Bozeman climate — normals and trends
Bozeman (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 3.8 °C and it receives 699 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 (17.4 °C on average) and the coldest is January (-7.9 °C). Rainfall peaks in May.
Bozeman averages 202 frost days, 6 hot days (≥ 30 °C) and 133 rainy days per year.
Bozeman has warmed by +1.8 °C between 1940 and 2025, or +0.21 °C per decade. This trend is statistically significant.
The number of frost days there went from about 212 to 192 per year over the period.
The hottest day of the period reached 35.9 °C (on 19 July 2007) and the coldest -43.4 °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
BozemanMontana
- coords
- 45.68°, -111.04°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
3.8°C
Average daily high
10.1°C
Average daily low
-2.3°C
Annual rainfall
699mm
Sunshine / day
10.3h
Mean relative humidity
67%
Average peak wind
11.9km/h
Seasonal range
25.3°C
Frost days (< 0 °C)
202 d/yr
Hot days (≥ 30 °C)
6 d/yr
Rainy days (≥ 1 mm)
133 d/yr
Annual snowfall
191.3 cm
Average feels-like high
7.4 °C
Average feels-like low
-5.7 °C
Average peak gust
35.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
16.7 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.8 °C
since 1940
+0.2 °C per decade · r² = 0.34 · 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
35.9 °C
19 July 2007
Coldest day
-43.4 °C
13 January 2024
Wettest day
50 mm
28 May 1946
Windiest day
35.3 km/h
11 January 1972
Strongest gust
108.4 km/h
22 February 2012
Hottest feels-like
34.8 °C
12 July 2002
Coldest feels-like
-48.4 °C
13 January 2024
Snowiest day
24.3 cm
13 June 2001
Sunniest day
15.0 h
1 June 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 | -5.1 °C | -2.1 °C | 42 mm | +8 mm |
| Feb | -4.1 °C | -3.4 °C | 49 mm | +15 mm |
| Mar | 5.3 °C | +2.2 °C | 51 mm | -1 mm |
| Apr | 8.6 °C | +0.4 °C | 93 mm | +16 mm |
| May | 16.2 °C | +1.8 °C | 85 mm | -25 mm |
| Jun | 21.0 °C | +1.5 °C | 43 mm | -63 mm |
| Jul | 25.6 °C | +0.3 °C | 52 mm | +5 mm |
| Aug | 25.1 °C | +0.3 °C | 42 mm | -4 mm |
| Sep | 21.7 °C | +3.1 °C | 32 mm | -28 mm |
| Oct | 10.9 °C | -0.3 °C | 84 mm | +28 mm |
| Nov | 6.9 °C | +4.4 °C | 28 mm | -15 mm |
| Dec | 2.7 °C | +5.0 °C | 68 mm | +33 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 Bozeman?
Bozeman has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 3.8 °C and it receives 699 mm of precipitation per year.
What is the hottest day ever recorded in Bozeman?
The hottest day measured in Bozeman between 1940 and 2025 was 19 July 2007, reaching 35.9 °C.
What is the coldest day in Bozeman?
The coldest day measured in Bozeman between 1940 and 2025 was 13 January 2024, at -43.4 °C.
Does it snow in Bozeman?
Yes. Bozeman gets on average 191.3 cm of snow per year and has around 202 frost days.
Has the climate of Bozeman warmed?
Yes: Bozeman warmed by +1.8 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Bozeman?
The wettest day measured in Bozeman between 1940 and 2025 was 28 May 1946, with 50 mm of rain in 24 hours.
What was the windiest day in Bozeman?
The windiest day measured in Bozeman between 1940 and 2025 was 11 January 1972, with winds reaching 35.3 km/h.
What is the warmest month in Bozeman?
The warmest month in Bozeman is July (17.4 °C on average); the coldest is January (-7.9 °C).
How much does it rain in Bozeman?
Bozeman receives on average 699 mm of precipitation per year, spread over about 133 rainy days.
Is it sunny in Bozeman?
Bozeman gets on average 10.3 hours of sunshine per day, roughly 3,760 hours per year over 1940-2025.
What is the biggest single-day snowfall in Bozeman?
The heaviest 24-hour snowfall measured in Bozeman between 1940 and 2025 was 13 June 2001, with 24.3 cm.
Are there tropical nights in Bozeman?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Bozeman.
What was the most extreme apparent temperature in Bozeman?
In Bozeman, between 1940 and 2025, the highest apparent temperature reached 34.8 °C on 12 July 2002, and the lowest was -48.4 °C on 13 January 2024.
Compare Bozeman with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Bozeman