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
79°F
Sunny
Sunny, with a high near 79. West wind around 10 mph.
7-day forecast for Alpine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 79°F | Sunny | 10 mph W | 1% |
| Tonight | 55°F | Mostly Clear | 0 to 5 mph N | 1% |
| Saturday | 82°F | Sunny | 0 to 10 mph NW | 0% |
| Saturday Night | 57°F | Mostly Clear | 0 to 5 mph SE | 0% |
| Sunday | 80°F | Mostly Sunny | 0 to 10 mph S | 0% |
| Sunday Night | 57°F | Mostly Cloudy | 0 to 5 mph SW | 2% |
| Monday | 76°F | Sunny | 0 to 10 mph SW | 2% |
| Monday Night | 54°F | Mostly Clear | 0 to 10 mph NW | 0% |
| Tuesday | 80°F | Sunny | 0 to 10 mph NW | 0% |
| Tuesday Night | 59°F | Mostly Clear | 0 to 5 mph N | 0% |
| Wednesday | 87°F | Sunny | 0 to 10 mph W | 4% |
| Wednesday Night | 64°F | Mostly Clear | 0 to 5 mph NE | 2% |
| Thursday | 88°F | Sunny | 0 to 5 mph W | 4% |
| Thursday Night | 67°F | Mostly Clear | 0 to 5 mph N | 2% |
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 Sep 19, 2026.