Frost dates for 59730Gallatin Gateway, MT
Frost is possible in any month near Gallatin Gateway, based on NOAA 1991-2020 records for the Big Sky 2Wnw, 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) | — | — | 26 days | 100% |
| Frost / freeze (32°F) | — | — | 50 days | 100% |
| Hard freeze (28°F) | May 26 · Jun 11 · Jun 28 | Aug 23 · Sep 8 · Sep 23 | 87 days | 100% |
Where these dates come from
ZIP code 59730 is matched to the NOAA station Big Sky 2Wnw, MT, 9.1 km away, at 6,590 ft elevation (2,957 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Big Sky 2Wnw, MT (used) | 6,590 ft | — | — |
| Norris Madison Pwr House, MT | 4,745 ft | Apr 30 | Oct 10 |
| Ennis, MT | 4,953 ft | Jun 16 | Sep 4 |
| Bozeman 6 W Exp Farm, MT | 4,775 ft | May 23 | Sep 23 |
Frost dates near Gallatin Gateway
- Big Sky, MT 59716 · last —, first —
- Ennis, MT 59729 · last Jun 16, first Sep 4
- Bozeman, MT 59772 · last May 26, first Sep 22
- Emigrant, MT 59027 · last May 21, first Sep 27
- Cameron, MT 59720 · last Jun 4, first Sep 18
- Norris, MT 59745 · last Apr 30, first Oct 10
- Pray, MT 59065 · last May 19, first Sep 25
- Mc Allister, MT 59740 · last Jun 16, first Sep 4
Frequently asked questions
- When is the last frost in Gallatin Gateway, MT?
- Frost is possible in any month at the nearest NOAA station (Big Sky 2Wnw, MT), so there is no reliable average last frost date.
- When is the first frost in Gallatin Gateway, 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.