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Weather extremes

How extreme does Wisconsin Dells's weather get?

The hottest, coldest, wettest and snowiest days Wisconsin Dells 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 Wisconsin Dells Wwtp station 2 km away. Updated through May 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 Wisconsin Dells has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
102°F Jul 5, 2012

That is about 20°F hotter than a normal July afternoon in Wisconsin Dells (typical high near 82°F).

The three most extreme on record

1 102°F Jul 5, 2012
2 102°F Jul 6, 2012
3 102°F Jul 7, 2012
❄️ Coldest night
-37°F Feb 3, 1996

About 47°F colder than a normal February night in Wisconsin Dells (typical low near 10°F).

The three most extreme on record

1 -37°F Feb 3, 1996
2 -37°F Jan 31, 2019
3 -36°F Jan 19, 1994
🌧️ Most rain in one day
7.67 in Aug 7, 1980

More rain in a single day than Wisconsin Dells usually gets in the whole month of August (typical August total about 4.2 in).

The three most extreme on record

1 7.67 in Aug 7, 1980
2 5.27 in Aug 31, 1981
3 5.25 in Jul 15, 2010
Most snow in one day
15.0 in Dec 1, 1985

Close to a whole typical December's snow in one day (Wisconsin Dells averages about 10 in across the month).

The three most extreme on record

1 15.0 in Dec 1, 1985
2 15.0 in Jan 3, 1999
3 14.0 in Mar 18, 1971

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.

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

Wisconsin Dells's record heat sits well above even a hot day for the season — July's 102°F is about 20°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, Wisconsin Dells's warmest days reach the low 80s°F and its coldest nights drop to the high 0s°F. But across the record it has gone as high as 102°F and as low as −37°F. A single day has delivered over 8 inches of rain or close to 15 inches of snow. 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 Baraboo Wwtp, a weather station, about 19 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →