# Frost dates for Brookfield, WI (53005)

**Do this (Safe, 2026-11-02):** Frost season started Sep 28. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 15 | Sep 28 | 136 |
| Median | Apr 30 | Oct 14 | 167 |
| Bold (9 in 10 years later) | Apr 16 | Oct 27 | 194 |

Frost = 32°F. Station: Brookfield Wwtp, WI, 3 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 59°F — Go (tonight)
- 2026-11-03: 57°F — Go
- 2026-11-04: 49°F — Go
- 2026-11-05: 43°F — Go
- 2026-11-06: 39°F — Wait
- 2026-11-07: 40°F — Wait
- 2026-11-08: 40°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 Brookfield Wwtp, WI (3 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/wi/brookfield · JSON: https://frostdatecalculator.com/p/wi/brookfield?format=json