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Weather extremes

How extreme does Siegen's weather get?

The hottest, coldest, wettest and snowiest days Siegen has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 50+ years of daily weather observations (1971–present), from the Bad Marienberg station 24 km away. Updated through February 2026 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Siegen has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
95°F Jul 25, 2019

That is about 25°F hotter than a normal July afternoon in Siegen (typical high near 70°F).

The three most extreme on record

1 95°F Jul 25, 2019
2 93°F Aug 8, 2003
3 93°F Aug 12, 2003
❄️ Coldest night
-7°F Jan 1, 1979

About 35°F colder than a normal January night in Siegen (typical low near 28°F).

The three most extreme on record

1 -7°F Jan 1, 1979
2 -3°F Feb 9, 1986
3 -2°F Jan 11, 1987
🌧️ Most rain in one day
3.06 in Nov 22, 1984

About 82% of a typical November's rain in a single day (Siegen averages roughly 3.7 in across the month).

The three most extreme on record

1 3.06 in Nov 22, 1984
2 2.56 in Sep 14, 1998
3 2.55 in Feb 6, 1984

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.

-30°-10°10°30°50°70°90°110° all-time high 95°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Siegen's record heat sits well above even a hot day for the season — July's 95°F is about 25°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

In a normal year, Siegen's warmest days reach the low 70s°F and its coldest nights drop to the high 20s°F. But across the record it has gone as high as 95°F and as low as −7°F. A single day has delivered over 3 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at Bad Marienberg, a weather station, about 24 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →