Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Kitchener, Waterloo, 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

Kitchener, Waterloo, Ontario, Canada

2021
2022
2023
2024
2025
AQI
.
Days

AQI Trends: Highest and Lowest

Highest AQI recorded on
16th Aug 2023
92AQI
Lowest AQI recorded on
2nd Aug 2021
17AQI

Same Day Analysis (1st August ):
On this day, AQI across the 5 years varied significantly: 2025 ranks 1st highest AQI at 60 of Moderate air quality on the same day.

Download 2024 Annual Data

World Air Quality Report

Globe

Day & Night AQI Trend: 1st Aug - 2nd Aug 2025

Kitchener, Waterloo, Ontario, Canada

AQI
Day
Night
.

5 AM1st Aug 2025

8 PM

4 AM2nd Aug 2025

Day time
Avg. Highest Time
6AM1st Aug

78AQI

Avg. Lowest Time
5PM1st Aug

27AQI

Night time
Avg. Highest Time
5AM1st Aug

76AQI

Avg. Lowest Time
11PM1st Aug

23AQI

In the last 24 hours,

Kitchener's AQI reached its highest point of 78 at 6 AM during the Day, while the lowest point, 23, was recorded at 11 PM during the Night between 1st Aug and 2nd Aug 2025.

Day & Night AQI Trend : Jul - Aug 2025

Kitchener, Waterloo, 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 2025435 AMAQI
3rd Jul 2025406 AMAQI
3rd Jul 2025407 AMAQI
3rd Jul 2025408 AMAQI
3rd Jul 2025439 AMAQI
3rd Jul 20254810 AMAQI
3rd Jul 20255111 AMAQI
3rd Jul 20254612 PMAQI
3rd Jul 2025471 PMAQI
3rd Jul 2025462 PMAQI
3rd Jul 2025463 PMAQI
3rd Jul 2025484 PMAQI
3rd Jul 2025505 PMAQI
3rd Jul 2025526 PMAQI
3rd Jul 2025517 PMAQI
3rd Jul 2025488 PMAQI
3rd Jul 2025509 PMAQI
3rd Jul 20254910 PMAQI
3rd Jul 20254311 PMAQI
4th Jul 20254312 AMAQI
4th Jul 2025431 AMAQI
4th Jul 2025422 AMAQI
4th Jul 2025423 AMAQI
4th Jul 2025364 AMAQI

22°C15/29°C

4th Jul 2025395 AMAQI
4th Jul 2025396 AMAQI
4th Jul 2025387 AMAQI
4th Jul 2025428 AMAQI
4th Jul 2025419 AMAQI
4th Jul 20254010 AMAQI
4th Jul 20253911 AMAQI
4th Jul 20253812 PMAQI
4th Jul 2025381 PMAQI
4th Jul 2025362 PMAQI
4th Jul 2025363 PMAQI
4th Jul 2025384 PMAQI
4th Jul 2025415 PMAQI
4th Jul 2025426 PMAQI
4th Jul 2025447 PMAQI
4th Jul 2025458 PMAQI
4th Jul 2025399 PMAQI
4th Jul 20254010 PMAQI
4th Jul 20254411 PMAQI
5th Jul 20254412 AMAQI
5th Jul 2025451 AMAQI
5th Jul 2025362 AMAQI
5th Jul 2025443 AMAQI
5th Jul 2025464 AMAQI

20°C12/29°C

5th Jul 2025445 AMAQI
5th Jul 2025446 AMAQI
5th Jul 2025427 AMAQI
5th Jul 2025428 AMAQI
5th Jul 2025469 AMAQI
5th Jul 20254910 AMAQI
5th Jul 20255111 AMAQI
5th Jul 20254912 PMAQI
5th Jul 2025501 PMAQI
5th Jul 2025482 PMAQI
5th Jul 2025463 PMAQI
5th Jul 2025434 PMAQI
5th Jul 2025445 PMAQI
5th Jul 2025426 PMAQI
5th Jul 2025447 PMAQI
5th Jul 2025428 PMAQI
5th Jul 2025449 PMAQI
5th Jul 20254410 PMAQI
5th Jul 20254611 PMAQI
6th Jul 20254412 AMAQI
6th Jul 2025501 AMAQI
6th Jul 2025512 AMAQI
6th Jul 2025523 AMAQI
6th Jul 2025544 AMAQI

24°C16/32°C

6th Jul 2025545 AMAQI
6th Jul 2025546 AMAQI
6th Jul 2025547 AMAQI
6th Jul 2025528 AMAQI
6th Jul 2025539 AMAQI
6th Jul 20255410 AMAQI
6th Jul 20255411 AMAQI
6th Jul 20255412 PMAQI
6th Jul 2025541 PMAQI
6th Jul 2025522 PMAQI
6th Jul 2025533 PMAQI
6th Jul 2025534 PMAQI
6th Jul 2025525 PMAQI
6th Jul 2025516 PMAQI
6th Jul 2025537 PMAQI
6th Jul 2025548 PMAQI
6th Jul 2025549 PMAQI
6th Jul 20255410 PMAQI
6th Jul 20255211 PMAQI
7th Jul 20255312 AMAQI
7th Jul 2025541 AMAQI
7th Jul 2025542 AMAQI
7th Jul 2025533 AMAQI
7th Jul 2025534 AMAQI

