# Frost dates for Green Bay, WI (54311)

**Do this (Safe, 2026-11-02):** Frost season started Sep 23. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 22 | Sep 23 | 124 |
| Median | May 7 | Oct 9 | 155 |
| Bold (9 in 10 years later) | Apr 24 | Oct 25 | 184 |

Frost = 32°F. Station: Green Bay Botanical, WI, 6 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 52°F — Go (tonight)
- 2026-11-02: 57°F — Go
- 2026-11-03: 57°F — Go
- 2026-11-04: 50°F — Go
- 2026-11-05: 43°F — Go
- 2026-11-06: 38°F — Wait
- 2026-11-07: 39°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 Green Bay Botanical, WI (6 mi, 115 ft higher than you). Not endorsed by NOAA. Nights: National Weather Service.

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