Last frost date in Cheyenne, Wyoming
May 14
Average last frost in spring. In an early year (1 in 10) it's over by May 3; in a late year (1 in 10) it comes after May 28.
October 1
Average first frost in fall. 1 year in 10 it comes by September 17.
Source: NOAA U.S. Climate Normals 1991–2020, station Cheyenne WFO (USC00481676), 1.8 miles from Cheyenne, elevation 6,119 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | May 3 | May 14 | May 28 |
| First frost in fall | Sept 17 | Oct 1 | Oct 14 |
Frost-free days in an average year: 139
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 26 | Sept 24 |
| Frost (32°F) | Every year | May 14 | Oct 1 |
| Hard freeze (28°F) | Every year | May 3 | Oct 10 |
Nights at 32°F or colder in an average year: 169
What to plant now in Cheyenne
- Spring planting calendar for an average last frost around May 10 Cheyenne: May 14
- Fall planting calendar for an average first frost around September 30 Cheyenne: October 1
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.
Nearby in Wyoming
- Laramie 44 mi · last frost June 7
- Casper 142 mi · last frost May 10
- Gillette 220 mi · last frost May 15
- Riverton 226 mi · last frost May 12
- Rock Springs 232 mi · last frost May 24
Updated