27°C21/35°C

7th Jul 2025525 AMAQI
7th Jul 2025526 AMAQI
7th Jul 2025517 AMAQI
7th Jul 2025518 AMAQI
7th Jul 2025509 AMAQI
7th Jul 20254510 AMAQI
7th Jul 20254211 AMAQI
7th Jul 20254012 PMAQI
7th Jul 2025401 PMAQI
7th Jul 2025392 PMAQI
7th Jul 2025383 PMAQI
7th Jul 2025404 PMAQI
7th Jul 2025405 PMAQI
7th Jul 2025416 PMAQI
7th Jul 2025417 PMAQI
7th Jul 2025438 PMAQI
7th Jul 2025429 PMAQI
7th Jul 20254410 PMAQI
7th Jul 20254011 PMAQI
8th Jul 20253812 AMAQI
8th Jul 2025361 AMAQI
8th Jul 2025272 AMAQI
8th Jul 2025303 AMAQI
8th Jul 2025284 AMAQI

22°C19/24°C

8th Jul 2025275 AMAQI
8th Jul 2025266 AMAQI
8th Jul 2025267 AMAQI
8th Jul 2025288 AMAQI
8th Jul 2025279 AMAQI
8th Jul 20252610 AMAQI
8th Jul 20252711 AMAQI
8th Jul 20253012 PMAQI
8th Jul 2025361 PMAQI
8th Jul 2025422 PMAQI
8th Jul 2025463 PMAQI
8th Jul 2025444 PMAQI
8th Jul 2025415 PMAQI
8th Jul 2025396 PMAQI
8th Jul 2025367 PMAQI
8th Jul 2025348 PMAQI
8th Jul 2025319 PMAQI
8th Jul 20253010 PMAQI
8th Jul 20253411 PMAQI
9th Jul 20253612 AMAQI
9th Jul 2025401 AMAQI
9th Jul 2025462 AMAQI
9th Jul 2025443 AMAQI
9th Jul 2025424 AMAQI

22°C18/25°C

9th Jul 2025455 AMAQI
9th Jul 2025446 AMAQI
9th Jul 2025437 AMAQI
9th Jul 2025378 AMAQI
9th Jul 2025409 AMAQI
9th Jul 20254810 AMAQI
9th Jul 20255111 AMAQI
9th Jul 20255012 PMAQI
9th Jul 2025501 PMAQI
9th Jul 2025502 PMAQI
9th Jul 2025483 PMAQI
9th Jul 2025464 PMAQI
9th Jul 2025475 PMAQI
9th Jul 2025456 PMAQI
9th Jul 2025467 PMAQI
9th Jul 2025448 PMAQI
9th Jul 2025449 PMAQI
9th Jul 20254410 PMAQI
9th Jul 20254011 PMAQI
10th Jul 20253812 AMAQI
10th Jul 2025351 AMAQI
10th Jul 2025282 AMAQI
10th Jul 2025303 AMAQI
10th Jul 2025314 AMAQI

20°C15/28°C

10th Jul 2025315 AMAQI
10th Jul 2025316 AMAQI
10th Jul 2025327 AMAQI
10th Jul 2025328 AMAQI
10th Jul 2025339 AMAQI
10th Jul 20253210 AMAQI
10th Jul 20253411 AMAQI
10th Jul 20254012 PMAQI
10th Jul 2025441 PMAQI
10th Jul 2025462 PMAQI
10th Jul 2025473 PMAQI
10th Jul 2025464 PMAQI
10th Jul 2025485 PMAQI
10th Jul 2025476 PMAQI
10th Jul 2025467 PMAQI
10th Jul 2025438 PMAQI
10th Jul 2025399 PMAQI
10th Jul 20253810 PMAQI
10th Jul 20254111 PMAQI
11th Jul 20254012 AMAQI
11th Jul 2025431 AMAQI
11th Jul 2025482 AMAQI
11th Jul 2025493 AMAQI
11th Jul 2025474 AMAQI

23°C17/28°C

11th Jul 2025475 AMAQI
11th Jul 2025496 AMAQI
11th Jul 2025467 AMAQI
11th Jul 2025448 AMAQI
11th Jul 2025469 AMAQI
11th Jul 20255110 AMAQI
11th Jul 20255111 AMAQI
11th Jul 20255112 PMAQI
11th Jul 2025501 PMAQI
11th Jul 2025502 PMAQI
11th Jul 2025503 PMAQI
11th Jul 2025504 PMAQI
11th Jul 2025515 PMAQI
11th Jul 2025506 PMAQI
11th Jul 2025497 PMAQI
11th Jul 2025498 PMAQI
11th Jul 2025489 PMAQI
11th Jul 20254810 PMAQI
11th Jul 20254811 PMAQI
12th Jul 20254712 AMAQI
12th Jul 2025481 AMAQI
12th Jul 2025482 AMAQI
12th Jul 2025423 AMAQI
12th Jul 2025454 AMAQI

