Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Hamilton Downtown, Hamilton, 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

Hamilton Downtown, Hamilton, Ontario, Canada

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
3rd Aug 2023
75AQI
Lowest AQI recorded on
30th Aug 2023
19AQI

Same Day Analysis (3rd August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 2nd highest AQI at 66 of Moderate air quality, showing improvement over 2023 on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 2nd Aug - 3rd Aug 2025

Hamilton Downtown, Hamilton, Ontario, Canada

AQI
Day
Night
.

5 AM2nd Aug 2025

8 PM

4 AM3rd Aug 2025

Day time
Avg. Highest Time
7PM2nd Aug

48AQI

Avg. Lowest Time
7AM2nd Aug

24AQI

Night time
Avg. Highest Time
4AM3rd Aug

66AQI

Avg. Lowest Time
5AM2nd Aug

24AQI

In the last 24 hours,

Hamilton Downtown's AQI reached its highest point of 66 at 4 AM during the Night, while the lowest point, 24, was recorded at 7 AM during the Day between 2nd Aug and 3rd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Hamilton Downtown, Hamilton, Ontario, Canada

JulAug
04th - 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 - 03rd03rd
Day
Night
4th Jul 2025295 AMAQI
4th Jul 2025296 AMAQI
4th Jul 2025287 AMAQI
4th Jul 2025348 AMAQI
4th Jul 2025339 AMAQI
4th Jul 20253610 AMAQI
4th Jul 20253511 AMAQI
4th Jul 20253812 PMAQI
4th Jul 2025361 PMAQI
4th Jul 2025352 PMAQI
4th Jul 2025323 PMAQI
4th Jul 2025344 PMAQI
4th Jul 2025325 PMAQI
4th Jul 2025336 PMAQI
4th Jul 2025327 PMAQI
4th Jul 2025318 PMAQI
4th Jul 2025349 PMAQI
4th Jul 20253510 PMAQI
4th Jul 20253511 PMAQI
5th Jul 20253912 AMAQI
5th Jul 2025421 AMAQI
5th Jul 2025402 AMAQI
5th Jul 2025403 AMAQI
5th Jul 2025414 AMAQI

22°C14/29°C

5th Jul 2025425 AMAQI
5th Jul 2025406 AMAQI
5th Jul 2025417 AMAQI
5th Jul 2025378 AMAQI
5th Jul 2025339 AMAQI
5th Jul 20253710 AMAQI
5th Jul 20254411 AMAQI
5th Jul 20255012 PMAQI
5th Jul 2025601 PMAQI
5th Jul 2025532 PMAQI
5th Jul 2025543 PMAQI
5th Jul 2025504 PMAQI
5th Jul 2025435 PMAQI
5th Jul 2025456 PMAQI
5th Jul 2025457 PMAQI
5th Jul 2025488 PMAQI
5th Jul 2025469 PMAQI
5th Jul 20254210 PMAQI
5th Jul 20254311 PMAQI
6th Jul 20254312 AMAQI
6th Jul 2025481 AMAQI
6th Jul 2025522 AMAQI
6th Jul 2025513 AMAQI
6th Jul 2025494 AMAQI

25°C17/34°C

6th Jul 2025485 AMAQI
6th Jul 2025516 AMAQI
6th Jul 2025537 AMAQI
6th Jul 2025548 AMAQI
6th Jul 2025539 AMAQI
6th Jul 20255410 AMAQI
6th Jul 20255311 AMAQI
6th Jul 20255312 PMAQI
6th Jul 2025521 PMAQI
6th Jul 2025522 PMAQI
6th Jul 2025523 PMAQI
6th Jul 2025504 PMAQI
6th Jul 2025525 PMAQI
6th Jul 2025526 PMAQI
6th Jul 2025527 PMAQI
6th Jul 2025528 PMAQI
6th Jul 2025529 PMAQI
6th Jul 20255210 PMAQI
6th Jul 20255111 PMAQI
7th Jul 20255212 AMAQI
7th Jul 2025521 AMAQI
7th Jul 2025522 AMAQI
7th Jul 2025533 AMAQI
7th Jul 2025534 AMAQI

28°C21/36°C

7th Jul 2025525 AMAQI
7th Jul 2025526 AMAQI
7th Jul 2025527 AMAQI
7th Jul 2025518 AMAQI
7th Jul 2025529 AMAQI
7th Jul 20255210 AMAQI
7th Jul 20255111 AMAQI
7th Jul 20254312 PMAQI
7th Jul 2025361 PMAQI
7th Jul 2025382 PMAQI
7th Jul 2025373 PMAQI
7th Jul 2025404 PMAQI
7th Jul 2025455 PMAQI
7th Jul 2025466 PMAQI
7th Jul 2025467 PMAQI
7th Jul 2025448 PMAQI
7th Jul 2025469 PMAQI
7th Jul 20254510 PMAQI
7th Jul 20254611 PMAQI
8th Jul 20254212 AMAQI
8th Jul 2025441 AMAQI
8th Jul 2025422 AMAQI
8th Jul 2025303 AMAQI
8th Jul 2025284 AMAQI

