Country Background
HistoryAQIPM2.5PM10COSO2NO2O3

Analyse Historique de la Qualité de l'Air à St Catharines, Ontario, Canada

Plongez dans des détails sur la qualité de l'air avec des données historiques, des tendances mensuelles et annuelles à portée de main !

Bon
050
Modéré
100
Pauvre
150
Non sain
200
Sévère
300
Dangereux
301+

Analyse de la qualité de l'air de Août

St Catharines, Ontario, Canada

2021
2022
2023
2024
2025
AQI
.
Jours

Tendances AQI : Le plus élevé et le plus bas

AQI le plus élevé enregistré le
4th Aug 2025
106AQI
AQI le plus bas enregistré le
18th Aug 2025
16AQI

Analyse du même jour (19th August ):
Ce jour-là, l'AQI au cours des 5 années a varié de manière significative : 2025 se classe 3rd le plus élevé AQI à 21 de Bon qualité de l'air, montrant une amélioration par rapport à 2023 et 2021 le même jour.

Télécharger les données annuelles 2024

Rapport mondial sur la qualité de l'air

Globe

Tendance AQI Jour & Nuit : 19th Aug - 20th Aug 2025

St Catharines, Ontario, Canada

AQI
Jour
Nuit
.

6 AM19th Aug 2025

8 PM

5 AM20th Aug 2025

Heure du jour
Heure moyenne la plus haute
8PM19th Aug

29AQI

Heure moyenne la plus basse
8AM19th Aug

16AQI

Heure de la nuit
Heure moyenne la plus haute
12AM20th Aug

27AQI

Heure moyenne la plus basse
9PM19th Aug

20AQI

Au cours des 24 dernières heures,

L'AQI de St Catharines a atteint son point le plus élevé de 29 à 8 PM pendant le Jour, tandis que le point le plus bas, 16, a été enregistré à 8 AM pendant le Jour entre 19th Aug et 20th Aug 2025.

Tendance AQI Jour & Nuit : Jul - Aug 2025

St Catharines, Ontario, Canada

JulAug
21st - 22nd22nd - 23rd23rd - 24th24th - 25th25th - 26th26th - 27th27th - 28th28th - 29th29th - 30th30th - 31st31st - 01st01st - 02nd02nd - 03rd03rd - 04th04th - 05th05th - 06th06th - 07th07th - 08th08th - 09th09th - 10th10th - 11th11th - 12th12th - 13th13th - 14th14th - 15th15th - 16th16th - 17th17th - 18th18th - 19th19th - 20th20th
Jour
Nuit
21st Jul 2025586 AMAQI
21st Jul 2025587 AMAQI
21st Jul 2025588 AMAQI
21st Jul 2025569 AMAQI
21st Jul 20255610 AMAQI
21st Jul 20255611 AMAQI
21st Jul 20255212 PMAQI
21st Jul 2025461 PMAQI
21st Jul 2025372 PMAQI
21st Jul 2025343 PMAQI
21st Jul 2025384 PMAQI
21st Jul 2025385 PMAQI
21st Jul 2025376 PMAQI
21st Jul 2025387 PMAQI
21st Jul 2025388 PMAQI
21st Jul 2025469 PMAQI
21st Jul 20254610 PMAQI
21st Jul 20253611 PMAQI
22nd Jul 20254012 AMAQI
22nd Jul 2025431 AMAQI
22nd Jul 2025402 AMAQI
22nd Jul 2025443 AMAQI
22nd Jul 2025364 AMAQI
22nd Jul 2025325 AMAQI

--°C/°C

22nd Jul 2025296 AMAQI
22nd Jul 2025257 AMAQI
22nd Jul 2025268 AMAQI
22nd Jul 2025289 AMAQI
22nd Jul 20252810 AMAQI
22nd Jul 20252411 AMAQI
22nd Jul 20252312 PMAQI
22nd Jul 2025221 PMAQI
22nd Jul 2025222 PMAQI
22nd Jul 2025243 PMAQI
22nd Jul 2025234 PMAQI
22nd Jul 2025255 PMAQI
22nd Jul 2025266 PMAQI
22nd Jul 2025247 PMAQI
22nd Jul 2025258 PMAQI
22nd Jul 2025259 PMAQI
22nd Jul 20252510 PMAQI
22nd Jul 20252411 PMAQI
23rd Jul 20252412 AMAQI
23rd Jul 2025251 AMAQI
23rd Jul 2025262 AMAQI
23rd Jul 2025233 AMAQI
23rd Jul 2025224 AMAQI
23rd Jul 2025215 AMAQI

20°C14/26°C

23rd Jul 2025206 AMAQI
23rd Jul 2025217 AMAQI
23rd Jul 2025248 AMAQI
23rd Jul 2025269 AMAQI
23rd Jul 20252610 AMAQI
23rd Jul 20252211 AMAQI
23rd Jul 20252312 PMAQI
23rd Jul 2025221 PMAQI
23rd Jul 2025222 PMAQI
23rd Jul 2025263 PMAQI
23rd Jul 2025254 PMAQI
23rd Jul 2025245 PMAQI
23rd Jul 2025276 PMAQI
23rd Jul 2025257 PMAQI
23rd Jul 2025258 PMAQI
23rd Jul 2025249 PMAQI
23rd Jul 20252410 PMAQI
23rd Jul 20252711 PMAQI
24th Jul 20252812 AMAQI
24th Jul 2025291 AMAQI
24th Jul 2025312 AMAQI
24th Jul 2025383 AMAQI
24th Jul 2025364 AMAQI
24th Jul 2025385 AMAQI