23°C18/30°C

12th Jul 2025445 AMAQI
12th Jul 2025406 AMAQI
12th Jul 2025397 AMAQI
12th Jul 2025398 AMAQI
12th Jul 2025419 AMAQI
12th Jul 20254110 AMAQI
12th Jul 20254011 AMAQI
12th Jul 20254012 PMAQI
12th Jul 2025411 PMAQI
12th Jul 2025422 PMAQI
12th Jul 2025453 PMAQI
12th Jul 2025454 PMAQI
12th Jul 2025465 PMAQI
12th Jul 2025476 PMAQI
12th Jul 2025487 PMAQI
12th Jul 2025478 PMAQI
12th Jul 2025449 PMAQI
12th Jul 20254610 PMAQI
12th Jul 20254611 PMAQI
13th Jul 20254812 AMAQI
13th Jul 2025481 AMAQI
13th Jul 2025422 AMAQI
13th Jul 2025433 AMAQI
13th Jul 2025404 AMAQI

27°C21/35°C

13th Jul 2025405 AMAQI
13th Jul 2025416 AMAQI
13th Jul 2025447 AMAQI
13th Jul 2025468 AMAQI
13th Jul 2025449 AMAQI
13th Jul 20254310 AMAQI
13th Jul 20254311 AMAQI
13th Jul 20254312 PMAQI
13th Jul 2025431 PMAQI
13th Jul 2025402 PMAQI
13th Jul 2025383 PMAQI
13th Jul 2025404 PMAQI
13th Jul 2025445 PMAQI
13th Jul 2025476 PMAQI
13th Jul 2025527 PMAQI
13th Jul 2025528 PMAQI
13th Jul 2025469 PMAQI
13th Jul 20254410 PMAQI
13th Jul 20254611 PMAQI
14th Jul 20254512 AMAQI
14th Jul 2025461 AMAQI
14th Jul 2025502 AMAQI
14th Jul 2025443 AMAQI
14th Jul 2025484 AMAQI

25°C21/29°C

14th Jul 2025445 AMAQI
14th Jul 2025406 AMAQI
14th Jul 2025427 AMAQI
14th Jul 2025448 AMAQI
14th Jul 2025489 AMAQI
14th Jul 20254810 AMAQI
14th Jul 20254811 AMAQI
14th Jul 20254812 PMAQI
14th Jul 2025491 PMAQI
14th Jul 2025502 PMAQI
14th Jul 2025503 PMAQI
14th Jul 2025494 PMAQI
14th Jul 2025495 PMAQI
14th Jul 2025486 PMAQI
14th Jul 2025487 PMAQI
14th Jul 2025488 PMAQI
14th Jul 2025489 PMAQI
14th Jul 20254910 PMAQI
14th Jul 20254811 PMAQI
15th Jul 20254712 AMAQI
15th Jul 2025481 AMAQI
15th Jul 2025582 AMAQI
15th Jul 2025623 AMAQI
15th Jul 2025664 AMAQI

25°C19/32°C

15th Jul 2025685 AMAQI
15th Jul 2025706 AMAQI
15th Jul 2025697 AMAQI
15th Jul 2025688 AMAQI
15th Jul 2025609 AMAQI
15th Jul 20256110 AMAQI
15th Jul 20256111 AMAQI
15th Jul 20256112 PMAQI
15th Jul 2025611 PMAQI
15th Jul 2025612 PMAQI
15th Jul 2025623 PMAQI
15th Jul 2025614 PMAQI
15th Jul 2025615 PMAQI
15th Jul 2025606 PMAQI
15th Jul 2025607 PMAQI
15th Jul 2025608 PMAQI
15th Jul 2025609 PMAQI
15th Jul 20256010 PMAQI
15th Jul 20256011 PMAQI
16th Jul 20255912 AMAQI
16th Jul 2025601 AMAQI
16th Jul 2025682 AMAQI
16th Jul 2025723 AMAQI
16th Jul 2025744 AMAQI

25°C16/34°C

16th Jul 2025795 AMAQI
16th Jul 2025756 AMAQI
16th Jul 2025767 AMAQI
16th Jul 2025748 AMAQI
16th Jul 2025729 AMAQI
16th Jul 20257210 AMAQI
16th Jul 20257211 AMAQI
16th Jul 20257012 PMAQI
16th Jul 2025701 PMAQI
16th Jul 2025702 PMAQI
16th Jul 2025713 PMAQI
16th Jul 2025654 PMAQI
16th Jul 2025655 PMAQI
16th Jul 2025646 PMAQI
16th Jul 2025647 PMAQI
16th Jul 2025648 PMAQI
16th Jul 2025649 PMAQI
16th Jul 20256310 PMAQI
16th Jul 20256011 PMAQI
17th Jul 20256012 AMAQI
17th Jul 2025611 AMAQI
17th Jul 2025492 AMAQI
17th Jul 2025503 AMAQI
17th Jul 2025514 AMAQI