25°C21/28°C

8th Jul 2025265 AMAQI
8th Jul 2025246 AMAQI
8th Jul 2025277 AMAQI
8th Jul 2025328 AMAQI
8th Jul 2025329 AMAQI
8th Jul 20253210 AMAQI
8th Jul 20253411 AMAQI
8th Jul 20253212 PMAQI
8th Jul 2025321 PMAQI
8th Jul 2025342 PMAQI
8th Jul 2025363 PMAQI
8th Jul 2025364 PMAQI
8th Jul 2025365 PMAQI
8th Jul 2025356 PMAQI
8th Jul 2025357 PMAQI
8th Jul 2025348 PMAQI
8th Jul 2025339 PMAQI
8th Jul 20253210 PMAQI
8th Jul 20253211 PMAQI
9th Jul 20253312 AMAQI
9th Jul 2025341 AMAQI
9th Jul 2025312 AMAQI
9th Jul 2025333 AMAQI
9th Jul 2025374 AMAQI

22°C19/27°C

9th Jul 2025395 AMAQI
9th Jul 2025416 AMAQI
9th Jul 2025407 AMAQI
9th Jul 2025388 AMAQI
9th Jul 2025409 AMAQI
9th Jul 20254410 AMAQI
9th Jul 20254511 AMAQI
9th Jul 20254612 PMAQI
9th Jul 2025441 PMAQI
9th Jul 2025472 PMAQI
9th Jul 2025483 PMAQI
9th Jul 2025444 PMAQI
9th Jul 2025425 PMAQI
9th Jul 2025406 PMAQI
9th Jul 2025437 PMAQI
9th Jul 2025428 PMAQI
9th Jul 2025389 PMAQI
9th Jul 20253810 PMAQI
9th Jul 20253911 PMAQI
10th Jul 20253612 AMAQI
10th Jul 2025371 AMAQI
10th Jul 2025272 AMAQI
10th Jul 2025343 AMAQI
10th Jul 2025344 AMAQI

22°C18/26°C

10th Jul 2025325 AMAQI
10th Jul 2025286 AMAQI
10th Jul 2025297 AMAQI
10th Jul 2025338 AMAQI
10th Jul 2025349 AMAQI
10th Jul 20253410 AMAQI
10th Jul 20253711 AMAQI
10th Jul 20253512 PMAQI
10th Jul 2025401 PMAQI
10th Jul 2025452 PMAQI
10th Jul 2025483 PMAQI
10th Jul 2025454 PMAQI
10th Jul 2025395 PMAQI
10th Jul 2025386 PMAQI
10th Jul 2025387 PMAQI
10th Jul 2025408 PMAQI
10th Jul 2025379 PMAQI
10th Jul 20253810 PMAQI
10th Jul 20253811 PMAQI
11th Jul 20254012 AMAQI
11th Jul 2025401 AMAQI
11th Jul 2025562 AMAQI
11th Jul 2025543 AMAQI
11th Jul 2025554 AMAQI

24°C18/29°C

11th Jul 2025565 AMAQI
11th Jul 2025586 AMAQI
11th Jul 2025547 AMAQI
11th Jul 2025548 AMAQI
11th Jul 2025569 AMAQI
11th Jul 20255510 AMAQI
11th Jul 20255611 AMAQI
11th Jul 20255512 PMAQI
11th Jul 2025551 PMAQI
11th Jul 2025542 PMAQI
11th Jul 2025523 PMAQI
11th Jul 2025534 PMAQI
11th Jul 2025535 PMAQI
11th Jul 2025536 PMAQI
11th Jul 2025537 PMAQI
11th Jul 2025538 PMAQI
11th Jul 2025529 PMAQI
11th Jul 20255210 PMAQI
11th Jul 20255111 PMAQI
12th Jul 20255112 AMAQI
12th Jul 2025511 AMAQI
12th Jul 2025452 AMAQI
12th Jul 2025443 AMAQI
12th Jul 2025394 AMAQI

26°C20/31°C

12th Jul 2025425 AMAQI
12th Jul 2025446 AMAQI
12th Jul 2025417 AMAQI
12th Jul 2025358 AMAQI
12th Jul 2025429 AMAQI
12th Jul 20253710 AMAQI
12th Jul 20254411 AMAQI
12th Jul 20253912 PMAQI
12th Jul 2025401 PMAQI
12th Jul 2025422 PMAQI
12th Jul 2025433 PMAQI
12th Jul 2025484 PMAQI
12th Jul 2025445 PMAQI
12th Jul 2025466 PMAQI
12th Jul 2025477 PMAQI
12th Jul 2025458 PMAQI
12th Jul 2025469 PMAQI
12th Jul 20254310 PMAQI
12th Jul 20254411 PMAQI
13th Jul 20254412 AMAQI
13th Jul 2025441 AMAQI
13th Jul 2025432 AMAQI
13th Jul 2025403 AMAQI
13th Jul 2025424 AMAQI

