# Frost dates for Harrisburg, PA (17120)

**Do this (Safe, 2026-11-02):** Frost season started Oct 7. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 2 | Oct 7 | 158 |
| Median | Apr 15 | Oct 23 | 191 |
| Bold (9 in 10 years later) | Apr 1 | Nov 7 | 220 |

Frost = 32°F. Station: Harrisburg 1 NE, PA, 1 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 44°F — Go (tonight)
- 2026-11-03: 49°F — Go
- 2026-11-04: 60°F — Go
- 2026-11-05: 55°F — Go
- 2026-11-06: 49°F — Go
- 2026-11-07: 44°F — Go
- 2026-11-08: 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 Harrisburg 1 NE, PA (1 mi, 112 ft higher than you). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/pa/harrisburg · JSON: https://frostdatecalculator.com/p/pa/harrisburg?format=json