Butte climate — normals and trends
Butte (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 2.8 °C and it receives 512 mm of precipitation per year.
These figures are normals computed over 86 complete calendar years, from 1940 to 2025, using ERA5 reanalysis data from the Copernicus programme.
The warmest month is July (16.3 °C on average) and the coldest is January (-9.0 °C). Rainfall peaks in June.
Butte averages 220 frost days, 3 hot days (≥ 30 °C) and 116 rainy days per year.
Butte has warmed by +2.0 °C between 1940 and 2025, or +0.24 °C per decade. This trend is statistically significant.
The number of frost days there went from about 231 to 209 per year over the period.
The hottest day of the period reached 34.7 °C (on 22 July 2006) and the coldest -48.1 °C (on 13 January 2024).
Data from ERA5 reanalysis (Copernicus Climate Change Service), redistributed under a CC-BY 4.0 licence. Normals are recomputed whenever the archive is updated.
Climate normals · ERA5
ButteMontana
- coords
- 46.00°, -112.53°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
2.8°C
Average daily high
9.2°C
Average daily low
-3.5°C
Annual rainfall
512mm
Sunshine / day
10.1h
Mean relative humidity
65%
Average peak wind
13.3km/h
Seasonal range
25.3°C
Frost days (< 0 °C)
220 d/yr
Hot days (≥ 30 °C)
3 d/yr
Rainy days (≥ 1 mm)
116 d/yr
Annual snowfall
169.5 cm
Average feels-like high
5.9 °C
Average feels-like low
-7.2 °C
Average peak gust
37.6 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.3 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+2.0 °C
since 1940
+0.2 °C per decade · r² = 0.38 · p = < 0.001
Trend fitted by linear regression (ordinary least squares) on annual means. A trend is shown only when it is statistically significant (p < 0.05).
A climograph overlays rainfall (bars) and temperature (line): the standard reading in climatology, where you can see at a glance whether the warm season is also the dry one.
Records for the period
Hottest day
34.7 °C
22 July 2006
Coldest day
-48.1 °C
13 January 2024
Wettest day
45 mm
13 June 2017
Windiest day
35.3 km/h
16 October 1988
Strongest gust
100.8 km/h
2 February 1999
Hottest feels-like
34.1 °C
12 July 2002
Coldest feels-like
-52.9 °C
13 January 2024
Snowiest day
25.1 cm
11 May 1981
Sunniest day
15.0 h
21 May 1940
Normals computed over complete calendar years 1940–2025.
A specific year
Pick a year and see how it compares to normal — warmer, drier or more extreme than usual?
Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | -4.5 °C | -0.9 °C | 25 mm | -2 mm |
| Feb | -3.2 °C | -1.9 °C | 51 mm | +25 mm |
| Mar | 4.7 °C | +2.4 °C | 34 mm | -5 mm |
| Apr | 8.5 °C | +1.4 °C | 43 mm | -10 mm |
| May | 15.4 °C | +2.4 °C | 78 mm | -3 mm |
| Jun | 19.8 °C | +1.5 °C | 49 mm | -33 mm |
| Jul | 25.0 °C | +0.7 °C | 38 mm | 0 mm |
| Aug | 23.8 °C | +0.1 °C | 41 mm | +7 mm |
| Sep | 21.3 °C | +3.7 °C | 17 mm | -23 mm |
| Oct | 9.9 °C | -0.3 °C | 29 mm | -4 mm |
| Nov | 6.1 °C | +4.4 °C | 20 mm | -11 mm |
| Dec | 2.0 °C | +5.0 °C | 60 mm | +32 mm |
The year's extremes
What was the weather like that day?
Your birthday, a wedding, a memorable trip: discover the actual weather for any date since 1940.
Frequently asked questions
What is the climate of Butte?
Butte has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 2.8 °C and it receives 512 mm of precipitation per year.
What is the hottest day ever recorded in Butte?
The hottest day measured in Butte between 1940 and 2025 was 22 July 2006, reaching 34.7 °C.
What is the coldest day in Butte?
The coldest day measured in Butte between 1940 and 2025 was 13 January 2024, at -48.1 °C.
Does it snow in Butte?
Yes. Butte gets on average 169.5 cm of snow per year and has around 220 frost days.
Has the climate of Butte warmed?
Yes: Butte warmed by +2.0 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Butte?
The wettest day measured in Butte between 1940 and 2025 was 13 June 2017, with 45 mm of rain in 24 hours.
What was the windiest day in Butte?
The windiest day measured in Butte between 1940 and 2025 was 16 October 1988, with winds reaching 35.3 km/h.
What is the warmest month in Butte?
The warmest month in Butte is July (16.3 °C on average); the coldest is January (-9.0 °C).
How much does it rain in Butte?
Butte receives on average 512 mm of precipitation per year, spread over about 116 rainy days.
Is it sunny in Butte?
Butte gets on average 10.1 hours of sunshine per day, roughly 3,687 hours per year over 1940-2025.
What is the biggest single-day snowfall in Butte?
The heaviest 24-hour snowfall measured in Butte between 1940 and 2025 was 11 May 1981, with 25.1 cm.
Are there tropical nights in Butte?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Butte.
What was the most extreme apparent temperature in Butte?
In Butte, between 1940 and 2025, the highest apparent temperature reached 34.1 °C on 12 July 2002, and the lowest was -52.9 °C on 13 January 2024.
Compare Butte with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Butte