29°C22/36°C

13th Jul 2025405 AMAQI
13th Jul 2025376 AMAQI
13th Jul 2025357 AMAQI
13th Jul 2025368 AMAQI
13th Jul 2025419 AMAQI
13th Jul 20253910 AMAQI
13th Jul 20253911 AMAQI
13th Jul 20253812 PMAQI
13th Jul 2025371 PMAQI
13th Jul 2025362 PMAQI
13th Jul 2025343 PMAQI
13th Jul 2025354 PMAQI
13th Jul 2025395 PMAQI
13th Jul 2025386 PMAQI
13th Jul 2025407 PMAQI
13th Jul 2025388 PMAQI
13th Jul 2025399 PMAQI
13th Jul 20254110 PMAQI
13th Jul 20254411 PMAQI
14th Jul 20254812 AMAQI
14th Jul 2025471 AMAQI
14th Jul 2025462 AMAQI
14th Jul 2025493 AMAQI
14th Jul 2025494 AMAQI

27°C23/30°C

14th Jul 2025365 AMAQI
14th Jul 2025366 AMAQI
14th Jul 2025437 AMAQI
14th Jul 2025428 AMAQI
14th Jul 2025489 AMAQI
14th Jul 20254810 AMAQI
14th Jul 20254811 AMAQI
14th Jul 20255012 PMAQI
14th Jul 2025481 PMAQI
14th Jul 2025502 PMAQI
14th Jul 2025473 PMAQI
14th Jul 2025484 PMAQI
14th Jul 2025485 PMAQI
14th Jul 2025486 PMAQI
14th Jul 2025487 PMAQI
14th Jul 2025478 PMAQI
14th Jul 2025459 PMAQI
14th Jul 20254610 PMAQI
14th Jul 20254611 PMAQI
15th Jul 20254712 AMAQI
15th Jul 2025481 AMAQI
15th Jul 2025552 AMAQI
15th Jul 2025563 AMAQI
15th Jul 2025564 AMAQI

27°C22/34°C

15th Jul 2025585 AMAQI
15th Jul 2025616 AMAQI
15th Jul 2025617 AMAQI
15th Jul 2025628 AMAQI
15th Jul 2025589 AMAQI
15th Jul 20255810 AMAQI
15th Jul 20255711 AMAQI
15th Jul 20255512 PMAQI
15th Jul 2025541 PMAQI
15th Jul 2025552 PMAQI
15th Jul 2025563 PMAQI
15th Jul 2025624 PMAQI
15th Jul 2025625 PMAQI
15th Jul 2025616 PMAQI
15th Jul 2025617 PMAQI
15th Jul 2025618 PMAQI
15th Jul 2025609 PMAQI
15th Jul 20256010 PMAQI
15th Jul 20256011 PMAQI
16th Jul 20256012 AMAQI
16th Jul 2025591 AMAQI
16th Jul 2025582 AMAQI
16th Jul 2025643 AMAQI
16th Jul 2025704 AMAQI

27°C20/35°C

16th Jul 2025675 AMAQI
16th Jul 2025716 AMAQI
16th Jul 2025727 AMAQI
16th Jul 2025748 AMAQI
16th Jul 2025669 AMAQI
16th Jul 20256810 AMAQI
16th Jul 20256611 AMAQI
16th Jul 20256512 PMAQI
16th Jul 2025641 PMAQI
16th Jul 2025662 PMAQI
16th Jul 2025663 PMAQI
16th Jul 2025674 PMAQI
16th Jul 2025665 PMAQI
16th Jul 2025666 PMAQI
16th Jul 2025667 PMAQI
16th Jul 2025658 PMAQI
16th Jul 2025679 PMAQI
16th Jul 20256410 PMAQI
16th Jul 20256011 PMAQI
17th Jul 20256012 AMAQI
17th Jul 2025601 AMAQI
17th Jul 2025412 AMAQI
17th Jul 2025353 AMAQI
17th Jul 2025334 AMAQI

26°C18/36°C

17th Jul 2025285 AMAQI
17th Jul 2025306 AMAQI
17th Jul 2025297 AMAQI
17th Jul 2025318 AMAQI
17th Jul 2025369 AMAQI
17th Jul 20253510 AMAQI
17th Jul 20253411 AMAQI
17th Jul 20253812 PMAQI
17th Jul 2025501 PMAQI
17th Jul 2025452 PMAQI
17th Jul 2025293 PMAQI
17th Jul 2025334 PMAQI
17th Jul 2025365 PMAQI
17th Jul 2025366 PMAQI
17th Jul 2025367 PMAQI
17th Jul 2025368 PMAQI
17th Jul 2025369 PMAQI
17th Jul 20253610 PMAQI
17th Jul 20253311 PMAQI
18th Jul 20253312 AMAQI
18th Jul 2025301 AMAQI
18th Jul 2025212 AMAQI
18th Jul 2025203 AMAQI
18th Jul 2025204 AMAQI

