Siedlce Seasonal Pollution
Siedlce usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in June. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Mazowieckie, Poland.
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Average EPA AQI
66
Rank 19 of 155 cities by average AQI
PM2.5
17.8
ug/m3 annualized city average
Seasonality
March
Cleanest: June
Health indicator
0.8
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Siedlce
75
66
86
60
53
52
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What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Siedlce, the current global analytics build covers 166 daily rows from 2024-01-03 to 2024-06-26. The calculations normalize PM2.5 and PM10 observations into US EPA AQI bands so country, city, and tool pages use one consistent method.