 2026748 PMAQI
23rd Jul 2026449 PMAQI
23rd Jul 20263210 PMAQI
23rd Jul 20263711 PMAQI
24th Jul 20263212 AMAQI
24th Jul 2026311 AMAQI
24th Jul 2026372 AMAQI
24th Jul 2026433 AMAQI
24th Jul 2026474 AMAQI
24th Jul 2026455 AMAQI

22°C15/31°C

24th Jul 2026546 AMAQI
24th Jul 2026537 AMAQI
24th Jul 2026538 AMAQI
24th Jul 2026589 AMAQI
24th Jul 20266010 AMAQI
24th Jul 20266211 AMAQI
24th Jul 20266912 PMAQI
24th Jul 2026451 PMAQI
24th Jul 2026362 PMAQI
24th Jul 2026343 PMAQI
24th Jul 2026334 PMAQI
24th Jul 2026335 PMAQI
24th Jul 2026426 PMAQI
24th Jul 2026397 PMAQI
24th Jul 2026418 PMAQI
24th Jul 2026449 PMAQI
24th Jul 20264210 PMAQI
24th Jul 20264111 PMAQI
25th Jul 20264312 AMAQI
25th Jul 2026411 AMAQI
25th Jul 2026342 AMAQI
25th Jul 2026323 AMAQI
25th Jul 2026364 AMAQI
25th Jul 2026345 AMAQI

23°C15/31°C

25th Jul 2026346 AMAQI
25th Jul 2026407 AMAQI
25th Jul 2026468 AMAQI
25th Jul 2026439 AMAQI
25th Jul 20264610 AMAQI
25th Jul 20265011 AMAQI
25th Jul 20265012 PMAQI
25th Jul 2026441 PMAQI
25th Jul 2026432 PMAQI
25th Jul 2026463 PMAQI
25th Jul 2026444 PMAQI
25th Jul 2026445 PMAQI
25th Jul 2026476 PMAQI
25th Jul 2026457 PMAQI
25th Jul 2026418 PMAQI
25th Jul 2026439 PMAQI
25th Jul 20264610 PMAQI
25th Jul 20264211 PMAQI
26th Jul 20264512 AMAQI
26th Jul 2026441 AMAQI
26th Jul 2026442 AMAQI
26th Jul 2026423 AMAQI
26th Jul 2026424 AMAQI
26th Jul 2026425 AMAQI

24°C19/32°C

26th Jul 2026426 AMAQI
26th Jul 2026407 AMAQI
26th Jul 2026428 AMAQI
26th Jul 2026389 AMAQI
26th Jul 20264010 AMAQI
26th Jul 20264211 AMAQI
26th Jul 20264412 PMAQI
26th Jul 2026441 PMAQI
26th Jul 2026422 PMAQI
26th Jul 2026413 PMAQI
26th Jul 2026404 PMAQI
26th Jul 2026405 PMAQI
26th Jul 2026436 PMAQI
26th Jul 2026407 PMAQI
26th Jul 2026418 PMAQI
26th Jul 2026449 PMAQI
26th Jul 20264010 PMAQI
26th Jul 20264611 PMAQI
27th Jul 20264812 AMAQI
27th Jul 2026451 AMAQI
27th Jul 2026482 AMAQI
27th Jul 2026493 AMAQI
27th Jul 2026464 AMAQI
27th Jul 2026465 AMAQI

20°C15/29°C

27th Jul 2026516 AMAQI
27th Jul 2026507 AMAQI
27th Jul 2026428 AMAQI
27th Jul 2026449 AMAQI
27th Jul 20264310 AMAQI
27th Jul 20264411 AMAQI
27th Jul 20264412 PMAQI
27th Jul 2026421 PMAQI
27th Jul 2026362 PMAQI
27th Jul 2026403 PMAQI
27th Jul 2026344 PMAQI
27th Jul 2026345 PMAQI
27th Jul 2026436 PMAQI
27th Jul 2026427 PMAQI
27th Jul 2026488 PMAQI
27th Jul 2026369 PMAQI
27th Jul 20263810 PMAQI
27th Jul 20263911 PMAQI
28th Jul 20264412 AMAQI
28th Jul 2026381 AMAQI
28th Jul 2026362 AMAQI
28th Jul 2026343 AMAQI
28th Jul 2026324 AMAQI
28th Jul 2026305 AMAQI