24°C18/29°C

18th Jul 2025205 AMAQI
18th Jul 2025216 AMAQI
18th Jul 2025207 AMAQI
18th Jul 2025208 AMAQI
18th Jul 2025199 AMAQI
18th Jul 20251910 AMAQI
18th Jul 20252011 AMAQI
18th Jul 20252012 PMAQI
18th Jul 2025191 PMAQI
18th Jul 2025202 PMAQI
18th Jul 2025203 PMAQI
18th Jul 2025204 PMAQI
18th Jul 2025215 PMAQI
18th Jul 2025206 PMAQI
18th Jul 2025207 PMAQI
18th Jul 2025228 PMAQI
18th Jul 2025209 PMAQI
18th Jul 20252010 PMAQI
18th Jul 20252211 PMAQI
19th Jul 20252212 AMAQI
19th Jul 2025231 AMAQI
19th Jul 2025262 AMAQI
19th Jul 2025263 AMAQI
19th Jul 2025274 AMAQI

20°C14/27°C

19th Jul 2025285 AMAQI
19th Jul 2025266 AMAQI
19th Jul 2025277 AMAQI
19th Jul 2025288 AMAQI
19th Jul 2025279 AMAQI
19th Jul 20252710 AMAQI
19th Jul 20253111 AMAQI
19th Jul 20253712 PMAQI
19th Jul 2025351 PMAQI
19th Jul 2025322 PMAQI
19th Jul 2025333 PMAQI
19th Jul 2025304 PMAQI
19th Jul 2025285 PMAQI
19th Jul 2025286 PMAQI
19th Jul 2025277 PMAQI
19th Jul 2025268 PMAQI
19th Jul 2025279 PMAQI
19th Jul 20252810 PMAQI
19th Jul 20252611 PMAQI
20th Jul 20252612 AMAQI
20th Jul 2025271 AMAQI
20th Jul 2025262 AMAQI
20th Jul 2025243 AMAQI
20th Jul 2025224 AMAQI

23°C15/31°C

20th Jul 2025225 AMAQI
20th Jul 2025226 AMAQI
20th Jul 2025247 AMAQI
20th Jul 2025248 AMAQI
20th Jul 2025229 AMAQI
20th Jul 20252210 AMAQI
20th Jul 20252411 AMAQI
20th Jul 20252312 PMAQI
20th Jul 2025221 PMAQI
20th Jul 2025222 PMAQI
20th Jul 2025233 PMAQI
20th Jul 2025234 PMAQI
20th Jul 2025245 PMAQI
20th Jul 2025246 PMAQI
20th Jul 2025247 PMAQI
20th Jul 2025258 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252410 PMAQI
20th Jul 20252811 PMAQI
21st Jul 20252812 AMAQI
21st Jul 2025311 AMAQI
21st Jul 2025432 AMAQI
21st Jul 2025483 AMAQI
21st Jul 2025544 AMAQI

23°C19/28°C

21st Jul 2025585 AMAQI
21st Jul 2025596 AMAQI
21st Jul 2025577 AMAQI
21st Jul 2025588 AMAQI
21st Jul 2025549 AMAQI
21st Jul 20254610 AMAQI
21st Jul 20254111 AMAQI
21st Jul 20253612 PMAQI
21st Jul 2025341 PMAQI
21st Jul 2025352 PMAQI
21st Jul 2025363 PMAQI
21st Jul 2025384 PMAQI
21st Jul 2025425 PMAQI
21st Jul 2025416 PMAQI
21st Jul 2025427 PMAQI
21st Jul 2025418 PMAQI
21st Jul 2025449 PMAQI
21st Jul 20254410 PMAQI
21st Jul 20254211 PMAQI
22nd Jul 20254312 AMAQI
22nd Jul 2025441 AMAQI
22nd Jul 2025222 AMAQI
22nd Jul 2025203 AMAQI
22nd Jul 2025194 AMAQI

20°C16/24°C

22nd Jul 2025185 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025198 AMAQI
22nd Jul 2025219 AMAQI
22nd Jul 20252010 AMAQI
22nd Jul 20252011 AMAQI
22nd Jul 20252512 PMAQI
22nd Jul 2025231 PMAQI
22nd Jul 2025232 PMAQI
22nd Jul 2025233 PMAQI
22nd Jul 2025324 PMAQI
22nd Jul 2025245 PMAQI
22nd Jul 2025256 PMAQI
22nd Jul 2025247 PMAQI
22nd Jul 2025248 PMAQI
22nd Jul 2025249 PMAQI
22nd Jul 20252310 PMAQI
22nd Jul 20252411 PMAQI
23rd Jul 20252312 AMAQI
23rd Jul 2025251 AMAQI
23rd Jul 2025252 AMAQI
23rd Jul 2025263 AMAQI
23rd Jul 2025224 AMAQI

20°C14/25°C

23rd Jul 2025225 AMAQI
23rd Jul 2025236 AMAQI
23rd Jul 2025227 AMAQI
23rd Jul 2025248 AMAQI
23rd Jul 2025259 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20252812 PMAQI
23rd Jul 2025231 PMAQI
23rd Jul 2025252 PMAQI
23rd Jul 2025303 PMAQI
23rd Jul 2025264 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025266 PMAQI
23rd Jul 2025247 PMAQI
23rd Jul 2025258 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252410 PMAQI
23rd Jul 20252511 PMAQI
24th Jul 20252612 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025262 AMAQI
24th Jul 2025273 AMAQI
24th Jul 2025284 AMAQI

