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Weather extremes

How extreme does Mannheim's weather get?

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

Based on 19 years of daily weather observations (2007–present), from the Waibstadt station 38 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 Mannheim has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
102°F Aug 7, 2015

That is about 24°F hotter than a normal August afternoon in Mannheim (typical high near 78°F).

The three most extreme on record

1 102°F Aug 7, 2015
2 100°F Jul 5, 2015
3 100°F Jul 25, 2019
❄️ Coldest night
4°F Dec 20, 2009

About 29°F colder than a normal December night in Mannheim (typical low near 33°F).

The three most extreme on record

1 4°F Dec 20, 2009
2 4°F Dec 26, 2010
3 5°F Dec 19, 2009
🌧️ Most rain in one day
2.17 in May 29, 2016

About 77% of a typical May's rain in a single day (Mannheim averages roughly 2.8 in across the month).

The three most extreme on record

1 2.17 in May 29, 2016
2 2.08 in Sep 13, 2017
3 1.80 in Oct 20, 2016

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.

-10°10°30°50°70°90°110°130° all-time high 102°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Mannheim's record heat sits well above even a hot day for the season — August's 102°F is about 24°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, Mannheim's warmest days reach the high 70s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 102°F and as low as 4°F. A single day has delivered over 2 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 Weinbiet, a weather station, about 28 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →