Rancho San Diego, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rancho San Diego, a community in San Diego County, California.
Overnight
65°F
Patchy Fog
Patchy fog. Mostly cloudy, with a low around 65. Southwest wind around 0 mph.
7-day forecast for Rancho San Diego
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 65°F | Patchy Fog | 0 mph | 0% |
| Tuesday | 86°F | Patchy Fog then Mostly Sunny | 0 to 10 mph SW | 1% |
| Tuesday Night | 65°F | Patchy Fog | 0 to 5 mph W | 1% |
| Wednesday | 86°F | Patchy Fog then Mostly Sunny | 0 to 10 mph W | 2% |
| Wednesday Night | 65°F | Mostly Clear then Patchy Fog | 0 to 5 mph S | 1% |
| Thursday | 88°F | Patchy Fog then Sunny | 0 to 10 mph SW | 1% |
| Thursday Night | 66°F | Mostly Clear then Patchy Fog | 0 to 5 mph W | 1% |
| Friday | 91°F | Patchy Fog then Sunny | 0 to 10 mph W | 1% |
| Friday Night | 66°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Saturday | 90°F | Sunny | 0 to 10 mph SW | 1% |
| Saturday Night | 66°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Sunday | 89°F | Sunny | 0 to 10 mph SW | 3% |
| Sunday Night | 66°F | Mostly Clear | 0 to 5 mph SW | 4% |
| Monday | 87°F | Sunny | 0 to 10 mph S | 7% |
Forecast source: National Weather Service (api.weather.gov) for Rancho San Diego (32.762, -116.920). Updated through the day.
Growing snapshot for Rancho San Diego
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10b
More local growing data for Rancho San Diego: nearby ZIP 92019 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, El Cajon, Ca (3.6 mi from Rancho San Diego). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.