24°C16/32°C

24th Jul 2025275 AMAQI
24th Jul 2025276 AMAQI
24th Jul 2025287 AMAQI
24th Jul 2025298 AMAQI
24th Jul 2025289 AMAQI
24th Jul 20253110 AMAQI
24th Jul 20253411 AMAQI
24th Jul 20253712 PMAQI
24th Jul 2025431 PMAQI
24th Jul 2025462 PMAQI
24th Jul 2025463 PMAQI
24th Jul 2025424 PMAQI
24th Jul 2025415 PMAQI
24th Jul 2025406 PMAQI
24th Jul 2025367 PMAQI
24th Jul 2025368 PMAQI
24th Jul 2025359 PMAQI
24th Jul 20253410 PMAQI
24th Jul 20253711 PMAQI
25th Jul 20253412 AMAQI
25th Jul 2025321 AMAQI
25th Jul 2025272 AMAQI
25th Jul 2025263 AMAQI
25th Jul 2025244 AMAQI

27°C18/36°C

25th Jul 2025245 AMAQI
25th Jul 2025286 AMAQI
25th Jul 2025287 AMAQI
25th Jul 2025328 AMAQI
25th Jul 2025319 AMAQI
25th Jul 20253110 AMAQI
25th Jul 20253011 AMAQI
25th Jul 20252812 PMAQI
25th Jul 2025261 PMAQI
25th Jul 2025262 PMAQI
25th Jul 2025263 PMAQI
25th Jul 2025274 PMAQI
25th Jul 2025285 PMAQI
25th Jul 2025316 PMAQI
25th Jul 2025347 PMAQI
25th Jul 2025378 PMAQI
25th Jul 2025339 PMAQI
25th Jul 20253410 PMAQI
25th Jul 20253811 PMAQI
26th Jul 20254012 AMAQI
26th Jul 2025381 AMAQI
26th Jul 2025502 AMAQI
26th Jul 2025573 AMAQI
26th Jul 2025564 AMAQI

27°C23/30°C

26th Jul 2025545 AMAQI
26th Jul 2025576 AMAQI
26th Jul 2025547 AMAQI
26th Jul 2025518 AMAQI
26th Jul 2025569 AMAQI
26th Jul 20255810 AMAQI
26th Jul 20255411 AMAQI
26th Jul 20255612 PMAQI
26th Jul 2025541 PMAQI
26th Jul 2025542 PMAQI
26th Jul 2025533 PMAQI
26th Jul 2025554 PMAQI
26th Jul 2025585 PMAQI
26th Jul 2025566 PMAQI
26th Jul 2025567 PMAQI
26th Jul 2025538 PMAQI
26th Jul 2025559 PMAQI
26th Jul 20255410 PMAQI
26th Jul 20255211 PMAQI
27th Jul 20255412 AMAQI
27th Jul 2025501 AMAQI
27th Jul 2025322 AMAQI
27th Jul 2025363 AMAQI
27th Jul 2025354 AMAQI

25°C21/31°C

27th Jul 2025325 AMAQI
27th Jul 2025296 AMAQI
27th Jul 2025267 AMAQI
27th Jul 2025278 AMAQI
27th Jul 2025309 AMAQI
27th Jul 20253010 AMAQI
27th Jul 20253311 AMAQI
27th Jul 20253512 PMAQI
27th Jul 2025371 PMAQI
27th Jul 2025372 PMAQI
27th Jul 2025403 PMAQI
27th Jul 2025404 PMAQI
27th Jul 2025395 PMAQI
27th Jul 2025396 PMAQI
27th Jul 2025407 PMAQI
27th Jul 2025388 PMAQI
27th Jul 2025389 PMAQI
27th Jul 20253910 PMAQI
27th Jul 20254111 PMAQI
28th Jul 20254312 AMAQI
28th Jul 2025451 AMAQI
28th Jul 2025542 AMAQI
28th Jul 2025543 AMAQI
28th Jul 2025554 AMAQI

27°C22/34°C

28th Jul 2025555 AMAQI
28th Jul 2025546 AMAQI
28th Jul 2025557 AMAQI
28th Jul 2025548 AMAQI
28th Jul 2025549 AMAQI
28th Jul 20255410 AMAQI
28th Jul 20255511 AMAQI
28th Jul 20255412 PMAQI
28th Jul 2025541 PMAQI
28th Jul 2025542 PMAQI
28th Jul 2025533 PMAQI
28th Jul 2025544 PMAQI
28th Jul 2025545 PMAQI
28th Jul 2025546 PMAQI
28th Jul 2025547 PMAQI
28th Jul 2025548 PMAQI
28th Jul 2025549 PMAQI
28th Jul 20255310 PMAQI
28th Jul 20255211 PMAQI
29th Jul 20255212 AMAQI
29th Jul 2025521 AMAQI
29th Jul 2025472 AMAQI
29th Jul 2025463 AMAQI
29th Jul 2025474 AMAQI

