Kladno Seasonal Pollution
Kladno usually records its highest OpenAQ-derived EPA AQI in March and its cleanest month in September. The page uses OpenAQ-derived daily history for 3 mapped monitoring locations in Středočeský Kraj, Czech Republic.
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Average EPA AQI
48
Rank 40 of 61 cities by average AQI
PM2.5
12.3
ug/m3 annualized city average
Seasonality
March
Cleanest: September
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Kladno
60
39
68
46
51
44
41
39
30
48
52
50
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Kladno, the current global analytics build covers 306 daily rows from 2024-01-01 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.