Rainbow, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rainbow, a community in San Diego County, California.
Today
74°F
Mostly Sunny
Mostly sunny, with a high near 74. Southwest wind 5 to 10 mph.
7-day forecast for Rainbow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Mostly Sunny | 5 to 10 mph SW | 3% |
| Tonight | 55°F | Partly Cloudy | 0 to 5 mph SE | 3% |
| Wednesday | 72°F | Sunny | 0 to 5 mph S | 0% |
| Wednesday Night | 54°F | Mostly Clear | 0 to 10 mph NE | 0% |
| Thursday | 77°F | Sunny | 0 to 10 mph NW | 0% |
| Thursday Night | 57°F | Mostly Clear | 0 to 10 mph E | 0% |
| Friday | 80°F | Sunny | 5 to 10 mph N | 0% |
| Friday Night | 58°F | Clear | 5 to 15 mph NE | 0% |
| Saturday | 84°F | Sunny | 5 to 15 mph N | 0% |
| Saturday Night | 61°F | Mostly Clear | 5 to 15 mph NE | 0% |
| Sunday | 84°F | Sunny | 5 to 15 mph SE | 0% |
| Sunday Night | 62°F | Partly Cloudy | 5 to 15 mph NE | 0% |
| Monday | 82°F | Mostly Sunny | 0 to 10 mph N | 0% |
| Monday Night | 60°F | Partly Cloudy | 5 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Rainbow (33.410, -117.139). Updated through the day.
Growing snapshot for Rainbow
Last spring frost
Feb 2
First fall frost
Jan 30
Growing season
365 days
Hardiness zone
10a
More local growing data for Rainbow: nearby ZIP 92028 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Fallbrook 5 Ne, Ca (4.2 mi from Rainbow). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.