25°C18/33°C

17th Jul 2025485 AMAQI
17th Jul 2025466 AMAQI
17th Jul 2025427 AMAQI
17th Jul 2025428 AMAQI
17th Jul 2025449 AMAQI
17th Jul 20254210 AMAQI
17th Jul 20254311 AMAQI
17th Jul 20254612 PMAQI
17th Jul 2025521 PMAQI
17th Jul 2025482 PMAQI
17th Jul 2025373 PMAQI
17th Jul 2025384 PMAQI
17th Jul 2025385 PMAQI
17th Jul 2025406 PMAQI
17th Jul 2025407 PMAQI
17th Jul 2025428 PMAQI
17th Jul 2025429 PMAQI
17th Jul 20254210 PMAQI
17th Jul 20253411 PMAQI
18th Jul 20253412 AMAQI
18th Jul 2025301 AMAQI
18th Jul 2025222 AMAQI
18th Jul 2025203 AMAQI
18th Jul 2025204 AMAQI

21°C16/24°C

18th Jul 2025215 AMAQI
18th Jul 2025216 AMAQI
18th Jul 2025217 AMAQI
18th Jul 2025228 AMAQI
18th Jul 2025209 AMAQI
18th Jul 20252110 AMAQI
18th Jul 20252011 AMAQI
18th Jul 20252012 PMAQI
18th Jul 2025201 PMAQI
18th Jul 2025222 PMAQI
18th Jul 2025223 PMAQI
18th Jul 2025234 PMAQI
18th Jul 2025225 PMAQI
18th Jul 2025246 PMAQI
18th Jul 2025257 PMAQI
18th Jul 2025258 PMAQI
18th Jul 2025229 PMAQI
18th Jul 20252210 PMAQI
18th Jul 20252411 PMAQI
19th Jul 20252812 AMAQI
19th Jul 2025291 AMAQI
19th Jul 2025402 AMAQI
19th Jul 2025483 AMAQI
19th Jul 2025524 AMAQI

18°C10/25°C

19th Jul 2025525 AMAQI
19th Jul 2025496 AMAQI
19th Jul 2025427 AMAQI
19th Jul 2025368 AMAQI
19th Jul 2025369 AMAQI
19th Jul 20253510 AMAQI
19th Jul 20253611 AMAQI
19th Jul 20253212 PMAQI
19th Jul 2025281 PMAQI
19th Jul 2025262 PMAQI
19th Jul 2025283 PMAQI
19th Jul 2025284 PMAQI
19th Jul 2025305 PMAQI
19th Jul 2025306 PMAQI
19th Jul 2025307 PMAQI
19th Jul 2025298 PMAQI
19th Jul 2025329 PMAQI
19th Jul 20253310 PMAQI
19th Jul 20253011 PMAQI
20th Jul 20253012 AMAQI
20th Jul 2025281 AMAQI
20th Jul 2025222 AMAQI
20th Jul 2025253 AMAQI
20th Jul 2025274 AMAQI

21°C13/30°C

20th Jul 2025265 AMAQI
20th Jul 2025226 AMAQI
20th Jul 2025227 AMAQI
20th Jul 2025248 AMAQI
20th Jul 2025249 AMAQI
20th Jul 20252110 AMAQI
20th Jul 20252011 AMAQI
20th Jul 20251912 PMAQI
20th Jul 2025201 PMAQI
20th Jul 2025232 PMAQI
20th Jul 2025233 PMAQI
20th Jul 2025224 PMAQI
20th Jul 2025225 PMAQI
20th Jul 2025236 PMAQI
20th Jul 2025237 PMAQI
20th Jul 2025248 PMAQI
20th Jul 2025249 PMAQI
20th Jul 20252610 PMAQI
20th Jul 20253411 PMAQI
21st Jul 20253412 AMAQI
21st Jul 2025371 AMAQI
21st Jul 2025502 AMAQI
21st Jul 2025593 AMAQI
21st Jul 2025604 AMAQI

22°C16/27°C

21st Jul 2025655 AMAQI
21st Jul 2025666 AMAQI
21st Jul 2025647 AMAQI
21st Jul 2025618 AMAQI
21st Jul 2025589 AMAQI
21st Jul 20255110 AMAQI
21st Jul 20254411 AMAQI
21st Jul 20253912 PMAQI
21st Jul 2025361 PMAQI
21st Jul 2025362 PMAQI
21st Jul 2025343 PMAQI
21st Jul 2025354 PMAQI
21st Jul 2025425 PMAQI
21st Jul 2025416 PMAQI
21st Jul 2025397 PMAQI
21st Jul 2025388 PMAQI
21st Jul 2025489 PMAQI
21st Jul 20254710 PMAQI
21st Jul 20254111 PMAQI
22nd Jul 20253912 AMAQI
22nd Jul 2025361 AMAQI
22nd Jul 2025302 AMAQI
22nd Jul 2025193 AMAQI
22nd Jul 2025204 AMAQI

