# Frost dates for Sioux City, IA (51101)

**Do this (Safe, 2026-11-02):** Frost season started Sep 24. Keep covers ready for cold nights.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | May 11 | Sep 24 | 136 |
| Median | Apr 29 | Oct 7 | 161 |
| Bold (9 in 10 years later) | Apr 15 | Oct 21 | 189 |

Frost = 32°F. Station: Sioux City Ang, IA, 7 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 50°F — Go (tonight)
- 2026-11-03: 40°F — Wait
- 2026-11-04: 38°F — Wait
- 2026-11-05: 34°F — Cover
- 2026-11-06: 32°F — Cover
- 2026-11-07: 36°F — Cover
- 2026-11-08: 36°F — Cover

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 Sioux City Ang, IA (7 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

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