27°C19/36°C

29th Jul 2025475 AMAQI
29th Jul 2025476 AMAQI
29th Jul 2025467 AMAQI
29th Jul 2025488 AMAQI
29th Jul 2025489 AMAQI
29th Jul 20254810 AMAQI
29th Jul 20254811 AMAQI
29th Jul 20254612 PMAQI
29th Jul 2025451 PMAQI
29th Jul 2025462 PMAQI
29th Jul 2025463 PMAQI
29th Jul 2025484 PMAQI
29th Jul 2025495 PMAQI
29th Jul 2025496 PMAQI
29th Jul 2025497 PMAQI
29th Jul 2025488 PMAQI
29th Jul 2025489 PMAQI
29th Jul 20254910 PMAQI
29th Jul 20254711 PMAQI
30th Jul 20254712 AMAQI
30th Jul 2025471 AMAQI
30th Jul 2025422 AMAQI
30th Jul 2025423 AMAQI
30th Jul 2025424 AMAQI

27°C21/35°C

30th Jul 2025425 AMAQI
30th Jul 2025416 AMAQI
30th Jul 2025427 AMAQI
30th Jul 2025428 AMAQI
30th Jul 2025449 AMAQI
30th Jul 20254410 AMAQI
30th Jul 20254611 AMAQI
30th Jul 20254512 PMAQI
30th Jul 2025471 PMAQI
30th Jul 2025492 PMAQI
30th Jul 2025473 PMAQI
30th Jul 2025504 PMAQI
30th Jul 2025515 PMAQI
30th Jul 2025516 PMAQI
30th Jul 2025517 PMAQI
30th Jul 2025518 PMAQI
30th Jul 2025519 PMAQI
30th Jul 20255110 PMAQI
30th Jul 20255211 PMAQI
31st Jul 20255012 AMAQI
31st Jul 2025501 AMAQI
31st Jul 2025642 AMAQI
31st Jul 2025673 AMAQI
31st Jul 2025834 AMAQI

26°C21/30°C

31st Jul 2025795 AMAQI
31st Jul 2025796 AMAQI
31st Jul 2025737 AMAQI
31st Jul 20251028 AMAQI
31st Jul 2025889 AMAQI
31st Jul 20256810 AMAQI
31st Jul 20255211 AMAQI
31st Jul 20259412 PMAQI
31st Jul 20251421 PMAQI
31st Jul 20251332 PMAQI
31st Jul 20251173 PMAQI
31st Jul 20251024 PMAQI
31st Jul 2025865 PMAQI
31st Jul 2025806 PMAQI
31st Jul 2025787 PMAQI
31st Jul 2025788 PMAQI
31st Jul 20251219 PMAQI
31st Jul 20259910 PMAQI
31st Jul 20258611 PMAQI
1st Aug 20258612 AMAQI
1st Aug 2025781 AMAQI
1st Aug 2025862 AMAQI
1st Aug 2025783 AMAQI
1st Aug 2025704 AMAQI

21°C17/24°C

1st Aug 2025735 AMAQI
1st Aug 2025756 AMAQI
1st Aug 2025667 AMAQI
1st Aug 2025678 AMAQI
1st Aug 2025629 AMAQI
1st Aug 20256010 AMAQI
1st Aug 20255411 AMAQI
1st Aug 20254612 PMAQI
1st Aug 2025411 PMAQI
1st Aug 2025392 PMAQI
1st Aug 2025363 PMAQI
1st Aug 2025304 PMAQI
1st Aug 2025285 PMAQI
1st Aug 2025256 PMAQI
1st Aug 2025247 PMAQI
1st Aug 2025228 PMAQI
1st Aug 2025499 PMAQI
1st Aug 20253510 PMAQI
1st Aug 20252311 PMAQI
2nd Aug 20252612 AMAQI
2nd Aug 2025281 AMAQI
2nd Aug 2025292 AMAQI
2nd Aug 2025283 AMAQI
2nd Aug 2025244 AMAQI

21°C15/27°C

2nd Aug 2025245 AMAQI
2nd Aug 2025246 AMAQI
2nd Aug 2025247 AMAQI
2nd Aug 2025258 AMAQI
2nd Aug 2025269 AMAQI
2nd Aug 20252810 AMAQI
2nd Aug 20252811 AMAQI
2nd Aug 20253012 PMAQI
2nd Aug 2025281 PMAQI
2nd Aug 2025262 PMAQI
2nd Aug 2025303 PMAQI
2nd Aug 2025324 PMAQI
2nd Aug 2025375 PMAQI
2nd Aug 2025476 PMAQI
2nd Aug 2025487 PMAQI
2nd Aug 2025458 PMAQI
2nd Aug 2025369 PMAQI
2nd Aug 20254210 PMAQI
2nd Aug 20255311 PMAQI
3rd Aug 20255812 AMAQI
3rd Aug 2025541 AMAQI
3rd Aug 2025612 AMAQI
3rd Aug 2025633 AMAQI
3rd Aug 2025664 AMAQI

