Frost dates · Wyoming
When is the first frost in Cheyenne?
In a typical year, Cheyenne’s first frost comes around October 1 and its last around May 12.
One year in ten the first frost comes as early as September 18, and nine years in ten it has arrived by October 14. One year in ten the last frost is over as early as May 1, and nine years in ten it is over by May 26. Cheyenne averages about 170 nights a year at 32°F or colder, with about 141 frost-free days in between in a typical year. It’s frost season here, and the last frost usually comes around May 12. That makes it the 10th earliest first frost of the 117 cities we track where it freezes most years.
Last updated
No freeze in the forecast for the next 48 hours.
Cheyenne’s frost leaves in mid-May and is back by October, like a houseguest who never fully moved out.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
Frost dates, early, typical and late years
| Early year (1 in 10) | Typical | Late year (1 in 10) | |
|---|---|---|---|
| First frost | September 18 | October 1 | October 14 |
| Last frost | May 1 | May 12 | May 26 |
A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Cities with about the same first frost
- Anchorage, Alaska: first frost around October 1
- Duluth, Minnesota: first frost around October 1
- Rapid City, South Dakota: first frost around October 1
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00024018.