18°C12/23°C

22nd Jul 2025195 AMAQI
22nd Jul 2025186 AMAQI
22nd Jul 2025187 AMAQI
22nd Jul 2025198 AMAQI
22nd Jul 2025189 AMAQI
22nd Jul 20251910 AMAQI
22nd Jul 20252011 AMAQI
22nd Jul 20252012 PMAQI
22nd Jul 2025201 PMAQI
22nd Jul 2025222 PMAQI
22nd Jul 2025223 PMAQI
22nd Jul 2025244 PMAQI
22nd Jul 2025245 PMAQI
22nd Jul 2025246 PMAQI
22nd Jul 2025247 PMAQI
22nd Jul 2025248 PMAQI
22nd Jul 2025229 PMAQI
22nd Jul 20252210 PMAQI
22nd Jul 20252411 PMAQI
23rd Jul 20252412 AMAQI
23rd Jul 2025251 AMAQI
23rd Jul 2025242 AMAQI
23rd Jul 2025233 AMAQI
23rd Jul 2025254 AMAQI

18°C11/24°C

23rd Jul 2025275 AMAQI
23rd Jul 2025296 AMAQI
23rd Jul 2025307 AMAQI
23rd Jul 2025288 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252810 AMAQI
23rd Jul 20252811 AMAQI
23rd Jul 20252612 PMAQI
23rd Jul 2025261 PMAQI
23rd Jul 2025252 PMAQI
23rd Jul 2025223 PMAQI
23rd Jul 2025234 PMAQI
23rd Jul 2025265 PMAQI
23rd Jul 2025266 PMAQI
23rd Jul 2025257 PMAQI
23rd Jul 2025258 PMAQI
23rd Jul 2025259 PMAQI
23rd Jul 20252610 PMAQI
23rd Jul 20252511 PMAQI
24th Jul 20252512 AMAQI
24th Jul 2025251 AMAQI
24th Jul 2025262 AMAQI
24th Jul 2025263 AMAQI
24th Jul 2025284 AMAQI

22°C13/32°C

24th Jul 2025285 AMAQI
24th Jul 2025266 AMAQI
24th Jul 2025267 AMAQI
24th Jul 2025308 AMAQI
24th Jul 2025309 AMAQI
24th Jul 20253410 AMAQI
24th Jul 20253911 AMAQI
24th Jul 20254712 PMAQI
24th Jul 2025481 PMAQI
24th Jul 2025512 PMAQI
24th Jul 2025483 PMAQI
24th Jul 2025464 PMAQI
24th Jul 2025455 PMAQI
24th Jul 2025476 PMAQI
24th Jul 2025457 PMAQI
24th Jul 2025448 PMAQI
24th Jul 2025389 PMAQI
24th Jul 20253810 PMAQI
24th Jul 20254111 PMAQI
25th Jul 20253512 AMAQI
25th Jul 2025321 AMAQI
25th Jul 2025262 AMAQI
25th Jul 2025263 AMAQI
25th Jul 2025284 AMAQI

26°C17/36°C

25th Jul 2025315 AMAQI
25th Jul 2025326 AMAQI
25th Jul 2025307 AMAQI
25th Jul 2025328 AMAQI
25th Jul 2025319 AMAQI
25th Jul 20252710 AMAQI
25th Jul 20252611 AMAQI
25th Jul 20252412 PMAQI
25th Jul 2025261 PMAQI
25th Jul 2025262 PMAQI
25th Jul 2025273 PMAQI
25th Jul 2025294 PMAQI
25th Jul 2025365 PMAQI
25th Jul 2025406 PMAQI
25th Jul 2025357 PMAQI
25th Jul 2025418 PMAQI
25th Jul 2025369 PMAQI
25th Jul 20253710 PMAQI
25th Jul 20254311 PMAQI
26th Jul 20253312 AMAQI
26th Jul 2025341 AMAQI
26th Jul 2025562 AMAQI
26th Jul 2025593 AMAQI
26th Jul 2025624 AMAQI

25°C21/29°C

26th Jul 2025635 AMAQI
26th Jul 2025646 AMAQI
26th Jul 2025607 AMAQI
26th Jul 2025578 AMAQI
26th Jul 2025649 AMAQI
26th Jul 20256810 AMAQI
26th Jul 20256811 AMAQI
26th Jul 20256612 PMAQI
26th Jul 2025611 PMAQI
26th Jul 2025602 PMAQI
26th Jul 2025583 PMAQI
26th Jul 2025584 PMAQI
26th Jul 2025575 PMAQI
26th Jul 2025566 PMAQI
26th Jul 2025557 PMAQI
26th Jul 2025548 PMAQI
26th Jul 2025579 PMAQI
26th Jul 20255710 PMAQI
26th Jul 20255211 PMAQI
27th Jul 20255212 AMAQI
27th Jul 2025501 AMAQI
27th Jul 2025382 AMAQI
27th Jul 2025423 AMAQI
27th Jul 2025384 AMAQI

