Frost dates for 83549Riggins, ID
Frost is possible in any month near Riggins, based on NOAA 1991-2020 records for the New Meadows Rs, 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) | — | — | 30 days | 100% |
| Frost / freeze (32°F) | — | — | 62 days | 100% |
| Hard freeze (28°F) | May 12 · Jun 1 · Jun 24 | Aug 25 · Sep 9 · Sep 24 | 96 days | 100% |
Where these dates come from
ZIP code 83549 is matched to the NOAA station New Meadows Rs, ID, 47.3 km away, at 3,862 ft elevation (236 ft lower than the ZIP code's center). Nearby stations for comparison:
| Station | Elevation | Avg last frost | Avg first frost |
|---|---|---|---|
| New Meadows Rs, ID (used) | 3,862 ft | — | — |
| Riggins, ID | 2,056 ft | May 6 | Oct 9 |
| Warren, ID | 5,907 ft | — | — |
| Mccall Ap, ID | 5,013 ft | Jun 10 | Sep 10 |
Frost dates near Riggins
- Pollock, ID 83547 · last May 6, first Oct 9
- Lucile, ID 83542 · last May 9, first Oct 3
- White Bird, ID 83554 · last May 6, first Oct 9
- Imnaha, OR 97842 · last Jun 8, first Sep 5
- New Meadows, ID 83654 · last —, first —
- Warren, ID 83671 · last —, first —
- McCall, ID 83638 · last Jun 22, first Sep 2
- Grangeville, ID 83530 · last May 9, first Oct 3
Frequently asked questions
- When is the last frost in Riggins, ID?
- Frost is possible in any month at the nearest NOAA station (New Meadows Rs, ID), so there is no reliable average last frost date.
- When is the first frost in Riggins, 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.