# Frost dates for Berwyn, IL (60402)

**Do this (Safe, 2026-11-02):** Frost season started Oct 20. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | Apr 27 | Oct 20 | 176 |
| Median | Apr 11 | Oct 31 | 203 |
| Bold (9 in 10 years later) | Mar 30 | Nov 14 | 229 |

Frost = 32°F. Station: Chicago Midway AP, IL, 4 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 57°F — Go (tonight)
- 2026-11-02: 61°F — Go
- 2026-11-03: 60°F — Go
- 2026-11-04: 51°F — Go
- 2026-11-05: 48°F — Go
- 2026-11-06: 44°F — Go
- 2026-11-07: 44°F — Go

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 Chicago Midway AP, IL (4 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/il/berwyn · JSON: https://frostdatecalculator.com/p/il/berwyn?format=json