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Weather extremes
How extreme does Heerlen's weather get?
The hottest, coldest, wettest and snowiest days Heerlen has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days Heerlen has recorded — each shown against what a normal day that time of year looks like.
That is about 28°F hotter than a normal July afternoon in Heerlen (typical high near 75°F).
The three most extreme on record
About 36°F colder than a normal January night in Heerlen (typical low near 33°F).
The three most extreme on record
More rain in a single day than Heerlen usually gets in the whole month of June (typical June total about 2.7 in).
The three most extreme on record
How hot and cold it gets, month by month
The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.
Heerlen's record heat sits well above even a hot day for the season — July's 103°F is about 28°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.
In plain terms
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Maastricht, a weather station, about 16 km from the city centre. The underlying daily records come from NOAA's global station network.