# Frost dates for Rock Springs, WY (82901)

**Do this (Safe, 2026-11-02):** Frost season started Sep 9. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | Jun 9 | Sep 9 | 92 |
| Median | May 24 | Sep 24 | 123 |
| Bold (9 in 10 years later) | May 8 | Oct 4 | 149 |

Frost = 32°F. Station: Rock Springs Fire Dept, WY, 2 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 35°F — Cover (tonight)
- 2026-11-02: 26°F — Cover
- 2026-11-03: 27°F — Cover
- 2026-11-04: 27°F — Cover
- 2026-11-05: 27°F — Cover
- 2026-11-06: 27°F — Cover
- 2026-11-07: 25°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 Rock Springs Fire Dept, WY (2 mi, 56 ft lower than you). Not endorsed by NOAA. Nights: National Weather Service.

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