# Frost dates for Brighton, CO (80601)

**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 16 | Sep 26 | 133 |
| Median | May 3 | Oct 7 | 157 |
| Bold (9 in 10 years later) | Apr 22 | Oct 19 | 180 |

Frost = 32°F. Station: Brighton 3 SE, CO, 3 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 45°F — Go (tonight)
- 2026-11-02: 41°F — Go
- 2026-11-03: 34°F — Cover
- 2026-11-04: 35°F — Cover
- 2026-11-05: 33°F — Cover
- 2026-11-06: 35°F — Cover
- 2026-11-07: 32°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 Brighton 3 SE, CO (3 mi, 82 ft lower than you). Not endorsed by NOAA. Nights: National Weather Service.

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