Rainbow, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rainbow, a community in San Diego County, California.
Today
87°F
Patchy Fog then Sunny
Patchy fog before 8am. Sunny, with a high near 87. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
7-day forecast for Rainbow
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 87°F | Patchy Fog then Sunny | 5 to 15 mph SW | 1% |
| Tonight | 63°F | Patchy Fog | 0 to 10 mph SW | 1% |
| Wednesday | 87°F | Patchy Fog then Sunny | 5 to 15 mph SW | 0% |
| Wednesday Night | 63°F | Patchy Fog | 0 to 10 mph S | 0% |
| Thursday | 89°F | Patchy Fog then Sunny | 0 to 10 mph SW | 1% |
| Thursday Night | 64°F | Mostly Clear then Patchy Fog | 0 to 5 mph S | 1% |
| Friday | 90°F | Patchy Fog then Sunny | 0 to 10 mph NW | 0% |
| Friday Night | 64°F | Mostly Clear | 0 to 10 mph S | 0% |
| Saturday | 91°F | Sunny | 0 to 10 mph SW | 0% |
| Saturday Night | 64°F | Mostly Clear | 0 to 10 mph S | 0% |
| Sunday | 90°F | Sunny | 0 to 10 mph S | 2% |
| Sunday Night | 64°F | Mostly Clear | 0 to 10 mph S | 2% |
| Monday | 87°F | Sunny | 0 to 10 mph SW | 7% |
| Monday Night | 63°F | Mostly Clear | 0 to 10 mph S | 2% |
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 Aug 4, 2026.