18°C14/25°C

28th Jul 2026326 AMAQI
28th Jul 2026327 AMAQI
28th Jul 2026308 AMAQI
28th Jul 2026319 AMAQI
28th Jul 20262810 AMAQI
28th Jul 20263511 AMAQI
28th Jul 20263612 PMAQI
28th Jul 2026421 PMAQI
28th Jul 2026422 PMAQI
28th Jul 2026523 PMAQI
28th Jul 2026444 PMAQI
28th Jul 2026385 PMAQI
28th Jul 2026476 PMAQI
28th Jul 2026567 PMAQI
28th Jul 2026488 PMAQI
28th Jul 2026469 PMAQI
28th Jul 20263510 PMAQI
28th Jul 20263811 PMAQI
29th Jul 20264612 AMAQI
29th Jul 2026341 AMAQI
29th Jul 2026382 AMAQI
29th Jul 2026383 AMAQI
29th Jul 2026324 AMAQI
29th Jul 2026305 AMAQI

20°C12/29°C

29th Jul 2026286 AMAQI
29th Jul 2026307 AMAQI
29th Jul 2026218 AMAQI
29th Jul 2026239 AMAQI
29th Jul 20262710 AMAQI
29th Jul 20263411 AMAQI
29th Jul 20263412 PMAQI
29th Jul 2026381 PMAQI
29th Jul 2026412 PMAQI
29th Jul 2026453 PMAQI
29th Jul 2026444 PMAQI
29th Jul 2026475 PMAQI
29th Jul 2026566 PMAQI
29th Jul 2026567 PMAQI
29th Jul 2026568 PMAQI
29th Jul 2026549 PMAQI
29th Jul 20265210 PMAQI
29th Jul 20265011 PMAQI
30th Jul 20265112 AMAQI
30th Jul 2026541 AMAQI
30th Jul 2026502 AMAQI
30th Jul 2026513 AMAQI
30th Jul 2026574 AMAQI
30th Jul 2026485 AMAQI

24°C14/34°C

30th Jul 2026486 AMAQI
6 AM
30th Jul 2026477 AMAQI
30th Jul 2026448 AMAQI
30th Jul 2026469 AMAQI
30th Jul 20265010 AMAQI
30th Jul 20265011 AMAQI
30th Jul 20265012 PMAQI
30th Jul 2026501 PMAQI
1 PM
30th Jul 2026532 PMAQI
30th Jul 2026523 PMAQI
30th Jul 2026524 PMAQI
30th Jul 2026545 PMAQI
30th Jul 2026516 PMAQI
30th Jul 2026497 PMAQI
30th Jul 2026498 PMAQI
30th Jul 2026529 PMAQI
9 PM
30th Jul 20264810 PMAQI
30th Jul 20264811 PMAQI
1 AM
5 AM

22°C16/31°C

Day time
Avg. Highest Time
1 PM

55AQI

1 hours / Day
30 hours / Month
Avg. Lowest Time
6 AM - 10 AM

46AQI

5 hours / Day
150 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 1 PM to 1 PM (Avg. 55), while the lowest AQI was between 6 AM to 10 AM (Avg. 46).
Night time
Avg. Highest Time
2 AM - 11 PM

46AQI

6 hours / Day
180 hours / Month
Avg. Lowest Time
12 AM - 1 AM

45AQI

2 hours / Day
60 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 2 AM to 11 PM (Avg. 46), while the lowest AQI was between 12 AM to 1 AM (Avg. 45).

2026 Days Vs Air Quality

Thunder Bay, Ontario, Canada

2026

91%

189

8%

16

1%

3

Total number of days with different AQI categories in last 211 days in 2026 (154 days remaining)

Good
189 Days
Moderate
16 Days
Poor
3 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 91%

Health Risk Level:

