Mountain House, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Mountain House, a community in Alameda County, California.
This Afternoon
85°F
Sunny
Sunny, with a high near 85. Northwest wind around 10 mph, with gusts as high as 21 mph.
7-day forecast for Mountain House
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 85°F | Sunny | 10 mph NW | 0% |
| Tonight | 60°F | Clear | 7 to 16 mph WSW | 0% |
| Saturday | 90°F | Sunny | 5 to 8 mph W | 0% |
| Saturday Night | 62°F | Mostly Cloudy | 7 to 12 mph WSW | 0% |
| Sunday | 84°F | Partly Sunny | 9 mph W | 1% |
| Sunday Night | 61°F | Mostly Cloudy | 9 to 14 mph W | 1% |
| Monday | 86°F | Sunny | 12 mph W | 0% |
| Monday Night | 60°F | Mostly Clear | 6 to 10 mph W | 0% |
| Tuesday | 90°F | Sunny | 7 mph W | 0% |
| Tuesday Night | 63°F | Clear | 2 to 7 mph WSW | 0% |
| Wednesday | 95°F | Sunny | 2 to 6 mph NW | 0% |
| Wednesday Night | 68°F | Mostly Clear | 3 mph W | 0% |
| Thursday | 97°F | Sunny | 2 to 6 mph WNW | 0% |
| Thursday Night | 68°F | Mostly Clear | 8 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Mountain House (37.767, -121.545). Updated through the day.
Growing snapshot for Mountain House
Last spring frost
Jan 19
First fall frost
Dec 10
Growing season
330 days
Hardiness zone
9b
More local growing data for Mountain House: nearby ZIP 95391 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Tracy Pumping Plt, Ca (1.3 mi from Mountain House). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 18, 2026.