# Frost dates for Broomfield, CO (80020)

**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 14 | Sep 26 | 135 |
| Median | May 2 | Oct 11 | 162 |
| Bold (9 in 10 years later) | Apr 18 | Oct 24 | 189 |

Frost = 32°F. Station: Northglenn, CO, 4 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 42°F — Go (tonight)
- 2026-11-03: 35°F — Cover
- 2026-11-04: 37°F — Wait
- 2026-11-05: 35°F — Cover
- 2026-11-06: 37°F — Wait
- 2026-11-07: 34°F — Cover
- 2026-11-08: 37°F — Wait

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 Northglenn, CO (4 mi, 115 ft higher than you). Not endorsed by NOAA. Nights: National Weather Service.

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