Cheyenne, WY Weather
Cheyenne hourly forecast: next 24 hours
Today's high of 83°F (28°C) is right in line with the typical August high of 81°F (27°C).
Current conditions in detail
Cheyenne weather tomorrow (Thursday, August 27)
Tomorrow in Cheyenne looks sunny, with a high of 86° and an overnight low of 59°. Precipitation chance is modest at 17%. Winds top out near 18 mph, and the UV index reaches 8 (very high).
Cheyenne 14-day forecast
About the weather in 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.
Cheyenne weather: 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.
Season by season
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.
Average temperatures in Cheyenne by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 37° | 20° | 5 | 0.7 in | 7.9 h/day | 57% |
| February | 38° | 19° | 6 | 0.8 in | 8.9 h/day | 53% |
| March | 46° | 25° | 8 | 1.8 in | 9.8 h/day | 55% |
| April | 54° | 31° | 10 | 2.3 in | 10.5 h/day | 52% |
| May | 62° | 40° | 16 | 3.8 in | 10.9 h/day | 61% |
| June | 77° | 53° | 10 | 1.7 in | 12.9 h/day | 48% |
| July | 83° | 59° | 9 | 1.5 in | 12.9 h/day | 46% |
| August | 81° | 58° | 8 | 1.1 in | 12.4 h/day | 45% |
| September | 76° | 51° | 5 | 0.8 in | 11.0 h/day | 42% |
| October | 59° | 37° | 5 | 0.9 in | 9.3 h/day | 48% |
| November | 47° | 28° | 5 | 0.9 in | 8.3 h/day | 50% |
| December | 38° | 22° | 4 | 0.7 in | 7.5 h/day | 52% |