Cheyenne climate — normals and trends
Cheyenne (United States) has a warm-summer humid continental climate (Dfb) under the Köppen-Geiger classification. Its mean annual temperature is 8.2 °C and it receives 477 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 (21.1 °C on average) and the coldest is January (-2.4 °C). Rainfall peaks in May.
Cheyenne averages 148 frost days, 23 hot days (≥ 30 °C) and 93 rainy days per year.
Cheyenne has warmed by +1.9 °C between 1940 and 2025, or +0.22 °C per decade. This trend is statistically significant.
The number of frost days there went from about 157 to 139 per year over the period.
The hottest day of the period reached 37.3 °C (on 11 July 1954) and the coldest -37.4 °C (on 22 December 1990).
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
CheyenneWyoming
- coords
- 41.14°, -104.82°
- period
- 1940–2025 · 86 yrs
Mean daily temperature
8.2°C
Average daily high
14.4°C
Average daily low
2.3°C
Annual rainfall
477mm
Sunshine / day
10.4h
Mean relative humidity
53%
Average peak wind
26.3km/h
Seasonal range
23.5°C
Frost days (< 0 °C)
148 d/yr
Hot days (≥ 30 °C)
23 d/yr
Rainy days (≥ 1 mm)
93 d/yr
Annual snowfall
116.8 cm
Average feels-like high
10.1 °C
Average feels-like low
-2.4 °C
Average peak gust
45.9 km/h
Tropical nights (≥ 20 °C)
0 d/yr
Solar radiation
17.8 MJ/m²
Has the climate changed?
One stripe per year, 1940 to 2025
+1.9 °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
37.3 °C
11 July 1954
Coldest day
-37.4 °C
22 December 1990
Wettest day
88 mm
19 July 1973
Windiest day
70.0 km/h
16 March 1963
Strongest gust
118.1 km/h
7 April 1962
Hottest feels-like
35.9 °C
23 June 1954
Coldest feels-like
-42.8 °C
22 December 1990
Snowiest day
39.7 cm
14 March 2021
Sunniest day
14.4 h
15 June 2022
Normals computed over complete calendar years 1940–2025.
A specific year
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Across the whole year
Month by month
| High | vs. normal | Precipitation | vs. normal | |
|---|---|---|---|---|
| Jan | 1.3 °C | -1.5 °C | 16 mm | -1 mm |
| Feb | 4.2 °C | +0.2 °C | 14 mm | -6 mm |
| Mar | 12.2 °C | +4.8 °C | 46 mm | +6 mm |
| Apr | 14.0 °C | +1.9 °C | 30 mm | -32 mm |
| May | 18.7 °C | +1.1 °C | 66 mm | -16 mm |
| Jun | 25.4 °C | +1.4 °C | 52 mm | -8 mm |
| Jul | 29.1 °C | +1.1 °C | 44 mm | -2 mm |
| Aug | 27.5 °C | +0.4 °C | 45 mm | +7 mm |
| Sep | 23.4 °C | +1.0 °C | 67 mm | +29 mm |
| Oct | 16.9 °C | +1.4 °C | 16 mm | -19 mm |
| Nov | 12.6 °C | +4.7 °C | 8 mm | -15 mm |
| Dec | 10.7 °C | +6.9 °C | 6 mm | -12 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 Cheyenne?
Cheyenne has a warm-summer humid continental climate (Köppen Dfb). Over 1940-2025, the average annual temperature is 8.2 °C and it receives 477 mm of precipitation per year.
What is the hottest day ever recorded in Cheyenne?
The hottest day measured in Cheyenne between 1940 and 2025 was 11 July 1954, reaching 37.3 °C.
What is the coldest day in Cheyenne?
The coldest day measured in Cheyenne between 1940 and 2025 was 22 December 1990, at -37.4 °C.
Does it snow in Cheyenne?
Yes. Cheyenne gets on average 116.8 cm of snow per year and has around 148 frost days.
Has the climate of Cheyenne warmed?
Yes: Cheyenne warmed by +1.9 °C between 1940 and 2025, a statistically significant trend.
What is the wettest day in Cheyenne?
The wettest day measured in Cheyenne between 1940 and 2025 was 19 July 1973, with 88 mm of rain in 24 hours.
What was the windiest day in Cheyenne?
The windiest day measured in Cheyenne between 1940 and 2025 was 16 March 1963, with winds reaching 70.0 km/h.
What is the warmest month in Cheyenne?
The warmest month in Cheyenne is July (21.1 °C on average); the coldest is January (-2.4 °C).
How much does it rain in Cheyenne?
Cheyenne receives on average 477 mm of precipitation per year, spread over about 93 rainy days.
Is it sunny in Cheyenne?
Cheyenne gets on average 10.4 hours of sunshine per day, roughly 3,796 hours per year over 1940-2025.
What is the biggest single-day snowfall in Cheyenne?
The heaviest 24-hour snowfall measured in Cheyenne between 1940 and 2025 was 14 March 2021, with 39.7 cm.
Are there tropical nights in Cheyenne?
Almost never: tropical nights (temperature staying above 20 °C) are virtually non-existent in Cheyenne.
What was the most extreme apparent temperature in Cheyenne?
In Cheyenne, between 1940 and 2025, the highest apparent temperature reached 35.9 °C on 23 June 1954, and the lowest was -42.8 °C on 22 December 1990.
Compare Cheyenne with another city
Pick a second city: its normals will be set against these, indicator by indicator.
Nearby cities
The climate around Cheyenne