Los Alamos, CA Weather & Growing Conditions
Tonight
48°F
Partly Cloudy
Partly cloudy, with a low around 48. North northwest wind 5 to 10 mph. Chance of precipitation is 20%.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 48°F | Partly Cloudy | 5 to 10 mph NNW | 17% |
| Wednesday | 71°F | Mostly Sunny | 5 to 15 mph N | 0% |
| Wednesday Night | 52°F | Mostly Cloudy | 5 to 15 mph N | 0% |
| Thursday | 76°F | Mostly Sunny | 5 to 15 mph NNE | 0% |
| Thursday Night | 50°F | Mostly Clear | 5 to 15 mph NNE | 0% |
| Friday | 80°F | Sunny | 10 mph NNE | 0% |
| Friday Night | 52°F | Mostly Clear | 5 to 10 mph NNE | 0% |
| Saturday | 81°F | Sunny | 0 to 5 mph N | 0% |
| Saturday Night | 53°F | Mostly Clear | 0 to 5 mph NNE | 0% |
| Sunday | 82°F | Sunny | 0 to 5 mph NNW | 0% |
| Sunday Night | 55°F | Partly Cloudy | 0 to 5 mph NNE | 0% |
| Monday | 80°F | Mostly Sunny | 0 to 10 mph N | 0% |
| Monday Night | 54°F | Partly Cloudy | 0 to 10 mph N | 1% |
| Tuesday | 78°F | Sunny | 0 to 5 mph NW | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Los Alamos, CA
Last spring frost
Jan 20
First fall frost
Dec 19
Growing season
335 days
Hardiness zone
9b
Explore more for Los Alamos, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, Lompoc, Ca (13.5 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.