Frøn Seasonal Pollution
Frøn usually records its highest OpenAQ-derived EPA AQI in January and its cleanest month in July. The page uses OpenAQ-derived daily history for 6 mapped monitoring locations in Oslo, Norway.
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Average EPA AQI
38
Rank 11 of 21 cities by average AQI
PM2.5
7.8
ug/m3 annualized city average
Seasonality
January
Cleanest: July
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Frøn
62
33
38
30
41
31
24
32
36
38
48
44
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Frøn, the current global analytics build covers 363 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.