23°C14/30°C

24th Jul 2025406 AMAQI
24th Jul 2025447 AMAQI
24th Jul 2025448 AMAQI
24th Jul 2025449 AMAQI
24th Jul 20254610 AMAQI
24th Jul 20254511 AMAQI
24th Jul 20254612 PMAQI
24th Jul 2025461 PMAQI
24th Jul 2025482 PMAQI
24th Jul 2025483 PMAQI
24th Jul 2025464 PMAQI
24th Jul 2025485 PMAQI
24th Jul 2025486 PMAQI
24th Jul 2025467 PMAQI
24th Jul 2025438 PMAQI
24th Jul 2025439 PMAQI
24th Jul 20254410 PMAQI
24th Jul 20254411 PMAQI
25th Jul 20254212 AMAQI
25th Jul 2025401 AMAQI
25th Jul 2025322 AMAQI
25th Jul 2025293 AMAQI
25th Jul 2025284 AMAQI
25th Jul 2025275 AMAQI

26°C19/34°C

25th Jul 2025286 AMAQI
25th Jul 2025307 AMAQI
25th Jul 2025328 AMAQI
25th Jul 2025329 AMAQI
25th Jul 20253310 AMAQI
25th Jul 20253411 AMAQI
25th Jul 20253212 PMAQI
25th Jul 2025321 PMAQI
25th Jul 2025322 PMAQI
25th Jul 2025333 PMAQI
25th Jul 2025324 PMAQI
25th Jul 2025315 PMAQI
25th Jul 2025326 PMAQI
25th Jul 2025337 PMAQI
25th Jul 2025328 PMAQI
25th Jul 2025349 PMAQI
25th Jul 20253610 PMAQI
25th Jul 20254411 PMAQI
26th Jul 20254612 AMAQI
26th Jul 2025481 AMAQI
26th Jul 2025572 AMAQI
26th Jul 2025563 AMAQI
26th Jul 2025574 AMAQI
26th Jul 2025595 AMAQI

25°C23/28°C

26th Jul 2025606 AMAQI
26th Jul 2025587 AMAQI
26th Jul 2025548 AMAQI
26th Jul 2025619 AMAQI
26th Jul 20255910 AMAQI
26th Jul 20255911 AMAQI
26th Jul 20255412 PMAQI
26th Jul 2025531 PMAQI
26th Jul 2025532 PMAQI
26th Jul 2025523 PMAQI
26th Jul 2025504 PMAQI
26th Jul 2025535 PMAQI
26th Jul 2025546 PMAQI
26th Jul 2025537 PMAQI
26th Jul 2025528 PMAQI
26th Jul 2025539 PMAQI
26th Jul 20255310 PMAQI
26th Jul 20255111 PMAQI
27th Jul 20255112 AMAQI
27th Jul 2025501 AMAQI
27th Jul 2025332 AMAQI
27th Jul 2025283 AMAQI
27th Jul 2025284 AMAQI
27th Jul 2025295 AMAQI

25°C21/30°C

27th Jul 2025306 AMAQI
27th Jul 2025287 AMAQI
27th Jul 2025308 AMAQI
27th Jul 2025309 AMAQI
27th Jul 20252910 AMAQI
27th Jul 20253011 AMAQI
27th Jul 20253412 PMAQI
27th Jul 2025351 PMAQI
27th Jul 2025372 PMAQI
27th Jul 2025393 PMAQI
27th Jul 2025394 PMAQI
27th Jul 2025395 PMAQI
27th Jul 2025426 PMAQI
27th Jul 2025417 PMAQI
27th Jul 2025398 PMAQI
27th Jul 2025369 PMAQI
27th Jul 20253410 PMAQI
27th Jul 20253911 PMAQI
28th Jul 20254012 AMAQI
28th Jul 2025401 AMAQI
28th Jul 2025432 AMAQI
28th Jul 2025453 AMAQI
28th Jul 2025484 AMAQI
28th Jul 2025485 AMAQI

27°C23/32°C

28th Jul 2025526 AMAQI
28th Jul 2025527 AMAQI
28th Jul 2025538 AMAQI
28th Jul 2025559 AMAQI
28th Jul 20255610 AMAQI
28th Jul 20255311 AMAQI
28th Jul 20255312 PMAQI
28th Jul 2025531 PMAQI
28th Jul 2025472 PMAQI
28th Jul 2025513 PMAQI
28th Jul 2025534 PMAQI
28th Jul 2025525 PMAQI
28th Jul 2025536 PMAQI
28th Jul 2025537 PMAQI
28th Jul 2025538 PMAQI
28th Jul 2025529 PMAQI
28th Jul 20255110 PMAQI
28th Jul 20255011 PMAQI
29th Jul 20255112 AMAQI
29th Jul 2025511 AMAQI
29th Jul 2025472 AMAQI
29th Jul 2025503 AMAQI
29th Jul 2025484 AMAQI
29th Jul 2025465 AMAQI

26°C19/33°C

29th Jul 2025466 AMAQI
29th Jul 2025477 AMAQI
29th Jul 2025488 AMAQI
29th Jul 2025499 AMAQI
29th Jul 20255010 AMAQI
29th Jul 20254811 AMAQI
29th Jul 20254612 PMAQI
29th Jul 2025451 PMAQI
29th Jul 2025462 PMAQI
29th Jul 2025453 PMAQI
29th Jul 2025464 PMAQI
29th Jul 2025475 PMAQI
29th Jul 2025466 PMAQI
29th Jul 2025467 PMAQI
29th Jul 2025478 PMAQI
29th Jul 2025499 PMAQI
29th Jul 20254910 PMAQI
29th Jul 20254711 PMAQI
30th Jul 20254712 AMAQI
30th Jul 2025471 AMAQI
30th Jul 2025402 AMAQI
30th Jul 2025403 AMAQI
30th Jul 2025444 AMAQI
30th Jul 2025465 AMAQI

