Mont-Saint-Hilaire AQI Trends
Mont-Saint-Hilaire AQI was measured across 2024-2025, with a trend delta of n/a AQI points. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Quebec, Canada.
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Average EPA AQI
37
Rank 30 of 158 cities by average AQI
PM2.5
8.5
ug/m3 annualized city average
Seasonality
January
Cleanest: April
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Mont-Saint-Hilaire
54
-
23
20
37
49
48
35
28
28
28
50
What this trends page measures
Compare yearly air-quality direction, best years, worst years, and trend deltas.
For Mont-Saint-Hilaire, the current global analytics build covers 314 daily rows from 2024-01-01 to 2025-01-01. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.