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Weather extremes
How extreme does Herisau's weather get?
The hottest, coldest, wettest and snowiest days Herisau 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 Herisau has recorded — each shown against what a normal day that time of year looks like.
That is about 22°F hotter than a normal July afternoon in Herisau (typical high near 76°F).
The three most extreme on record
About 37°F colder than a normal March night in Herisau (typical low near 33°F).
The three most extreme on record
About 87% of a typical May's rain in a single day (Herisau averages roughly 6.1 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.
Herisau's record heat sits well above even a hot day for the season — July's 98°F is about 22°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 St. Gallen, about 10 km from the city centre.