Last frost date in Flagstaff, Arizona
June 4
Average last frost in spring. In an early year (1 in 10) it's over by May 21; in a late year (1 in 10) it comes after June 19.
September 28
Average first frost in fall. 1 year in 10 it comes by September 16.
Source: NOAA U.S. Climate Normals 1991–2020, station Flagstaff Pulliam AP (USW00003103), 3.8 miles from Flagstaff, elevation 7,003 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 21 | June 4 | June 19 |
| First frost in fall | Sept 16 | Sept 28 | Oct 9 |
Frost-free days in an average year: 115
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | June 16 | Sept 19 |
| Frost (32°F) | Every year | June 4 | Sept 28 |
| Hard freeze (28°F) | Every year | May 20 | Oct 9 |
Nights at 32°F or colder in an average year: 202
What to plant now in Flagstaff
- Spring planting calendar for an average last frost around May 30 Flagstaff: June 4
- Fall planting calendar for an average first frost around September 30 Flagstaff: September 28
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 Arizona
- Cottonwood 36 mi · last frost Mar 30
- Camp Verde 45 mi · last frost Apr 16
- Chino Valley 54 mi · last frost Apr 27
- Prescott Valley 57 mi · last frost Apr 30
- Payson 67 mi · last frost Apr 29
Updated