Last frost date in Denver, Colorado
May 4
Average last frost in spring. In an early year (1 in 10) it's over by April 20; in a late year (1 in 10) it comes after May 16.
October 8
Average first frost in fall. 1 year in 10 it comes by September 25.
Source: NOAA U.S. Climate Normals 1991–2020, station Denver-stapleton (USW00023062), 0.6 miles from Denver, elevation 5,286 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 20 | May 4 | May 16 |
| First frost in fall | Sept 25 | Oct 8 | Oct 20 |
Frost-free days in an average year: 156
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 12 | Oct 1 |
| Frost (32°F) | Every year | May 4 | Oct 8 |
| Hard freeze (28°F) | Every year | Apr 22 | Oct 18 |
Nights at 32°F or colder in an average year: 156
What to plant now in Denver
- Spring planting calendar for an average last frost around April 30 Denver: May 4
- Fall planting calendar for an average first frost around October 10 Denver: October 8
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 Colorado
- Aurora 9 mi · last frost May 7
- Commerce City 10 mi · last frost May 3
- Thornton 11 mi · last frost May 2
- Centennial 12 mi · last frost May 5
- Lakewood 13 mi · last frost May 3
Updated