Cheyenne, WY Climate & Monthly Averages
The climate of Cheyenne
Cheyenne spends most of the year cold. July, the warmest month, averages 83°F (28°C) by day - a figure many cities in our dataset pass in early spring - while January holds at 37°F (3°C) with 89 wet days a year across the whole calendar.
Climate quick facts
- Hottest month: July - highs near 83°F (28°C)
- Coldest month: January - highs near 37°F (3°C)
- Decade extremes (2015-2024): 96°F (36°C) high · -26°F (-32°C) low
- Wettest month: May (16 rainy days) · Sunniest: June (12.9 h sun/day)
- Climate type: semi-arid
- Annual swing: 24°C between the average warmest and coolest month · day to night: 12°C
- Snow: about 27 days a year
- Months with freezing average lows: 6
- Average humidity: 51%
Temperatures through the year
Relative humidity averages 51% across the year, drier than all but 7% of the 3496 cities in our dataset. January sits at the other end of the year: 37°F (3°C) by day, 20°F (-7°C) at night. Warmth peaks in July: highs of 83°F (28°C), lows of 59°F (15°C). Precipitation concentrates in May - 3.8 inches (97 mm) on 16 days - and thins out by January.
Rain, sun and snow
Overnight lows average at or below freezing for 6 months, November through April. The gridded 2015-2024 daily record for this location tops out at 96°F (36°C) and bottoms at -26°F (-32°C) - decade extremes, not all-time station records.
How Cheyenne compares
- Cheyenne averages 47°F (8°C) across the year - cooler than all but 5% of the 3496 cities we track.
- Afternoons run 12°C above the following night - a bigger day-to-night gap than 89% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 37° | 20° | 5 | 0.7 in | 7.9 h/day | 9.5 h | 15% | 57% |
| February | 38° | 19° | 6 | 0.8 in | 8.9 h/day | 10.6 h | 19% | 53% |
| March | 46° | 25° | 8 | 1.8 in | 9.8 h/day | 11.8 h | 25% | 55% |
| April | 54° | 31° | 10 | 2.3 in | 10.5 h/day | 13.3 h | 32% | 52% |
| May | 62° | 40° | 16 | 3.8 in | 10.9 h/day | 14.5 h | 52% | 61% |
| June | 77° | 53° | 10 | 1.7 in | 12.9 h/day | 15.1 h | 33% | 48% |
| July | 83° | 59° | 9 | 1.5 in | 12.9 h/day | 14.9 h | 28% | 46% |
| August | 81° | 58° | 8 | 1.1 in | 12.4 h/day | 13.8 h | 27% | 45% |
| September | 76° | 51° | 5 | 0.8 in | 11.0 h/day | 12.4 h | 16% | 42% |
| October | 59° | 37° | 5 | 0.9 in | 9.3 h/day | 11.0 h | 15% | 48% |
| November | 47° | 28° | 5 | 0.9 in | 8.3 h/day | 9.8 h | 17% | 50% |
| December | 38° | 22° | 4 | 0.7 in | 7.5 h/day | 9.2 h | 15% | 52% |
Cheyenne month by month
Average high and low for each month, with the bar showing where it sits in Cheyenne's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 5 days
- Sunshine
- 7.9 h
- Daylight
- 9.5 h
- Snow
- 3 days
February
- Rain
- 6 days
- Sunshine
- 8.9 h
- Daylight
- 10.6 h
- Snow
- 4 days
March
- Rain
- 8 days
- Sunshine
- 9.8 h
- Daylight
- 11.8 h
- Snow
- 5 days
April
- Rain
- 10 days
- Sunshine
- 10.5 h
- Daylight
- 13.3 h
- Snow
- 4 days
May
- Rain
- 16 days
- Sunshine
- 10.9 h
- Daylight
- 14.5 h
- Snow
- 2 days
June
- Rain
- 10 days
- Sunshine
- 12.9 h
- Daylight
- 15.1 h
July
- Rain
- 9 days
- Sunshine
- 12.9 h
- Daylight
- 14.9 h
August
- Rain
- 8 days
- Sunshine
- 12.4 h
- Daylight
- 13.8 h
September
- Rain
- 5 days
- Sunshine
- 11.0 h
- Daylight
- 12.4 h
October
- Rain
- 5 days
- Sunshine
- 9.3 h
- Daylight
- 11.0 h
- Snow
- 2 days
November
- Rain
- 5 days
- Sunshine
- 8.3 h
- Daylight
- 9.8 h
- Snow
- 3 days
December
- Rain
- 4 days
- Sunshine
- 7.5 h
- Daylight
- 9.2 h
- Snow
- 3 days
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in Cheyenne
Spring (March through May)
Spring is crisp but comfortable here - highs near 54°F (12°C), nights near 32°F (0°C), and rain falls on around 33 of the 90 days, plus about 11 snowy days. Daylight is generous - around 10.4 hours of sun a day.
Summer (June through August)
Summer is pleasantly warm here - highs near 80°F (27°C), nights near 57°F (14°C), and expect showers on roughly 27 days across the season. Daylight is generous - around 12.7 hours of sun a day.
Fall (September through November)
Fall in Cheyenne is mild, with daytime highs averaging 61°F (16°C) and nights around 39°F (4°C); rain comes on about 14 days over the three months, plus about 6 snowy days.
Winter (December through February)
Through winter, Cheyenne is frigid: 38°F (3°C) by day, 20°F (-7°C) after dark, and rain comes on about 15 days over the three months, plus about 10 snowy days. Wind sharpens cold like this considerably; pair the forecast winds with the wind speed converter to judge exposed conditions.
Climate questions, answered
Which months are driest in Cheyenne?
How does Cheyenne compare to other cities?
Is Cheyenne humid?
Is Cheyenne hot in summer?
How cold does Cheyenne get in winter?
Best time to visit Cheyenne
Aim for June to October if you get the choice: temperatures sit either side of the peak heat rather than in it, and highs average 75°F (24°C) against roughly 7 wet days a month. For the same question asked the other way round, see where else is warm in June.
Pack for Cheyenne with light clothing for the warm months, a heavy insulated coat, hat and gloves for winter and rain gear if you travel around May. July nights average 59°F (15°C), so evenings rarely match the afternoons.
Cheyenne temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.