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Weather extremes
How extreme does Basel's weather get?
The hottest, coldest, wettest and snowiest days Basel 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 Basel has recorded — each shown against what a normal day that time of year looks like.
That is about 23°F hotter than a normal July afternoon in Basel (typical high near 78°F).
The three most extreme on record
About 41°F colder than a normal January night in Basel (typical low near 31°F).
The three most extreme on record
About 96% of a typical July's rain in a single day (Basel averages roughly 3.5 in across the month).
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.
Basel's record heat sits well above even a hot day for the season — July's 101°F is about 23°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 — the official 1991–2020 climate normals from a national meteorological service, measured at Basel / Binningen, about 2 km from the city centre.