# Frost dates for San Francisco, CA

**Do this (Safe, 2026-11-02):** 24 days until first frost (Nov 26). Tender plants OK outdoors.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | Mar 13 | Nov 26 | 258 |
| Median | Dec 30 | Dec 25 | -5 |
| Bold (9 in 10 years later) | Dec 2 | Feb 13 | -292 |

Frost = 32°F. Station: San Francisco Oceanside, CA, 29 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 56°F — Go (tonight)
- 2026-11-02: 57°F — Go
- 2026-11-03: 56°F — Go
- 2026-11-04: 58°F — Go
- 2026-11-05: 58°F — Go
- 2026-11-06: 58°F — Go
- 2026-11-07: 59°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 San Francisco Oceanside, CA (29 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/ca/san-francisco · JSON: https://frostdatecalculator.com/p/ca/san-francisco?format=json