Wŏnju Seasonal Pollution
Wŏnju usually records its highest OpenAQ-derived EPA AQI in April and its cleanest month in September. The page uses OpenAQ-derived daily history for 7 mapped monitoring locations in Gangwon, South Korea.
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Average EPA AQI
59
Rank 40 of 100 cities by average AQI
PM2.5
14.8
ug/m3 annualized city average
Seasonality
April
Cleanest: September
Health indicator
0.7
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Wŏnju
-
-
66
75
59
64
50
55
41
50
62
72
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Wŏnju, the current global analytics build covers 287 daily rows from 2024-03-19 to 2024-12-31. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.