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Weather extremes

How extreme does Fitchburg's weather get?

The hottest, coldest, wettest and snowiest days Fitchburg 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 Uw Arboretum - Madison 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 Fitchburg has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
108°F Aug 2, 1988

That is about 27°F hotter than a normal August afternoon in Fitchburg (typical high near 81°F).

The three most extreme on record

1 108°F Aug 2, 1988
2 105°F Aug 18, 1988
3 104°F Jun 21, 1988
❄️ Coldest night
-38°F Feb 3, 1996

About 52°F colder than a normal February night in Fitchburg (typical low near 14°F).

The three most extreme on record

1 -38°F Feb 3, 1996
2 -33°F Jan 11, 1979
3 -32°F Jan 15, 1979
🌧️ Most rain in one day
6.01 in Aug 21, 2018

More rain in a single day than Fitchburg usually gets in the whole month of August (typical August total about 4.1 in).

The three most extreme on record

1 6.01 in Aug 21, 2018
2 6.00 in Aug 2, 2001
3 4.88 in Jun 16, 2018
Most snow in one day
13.5 in Dec 20, 2012

The three most extreme on record

1 13.5 in Dec 20, 2012
2 13.0 in Feb 7, 2008
3 12.0 in Dec 15, 1987

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 108°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Fitchburg's record heat sits well above even a hot day for the season — August's 108°F is about 27°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, Fitchburg'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 108°F and as low as −38°F. A single day has delivered over 6 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 Madison Dane CO Rgnl AP (NOAA GHCN station USW00014837), about 22 km from the city centre.

How we build these numbers →