26°C21/32°C

30th Jul 2025436 AMAQI
30th Jul 2025447 AMAQI
30th Jul 2025478 AMAQI
30th Jul 2025489 AMAQI
30th Jul 20254910 AMAQI
30th Jul 20254811 AMAQI
30th Jul 20254912 PMAQI
30th Jul 2025461 PMAQI
30th Jul 2025432 PMAQI
30th Jul 2025463 PMAQI
30th Jul 2025484 PMAQI
30th Jul 2025495 PMAQI
30th Jul 2025496 PMAQI
30th Jul 2025497 PMAQI
30th Jul 2025498 PMAQI
30th Jul 2025499 PMAQI
30th Jul 20254910 PMAQI
30th Jul 20255011 PMAQI
31st Jul 20255012 AMAQI
31st Jul 2025531 AMAQI
31st Jul 2025572 AMAQI
31st Jul 2025603 AMAQI
31st Jul 2025624 AMAQI
31st Jul 2025665 AMAQI

25°C21/30°C

31st Jul 2025686 AMAQI
31st Jul 2025677 AMAQI
31st Jul 2025928 AMAQI
31st Jul 2025869 AMAQI
31st Jul 20257210 AMAQI
31st Jul 20255611 AMAQI
31st Jul 20259612 PMAQI
31st Jul 20251441 PMAQI
31st Jul 20251332 PMAQI
31st Jul 20251033 PMAQI
31st Jul 2025924 PMAQI
31st Jul 2025865 PMAQI
31st Jul 2025806 PMAQI
31st Jul 2025787 PMAQI
31st Jul 2025788 PMAQI
31st Jul 20251129 PMAQI
31st Jul 20259510 PMAQI
31st Jul 20258611 PMAQI
1st Aug 20258412 AMAQI
1st Aug 2025751 AMAQI
1st Aug 2025832 AMAQI
1st Aug 2025743 AMAQI
1st Aug 2025664 AMAQI
1st Aug 2025725 AMAQI

21°C17/26°C

1st Aug 2025646 AMAQI
1st Aug 2025607 AMAQI
1st Aug 2025608 AMAQI
1st Aug 2025589 AMAQI
1st Aug 20255410 AMAQI
1st Aug 20254611 AMAQI
1st Aug 20253612 PMAQI
1st Aug 2025301 PMAQI
1st Aug 2025272 PMAQI
1st Aug 2025263 PMAQI
1st Aug 2025244 PMAQI
1st Aug 2025235 PMAQI
1st Aug 2025206 PMAQI
1st Aug 2025217 PMAQI
1st Aug 2025208 PMAQI
1st Aug 2025439 PMAQI
1st Aug 20252910 PMAQI
1st Aug 20252411 PMAQI
2nd Aug 20253012 AMAQI
2nd Aug 2025361 AMAQI
2nd Aug 2025402 AMAQI
2nd Aug 2025363 AMAQI
2nd Aug 2025294 AMAQI
2nd Aug 2025325 AMAQI

20°C14/26°C

2nd Aug 2025316 AMAQI
2nd Aug 2025327 AMAQI
2nd Aug 2025308 AMAQI
2nd Aug 2025319 AMAQI
2nd Aug 20252910 AMAQI
2nd Aug 20253011 AMAQI
2nd Aug 20252812 PMAQI
2nd Aug 2025261 PMAQI
2nd Aug 2025242 PMAQI
2nd Aug 2025263 PMAQI
2nd Aug 2025264 PMAQI
2nd Aug 2025315 PMAQI
2nd Aug 2025426 PMAQI
2nd Aug 2025467 PMAQI
2nd Aug 2025458 PMAQI
2nd Aug 2025369 PMAQI
2nd Aug 20254410 PMAQI
2nd Aug 20255011 PMAQI
3rd Aug 20255412 AMAQI
3rd Aug 2025531 AMAQI
3rd Aug 2025542 AMAQI
3rd Aug 2025603 AMAQI
3rd Aug 2025664 AMAQI
3rd Aug 2025665 AMAQI

21°C15/26°C

3rd Aug 2025766 AMAQI
3rd Aug 2025867 AMAQI
3rd Aug 2025888 AMAQI
3rd Aug 2025879 AMAQI
3rd Aug 20259310 AMAQI
3rd Aug 20259211 AMAQI
3rd Aug 20258212 PMAQI
3rd Aug 2025761 PMAQI
3rd Aug 2025792 PMAQI
3rd Aug 2025803 PMAQI
3rd Aug 2025864 PMAQI
3rd Aug 2025945 PMAQI
3rd Aug 2025866 PMAQI
3rd Aug 2025827 PMAQI
3rd Aug 2025838 PMAQI
3rd Aug 2025759 PMAQI
3rd Aug 20259010 PMAQI
3rd Aug 202511611 PMAQI
4th Aug 202510812 AMAQI
4th Aug 2025901 AMAQI
4th Aug 2025812 AMAQI
4th Aug 2025893 AMAQI
4th Aug 2025964 AMAQI
4th Aug 2025775 AMAQI

22°C14/30°C

4th Aug 2025766 AMAQI
4th Aug 2025787 AMAQI
4th Aug 2025808 AMAQI
4th Aug 20251109 AMAQI
4th Aug 202513110 AMAQI
4th Aug 202513611 AMAQI
4th Aug 202513812 PMAQI
4th Aug 20251361 PMAQI
4th Aug 20251292 PMAQI
4th Aug 20251323 PMAQI
4th Aug 20251244 PMAQI
4th Aug 20251145 PMAQI
4th Aug 20251086 PMAQI
4th Aug 20251007 PMAQI
4th Aug 2025988 PMAQI
4th Aug 20251199 PMAQI
4th Aug 202511110 PMAQI
4th Aug 202510211 PMAQI
5th Aug 202510412 AMAQI
5th Aug 2025981 AMAQI
5th Aug 2025962 AMAQI
5th Aug 20251003 AMAQI
5th Aug 20251044 AMAQI
5th Aug 20251045 AMAQI

