Cheyenne, WY climate
Cheyenne has chilly, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 85°, a January night drops to 16°, and about 65 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cheyenne feels like
Winter
Spring
Summer
Fall
Cheyenne weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | 30-yr range |
|---|---|---|---|---|---|---|
| January | 41° | 16° | 0.4" | 5.0" | 5 | 21° – 35° |
| February | 42° | 16° | 0.5" | 9.9" | 7 | 23° – 36° |
| March | 50° | 23° | 1.0" | 9.3" | 6 | 29° – 44° |
| April | 56° | 29° | 1.7" | 11.6" | 10 | 36° – 48° |
| May | 66° | 38° | 2.5" | 6.0" | 13 | 45° – 56° |
| June | 78° | 47° | 2.2" | 0 | 9 | 56° – 67° |
| July | 85° | 53° | 2.0" | 0 | 11 | 64° – 74° |
| August | 83° | 51° | 1.5" | 0 | 10 | 63° – 71° |
| September | 75° | 43° | 1.5" | 0.1" | 7 | 54° – 64° |
| October | 61° | 31° | 1.1" | 5.9" | 7 | 37° – 52° |
| November | 48° | 22° | 0.6" | 7.2" | 5 | 25° – 43° |
| December | 41° | 16° | 0.5" | 9.7" | 6 | 20° – 33° |
| Year | 60° | 32° | 15.3" | 64.7" | 96 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Cheyenne
Cheyenne gets 15 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 96 days a year.
About 141 frost-free days a year
In half of years the last 32° night comes by May 12 and the first one by October 1. That leaves about 141 frost-free days for gardens, shorter than 88% of U.S. towns.
Heating and cooling a home in Cheyenne
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cheyenne, 95% of that work is heating and 5% is cooling, so the furnace matters far more than the air conditioner.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Cheyenne and its neighbors
Cheyenne borders 4 towns with climate data. January nights across them vary by 0.4°. Fox Farm-College has both the coldest January nights (16°) and the hottest July afternoons (86°). Cheyenne’s January low is 16° and its July high 85°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Cheyenne compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Cheyenne averaged 2.1° warmer than the 1900s. The biggest change is in March (+4.5°). The shift is larger than in 96% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cheyenne’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 25° to 43°. August is the most reliable, staying within 8°.
Common questions about Cheyenne’s climate
What is the coldest month in Cheyenne?
December, with a typical high of 41° and a low of 16°.
What is the hottest month in Cheyenne?
July, with a typical high of 85° and a low of 53°. About 15 days a year reach 90°.
How much snow does Cheyenne get?
About 65 inches in a normal winter, most of it in April.
When is the first frost in Cheyenne?
In half of years the first 32° night comes by October 1, and the last spring frost by May 12.
What is the rainiest month in Cheyenne?
May, with 2.5 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cheyenne itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cheyenne 2.0 E, WY (3 mi, snow) and Cheyenne, WY (2 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.