# Frost dates for Sierra Vista, AZ (85613)

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

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | Apr 21 | Oct 23 | 185 |
| Median | Apr 5 | Nov 9 | 218 |
| Bold (9 in 10 years later) | Mar 15 | Nov 23 | 253 |

Frost = 32°F. Station: Sierra Vista, AZ, 3 mi away.

## Next nights (NWS overnight low)

- 2026-11-02: 43°F — Go (tonight)
- 2026-11-03: 46°F — Go
- 2026-11-04: 47°F — Go
- 2026-11-05: 48°F — Go
- 2026-11-06: 47°F — Go
- 2026-11-07: 46°F — Go
- 2026-11-08: 46°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 Sierra Vista, AZ (3 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/az/sierra-vista · JSON: https://frostdatecalculator.com/p/az/sierra-vista?format=json