23°C17/30°C

27th Jul 2025355 AMAQI
27th Jul 2025346 AMAQI
27th Jul 2025357 AMAQI
27th Jul 2025358 AMAQI
27th Jul 2025379 AMAQI
27th Jul 20253510 AMAQI
27th Jul 20253811 AMAQI
27th Jul 20254212 PMAQI
27th Jul 2025441 PMAQI
27th Jul 2025402 PMAQI
27th Jul 2025383 PMAQI
27th Jul 2025404 PMAQI
27th Jul 2025445 PMAQI
27th Jul 2025446 PMAQI
27th Jul 2025447 PMAQI
27th Jul 2025438 PMAQI
27th Jul 2025419 PMAQI
27th Jul 20254210 PMAQI
27th Jul 20254611 PMAQI
28th Jul 20254612 AMAQI
28th Jul 2025481 AMAQI
28th Jul 2025522 AMAQI
28th Jul 2025523 AMAQI
28th Jul 2025514 AMAQI

25°C21/33°C

28th Jul 2025515 AMAQI
28th Jul 2025506 AMAQI
28th Jul 2025497 AMAQI
28th Jul 2025488 AMAQI
28th Jul 2025519 AMAQI
28th Jul 20255210 AMAQI
28th Jul 20255511 AMAQI
28th Jul 20255512 PMAQI
28th Jul 2025531 PMAQI
28th Jul 2025532 PMAQI
28th Jul 2025523 PMAQI
28th Jul 2025524 PMAQI
28th Jul 2025525 PMAQI
28th Jul 2025526 PMAQI
28th Jul 2025527 PMAQI
28th Jul 2025528 PMAQI
28th Jul 2025529 PMAQI
28th Jul 20255110 PMAQI
28th Jul 20255011 PMAQI
29th Jul 20255012 AMAQI
29th Jul 2025481 AMAQI
29th Jul 2025442 AMAQI
29th Jul 2025433 AMAQI
29th Jul 2025454 AMAQI

25°C17/34°C

29th Jul 2025445 AMAQI
29th Jul 2025456 AMAQI
29th Jul 2025427 AMAQI
29th Jul 2025418 AMAQI
29th Jul 2025429 AMAQI
29th Jul 20254310 AMAQI
29th Jul 20254311 AMAQI
29th Jul 20254212 PMAQI
29th Jul 2025391 PMAQI
29th Jul 2025362 PMAQI
29th Jul 2025383 PMAQI
29th Jul 2025394 PMAQI
29th Jul 2025425 PMAQI
29th Jul 2025436 PMAQI
29th Jul 2025427 PMAQI
29th Jul 2025438 PMAQI
29th Jul 2025449 PMAQI
29th Jul 20254410 PMAQI
29th Jul 20254111 PMAQI
30th Jul 20254212 AMAQI
30th Jul 2025421 AMAQI
30th Jul 2025422 AMAQI
30th Jul 2025443 AMAQI
30th Jul 2025454 AMAQI

26°C19/34°C

30th Jul 2025445 AMAQI
30th Jul 2025446 AMAQI
30th Jul 2025477 AMAQI
30th Jul 2025458 AMAQI
30th Jul 2025469 AMAQI
30th Jul 20254810 AMAQI
30th Jul 20254711 AMAQI
30th Jul 20255012 PMAQI
30th Jul 2025521 PMAQI
30th Jul 2025532 PMAQI
30th Jul 2025543 PMAQI
30th Jul 2025594 PMAQI
30th Jul 2025605 PMAQI
30th Jul 2025606 PMAQI
30th Jul 2025607 PMAQI
30th Jul 2025608 PMAQI
30th Jul 2025609 PMAQI
30th Jul 20256010 PMAQI
30th Jul 20255511 PMAQI
31st Jul 20255012 AMAQI
31st Jul 2025541 AMAQI
31st Jul 2025632 AMAQI
31st Jul 2025703 AMAQI
31st Jul 2025924 AMAQI

24°C18/29°C

31st Jul 2025805 AMAQI
31st Jul 2025776 AMAQI
31st Jul 2025837 AMAQI
31st Jul 20251148 AMAQI
31st Jul 20251249 AMAQI
31st Jul 20259710 AMAQI
31st Jul 20257011 AMAQI
31st Jul 202510512 PMAQI
31st Jul 20251461 PMAQI
31st Jul 20251552 PMAQI
31st Jul 20251483 PMAQI
31st Jul 20251364 PMAQI
31st Jul 20251215 PMAQI
31st Jul 20251076 PMAQI
31st Jul 20251087 PMAQI
31st Jul 2025948 PMAQI
31st Jul 20251409 PMAQI
31st Jul 202510610 PMAQI
31st Jul 20258711 PMAQI
1st Aug 20258912 AMAQI
1st Aug 2025921 AMAQI
1st Aug 2025882 AMAQI
1st Aug 2025743 AMAQI
1st Aug 2025774 AMAQI

