Lappeenranta Seasonal Pollution
Lappeenranta usually records its highest OpenAQ-derived EPA AQI in May and its cleanest month in October. The page uses OpenAQ-derived daily history for 2 mapped monitoring locations in Etelä-Karjala, Finland.
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Average EPA AQI
26
Rank 5 of 22 cities by average AQI
PM2.5
4.8
ug/m3 annualized city average
Seasonality
May
Cleanest: October
Health indicator
0.2
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Lappeenranta
29
29
26
25
30
25
27
28
28
19
22
23
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Lappeenranta, the current global analytics build covers 331 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.