Shawinigan Seasonal Pollution
Shawinigan usually records its highest OpenAQ-derived EPA AQI in August and its cleanest month in April. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Quebec, Canada.
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Average EPA AQI
31
Rank 78 of 158 cities by average AQI
PM2.5
6.1
ug/m3 annualized city average
Seasonality
August
Cleanest: April
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Shawinigan
31
33
23
18
28
34
39
42
34
30
23
36
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Shawinigan, the current global analytics build covers 367 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.