22°C12/30°C

3rd Aug 2025705 AMAQI
5 AM
3rd Aug 2025806 AMAQI
3rd Aug 2025867 AMAQI
3rd Aug 20251048 AMAQI
3rd Aug 2025929 AMAQI
3rd Aug 20259610 AMAQI
3rd Aug 20259611 AMAQI
3rd Aug 20258212 PMAQI
12 PM
3rd Aug 2025781 PMAQI
3rd Aug 2025832 PMAQI
3rd Aug 2025783 PMAQI
3rd Aug 2025834 PMAQI
3rd Aug 2025845 PMAQI
3rd Aug 2025726 PMAQI
3rd Aug 2025607 PMAQI
8 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 8 PM

43AQI

16 hours / Day
480 hours / Month
Avg. Lowest Time
5 AM - 8 PM

43AQI

16 hours / Day
480 hours / Month
In the last 30 days, during the daytime, the highest AQI was between 5 AM to 8 PM (Avg. 43), while the lowest AQI was between 5 AM to 8 PM (Avg. 43).
Night time
Avg. Highest Time
12 AM - 11 PM

43AQI

8 hours / Day
240 hours / Month
Avg. Lowest Time
12 AM - 11 PM

43AQI

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. 43), while the lowest AQI was between 12 AM to 11 PM (Avg. 43).

2025 Days Vs Air Quality

Hamilton Downtown, Hamilton, Ontario, Canada

2025

86%

185

14%

30

Total number of days with different AQI categories in last 215 days in 2025 (150 days remaining)

Good
185 Days
Moderate
30 Days
Poor
0 Days
Unhealthy
0 Days
Severe
0 Days
Hazardous
0 Days

Under WHO’s Safe Air Quality Limits: 86%

Health Risk Level:

