Last frost date in Commerce City, Colorado
May 3
Average last frost in spring. In an early year (1 in 10) it's over by April 22; in a late year (1 in 10) it comes after May 16.
October 7
Average first frost in fall. 1 year in 10 it comes by September 26.
Source: NOAA U.S. Climate Normals 1991–2020, station Brighton 3 SE (USC00050950), 4.7 miles from Commerce City, elevation 5,016 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Brighton, so its frost dates are the same as Commerce City's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 22 | May 3 | May 16 |
| First frost in fall | Sept 26 | Oct 7 | Oct 19 |
Frost-free days in an average year: 155
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 13 | Sept 30 |
| Frost (32°F) | Every year | May 3 | Oct 7 |
| Hard freeze (28°F) | Every year | Apr 23 | Oct 16 |
Nights at 32°F or colder in an average year: 163
What to plant now in Commerce City
- Spring planting calendar for an average last frost around April 30 Commerce City: May 3
- Fall planting calendar for an average first frost around October 10 Commerce City: October 7
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
- Thornton 8 mi · last frost May 2
- Denver 10 mi · last frost May 4
- Aurora 13 mi · last frost May 7
- Arvada 19 mi · last frost May 5
- Centennial 20 mi · last frost May 5
Updated