Frost dates for 83429Island Park, ID
Frost is possible in any month near Island Park, based on NOAA 1991-2020 records for the Island Park, ID 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) | — | — | 49 days | 100% |
| Hard freeze (28°F) | May 20 · Jun 9 · Jul 2 | Aug 17 · Sep 2 · Sep 18 | 83 days | 100% |
Where these dates come from
ZIP code 83429 is matched to the NOAA station Island Park, ID, 3.1 km away, at 6,290 ft elevation (32 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| Island Park, ID (used) | 6,290 ft | — | — |
| W Yellowstone Gateway, MT | 6,679 ft | — | — |
| Lakeview, MT | 6,710 ft | — | — |
| Ashton 1N, ID | 5,212 ft | May 21 | Sep 21 |
Frost dates near Island Park
- Macks Inn, ID 83433 · last —, first —
- West Yellowstone, MT 59758 · last —, first —
- Ashton, ID 83420 · last May 21, first Sep 21
- Chester, ID 83421 · last May 21, first Sep 21
- Saint Anthony, ID 83445 · last May 17, first Sep 22
- Parker, ID 83438 · last May 17, first Sep 22
- Newdale, ID 83436 · last May 17, first Sep 22
- Felt, ID 83424 · last Jun 15, first Sep 7
Frequently asked questions
- When is the last frost in Island Park, ID?
- Frost is possible in any month at the nearest NOAA station (Island Park, ID), so there is no reliable average last frost date.
- When is the first frost in Island Park, ID?
- 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.