Frost dates for 59928Polebridge, MT
Frost is possible in any month near Polebridge, based on NOAA 1991-2020 records for the Polebridge, MT station.
Frost is possible in any month. Even summer nights can drop to freezing at this station, so protect tender plants whenever cold nights are forecast.
Frost risk by date
NOAA reports frost dates as probabilities. The middle date is the average (a 50% chance). For spring, the 10% date is a safer planting date: frost after it happens in about 1 year in 10. Light frost (36°F) can damage tender plants; a hard freeze (28°F) kills most annuals.
| Temperature | Last spring: 90% / 50% / 10% chance | First fall: 10% / 50% / 90% chance | Growing season (50%) | Years with at least one |
|---|---|---|---|---|
| Light frost (36°F) | — | — | 17 days | 100% |
| Frost / freeze (32°F) | — | — | 40 days | 100% |
| Hard freeze (28°F) | — | — | 82 days | 100% |
Where these dates come from
ZIP code 59928 is matched to the NOAA station Polebridge, MT, 9.6 km away, at 3,520 ft elevation (492 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Polebridge, MT (used) | 3,520 ft | — | — |
| Olney, MT | 3,165 ft | — | — |
| Fortine 1 N, MT | 3,000 ft | May 16 | Sep 18 |
| Whitefish, MT | 3,100 ft | May 16 | Sep 25 |
Frost dates near Polebridge
- Stryker, MT 59933 · last —, first —
- Olney, MT 59927 · last —, first —
- Fortine, MT 59918 · last May 16, first Sep 18
- Trego, MT 59934 · last May 16, first Sep 18
- Eureka, MT 59917 · last May 11, first Sep 27
- Whitefish, MT 59937 · last May 16, first Sep 25
- West Glacier, MT 59936 · last May 18, first Sep 20
- Coram, MT 59913 · last May 18, first Sep 20
Frequently asked questions
- When is the last frost in Polebridge, MT?
- Frost is possible in any month at the nearest NOAA station (Polebridge, MT), so there is no reliable average last frost date.
- When is the first frost in Polebridge, MT?
- Frost is possible in any month at the nearest NOAA station.
- Are these frost dates a forecast?
- No. They are 30-year averages and probabilities from NOAA weather station records. Use them to plan, then watch your local forecast before planting tender crops or leaving them uncovered.