The hottest, coldest, wettest and snowiest days Butte has
recorded — the outer limits of what its weather can do, and how far
they sit beyond a normal day.
Based on 20 years of daily weather observations (2005–present), from the Bert Mooney Airport station 5 km away. Updated through August 2025 — 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 Butte
has recorded — each shown against what a normal day that time of year
looks like.
🔥Hottest day
97°FAug 11, 2018
The three most extreme on record
197°FAug 11, 2018
297°FAug 12, 2018
397°FJul 23, 2006
❄️Coldest night
-45°FJan 13, 2024
The three most extreme on record
1-45°FJan 13, 2024recent
2-40°FDec 22, 2022
3-36°FDec 17, 2016
🌧️Most rain in one day
1.82 inJun 7, 2023
The three most extreme on record
11.82 inJun 7, 2023recent
21.56 inJun 9, 2011
31.16 inAug 7, 2009
In plain terms
Across the record, Butte has reached as high as 97°F and as low as −45°F. A single day has delivered over 2 inches of rain. 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 Helena AP Asos (NOAA GHCN station USW00024144), about 79 km from the city centre.