Low

In 2025, 86% of 215 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

Hamilton Downtown, Hamilton, 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
2nd January 2025
20AQI
3rd January 2025
23AQI
4th January 2025
26AQI
5th January 2025
25AQI
6th January 2025
22AQI
7th January 2025
22AQI
8th January 2025
25AQI
9th January 2025
24AQI
10th January 2025
45AQI
11th January 2025
65AQI
12th January 2025
52AQI
13th January 2025
43AQI
14th January 2025
29AQI
15th January 2025
27AQI
16th January 2025
54AQI
17th January 2025
45AQI
18th January 2025
27AQI
19th January 2025
26AQI
20th January 2025
24AQI
21st January 2025
24AQI
22nd January 2025
32AQI
23rd January 2025
45AQI
24th January 2025
29AQI
25th January 2025
54AQI
26th January 2025
33AQI
27th January 2025
27AQI
28th January 2025
27AQI
29th January 2025
25AQI
30th January 2025
25AQI
31st January 2025
58AQI
1st February 2025
26AQI
2nd February 2025
30AQI
3rd February 2025
61AQI
4th February 2025
24AQI
5th February 2025
26AQI
6th February 2025
38AQI
7th February 2025
27AQI
8th February 2025
48AQI
9th February 2025
34AQI
10th February 2025
29AQI
11th February 2025
49AQI
12th February 2025
28AQI
13th February 2025
30AQI
14th February 2025
30AQI
15th February 2025
38AQI
16th February 2025
29AQI
17th February 2025
26AQI
18th February 2025
26AQI
19th February 2025
22AQI
20th February 2025
21AQI
21st February 2025
25AQI
22nd February 2025
49AQI
23rd February 2025
61AQI
24th February 2025
54AQI
25th February 2025
57AQI
26th February 2025
36AQI
27th February 2025
44AQI
28th February 2025
24AQI
1st March 2025
27AQI
2nd March 2025
25AQI
3rd March 2025
31AQI
4th March 2025
38AQI
5th March 2025
54AQI
6th March 2025
25AQI
7th March 2025
31AQI
8th March 2025
33AQI
9th March 2025
29AQI
10th March 2025
32AQI
11th March 2025
33AQI
12th March 2025
26AQI
13th March 2025
35AQI
14th March 2025
61AQI
15th March 2025
62AQI
16th March 2025
31AQI
17th March 2025
16AQI
18th March 2025
24AQI
19th March 2025
47AQI
20th March 2025
30AQI
21st March 2025
17AQI
22nd March 2025
17AQI
23rd March 2025
26AQI
24th March 2025
24AQI
25th March 2025
20AQI
26th March 2025
19AQI
27th March 2025
22AQI
28th March 2025
22AQI
29th March 2025
20AQI
30th March 2025
22AQI
31st March 2025
24AQI
1st April 2025
17AQI
2nd April 2025
20AQI
3rd April 2025
29AQI
4th April 2025
21AQI
5th April 2025
23AQI
6th April 2025
17AQI
7th April 2025
19AQI
8th April 2025
16AQI
9th April 2025
19AQI
10th April 2025
29AQI
11th April 2025
38AQI
12th April 2025
37AQI
13th April 2025
34AQI
14th April 2025
33AQI
15th April 2025
17AQI
16th April 2025
14AQI
17th April 2025
18AQI
18th April 2025
40AQI
19th April 2025
42AQI
20th April 2025
19AQI
21st April 2025
23AQI
22nd April 2025
15AQI
23rd April 2025
24AQI
24th April 2025
37AQI
25th April 2025
50AQI
26th April 2025
31AQI
27th April 2025
14AQI
28th April 2025
29AQI
29th April 2025
39AQI
30th April 2025
23AQI
1st May 2025
30AQI
2nd May 2025
34AQI
3rd May 2025
18AQI
4th May 2025
17AQI
5th May 2025
19AQI
6th May 2025
27AQI
7th May 2025
30AQI
8th May 2025
19AQI
9th May 2025
26AQI
10th May 2025
24AQI
11th May 2025
22AQI
12th May 2025
32AQI
13th May 2025
41AQI
14th May 2025
40AQI
15th May 2025
39AQI
16th May 2025
35AQI
17th May 2025
28AQI
18th May 2025
18AQI
19th May 2025
18AQI
20th May 2025
16AQI
21st May 2025
18AQI
22nd May 2025
17AQI
23rd May 2025
11AQI
24th May 2025
12AQI
25th May 2025
13AQI
26th May 2025
18AQI
27th May 2025
33AQI
28th May 2025
36AQI
29th May 2025
27AQI
30th May 2025
31AQI
31st May 2025
26AQI
1st June 2025
15AQI
2nd June 2025
19AQI
3rd June 2025
33AQI
4th June 2025
58AQI
5th June 2025
50AQI
6th June 2025
62AQI
7th June 2025
61AQI
8th June 2025
76AQI
9th June 2025
63AQI
10th June 2025
44AQI
11th June 2025
57AQI
12th June 2025
66AQI
13th June 2025
38AQI
14th June 2025
28AQI
15th June 2025
38AQI
16th June 2025
39AQI
17th June 2025
44AQI
18th June 2025
36AQI
19th June 2025
25AQI
20th June 2025
38AQI
21st June 2025
49AQI
22nd June 2025
49AQI
23rd June 2025
52AQI
24th June 2025
54AQI
25th June 2025
43AQI
26th June 2025
41AQI
27th June 2025
35AQI
28th June 2025
33AQI
29th June 2025
38AQI
30th June 2025
42AQI
1st July 2025
38AQI
2nd July 2025
41AQI
3rd July 2025
49AQI
4th July 2025
33AQI
5th July 2025
44AQI
6th July 2025
51AQI
7th July 2025
48AQI
8th July 2025
33AQI
9th July 2025
40AQI
10th July 2025
36AQI
11th July 2025
53AQI
12th July 2025
44AQI
13th July 2025
39AQI
14th July 2025
46AQI
15th July 2025
58AQI
16th July 2025
65AQI
17th July 2025
37AQI
18th July 2025
21AQI
19th July 2025
28AQI
20th July 2025
24AQI
21st July 2025
44AQI
22nd July 2025
24AQI
23rd July 2025
25AQI
24th July 2025
33AQI
25th July 2025
30AQI
26th July 2025
53AQI
27th July 2025
37AQI
28th July 2025
53AQI
29th July 2025
48AQI
30th July 2025
47AQI
31st July 2025
85AQI
1st August 2025
52AQI
2nd August 2025
30AQI
3rd August 2025
66AQI

33AQI

35AQI

30AQI

26AQI

25AQI

44AQI

42AQI

49AQI

No. of days

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

202534AQI

26
5
24
4
28
3
30
31
21
9
24
7
1
2
185
30

Highest AQI recorded in

August

49AQI

Lowest AQI recorded in

May

25AQI

202435AQI

25
6
23
6
29
2
29
1
21
10
27
3
29
2
24
7
21
9
30
1
30
29
2
317
49

Highest AQI recorded in

May

40AQI

Lowest AQI recorded in

November

25AQI

202343AQI

26
5
24
4
27
4
20
10
23
8
10
18
1
1
20
11
22
9
24
6
28
3
27
2
21
10
272
90
1
1

Highest AQI recorded in

June

66AQI

Lowest AQI recorded in

October

31AQI

202238AQI

28
3
20
1
25
6
24
5
22
9
24
6
20
4
1
26
3
22
9
22
8
28
3
262
57

Highest AQI recorded in

May

45AQI

Lowest AQI recorded in

August

20AQI

202138AQI

22
8
24
4
23
8
21
9
24
7
24
6
23
8
24
7
29
1
30
1
26
4
26
5
296
68

Highest AQI recorded in

April

43AQI

Lowest AQI recorded in

October

29AQI

202036AQI

5
2
21
10
8
24
6
29
2
25
6
27
3
30
1
25
5
26
5
222
38

Highest AQI recorded in

May

48AQI

Lowest AQI recorded in

October

27AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
43AQI
Least Polluted Year Recorded
2025(Avg.)
34AQI

Hamilton Downtown's annual 2025 AQI (34) shows an average percentage change of -10.3% (improved AQI) compared to previous years: 2020 (36), 2021 (38), 2022 (38), 2023 (43), 2024 (35).