Very Low

In 2026, 91% of 211 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

Thunder Bay, Ontario, Canada

AQI levels in 2026

AQI (US)
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 2026
-1th undefined 2026
-1th undefined 2026
-1th undefined 2026
1st January 2026
19AQI (US)
2nd January 2026
14AQI (US)
3rd January 2026
16AQI (US)
4th January 2026
26AQI (US)
5th January 2026
31AQI (US)
6th January 2026
41AQI (US)
7th January 2026
23AQI (US)
8th January 2026
48AQI (US)
9th January 2026
26AQI (US)
10th January 2026
19AQI (US)
11th January 2026
10AQI (US)
12th January 2026
17AQI (US)
13th January 2026
26AQI (US)
14th January 2026
16AQI (US)
15th January 2026
17AQI (US)
16th January 2026
20AQI (US)
17th January 2026
10AQI (US)
18th January 2026
11AQI (US)
19th January 2026
12AQI (US)
20th January 2026
14AQI (US)
21st January 2026
28AQI (US)
22nd January 2026
54AQI (US)
23rd January 2026
60AQI (US)
24th January 2026
50AQI (US)
25th January 2026
52AQI (US)
26th January 2026
48AQI (US)
27th January 2026
35AQI (US)
28th January 2026
43AQI (US)
29th January 2026
48AQI (US)
30th January 2026
51AQI (US)
31st January 2026
40AQI (US)
1st February 2026
50AQI (US)
2nd February 2026
54AQI (US)
3rd February 2026
49AQI (US)
4th February 2026
46AQI (US)
5th February 2026
52AQI (US)
6th February 2026
46AQI (US)
7th February 2026
35AQI (US)
8th February 2026
41AQI (US)
9th February 2026
46AQI (US)
10th February 2026
47AQI (US)
11th February 2026
37AQI (US)
12th February 2026
36AQI (US)
13th February 2026
50AQI (US)
14th February 2026
48AQI (US)
15th February 2026
46AQI (US)
16th February 2026
42AQI (US)
17th February 2026
46AQI (US)
18th February 2026
42AQI (US)
19th February 2026
42AQI (US)
20th February 2026
39AQI (US)
21st February 2026
37AQI (US)
22nd February 2026
35AQI (US)
23rd February 2026
35AQI (US)
24th February 2026
40AQI (US)
25th February 2026
36AQI (US)
26th February 2026
34AQI (US)
27th February 2026
33AQI (US)
28th February 2026
34AQI (US)
1st March 2026
35AQI (US)
2nd March 2026
50AQI (US)
3rd March 2026
42AQI (US)
4th March 2026
44AQI (US)
5th March 2026
42AQI (US)
6th March 2026
35AQI (US)
7th March 2026
44AQI (US)
8th March 2026
38AQI (US)
9th March 2026
38AQI (US)
10th March 2026
37AQI (US)
11th March 2026
40AQI (US)
12th March 2026
38AQI (US)
13th March 2026
40AQI (US)
14th March 2026
37AQI (US)
15th March 2026
31AQI (US)
16th March 2026
33AQI (US)
17th March 2026
34AQI (US)
18th March 2026
30AQI (US)
19th March 2026
37AQI (US)
20th March 2026
44AQI (US)
21st March 2026
43AQI (US)
22nd March 2026
34AQI (US)
23rd March 2026
40AQI (US)
24th March 2026
36AQI (US)
25th March 2026
32AQI (US)
26th March 2026
30AQI (US)
27th March 2026
27AQI (US)
28th March 2026
29AQI (US)
29th March 2026
29AQI (US)
30th March 2026
27AQI (US)
31st March 2026
26AQI (US)
1st April 2026
27AQI (US)
2nd April 2026
30AQI (US)
3rd April 2026
28AQI (US)
4th April 2026
29AQI (US)
5th April 2026
27AQI (US)
6th April 2026
27AQI (US)
7th April 2026
26AQI (US)
8th April 2026
28AQI (US)
9th April 2026
27AQI (US)
10th April 2026
32AQI (US)
11th April 2026
32AQI (US)
12th April 2026
29AQI (US)
13th April 2026
33AQI (US)
14th April 2026
32AQI (US)
15th April 2026
33AQI (US)
16th April 2026
29AQI (US)
17th April 2026
18th April 2026
27AQI (US)
19th April 2026
32AQI (US)
20th April 2026
28AQI (US)
21st April 2026
27AQI (US)
22nd April 2026
23rd April 2026
23AQI (US)
24th April 2026
24AQI (US)
25th April 2026
28AQI (US)
26th April 2026
34AQI (US)
27th April 2026
27AQI (US)
28th April 2026
24AQI (US)
29th April 2026
23AQI (US)
30th April 2026
27AQI (US)
1st May 2026
26AQI (US)
2nd May 2026
25AQI (US)
3rd May 2026
20AQI (US)
4th May 2026
34AQI (US)
5th May 2026
36AQI (US)
6th May 2026
29AQI (US)
7th May 2026
25AQI (US)
8th May 2026
31AQI (US)
9th May 2026
10th May 2026
31AQI (US)
11th May 2026
26AQI (US)
12th May 2026
24AQI (US)
13th May 2026
25AQI (US)
14th May 2026
21AQI (US)
15th May 2026
50AQI (US)
16th May 2026
67AQI (US)
17th May 2026
56AQI (US)
18th May 2026
57AQI (US)
19th May 2026
55AQI (US)
20th May 2026
52AQI (US)
21st May 2026
45AQI (US)
22nd May 2026
39AQI (US)
23rd May 2026
46AQI (US)
24th May 2026
43AQI (US)
25th May 2026
41AQI (US)
26th May 2026
33AQI (US)
27th May 2026
28AQI (US)
28th May 2026
22AQI (US)
29th May 2026
24AQI (US)
30th May 2026
24AQI (US)
31st May 2026
29AQI (US)
