Lohja Seasonal Pollution
Lohja usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in November. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Uusimaa, Finland.
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Average EPA AQI
24
Rank 7 of 22 cities by average AQI
PM2.5
4.6
ug/m3 annualized city average
Seasonality
January
Cleanest: November
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Lohja
39
25
39
24
28
22
25
27
29
21
16
19
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Lohja, the current global analytics build covers 311 daily rows from 2024-01-29 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.