19°C15/24°C

1st Aug 2025765 AMAQI
1st Aug 2025786 AMAQI
1st Aug 2025747 AMAQI
1st Aug 2025718 AMAQI
1st Aug 2025649 AMAQI
1st Aug 20256010 AMAQI
1st Aug 20255611 AMAQI
1st Aug 20254912 PMAQI
1st Aug 2025421 PMAQI
1st Aug 2025382 PMAQI
1st Aug 2025353 PMAQI
1st Aug 2025404 PMAQI
1st Aug 2025275 PMAQI
1st Aug 2025296 PMAQI
1st Aug 2025287 PMAQI
1st Aug 2025288 PMAQI
1st Aug 2025479 PMAQI
1st Aug 20253510 PMAQI
1st Aug 20252311 PMAQI
2nd Aug 20252612 AMAQI
2nd Aug 2025261 AMAQI
2nd Aug 2025262 AMAQI
2nd Aug 2025353 AMAQI
2nd Aug 2025364 AMAQI

18°C11/24°C

2nd Aug 2025365 AMAQI
5 AM
2nd Aug 2025366 AMAQI
2nd Aug 2025347 AMAQI
2nd Aug 2025338 AMAQI
2nd Aug 2025319 AMAQI
2nd Aug 20253010 AMAQI
2nd Aug 20253311 AMAQI
2nd Aug 20253712 PMAQI
12 PM
2nd Aug 2025291 PMAQI
2nd Aug 2025292 PMAQI
2nd Aug 2025323 PMAQI
8 PM
12 AM
4 AM

--°C/°C

Day time
Avg. Highest Time
5 AM - 8 PM

45AQI

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

45AQI

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. 45), while the lowest AQI was between 5 AM to 8 PM (Avg. 45).
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

Kitchener, Waterloo, Ontario, Canada

2025

87%

185

13%

28

Total number of days with different AQI categories in last 214 days in 2025 (151 days remaining)

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

Under WHO’s Safe Air Quality Limits: 87%

Health Risk Level:

Low

In 2025, 87% 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

Kitchener, Waterloo, 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
21AQI
3rd January 2025
24AQI
4th January 2025
28AQI
5th January 2025
27AQI
6th January 2025
23AQI
7th January 2025
24AQI
8th January 2025
28AQI
9th January 2025
29AQI
10th January 2025
46AQI
11th January 2025
63AQI
12th January 2025
46AQI
13th January 2025
38AQI
14th January 2025
25AQI
15th January 2025
24AQI
16th January 2025
50AQI
17th January 2025
38AQI
18th January 2025
29AQI
19th January 2025
27AQI
20th January 2025
25AQI
21st January 2025
24AQI
22nd January 2025
31AQI
23rd January 2025
40AQI
24th January 2025
26AQI
25th January 2025
49AQI
26th January 2025
31AQI
27th January 2025
27AQI
28th January 2025
29AQI
29th January 2025
28AQI
30th January 2025
25AQI
31st January 2025
54AQI
1st February 2025
27AQI
2nd February 2025
31AQI
3rd February 2025
55AQI
4th February 2025
27AQI
5th February 2025
24AQI
6th February 2025
33AQI
7th February 2025
28AQI
8th February 2025
38AQI
9th February 2025
34AQI
10th February 2025
29AQI
11th February 2025
39AQI
12th February 2025
26AQI
13th February 2025
27AQI
14th February 2025
30AQI
15th February 2025
33AQI
16th February 2025
29AQI
17th February 2025
28AQI
18th February 2025
27AQI
19th February 2025
25AQI
20th February 2025
22AQI
21st February 2025
28AQI
22nd February 2025
51AQI
23rd February 2025
59AQI
24th February 2025
54AQI
25th February 2025
59AQI
26th February 2025
32AQI
27th February 2025
41AQI
28th February 2025
26AQI
1st March 2025
30AQI
2nd March 2025
28AQI
3rd March 2025
32AQI
4th March 2025
36AQI
5th March 2025
39AQI
6th March 2025
27AQI
7th March 2025
32AQI
8th March 2025
33AQI
9th March 2025
30AQI
10th March 2025
31AQI
11th March 2025
31AQI
12th March 2025
27AQI
13th March 2025
31AQI
14th March 2025
57AQI
15th March 2025
57AQI
16th March 2025
25AQI
17th March 2025
16AQI
18th March 2025
24AQI
19th March 2025
33AQI
20th March 2025
24AQI
21st March 2025
17AQI
22nd March 2025
17AQI
23rd March 2025
19AQI
24th March 2025
21AQI
25th March 2025
18AQI
26th March 2025
18AQI
27th March 2025
25AQI
28th March 2025
28AQI
29th March 2025
37AQI
30th March 2025
23AQI
31st March 2025
21AQI
1st April 2025
17AQI
2nd April 2025
17AQI
3rd April 2025
23AQI
4th April 2025
18AQI
5th April 2025
19AQI
6th April 2025
17AQI
7th April 2025
19AQI
8th April 2025
14AQI
9th April 2025
18AQI
10th April 2025
32AQI
11th April 2025
29AQI
12th April 2025
24AQI
13th April 2025
37AQI
14th April 2025
28AQI
15th April 2025
17AQI
16th April 2025
13AQI
17th April 2025
19AQI
18th April 2025
37AQI
19th April 2025
40AQI
20th April 2025
17AQI
21st April 2025
22AQI
22nd April 2025
14AQI
23rd April 2025
34AQI
24th April 2025
39AQI
25th April 2025
35AQI
26th April 2025
27AQI
27th April 2025
15AQI
28th April 2025
23AQI
29th April 2025
33AQI
30th April 2025
17AQI
1st May 2025
33AQI
2nd May 2025
30AQI
3rd May 2025
18AQI
4th May 2025
17AQI
5th May 2025
19AQI
6th May 2025
21AQI
7th May 2025
36AQI
8th May 2025
20AQI
9th May 2025
21AQI
10th May 2025
28AQI
11th May 2025
25AQI
12th May 2025
30AQI
13th May 2025
37AQI
14th May 2025
22AQI
15th May 2025
31AQI
16th May 2025
30AQI
17th May 2025
28AQI
18th May 2025
18AQI
19th May 2025
15AQI
20th May 2025
16AQI
21st May 2025
17AQI
22nd May 2025
12AQI
23rd May 2025
11AQI
24th May 2025
12AQI
25th May 2025
17AQI
26th May 2025
22AQI
27th May 2025
28AQI
28th May 2025
24AQI
29th May 2025
29AQI
30th May 2025
36AQI
31st May 2025
28AQI
1st June 2025
19AQI
2nd June 2025
24AQI
3rd June 2025
41AQI
4th June 2025
73AQI
5th June 2025
54AQI
6th June 2025
64AQI
7th June 2025
65AQI
8th June 2025
82AQI
9th June 2025
67AQI
10th June 2025
56AQI
11th June 2025
62AQI
12th June 2025
67AQI
13th June 2025
46AQI
14th June 2025
35AQI
15th June 2025
37AQI
16th June 2025
38AQI
17th June 2025
42AQI
18th June 2025
40AQI
19th June 2025
28AQI
20th June 2025
38AQI
21st June 2025
47AQI
22nd June 2025
49AQI
23rd June 2025
52AQI
24th June 2025
55AQI
25th June 2025
46AQI
26th June 2025
40AQI
27th June 2025
37AQI
28th June 2025
32AQI
29th June 2025
36AQI
30th June 2025
40AQI
1st July 2025
37AQI
2nd July 2025
40AQI
3rd July 2025
45AQI
4th July 2025
40AQI
5th July 2025
44AQI
6th July 2025
51AQI
7th July 2025
47AQI
8th July 2025
34AQI
9th July 2025
43AQI
10th July 2025
38AQI
11th July 2025
47AQI
12th July 2025
44AQI
13th July 2025
45AQI
14th July 2025
46AQI
15th July 2025
59AQI
16th July 2025
67AQI
17th July 2025
48AQI
18th July 2025
25AQI
19th July 2025
35AQI
20th July 2025
24AQI
21st July 2025
47AQI
22nd July 2025
23AQI
23rd July 2025
26AQI
24th July 2025
36AQI
25th July 2025
32AQI
26th July 2025
57AQI
27th July 2025
41AQI
28th July 2025
51AQI
29th July 2025
43AQI
30th July 2025
51AQI
31st July 2025
99AQI
1st August 2025
60AQI

