Alpine, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Alpine, a community in San Diego County, California.
Today
88°F
Sunny
Sunny, with a high near 88. Southwest wind 0 to 10 mph.
7-day forecast for Alpine
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 88°F | Sunny | 0 to 10 mph SW | 1% |
| Tonight | 65°F | Mostly Clear | 0 to 5 mph NW | 1% |
| Wednesday | 88°F | Sunny | 0 to 10 mph W | 3% |
| Wednesday Night | 67°F | Mostly Clear | 0 to 5 mph SW | 2% |
| Thursday | 89°F | Sunny | 0 to 10 mph SW | 4% |
| Thursday Night | 68°F | Mostly Clear | 0 to 5 mph SW | 2% |
| Friday | 89°F | Sunny | 0 to 10 mph W | 1% |
| Friday Night | 68°F | Mostly Clear | 0 to 10 mph SW | 0% |
| Saturday | 92°F | Sunny | 0 to 10 mph SW | 2% |
| Saturday Night | 69°F | Mostly Clear | 0 to 10 mph SW | 1% |
| Sunday | 91°F | Sunny | 0 to 10 mph SW | 6% |
| Sunday Night | 67°F | Mostly Clear | 0 to 5 mph NW | 5% |
| Monday | 88°F | Sunny | 0 to 10 mph SW | 8% |
| Monday Night | 65°F | Mostly Clear | 0 to 10 mph NW | 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 Aug 4, 2026.