Casa de Oro-Mount Helix, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Casa de Oro-Mount Helix, a community in San Diego County, California.
Today
73°F
Mostly Sunny
Mostly sunny, with a high near 73. Northwest wind 5 to 10 mph.
7-day forecast for Casa de Oro-Mount Helix
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 73°F | Mostly Sunny | 5 to 10 mph NW | 1% |
| Tonight | 57°F | Slight Chance Rain Showers | 0 to 5 mph N | 18% |
| Wednesday | 73°F | Mostly Sunny | 0 to 5 mph NW | 1% |
| Wednesday Night | 56°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Thursday | 77°F | Sunny | 0 to 5 mph W | 0% |
| Thursday Night | 56°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Friday | 82°F | Sunny | 0 to 5 mph N | 0% |
| Friday Night | 57°F | Clear | 5 to 10 mph NE | 0% |
| Saturday | 86°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 60°F | Mostly Clear | 5 to 10 mph NE | 0% |
| Sunday | 87°F | Sunny | 5 to 10 mph NW | 0% |
| Sunday Night | 62°F | Partly Cloudy | 5 to 10 mph NE | 0% |
| Monday | 84°F | Mostly Sunny | 0 to 5 mph W | 0% |
| Monday Night | 61°F | Partly Cloudy | 0 to 5 mph N | 0% |
Forecast source: National Weather Service (api.weather.gov) for Casa de Oro-Mount Helix (32.764, -116.969). Updated through the day.
Growing snapshot for Casa de Oro-Mount Helix
Last spring frost
Jan 6
First fall frost
Dec 21
Growing season
350 days
Hardiness zone
10b
More local growing data for Casa de Oro-Mount Helix: nearby ZIP 91941 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, El Cajon, Ca (4.9 mi from Casa de Oro-Mount Helix). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 3, 2026.