32AQI

34AQI

29AQI

24AQI

24AQI

47AQI

44AQI

60AQI

No. of days

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

202533AQI

29
2
23
5
29
2
30
31
19
11
24
7
1
185
28

Highest AQI recorded in

August

60AQI

Lowest AQI recorded in

May

24AQI

202433AQI

27
4
24
5
31
30
29
2
25
3
29
2
24
7
23
7
28
3
30
30
1
330
34

Highest AQI recorded in

January

37AQI

Lowest AQI recorded in

November

25AQI

202342AQI

24
7
22
6
25
6
25
5
29
2
10
14
6
21
10
19
12
28
2
29
2
25
4
24
7
281
77
6

Highest AQI recorded in

June

72AQI

Lowest AQI recorded in

October

30AQI

202235AQI

26
5
19
2
27
4
29
27
4
24
6
19
5
1
25
3
29
2
25
5
26
5
277
41

Highest AQI recorded in

June

39AQI

Lowest AQI recorded in

August

17AQI

202137AQI

24
5
1
25
3
27
4
28
2
25
6
25
5
23
8
23
8
26
4
28
3
25
5
27
4
306
57
1

Highest AQI recorded in

July

46AQI

Lowest AQI recorded in

October

30AQI

202032AQI

11
2
21
18
29
1
31
31
28
2
31
26
4
25
6
251
15

Highest AQI recorded in

November

35AQI

Lowest AQI recorded in

October

24AQI

Most & Least Polluted Years Over the Last 6 Years

Most Polluted Year Recorded
2023(Avg.)
42AQI
Least Polluted Year Recorded
2020(Avg.)
32AQI

Kitchener's annual 2025 AQI (33) shows an average percentage change of -5.2% (improved AQI) compared to previous years: 2020 (32), 2021 (37), 2022 (35), 2023 (42), 2024 (33).