Cheyenne Snowfall Totals & Accumulation Averages
This page pulls together information on when, how much and how often Cheyenne, Wyoming has snow.
There are data and descriptions here of how many days it snows and the total amount of snowfall that Cheyenne usually gets. There are also monthly and yearly counts of the days that the city normally has heavy snowstorms and deep snow accumulated on the ground. Plus there's information on when Cheyenne can expect the first and last snowfalls of the season.
All the numbers are long-term historical averages based on weather data gathered from 1981 to 2010 at the Cheyenne Regional Airport.
How Often it Snows in Cheyenne
This first table lists monthly and yearly totals for amount of snow and how many days it snows at least 0.1 inches (0.25 centimetres).
These averages don't show how much the snowfall in Cheyenne varies from year to year.
In December, for instance, one in four years totals over 10.8 inches of snow. Another 25 percent of years receive less than 3.7 inches for the month.
Similarly in January, fresh snowfall in the heaviest years amounts to over nine inches, while the lightest years get less than 2.3 inches.
New snow for February ranges from over 11.5 inches in heavy snowfall years to under 2.8 inches in light years.
March can be even snowier, ranging from 16 inches or more falling in the snowiest years to less than five inches in the driest years.
When Cheyenne Has Its First & Last Snowfalls
The first snowfall of autumn for Cheyenne usually arrives in October. Once every three or four years it starts snowing in September.
The season's last snowfall typically happens in May. Although rare, June can also get a little fresh snow.
Cheyenne is normally free of snow every year during July and August.
How Many Snowstorms Cheyenne Gets
Most days of snowfall in Cheyenne leave just a skiff, amounting to less than an inch, of fresh snow on the ground. For 18 days a year on average, the amount of new snow totals at least an inch.
Snowstorms of over five inches a day normally occur a couple times a year. But major blizzards that dump ten inches or more in one day are uncommon events that don't appear every year.
How Much Snow Normally Accumulates in Cheyenne
For about one-third of winter days, Cheyenne has at least an inch of snow on the ground.
Snow mostly accumulates during December and January. Typically on ten days a year, the snow covering Cheyenne gets to five or more inches deep.
The snowpack doesn't often get over ten inches here. But the snow can get that deep anytime from October to April.
National Climatic Data Center. NOAA's 1981-2010 Climate Normals.