Cheyenne, WY Frost Dates
The last spring frost in Cheyenne usually comes around May 12 and the first fall frost around October 1.
| Spring (last) | Fall (first) | |
|---|---|---|
| Frost, 32°F | May 12 | October 1 |
| Hard freeze, 28°F | May 2 | October 11 |
Growing season: about 141 days.
Frequently asked questions
When is the last frost in Cheyenne, WY?
The median date of the last spring frost (32°F) is May 12. In half of years the last frost comes earlier and in half it comes later, so waiting a week or two past May 12 lowers the risk for tender plants.
When is the first frost in Cheyenne?
The median date of the first fall frost (32°F) is October 1, and a hard freeze (28°F) usually follows around October 11.
How long is the growing season in Cheyenne?
About 141 days between the median last spring frost and first fall frost.
NOAA NCEI U.S. Climate Normals 1991-2020, station USW00024018. Median (50% probability) dates. Low spots and valleys can frost later in spring and earlier in fall than the station.