Winnipeg Seasonal Pollution
Winnipeg usually records its highest OpenAQ-derived EPA AQI in July and its cleanest month in March. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Manitoba, Canada.
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Average EPA AQI
39
Rank 24 of 158 cities by average AQI
PM2.5
10.3
ug/m3 annualized city average
Seasonality
July
Cleanest: March
Health indicator
0.5
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Winnipeg
41
34
19
20
34
21
75
72
49
26
36
34
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Winnipeg, the current global analytics build covers 330 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.