22°C16/29°C

5th Aug 20251026 AMAQI
5th Aug 20251017 AMAQI
5th Aug 20251048 AMAQI
5th Aug 2025989 AMAQI
5th Aug 202510010 AMAQI
5th Aug 20259811 AMAQI
5th Aug 20259912 PMAQI
5th Aug 20251011 PMAQI
5th Aug 2025992 PMAQI
5th Aug 2025973 PMAQI
5th Aug 2025934 PMAQI
5th Aug 2025905 PMAQI
5th Aug 2025926 PMAQI
5th Aug 2025937 PMAQI
5th Aug 2025988 PMAQI
5th Aug 20251009 PMAQI
5th Aug 20259610 PMAQI
5th Aug 20259211 PMAQI
6th Aug 20258312 AMAQI
6th Aug 2025851 AMAQI
6th Aug 2025872 AMAQI
6th Aug 2025863 AMAQI
6th Aug 2025844 AMAQI
6th Aug 2025805 AMAQI

23°C16/31°C

6th Aug 2025806 AMAQI
6th Aug 2025797 AMAQI
6th Aug 2025708 AMAQI
6th Aug 2025709 AMAQI
6th Aug 20257410 AMAQI
6th Aug 20257311 AMAQI
6th Aug 20257212 PMAQI
6th Aug 2025771 PMAQI
6th Aug 2025732 PMAQI
6th Aug 2025763 PMAQI
6th Aug 2025874 PMAQI
6th Aug 2025825 PMAQI
6th Aug 2025756 PMAQI
6th Aug 2025727 PMAQI
6th Aug 2025668 PMAQI
6th Aug 2025749 PMAQI
6th Aug 20257810 PMAQI
6th Aug 20258011 PMAQI
7th Aug 20258212 AMAQI
7th Aug 2025781 AMAQI
7th Aug 2025672 AMAQI
7th Aug 2025783 AMAQI
7th Aug 2025814 AMAQI
7th Aug 2025795 AMAQI

24°C19/31°C

7th Aug 2025746 AMAQI
7th Aug 2025697 AMAQI
7th Aug 2025708 AMAQI
7th Aug 2025829 AMAQI
7th Aug 20258210 AMAQI
7th Aug 20258211 AMAQI
7th Aug 20258412 PMAQI
7th Aug 2025801 PMAQI
7th Aug 2025812 PMAQI
7th Aug 2025813 PMAQI
7th Aug 2025814 PMAQI
7th Aug 2025785 PMAQI
7th Aug 2025786 PMAQI
7th Aug 2025787 PMAQI
7th Aug 2025798 PMAQI
7th Aug 2025779 PMAQI
7th Aug 20257510 PMAQI
7th Aug 20257911 PMAQI
8th Aug 20258112 AMAQI
8th Aug 2025781 AMAQI
8th Aug 2025802 AMAQI
8th Aug 2025873 AMAQI
8th Aug 2025884 AMAQI
8th Aug 2025805 AMAQI

24°C19/31°C

8th Aug 2025856 AMAQI
8th Aug 2025887 AMAQI
8th Aug 2025908 AMAQI
8th Aug 2025879 AMAQI
8th Aug 20258710 AMAQI
8th Aug 20258811 AMAQI
8th Aug 20258612 PMAQI
8th Aug 2025861 PMAQI
8th Aug 2025842 PMAQI
8th Aug 2025803 PMAQI
8th Aug 2025804 PMAQI
8th Aug 2025785 PMAQI
8th Aug 2025796 PMAQI
8th Aug 2025797 PMAQI
8th Aug 2025788 PMAQI
8th Aug 2025829 PMAQI
8th Aug 20258310 PMAQI
8th Aug 20257511 PMAQI
9th Aug 20257812 AMAQI
9th Aug 2025771 AMAQI
9th Aug 2025692 AMAQI
9th Aug 2025703 AMAQI
9th Aug 2025704 AMAQI
9th Aug 2025735 AMAQI

24°C18/31°C

9th Aug 2025706 AMAQI
9th Aug 2025697 AMAQI
9th Aug 2025688 AMAQI
9th Aug 2025709 AMAQI
9th Aug 20256810 AMAQI
9th Aug 20256711 AMAQI
9th Aug 20256612 PMAQI
9th Aug 2025661 PMAQI
9th Aug 2025642 PMAQI
9th Aug 2025633 PMAQI
9th Aug 2025644 PMAQI
9th Aug 2025645 PMAQI
9th Aug 2025666 PMAQI
9th Aug 2025637 PMAQI
9th Aug 2025648 PMAQI
9th Aug 2025669 PMAQI
9th Aug 20256710 PMAQI
9th Aug 20256511 PMAQI
10th Aug 20256512 AMAQI
10th Aug 2025651 AMAQI
10th Aug 2025642 AMAQI
10th Aug 2025633 AMAQI
10th Aug 2025634 AMAQI
10th Aug 2025615 AMAQI

