Los Altos, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Los Altos, a city in Santa Clara County, California.

Tonight

56°F

Partly Cloudy then Patchy Fog

Patchy fog after 4am. Partly cloudy, with a low around 56. South southwest wind 1 to 7 mph.

7-day forecast for Los Altos

When	Temp	Forecast	Wind	Precip
Tonight	56°F	Partly Cloudy then Patchy Fog	1 to 7 mph SSW	0%
Saturday	83°F	Patchy Fog then Mostly Sunny	1 to 8 mph NE	0%
Saturday Night	57°F	Mostly Cloudy	2 to 7 mph WNW	0%
Sunday	77°F	Mostly Cloudy	2 to 7 mph W	3%
Sunday Night	57°F	Mostly Cloudy then Patchy Fog	1 to 7 mph W	3%
Monday	80°F	Patchy Fog then Mostly Sunny	1 to 7 mph W	0%
Monday Night	57°F	Partly Cloudy	1 to 7 mph W	0%
Tuesday	83°F	Sunny	1 to 7 mph WSW	0%
Tuesday Night	58°F	Mostly Clear	0 to 7 mph WSW	0%
Wednesday	91°F	Sunny	0 to 7 mph W	0%
Wednesday Night	62°F	Mostly Clear	0 to 7 mph NW	0%
Thursday	92°F	Sunny	0 to 7 mph NW	0%
Thursday Night	62°F	Mostly Clear	1 to 7 mph W	0%
Friday	86°F	Sunny	1 to 8 mph W	0%

Forecast source: National Weather Service (api.weather.gov) for Los Altos (37.368, -122.097). Updated through the day.

Growing snapshot for Los Altos

Last spring frost

Jan 6

First fall frost

Dec 23

Growing season

353 days

Hardiness zone

More local growing data for Los Altos: nearby ZIP 94040 weather · frost dates · planting calendar · California frost dates

Nearby towns & communities

Alum Rock Burbank Cambrian Park Campbell Cupertino East Foothills East Palo Alto Fruitdale Gilroy Los Altos Hills Los Gatos Loyola Menlo Park Milpitas Monte Sereno Morgan Hill Mountain View Palo Alto San Jose San Martin Santa Clara Saratoga Stanford Sunnyvale

All California locations ›

Climate data from the nearest NOAA station, Moffett Federal Airfield, Ca (2.7 mi from Los Altos). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.