Northampton Seasonal Pollution
Northampton usually records its highest OpenAQ-derived EPA AQI in November and its cleanest month in April. The page uses OpenAQ-derived daily history for 1 mapped monitoring location in Northamptonshire, United Kingdom.
Search city analytics
Average EPA AQI
47
Rank 20 of 171 cities by average AQI
PM2.5
9.5
ug/m3 annualized city average
Seasonality
November
Cleanest: April
Health indicator
0.4
cigarette-equivalent per day
Yearly EPA AQI trend
Seasonal EPA AQI heatmap
JanFebMarAprMayJunJulAugSepOctNovDec
Northampton
-
-
42
36
49
47
44
43
53
53
58
45
What this seasonality page measures
Find each city's worst and cleanest months from daily OpenAQ-derived EPA AQI.
For Northampton, the current global analytics build covers 223 daily rows from 2024-03-26 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.