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Weather extremes

How extreme does Bozeman's weather get?

The hottest, coldest, wettest and snowiest days Bozeman 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 Bozeman Montana State Univ station 2 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 Bozeman has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
100°F Jul 12, 2002

That is about 18°F hotter than a normal July afternoon in Bozeman (typical high near 82°F).

The three most extreme on record

1 100°F Jul 12, 2002
2 100°F Jul 13, 2002
3 100°F Jul 14, 2002
❄️ Coldest night
-40°F Jan 13, 2024

About 55°F colder than a normal January night in Bozeman (typical low near 15°F).

The three most extreme on record

1 -40°F Jan 13, 2024recent
2 -39°F Dec 22, 2022
3 -32°F Dec 24, 1983
🌧️ Most rain in one day
2.68 in May 7, 1988

About 91% of a typical May's rain in a single day (Bozeman averages roughly 2.9 in across the month).

The three most extreme on record

1 2.68 in May 7, 1988
2 2.29 in Jun 13, 2001
3 2.21 in Jun 16, 1992
Most snow in one day
24.0 in Nov 12, 2009

Close to a whole typical November's snow in one day (Bozeman averages about 13 in across the month).

The three most extreme on record

1 24.0 in Nov 12, 2009
2 16.0 in Mar 11, 1991
3 15.0 in Mar 30, 1980

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 100°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Bozeman's record heat sits well above even a hot day for the season — July's 100°F is about 18°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, Bozeman's warmest days reach the low 80s°F and its coldest nights drop to the mid-10s°F. But across the record it has gone as high as 100°F and as low as −40°F. A single day has delivered over 3 inches of rain or close to 24 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 Bozeman Montana State Univ (NOAA GHCN station USC00241044), about 2 km from the city centre.

How we build these numbers →