# Frost dates for Littleton, CO (80120)

**Do this (Safe, 2026-11-02):** Frost season started Sep 27. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 17 | Sep 27 | 133 |
| Median | May 2 | Oct 11 | 162 |
| Bold (9 in 10 years later) | Apr 20 | Oct 23 | 186 |

Frost = 32°F. Station: Marston Fltr Plt, CO, 3 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 39°F — Wait (tonight)
- 2026-11-03: 33°F — Cover
- 2026-11-04: 34°F — Cover
- 2026-11-05: 31°F — Cover
- 2026-11-06: 33°F — Cover
- 2026-11-07: 31°F — Cover
- 2026-11-08: 35°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 Marston Fltr Plt, CO (3 mi, 213 ft higher than you). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/co/littleton · JSON: https://frostdatecalculator.com/p/co/littleton?format=json