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.
This Afternoon
66°F
Chance Light Rain
A chance of rain. Partly sunny. High near 66, with temperatures falling to around 62 in the afternoon. Southeast wind around 2 mph. Chance of precipitation is 30%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Los Altos
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 66°F | Chance Light Rain | 2 mph SE | 34% |
| Tonight | 50°F | Chance Light Rain then Mostly Cloudy | 3 mph S | 32% |
| Wednesday | 68°F | Patchy Fog then Sunny | 2 to 9 mph NNW | 2% |
| Wednesday Night | 50°F | Mostly Cloudy | 1 to 8 mph NW | 0% |
| Thursday | 71°F | Patchy Fog then Mostly Sunny | 1 to 6 mph NNW | 0% |
| Thursday Night | 50°F | Mostly Clear | 1 to 6 mph NNW | 0% |
| Friday | 74°F | Sunny | 1 to 5 mph NNE | 0% |
| Friday Night | 52°F | Clear | 0 to 5 mph NNE | 0% |
| Saturday | 77°F | Sunny | 0 to 3 mph N | 0% |
| Saturday Night | 51°F | Mostly Clear | 0 to 3 mph NW | 0% |
| Sunday | 75°F | Mostly Sunny | 1 to 5 mph NNW | 0% |
| Sunday Night | 53°F | Partly Cloudy | 1 to 5 mph WNW | 0% |
| Monday | 73°F | Partly Sunny | 1 to 6 mph NW | 1% |
| Monday Night | 52°F | Mostly Cloudy | 0 to 6 mph NW | 2% |
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
9b
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
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 Nov 4, 2026.