Last frost date in Arvada, Colorado
May 5
Average last frost in spring. In an early year (1 in 10) it's over by April 24; in a late year (1 in 10) it comes after May 18.
October 5
Average first frost in fall. 1 year in 10 it comes by September 20.
Source: NOAA U.S. Climate Normals 1991–2020, station Wheat Ridge 2 (USC00058995), 4.4 miles from Arvada, elevation 5,398 ft. NOAA National Centers for Environmental Information. These are long-term averages, not a forecast.
This station is also the nearest one for Wheat Ridge, so its frost dates are the same as Arvada's.
| Early year | Average | Late year | |
|---|---|---|---|
| Last frost in spring | Apr 24 | May 5 | May 18 |
| First frost in fall | Sept 20 | Oct 5 | Oct 18 |
Frost-free days in an average year: 151
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | May 16 | Sept 26 |
| Frost (32°F) | Every year | May 5 | Oct 5 |
| Hard freeze (28°F) | Every year | Apr 25 | Oct 14 |
Nights at 32°F or colder in an average year: 168
What to plant now in Arvada
- Spring planting calendar for an average last frost around April 30 Arvada: May 5
- Fall planting calendar for an average first frost around September 30 Arvada: October 5
Planting dates: USDA Home and Garden Bulletin No. 9 (1967), “Suburban and Farm Vegetable Gardens,” tables 4 and 5. How we match the table.