Alamo, CA Weather & Growing Conditions
Today
66°F
Sunny
Sunny. High near 66, with temperatures falling to around 62 in the afternoon. North northwest wind 2 to 6 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 66°F | Sunny | 2 to 6 mph NNW | 2% |
| Tonight | 46°F | Mostly Cloudy then Patchy Fog | 2 mph WSW | 2% |
| Thursday | 71°F | Patchy Fog then Mostly Sunny | 1 to 5 mph NNW | 0% |
| Thursday Night | 46°F | Clear | 1 mph N | 0% |
| Friday | 73°F | Sunny | 3 mph NNE | 0% |
| Friday Night | 47°F | Mostly Clear | 2 mph N | 0% |
| Saturday | 74°F | Sunny | 3 mph NE | 0% |
| Saturday Night | 47°F | Mostly Clear | 2 mph NW | 0% |
| Sunday | 72°F | Sunny | 3 mph NNW | 0% |
| Sunday Night | 49°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 70°F | Mostly Sunny | 3 mph WSW | 1% |
| Monday Night | 48°F | Partly Cloudy | 0 to 3 mph SW | 1% |
| Tuesday | 70°F | Sunny | 3 mph NW | 5% |
| Tuesday Night | 49°F | Mostly Clear | 0 to 3 mph SSW | 12% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Alamo, CA
Last spring frost
Mar 8
First fall frost
Dec 22
Growing season
282 days
Hardiness zone
9b
Explore more for Alamo, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Mt Diablo Junction, Ca (4.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.