# Frost dates for Caldwell, ID (83607)

**Do this (Safe, 2026-11-02):** Frost season started Sep 29. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 18 | Sep 29 | 134 |
| Median | Apr 29 | Oct 13 | 167 |
| Bold (9 in 10 years later) | Apr 15 | Oct 28 | 196 |

Frost = 32°F. Station: Nampa Sugar Factory, ID, 5 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 33°F — Cover (tonight)
- 2026-11-02: 34°F — Cover
- 2026-11-03: 33°F — Cover
- 2026-11-04: 34°F — Cover
- 2026-11-05: 32°F — Cover
- 2026-11-06: 32°F — Cover
- 2026-11-07: 33°F — Cover

Go above 40°F · Wait 37–40°F · Cover 36°F or less · Freeze 28°F or less.

Source: Frost dates: NOAA NCEI U.S. Climate Normals 1991–2020, station Nampa Sugar Factory, ID (5 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/id/caldwell · JSON: https://frostdatecalculator.com/p/id/caldwell?format=json