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Weather extremes

How extreme does Luzern's weather get?

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

Based on 34 years of daily weather observations (1991–present), from the Luzern station 2 km away. Updated through August 2025 — 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 Luzern has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
96°F Aug 13, 2003

That is about 21°F hotter than a normal August afternoon in Luzern (typical high near 76°F).

The three most extreme on record

1 96°F Aug 13, 2003
2 96°F Jul 11, 2023
3 95°F Aug 11, 2003
❄️ Coldest night
3°F Dec 20, 2009

About 28°F colder than a normal December night in Luzern (typical low near 31°F).

The three most extreme on record

1 3°F Dec 20, 2009
2 6°F Mar 1, 2005
3 7°F Feb 4, 2012
🌧️ Most rain in one day
5.91 in Feb 5, 2019

More rain in a single day than Luzern usually gets in the whole month of February (typical February total about 2.4 in).

The three most extreme on record

1 5.91 in Feb 5, 2019
2 4.53 in Jun 7, 2002
3 3.82 in Sep 13, 2012

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° all-time high 96°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Luzern's record heat sits well above even a hot day for the season — August's 96°F is about 21°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, Luzern's warmest days reach the high 70s°F and its coldest nights drop to the high 20s°F. But across the record it has gone as high as 96°F and as low as 3°F. A single day has delivered over 6 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 — the official 1991–2020 climate normals from a national meteorological service, measured at Luzern, about 2 km from the city centre.

How we build these numbers →