26°C20/33°C

10th Aug 2025626 AMAQI
10th Aug 2025627 AMAQI
10th Aug 2025598 AMAQI
10th Aug 2025589 AMAQI
10th Aug 20255610 AMAQI
10th Aug 20255411 AMAQI
10th Aug 20255612 PMAQI
10th Aug 2025561 PMAQI
10th Aug 2025572 PMAQI
10th Aug 2025603 PMAQI
10th Aug 2025614 PMAQI
10th Aug 2025625 PMAQI
10th Aug 2025626 PMAQI
10th Aug 2025627 PMAQI
10th Aug 2025618 PMAQI
10th Aug 2025619 PMAQI
10th Aug 20256210 PMAQI
10th Aug 20256111 PMAQI
11th Aug 20256212 AMAQI
11th Aug 2025641 AMAQI
11th Aug 2025662 AMAQI
11th Aug 2025643 AMAQI
11th Aug 2025594 AMAQI
11th Aug 2025595 AMAQI

27°C20/35°C

11th Aug 2025586 AMAQI
11th Aug 2025567 AMAQI
11th Aug 2025558 AMAQI
11th Aug 2025529 AMAQI
11th Aug 20255210 AMAQI
11th Aug 20255211 AMAQI
11th Aug 20255212 PMAQI
11th Aug 2025541 PMAQI
11th Aug 2025542 PMAQI
11th Aug 2025543 PMAQI
11th Aug 2025544 PMAQI
11th Aug 2025565 PMAQI
11th Aug 2025566 PMAQI
11th Aug 2025567 PMAQI
11th Aug 2025568 PMAQI
11th Aug 2025579 PMAQI
11th Aug 20255610 PMAQI
11th Aug 20255611 PMAQI
12th Aug 20255612 AMAQI
12th Aug 2025561 AMAQI
12th Aug 2025582 AMAQI
12th Aug 2025583 AMAQI
12th Aug 2025574 AMAQI
12th Aug 2025585 AMAQI

27°C22/34°C

12th Aug 2025576 AMAQI
12th Aug 2025587 AMAQI
12th Aug 2025568 AMAQI
12th Aug 2025569 AMAQI
12th Aug 20255710 AMAQI
12th Aug 20255611 AMAQI
12th Aug 20255612 PMAQI
12th Aug 2025541 PMAQI
12th Aug 2025562 PMAQI
12th Aug 2025563 PMAQI
12th Aug 2025544 PMAQI
12th Aug 2025535 PMAQI
12th Aug 2025526 PMAQI
12th Aug 2025527 PMAQI
12th Aug 2025508 PMAQI
12th Aug 2025559 PMAQI
12th Aug 20255210 PMAQI
12th Aug 20254811 PMAQI
13th Aug 20254512 AMAQI
13th Aug 2025501 AMAQI
13th Aug 2025502 AMAQI
13th Aug 2025493 AMAQI
13th Aug 2025524 AMAQI
13th Aug 2025465 AMAQI

26°C22/32°C

13th Aug 2025426 AMAQI
13th Aug 2025367 AMAQI
13th Aug 2025348 AMAQI
13th Aug 2025349 AMAQI
13th Aug 20253210 AMAQI
13th Aug 20253011 AMAQI
13th Aug 20252912 PMAQI
13th Aug 2025311 PMAQI
13th Aug 2025322 PMAQI
13th Aug 2025333 PMAQI
13th Aug 2025364 PMAQI
13th Aug 2025385 PMAQI
13th Aug 2025436 PMAQI
13th Aug 2025497 PMAQI
13th Aug 2025538 PMAQI
13th Aug 2025389 PMAQI
13th Aug 20254010 PMAQI
13th Aug 20254311 PMAQI
14th Aug 20254512 AMAQI
14th Aug 2025481 AMAQI
14th Aug 2025542 AMAQI
14th Aug 2025543 AMAQI
14th Aug 2025484 AMAQI
14th Aug 2025425 AMAQI

26°C22/33°C

14th Aug 2025326 AMAQI
14th Aug 2025297 AMAQI
14th Aug 2025378 AMAQI
14th Aug 2025429 AMAQI
14th Aug 20254910 AMAQI
14th Aug 20254911 AMAQI
14th Aug 20254112 PMAQI
14th Aug 2025431 PMAQI
14th Aug 2025432 PMAQI
14th Aug 2025393 PMAQI
14th Aug 2025474 PMAQI
14th Aug 2025495 PMAQI
14th Aug 2025556 PMAQI
14th Aug 2025567 PMAQI
14th Aug 2025558 PMAQI
14th Aug 2025549 PMAQI
14th Aug 20255610 PMAQI
14th Aug 20255911 PMAQI
15th Aug 20256112 AMAQI
15th Aug 2025601 AMAQI
15th Aug 2025602 AMAQI
15th Aug 2025613 AMAQI
15th Aug 2025624 AMAQI
15th Aug 2025625 AMAQI

24°C19/30°C

15th Aug 2025646 AMAQI
15th Aug 2025627 AMAQI
15th Aug 2025638 AMAQI
15th Aug 2025679 AMAQI
15th Aug 20256210 AMAQI
15th Aug 20256011 AMAQI
15th Aug 20256212 PMAQI
15th Aug 2025581 PMAQI
15th Aug 2025602 PMAQI
15th Aug 2025613 PMAQI
15th Aug 2025594 PMAQI
15th Aug 2025565 PMAQI
15th Aug 2025566 PMAQI
15th Aug 2025557 PMAQI
15th Aug 2025558 PMAQI
15th Aug 2025609 PMAQI
15th Aug 20255510 PMAQI
15th Aug 20255511 PMAQI
16th Aug 20255512 AMAQI
16th Aug 2025551 AMAQI
16th Aug 2025562 AMAQI
16th Aug 2025563 AMAQI
16th Aug 2025564 AMAQI
16th Aug 2025555 AMAQI

24°C16/32°C

16th Aug 2025546 AMAQI
16th Aug 2025567 AMAQI
16th Aug 2025558 AMAQI
16th Aug 2025569 AMAQI
16th Aug 20255610 AMAQI
16th Aug 20255511 AMAQI
16th Aug 20255712 PMAQI
16th Aug 2025581 PMAQI
16th Aug 2025582 PMAQI
16th Aug 2025603 PMAQI
16th Aug 2025604 PMAQI
16th Aug 2025605 PMAQI
16th Aug 2025606 PMAQI
16th Aug 2025617 PMAQI
16th Aug 2025608 PMAQI
16th Aug 2025579 PMAQI
16th Aug 20255710 PMAQI
16th Aug 20255811 PMAQI
17th Aug 20255812 AMAQI
17th Aug 2025581 AMAQI
17th Aug 2025582 AMAQI
17th Aug 2025573 AMAQI
17th Aug 2025594 AMAQI
17th Aug 2025585 AMAQI

25°C18/32°C

17th Aug 2025576 AMAQI
17th Aug 2025557 AMAQI
17th Aug 2025568 AMAQI
17th Aug 2025559 AMAQI
17th Aug 20255010 AMAQI
17th Aug 20254611 AMAQI
17th Aug 20254212 PMAQI
17th Aug 2025371 PMAQI
17th Aug 2025382 PMAQI
17th Aug 2025343 PMAQI
17th Aug 2025354 PMAQI
17th Aug 2025355 PMAQI
17th Aug 2025356 PMAQI
17th Aug 2025317 PMAQI
17th Aug 2025228 PMAQI
17th Aug 2025449 PMAQI
17th Aug 20253110 PMAQI
17th Aug 20251811 PMAQI
18th Aug 20251912 AMAQI
18th Aug 2025201 AMAQI
18th Aug 2025182 AMAQI
18th Aug 2025183 AMAQI
18th Aug 2025164 AMAQI
18th Aug 2025155 AMAQI

22°C18/25°C

18th Aug 2025146 AMAQI
18th Aug 2025147 AMAQI
18th Aug 2025148 AMAQI
18th Aug 2025159 AMAQI
18th Aug 20251510 AMAQI
18th Aug 20251411 AMAQI
18th Aug 20251412 PMAQI
18th Aug 2025141 PMAQI
18th Aug 2025142 PMAQI
18th Aug 2025143 PMAQI
18th Aug 2025144 PMAQI
18th Aug 2025145 PMAQI
18th Aug 2025146 PMAQI
18th Aug 2025157 PMAQI
18th Aug 2025168 PMAQI
18th Aug 2025169 PMAQI
18th Aug 20251610 PMAQI
18th Aug 20251811 PMAQI
19th Aug 20251812 AMAQI
19th Aug 2025191 AMAQI
19th Aug 2025182 AMAQI
19th Aug 2025183 AMAQI
19th Aug 2025174 AMAQI
19th Aug 2025175 AMAQI

20°C15/25°C

19th Aug 2025176 AMAQI
19th Aug 2025177 AMAQI
19th Aug 2025168 AMAQI
19th Aug 2025179 AMAQI
19th Aug 20251910 AMAQI
19th Aug 20252011 AMAQI
19th Aug 20252112 PMAQI
19th Aug 2025241 PMAQI
19th Aug 2025242 PMAQI
19th Aug 2025243 PMAQI
19th Aug 2025244 PMAQI
19th Aug 2025275 PMAQI
19th Aug 2025286 PMAQI
19th Aug 2025287 PMAQI
19th Aug 2025298 PMAQI
19th Aug 2025209 PMAQI
19th Aug 20252210 PMAQI
19th Aug 20252611 PMAQI
20th Aug 20252712 AMAQI
20th Aug 2025251 AMAQI
20th Aug 2025252 AMAQI
20th Aug 2025233 AMAQI
20th Aug 2025224 AMAQI
20th Aug 2025225 AMAQI

21°C13/31°C

20th Aug 2025236 AMAQI
6 AM
20th Aug 2025227 AMAQI
20th Aug 2025208 AMAQI
20th Aug 2025189 AMAQI
20th Aug 20251710 AMAQI
20th Aug 20251711 AMAQI
20th Aug 20251612 PMAQI
20th Aug 2025161 PMAQI
1 PM
20th Aug 2025152 PMAQI
20th Aug 2025163 PMAQI
20th Aug 2025144 PMAQI
20th Aug 2025155 PMAQI
20th Aug 2025146 PMAQI
20th Aug 2025147 PMAQI
20th Aug 2025148 PMAQI
8 PM
20th Aug 2025189 PMAQI
1 AM
5 AM

20°C18/22°C

Heure du jour
Heure moyenne la plus haute
6 AM - 8 PM

53AQI

15 heures / Jour
450 heures / Mois
Heure moyenne la plus basse
6 AM - 8 PM

53AQI

15 heures / Jour
450 heures / Mois
Au cours des 30 derniers jours, pendant la journée, l'AQI le plus élevé était entre 6 AM à 8 PM (Moyenne 53), tandis que l'AQI le plus bas était entre 6 AM à 8 PM (Moyenne 53).
Heure de la nuit
Heure moyenne la plus haute
12 AM - 11 PM

53AQI

9 heures / Jour
270 heures / Mois
Heure moyenne la plus basse
12 AM - 11 PM

53AQI

9 heures / Jour
270 heures / Mois
Au cours des 30 derniers jours, pendant la journée, l'AQI le plus élevé était entre 12 AM à 11 PM (Moyenne 53), tandis que l'AQI le plus bas était entre 12 AM à 11 PM (Moyenne 53).

Jours de 2025 Vs Qualité de l'Air

St Catharines, Ontario, Canada

2025

85%

197

14%

33

0.4%

1

Nombre total de jours avec différentes catégories AQI au cours des 233 derniers jours de 2025 (132 jours restants)

Bon
197 Jours
Modéré
33 Jours
Pauvre
1 Jours
Non sain
0 Jours
Sévère
0 Jours
Dangereux
0 Jours

Sous les limites sécuritaires de l'OMS pour la qualité de l'air : 85%

Niveau de risque sanitaire:

Faible

En 2025, 85% des 233 jours étaient dans les limites sécuritaires de l'OMS pour la qualité de l'air. Le risque de problèmes de santé est Faible, mais les effets à long terme, en particulier sur les personnes vulnérables, restent incertains.

Aperçus Annuels sur la Qualité de l'Air

St Catharines, Ontario, Canada

Niveaux AQI en 2025

AQI
PM2.5
PM10
CO
SO2
NO2
O3
Dim.Lun.Mar.Mer.Jeu.Ven.Sam.

Jan.

Fév.

Mar.

Avr.

Mai

Juin

Juil.

Août

Sep.

Oct.

Nov.

Déc.

1st Janvier 2025
25AQI
2nd Janvier 2025
24AQI
3rd Janvier 2025
22AQI
4th Janvier 2025
29AQI
5th Janvier 2025
26AQI
6th Janvier 2025
22AQI
7th Janvier 2025
22AQI
8th Janvier 2025
27AQI
9th Janvier 2025
27AQI
10th Janvier 2025
34AQI
11th Janvier 2025
53AQI
12th Janvier 2025
48AQI
13th Janvier 2025
36AQI
14th Janvier 2025
31AQI
15th Janvier 2025
23AQI
16th Janvier 2025
45AQI
17th Janvier 2025
44AQI
18th Janvier 2025
27AQI
19th Janvier 2025
25AQI
20th Janvier 2025
25AQI
21st Janvier 2025
24AQI
22nd Janvier 2025
28AQI
23rd Janvier 2025
37AQI
24th Janvier 2025
32AQI
25th Janvier 2025
45AQI
26th Janvier 2025
33AQI
27th Janvier 2025
32AQI
28th Janvier 2025
30AQI
29th Janvier 2025
27AQI
30th Janvier 2025
26AQI
31st Janvier 2025
46AQI
1st Février 2025
29AQI
2nd Février 2025
28AQI
3rd Février 2025
54AQI
4th Février 2025
25AQI
5th Février 2025
23AQI
6th Février 2025
32AQI
7th Février 2025
28AQI
8th Février 2025
35AQI
9th Février 2025
29AQI
10th Février 2025
30AQI
11th Février 2025
46AQI
12th Février 2025
29AQI
13th Février 2025
34AQI
14th Février 2025
30AQI
15th Février 2025
34AQI
16th Février 2025
33AQI
17th Février 2025
28AQI
18th Février 2025
27AQI
19th Février 2025
22AQI
20th Février 2025
21AQI
21st Février 2025
26AQI
22nd Février 2025
42AQI
23rd Février 2025
55AQI
24th Février 2025
48AQI
25th Février 2025
50AQI
26th Février 2025
40AQI
27th Février 2025
40AQI
28th Février 2025
27AQI
1st Mars 2025
29AQI
2nd Mars 2025
27AQI
3rd Mars 2025
30AQI
4th Mars 2025
35AQI
5th Mars 2025
32AQI
6th Mars 2025
25AQI
7th Mars 2025
32AQI
8th Mars 2025
33AQI
9th Mars 2025
30AQI
10th Mars 2025
32AQI
11th Mars 2025
31AQI
12th Mars 2025
28AQI
13th Mars 2025
26AQI
14th Mars 2025
53AQI
15th Mars 2025
54AQI
16th Mars 2025
27AQI
17th Mars 2025
16AQI
18th Mars 2025
21AQI
19th Mars 2025
28AQI
20th Mars 2025
24AQI
21st Mars 2025
17AQI
22nd Mars 2025
17AQI
23rd Mars 2025
19AQI
24th Mars 2025
21AQI
25th Mars 2025
20AQI
26th Mars 2025
19AQI
27th Mars 2025
21AQI
28th Mars 2025
26AQI
29th Mars 2025
25AQI
30th Mars 2025
28AQI
31st Mars 2025
22AQI
1st Avril 2025
16AQI
2nd Avril 2025
19AQI
3rd Avril 2025
26AQI
4th Avril 2025
17AQI
5th Avril 2025
19AQI
6th Avril 2025
18AQI
7th Avril 2025
19AQI
8th Avril 2025
14AQI
9th Avril 2025
18AQI
10th Avril 2025
27AQI
11th Avril 2025
27AQI
12th Avril 2025
28AQI
13th Avril 2025
36AQI
14th Avril 2025
26AQI
15th Avril 2025
19AQI
16th Avril 2025
13AQI
17th Avril 2025
19AQI
18th Avril 2025
33AQI
19th Avril 2025
46AQI
20th Avril 2025
16AQI
21st Avril 2025
22AQI
22nd Avril 2025
16AQI
23rd Avril 2025
29AQI
24th Avril 2025
30AQI
25th Avril 2025
50AQI
26th Avril 2025
34AQI
27th Avril 2025
14AQI
28th Avril 2025
25AQI
29th Avril 2025
33AQI
30th Avril 2025
19AQI
1st Mai 2025
30AQI
2nd Mai 2025
28AQI
3rd Mai 2025
17AQI
4th Mai 2025
17AQI
5th Mai 2025
18AQI
6th Mai 2025
19AQI
7th Mai 2025
28AQI
8th Mai 2025
17AQI
9th Mai 2025
22AQI
10th Mai 2025
24AQI
11th Mai 2025
21AQI
12th Mai 2025
27AQI
13th Mai 2025
32AQI
14th Mai 2025
19AQI
15th Mai 2025
27AQI
16th Mai 2025
27AQI
17th Mai 2025
28AQI
18th Mai 2025
17AQI
19th Mai 2025
17AQI
20th Mai 2025
14AQI
21st Mai 2025
15AQI
22nd Mai 2025
13AQI
23rd Mai 2025
12AQI
24th Mai 2025
13AQI
25th Mai 2025
13AQI
26th Mai 2025
19AQI
27th Mai 2025
30AQI
28th Mai 2025
23AQI
29th Mai 2025
18AQI
30th Mai 2025
31AQI
31st Mai 2025
27AQI
1st Juin 2025
16AQI
2nd Juin 2025
20AQI
3rd Juin 2025
34AQI
4th Juin 2025
55AQI
5th Juin 2025
48AQI
6th Juin 2025
58AQI
7th Juin 2025
58AQI
8th Juin 2025
74AQI
9th Juin 2025
60AQI
10th Juin 2025
41AQI
11th Juin 2025
53AQI
12th Juin 2025
64AQI
13th Juin 2025
39AQI
14th Juin 2025
29AQI
15th Juin 2025
37AQI
16th Juin 2025
35AQI
17th Juin 2025
33AQI
18th Juin 2025
36AQI
19th Juin 2025
25AQI
20th Juin 2025
34AQI
21st Juin 2025
49AQI
22nd Juin 2025
52AQI
23rd Juin 2025
53AQI
24th Juin 2025
55AQI
25th Juin 2025
44AQI
26th Juin 2025
38AQI
27th Juin 2025
35AQI
28th Juin 2025
30AQI
29th Juin 2025
36AQI
30th Juin 2025
42AQI
1st Juillet 2025
36AQI
2nd Juillet 2025
40AQI
3rd Juillet 2025
47AQI
4th Juillet 2025
31AQI
5th Juillet 2025
53AQI
6th Juillet 2025
51AQI
7th Juillet 2025
47AQI
8th Juillet 2025
29AQI
9th Juillet 2025
37AQI
10th Juillet 2025
46AQI
11th Juillet 2025
52AQI
12th Juillet 2025
44AQI
13th Juillet 2025
39AQI
14th Juillet 2025
48AQI
15th Juillet 2025
59AQI
16th Juillet 2025
61AQI
17th Juillet 2025
33AQI
18th Juillet 2025
21AQI
19th Juillet 2025
27AQI
20th Juillet 2025
24AQI
21st Juillet 2025
44AQI
22nd Juillet 2025
30AQI
23rd Juillet 2025
24AQI
24th Juillet 2025
41AQI
25th Juillet 2025
34AQI
26th Juillet 2025
53AQI
27th Juillet 2025
37AQI
28th Juillet 2025
49AQI
29th Juillet 2025
48AQI
30th Juillet 2025
47AQI
31st Juillet 2025
78AQI
1st Août 2025
50AQI
2nd Août 2025
34AQI
3rd Août 2025
77AQI
4th Août 2025
106AQI
5th Août 2025
99AQI
6th Août 2025
78AQI
7th Août 2025
78AQI
8th Août 2025
83AQI
9th Août 2025
68AQI
10th Août 2025
61AQI
11th Août 2025
57AQI
12th Août 2025
55AQI
13th Août 2025
42AQI
14th Août 2025
48AQI
15th Août 2025
60AQI
16th Août 2025
57AQI
17th Août 2025
45AQI
18th Août 2025
16AQI
19th Août 2025
21AQI

