Alpine, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alpine, a community in San Diego County, California.
This Afternoon
70°F
Mostly Sunny
Mostly sunny, with a high near 70. West wind 5 to 10 mph.
7-day forecast for Alpine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Sunny | 5 to 10 mph W | 3% |
| Tonight | 54°F | Mostly Cloudy | 5 mph NW | 8% |
| Wednesday | 70°F | Sunny | 5 mph NW | 0% |
| Wednesday Night | 54°F | Mostly Clear | 0 to 5 mph E | 0% |
| Thursday | 74°F | Sunny | 0 to 5 mph N | 0% |
| Thursday Night | 55°F | Mostly Clear | 0 to 5 mph NE | 0% |
| Friday | 77°F | Sunny | 5 mph NE | 0% |
| Friday Night | 57°F | Clear | 5 to 10 mph NE | 0% |
| Saturday | 79°F | Sunny | 5 to 10 mph NE | 0% |
| Saturday Night | 60°F | Mostly Clear | 5 to 15 mph E | 0% |
| Sunday | 80°F | Sunny | 5 to 10 mph NE | 0% |
| Sunday Night | 62°F | Partly Cloudy | 5 to 15 mph NE | 0% |
| Monday | 79°F | Mostly Sunny | 5 mph N | 0% |
| Monday Night | 60°F | Partly Cloudy | 0 to 5 mph NE | 1% |
Forecast source: National Weather Service (api.weather.gov) for Alpine (32.842, -116.756). Updated through the day.
Growing snapshot for Alpine
Last spring frost
Feb 12
First fall frost
Dec 24
Growing season
317 days
Hardiness zone
9b
More local growing data for Alpine: nearby ZIP 91901 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Alpine, Ca (3.3 mi from Alpine). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.