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Weather extremes

How extreme does Cheyenne's weather get?

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

🔥 Hottest day
99°F Jun 28, 2018

That is about 22°F hotter than a normal June afternoon in Cheyenne (typical high near 77°F).

The three most extreme on record

1 99°F Jun 28, 2018
2 99°F Jul 18, 2022
3 98°F Jul 6, 1973
❄️ Coldest night
-29°F Jan 18, 1984

About 47°F colder than a normal January night in Cheyenne (typical low near 18°F).

The three most extreme on record

1 -29°F Jan 18, 1984
2 -28°F Dec 21, 1983
3 -28°F Dec 22, 1989
🌧️ Most rain in one day
6.06 in Aug 1, 1985

More rain in a single day than Cheyenne usually gets in the whole month of August (typical August total about 1.5 in).

The three most extreme on record

1 6.06 in Aug 1, 1985
2 3.41 in Jul 19, 1973
3 2.69 in Sep 8, 1973
Most snow in one day
22.7 in Mar 14, 2021

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

The three most extreme on record

1 22.7 in Mar 14, 2021recent
2 19.8 in Nov 20, 1979
3 17.3 in Apr 20, 1984

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° all-time high 99°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Cheyenne's record heat sits well above even a hot day for the season — June's 99°F is about 22°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, Cheyenne's warmest days reach the mid-80s°F and its coldest nights drop to the high 10s°F. But across the record it has gone as high as 99°F and as low as −29°F. A single day has delivered over 6 inches of rain or close to 23 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 Cheyenne (NOAA GHCN station USW00024018), about 2 km from the city centre.

How we build these numbers →