31AQI

34AQI

27AQI

24AQI

21AQI

43AQI

42AQI

60AQI

Nombre de jours

Jan.Fév.Mar.Avr.MaiJuinJuil.AoûtSep.Oct.Nov.Déc.Jours totaux

202534AQI

30
1
26
2
29
2
30
31
20
10
24
7
7
11
1
197
33
1

Le plus élevé AQI enregistré en

Août

60AQI

Le plus bas AQI enregistré en

Mai

21AQI

202432AQI

30
1
26
3
31
30
31
29
29
2
23
8
28
2
30
1
30
30
1
347
18

Le plus élevé AQI enregistré en

Février

37AQI

Le plus bas AQI enregistré en

Novembre

23AQI

202339AQI

28
3
27
1
30
1
27
3
28
3
11
13
4
2
23
6
2
22
9
29
1
30
1
29
27
3
311
44
6
2

Le plus élevé AQI enregistré en

Juin

73AQI

Le plus bas AQI enregistré en

Octobre

26AQI

202231AQI

29
2
22
29
2
17
31
29
1
19
1
1
1
29
30
1
27
3
29
2
292
12
1

Le plus élevé AQI enregistré en

Juillet

42AQI

Le plus bas AQI enregistré en

Août

20AQI

202133AQI

24
6
26
2
28
3
28
2
29
2
30
26
5
31
30
26
5
28
2
30
1
336
28

Le plus élevé AQI enregistré en

Février

38AQI

Le plus bas AQI enregistré en

Septembre

24AQI

202032AQI

13
21
18
30
30
1
31
28
2
29
2
27
3
26
5
253
13

Le plus élevé AQI enregistré en

Juin

36AQI

Le plus bas AQI enregistré en

Octobre

28AQI

Années les plus & moins polluées des 6 dernières années

Année la plus polluée enregistrée
2023(Moyenne)
39AQI
Année la moins polluée enregistrée
2022(Moyenne)
31AQI

La qualité de l'air annuelle de St Catharines pour l'année 2025 AQI (34) montre un changement moyen de pourcentage de 2.6% (empiré AQI) par rapport aux années précédentes : 2020 (32), 2021 (33), 2022 (31), 2023 (39), 2024 (32).