Los Alamos, CA Weather & Growing Conditions
Tonight
55°F
Patchy Fog
Patchy fog after 11pm. Mostly cloudy, with a low around 55. Northwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 55°F | Patchy Fog | 5 mph NW | 0% |
| Saturday | 80°F | Patchy Fog then Mostly Sunny | 5 to 10 mph NW | 0% |
| Saturday Night | 57°F | Patchy Fog | 0 to 10 mph NNW | 0% |
| Sunday | 77°F | Patchy Fog then Partly Sunny | 0 to 10 mph WNW | 1% |
| Sunday Night | 55°F | Patchy Fog | 5 to 10 mph NW | 1% |
| Monday | 74°F | Patchy Fog then Mostly Sunny | 5 to 15 mph WNW | 0% |
| Monday Night | 53°F | Partly Cloudy | 0 to 10 mph NW | 0% |
| Tuesday | 79°F | Mostly Sunny | 0 to 10 mph NW | 0% |
| Tuesday Night | 56°F | Mostly Clear | 0 to 10 mph NNW | 0% |
| Wednesday | 89°F | Sunny | 0 to 10 mph WNW | 0% |
| Wednesday Night | 61°F | Mostly Clear | 0 to 10 mph NNE | 0% |
| Thursday | 89°F | Sunny | 0 to 10 mph SSW | 0% |
| Thursday Night | 61°F | Partly Cloudy | 0 to 10 mph NNE | 0% |
| Friday | 86°F | Mostly Sunny | 0 to 10 mph WSW | 0% |
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 Sep 19, 2026.