1st June 2026
32AQI (US)
2nd June 2026
31AQI (US)
3rd June 2026
28AQI (US)
4th June 2026
26AQI (US)
5th June 2026
44AQI (US)
6th June 2026
37AQI (US)
7th June 2026
32AQI (US)
8th June 2026
26AQI (US)
9th June 2026
33AQI (US)
10th June 2026
29AQI (US)
11th June 2026
32AQI (US)
12th June 2026
26AQI (US)
13th June 2026
21AQI (US)
14th June 2026
22AQI (US)
15th June 2026
25AQI (US)
16th June 2026
27AQI (US)
17th June 2026
28AQI (US)
18th June 2026
27AQI (US)
19th June 2026
22AQI (US)
20th June 2026
23AQI (US)
21st June 2026
20AQI (US)
22nd June 2026
24AQI (US)
23rd June 2026
24AQI (US)
24th June 2026
24AQI (US)
25th June 2026
22AQI (US)
26th June 2026
34AQI (US)
27th June 2026
58AQI (US)
28th June 2026
56AQI (US)
29th June 2026
39AQI (US)
30th June 2026
28AQI (US)
1st July 2026
27AQI (US)
2nd July 2026
27AQI (US)
3rd July 2026
29AQI (US)
4th July 2026
26AQI (US)
5th July 2026
34AQI (US)
6th July 2026
32AQI (US)
7th July 2026
30AQI (US)
8th July 2026
27AQI (US)
9th July 2026
29AQI (US)
10th July 2026
32AQI (US)
11th July 2026
31AQI (US)
12th July 2026
32AQI (US)
13th July 2026
34AQI (US)
14th July 2026
34AQI (US)
15th July 2026
63AQI (US)
16th July 2026
84AQI (US)
17th July 2026
126AQI (US)
18th July 2026
116AQI (US)
19th July 2026
114AQI (US)
20th July 2026
84AQI (US)
21st July 2026
44AQI (US)
22nd July 2026
32AQI (US)
23rd July 2026
45AQI (US)
24th July 2026
44AQI (US)
25th July 2026
42AQI (US)
26th July 2026
42AQI (US)
27th July 2026
43AQI (US)
28th July 2026
38AQI (US)
29th July 2026
40AQI (US)
30th July 2026
50AQI (US)
31st July 2026
1st August 2026
2nd August 2026
3rd August 2026
4th August 2026
5th August 2026
6th August 2026
7th August 2026
8th August 2026
9th August 2026
10th August 2026
11th August 2026
12th August 2026
13th August 2026
14th August 2026
15th August 2026
16th August 2026
17th August 2026
18th August 2026
19th August 2026
20th August 2026
21st August 2026
22nd August 2026
23rd August 2026
24th August 2026
25th August 2026
26th August 2026
27th August 2026
28th August 2026
29th August 2026
30th August 2026
31st August 2026
1st September 2026
2nd September 2026
3rd September 2026
4th September 2026
5th September 2026
6th September 2026
7th September 2026
8th September 2026
9th September 2026
10th September 2026
11th September 2026
12th September 2026
13th September 2026
14th September 2026
15th September 2026
16th September 2026
17th September 2026
18th September 2026
19th September 2026
20th September 2026
21st September 2026
22nd September 2026
23rd September 2026
24th September 2026
25th September 2026
26th September 2026
27th September 2026
28th September 2026
29th September 2026
30th September 2026
1st October 2026
2nd October 2026
3rd October 2026
4th October 2026
5th October 2026
6th October 2026
7th October 2026
8th October 2026
9th October 2026
10th October 2026
11th October 2026
12th October 2026
13th October 2026
14th October 2026
15th October 2026
16th October 2026
17th October 2026
18th October 2026
19th October 2026
20th October 2026
21st October 2026
22nd October 2026
23rd October 2026
24th October 2026
25th October 2026
26th October 2026
27th October 2026
28th October 2026
29th October 2026
30th October 2026
31st October 2026
1st November 2026
2nd November 2026
3rd November 2026
4th November 2026
5th November 2026
6th November 2026
7th November 2026
8th November 2026
9th November 2026
10th November 2026
11th November 2026
12th November 2026
13th November 2026
14th November 2026
15th November 2026
16th November 2026
17th November 2026
18th November 2026
19th November 2026
20th November 2026
21st November 2026
22nd November 2026
23rd November 2026
24th November 2026
25th November 2026
26th November 2026
27th November 2026
28th November 2026
29th November 2026
30th November 2026
1st December 2026
2nd December 2026
3rd December 2026
4th December 2026
5th December 2026
6th December 2026
7th December 2026
8th December 2026
9th December 2026
10th December 2026
11th December 2026
12th December 2026
13th December 2026
14th December 2026
15th December 2026
16th December 2026
17th December 2026
18th December 2026
19th December 2026
20th December 2026
21st December 2026
22nd December 2026
23rd December 2026
24th December 2026
25th December 2026
26th December 2026
27th December 2026
28th December 2026
29th December 2026
30th December 2026
31st December 2026

