# Frost dates for Riverside, CA (92506)

**Do this (Safe, 2026-11-02):** 29 days until first frost (Dec 1). Tender plants OK outdoors.

| Risk | Last spring frost | First fall frost | Frost-free days |
|---|---|---|---|
| Safe (1 in 10 years later) | Feb 25 | Dec 1 | 279 |
| Median | Jan 9 | Dec 25 | 350 |
| Bold (9 in 10 years later) | Dec 16 | Jan 27 | -323 |

Frost = 32°F. Station: Riverside Fire Stn 3, CA, 1 mi away.

## Next nights (NWS overnight low)

- 2026-11-01: 51°F — Go (tonight)
- 2026-11-02: 54°F — Go
- 2026-11-03: 54°F — Go
- 2026-11-04: 55°F — Go
- 2026-11-05: 55°F — Go
- 2026-11-06: 57°F — Go
- 2026-11-07: 57°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 Riverside Fire Stn 3, CA (1 mi, about your height). Not endorsed by NOAA. Nights: National Weather Service.

Page: https://frostdatecalculator.com/p/ca/riverside · JSON: https://frostdatecalculator.com/p/ca/riverside?format=json