Trenčín Seasonal Pollution
Trenčín usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in September. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Trenčin, Slovakia.
Search city analytics
Average EPA AQI
54
Rank 26 of 40 cities by average AQI
PM2.5
13.3
ug/m3 annualized city average
Seasonality
November
Cleanest: September
Health indicator
0.6
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Trenčín
66
53
56
48
46
49
51
53
38
48
70
63
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Trenčín, the current global analytics build covers 321 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.