30AQI (US)

42AQI (US)

36AQI (US)

28AQI (US)

35AQI (US)

30AQI (US)

48AQI (US)

No. of days

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

202636AQI (US)

27
4
26
2
31
28
25
5
28
2
24
3
3
189
16
3

Highest AQI (US) recorded in

July

48AQI (US)

Lowest AQI (US) recorded in

April

28AQI (US)

202531AQI (US)

31
28
30
1
30
31
24
6
18
12
1
17
11
2
1
28
2
27
4
30
29
2
323
38
3
1

Highest AQI (US) recorded in

July

50AQI (US)

Lowest AQI (US) recorded in

May

21AQI (US)

202430AQI (US)

31
28
1
31
30
30
1
29
27
4
26
5
23
1
2
4
31
30
31
347
12
2
4

Highest AQI (US) recorded in

September

57AQI (US)

Lowest AQI (US) recorded in

November

18AQI (US)

202329AQI (US)

31
28
31
30
31
28
2
28
3
23
8
28
2
31
29
29
2
347
17

Highest AQI (US) recorded in

August

38AQI (US)

Lowest AQI (US) recorded in

October

20AQI (US)

202227AQI (US)

30
21
31
30
31
30
22
2
2
29
31
29
1
30
1
316
4

Highest AQI (US) recorded in

February

30AQI (US)

Lowest AQI (US) recorded in

September

21AQI (US)

202130AQI (US)

27
2
23
2
30
1
30
28
1
28
2
20
9
2
25
4
2
30
30
30
31
332
21
4

Highest AQI (US) recorded in

July

47AQI (US)

Lowest AQI (US) recorded in

October

20AQI (US)

202027AQI (US)

11
2
21
18
30
30
1
31
30
28
1
29
1
30
1
258
6

Highest AQI (US) recorded in

March

37AQI (US)

Lowest AQI (US) recorded in

August

22AQI (US)

Most & Least Polluted Years Over the Last 7 Years

Most Polluted Year Recorded
2026(Avg.)
36AQI (US)
Least Polluted Year Recorded
2020(Avg.)
27AQI (US)

Thunder Bay's annual 2026 AQI (US) (36) shows an average percentage change of 24.4% (worsened AQI (US)) compared to previous years: 2020 (27), 2021 (30), 2022 (27), 2023 (29), 2024 (30), 2025 (31).