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Weather extremes

How extreme does Muskego's weather get?

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

Based on 22 years of daily weather observations (2004–present), from the Hales Corners/Whitnall Park/Bo station 10 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 Muskego 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 19°F hotter than a normal July afternoon in Muskego (typical high near 83°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
-24°F Jan 31, 2019

About 36°F colder than a normal January night in Muskego (typical low near 12°F).

The three most extreme on record

1 -24°F Jan 31, 2019
2 -23°F Jan 30, 2019
3 -20°F Feb 1, 2019
🌧️ Most rain in one day
6.45 in Aug 10, 2025

More rain in a single day than Muskego usually gets in the whole month of August (typical August total about 3.8 in).

The three most extreme on record

1 6.45 in Aug 10, 2025recent
2 5.12 in Sep 12, 2022
3 5.00 in Jun 8, 2008
Most snow in one day
22.0 in Feb 2, 2011

The three most extreme on record

1 22.0 in Feb 2, 2011
2 14.8 in Mar 22, 2008
3 12.3 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 102°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Muskego's record heat sits well above even a hot day for the season — July's 102°F is about 19°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, Muskego's warmest days reach the low 80s°F and its coldest nights drop to the low 10s°F. But across the record it has gone as high as 102°F and as low as −24°F. A single day has delivered over 6 inches of rain or close to 22 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 21 km from the city centre.

How we build these numbers →