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Weather extremes

How extreme does Oshkosh's weather get?

The hottest, coldest, wettest and snowiest days Oshkosh 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 Oshkosh station 1 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 Oshkosh has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
101°F Jul 14, 1995

That is about 19°F hotter than a normal July afternoon in Oshkosh (typical high near 82°F).

The three most extreme on record

1 101°F Jul 14, 1995
2 100°F Jul 10, 1976
3 100°F Aug 17, 1988
❄️ Coldest night
-30°F Feb 4, 1996

About 43°F colder than a normal February night in Oshkosh (typical low near 13°F).

The three most extreme on record

1 -30°F Feb 4, 1996
2 -29°F Jan 20, 1985
3 -29°F Jan 21, 1985
🌧️ Most rain in one day
5.16 in Jun 13, 2008

More rain in a single day than Oshkosh usually gets in the whole month of June (typical June total about 4.8 in).

The three most extreme on record

1 5.16 in Jun 13, 2008
2 5.00 in Oct 23, 2020
3 4.58 in Sep 11, 1986
Most snow in one day
12.0 in Dec 4, 1990

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

The three most extreme on record

1 12.0 in Dec 4, 1990
2 12.0 in Mar 16, 2026
3 10.6 in Feb 10, 2020

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

Oshkosh's record heat sits well above even a hot day for the season — July's 101°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, Oshkosh'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 101°F and as low as −30°F. A single day has delivered over 5 inches of rain or close to 12 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 Appleton (NOAA GHCN station USC00470265), about 29 km from the city centre.

How we build these numbers →