Alamo, CA Weather & Growing Conditions
This Afternoon
88°F
Sunny
Sunny. High near 88, with temperatures falling to around 83 in the afternoon. West southwest wind around 7 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 88°F | Sunny | 7 mph WSW | 0% |
| Tonight | 55°F | Partly Cloudy | 6 mph SSW | 0% |
| Sunday | 76°F | Mostly Cloudy | 6 mph SSW | 0% |
| Sunday Night | 55°F | Mostly Cloudy | 5 to 8 mph SSW | 0% |
| Monday | 78°F | Mostly Sunny | 8 mph SW | 0% |
| Monday Night | 55°F | Partly Cloudy | 7 mph SW | 0% |
| Tuesday | 81°F | Sunny | 3 to 7 mph SW | 0% |
| Tuesday Night | 55°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Wednesday | 94°F | Sunny | 1 to 5 mph W | 0% |
| Wednesday Night | 60°F | Mostly Clear | 0 to 5 mph WSW | 0% |
| Thursday | 96°F | Sunny | 0 to 6 mph W | 0% |
| Thursday Night | 60°F | Mostly Clear | 1 to 6 mph WSW | 0% |
| Friday | 88°F | Sunny | 3 to 7 mph WSW | 0% |
| Friday Night | 57°F | Mostly Clear | 3 to 7 mph SW | 0% |
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 Sep 20, 2026.