Last frost date in Kalispell, Montana
May 31
Average last frost in spring. In an early year (1 in 10) it's over by May 13; in a late year (1 in 10) it comes after June 22.
September 10
Average first frost in fall. 1 year in 10 it comes by August 26.
Source: NOAA U.S. Climate Normals 1991–2020, station Kalispell Glacier AP (USC00244558), 6.8 miles from Kalispell, elevation 2,957 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 13 | May 31 | June 22 |
| First frost in fall | Aug 26 | Sept 10 | Sept 25 |
Frost-free days in an average year: 100
| Chance in a year | Average last in spring | Average first in fall | |
|---|---|---|---|
| Light frost (36°F) | Every year | — | — |
| Frost (32°F) | Every year | May 31 | Sept 10 |
| Hard freeze (28°F) | Every year | May 10 | Sept 27 |
Nights at 32°F or colder in an average year: 187
What to plant now in Kalispell
Nothing in USDA's planting table is in its window in Kalispell right now, or opens in the next 45 days.
- Spring planting calendar for an average last frost around May 30 Kalispell: May 31
- Fall planting calendar for an average first frost around September 10 Kalispell: September 10
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 Montana
- Missoula 94 mi · last frost May 10
- Great Falls 149 mi · last frost May 6
- Helena 155 mi · last frost May 9
- Butte-Silver Bow (balance) 178 mi · last frost June 13
- Belgrade 225 mi · last frost May 26