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Weather extremes

How extreme does New Berlin's weather get?

The hottest, coldest, wettest and snowiest days New Berlin 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 W Allis station 7 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 New Berlin has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
101°F Jul 10, 1976

That is about 16°F hotter than a normal July afternoon in New Berlin (typical high near 85°F).

The three most extreme on record

1 101°F Jul 10, 1976
2 101°F Jul 14, 1977
3 101°F Aug 19, 1983
❄️ Coldest night
-26°F Jan 20, 1985

About 41°F colder than a normal January night in New Berlin (typical low near 15°F).

The three most extreme on record

1 -26°F Jan 20, 1985
2 -23°F Jan 17, 1982
3 -23°F Jan 19, 1985
🌧️ Most rain in one day
8.76 in Aug 10, 2025

More rain in a single day than New Berlin usually gets in the whole month of August (typical August total about 4.3 in).

The three most extreme on record

1 8.76 in Aug 10, 2025recent
2 4.55 in Jun 8, 2008
3 4.41 in Jun 19, 2009
Most snow in one day
13.6 in Feb 6, 1974

Close to a whole typical February's snow in one day (New Berlin averages about 14 in across the month).

The three most extreme on record

1 13.6 in Feb 6, 1974
2 13.5 in Jan 4, 1982
3 12.5 in Jan 13, 2024

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 101°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

New Berlin's record heat sits well above even a hot day for the season — July's 101°F is about 16°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, New Berlin's warmest days reach the mid-80s°F and its coldest nights drop to the mid-10s°F. But across the record it has gone as high as 101°F and as low as −26°F. A single day has delivered over 9 inches of rain or close to 14 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 — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at MT Mary College (NOAA GHCN station USC00475474), about 12 km from the city centre.

How we build these numbers →