# Frost dates for Billings, MT (59101)

**Do this (Safe, 2026-11-02):** Frost season started Sep 26. 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 26 | 131 |
| Median | May 4 | Oct 7 | 156 |
| Bold (9 in 10 years later) | Apr 20 | Oct 21 | 184 |

Frost = 32°F. Station: Billings Logan Intl AP, MT, 1 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 40°F — Wait (tonight)
- 2026-11-02: 31°F — Cover
- 2026-11-03: 33°F — Cover
- 2026-11-04: 32°F — Cover
- 2026-11-05: 33°F — Cover
- 2026-11-06: 36°F — Cover
- 2026-11-07: 34°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 Billings Logan Intl AP, MT (1 mi, 308 ft higher than you). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/mt/billings · JSON: https://frostdatecalculator.com/p/mt/billings?format=json