Trondheim Seasonal Pollution
Trondheim usually records its highest OpenAQ-derived EPA AQI in May and its cleanest month in July. The page uses OpenAQ-derived daily history for 6 mapped monitoring locations in Trøndelag, Norway.
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Average EPA AQI
29
Rank 17 of 21 cities by average AQI
PM2.5
5.6
ug/m3 annualized city average
Seasonality
May
Cleanest: July
Health indicator
0.3
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Trondheim
35
28
27
31
38
24
19
21
27
37
29
27
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Trondheim, the current global analytics build covers 362 daily rows from 2024-01-03 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.