San Lorenzo, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Lorenzo, a community in Alameda County, California.
This Afternoon
75°F
Sunny
Sunny. High near 75, with temperatures falling to around 72 in the afternoon. West wind around 10 mph.
7-day forecast for San Lorenzo
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 75°F | Sunny | 10 mph W | 0% |
| Tonight | 59°F | Partly Cloudy | 5 to 9 mph WSW | 0% |
| Saturday | 77°F | Mostly Sunny | 3 to 9 mph WSW | 0% |
| Saturday Night | 59°F | Mostly Cloudy | 5 to 8 mph WSW | 0% |
| Sunday | 71°F | Mostly Cloudy | 5 to 9 mph WSW | 4% |
| Sunday Night | 59°F | Mostly Cloudy | 5 to 9 mph WSW | 4% |
| Monday | 73°F | Mostly Sunny | 5 to 9 mph WSW | 0% |
| Monday Night | 59°F | Partly Cloudy | 3 to 9 mph WSW | 0% |
| Tuesday | 77°F | Mostly Sunny | 3 to 9 mph WSW | 0% |
| Tuesday Night | 59°F | Partly Cloudy | 1 to 9 mph SW | 0% |
| Wednesday | 86°F | Sunny | 1 to 8 mph SW | 0% |
| Wednesday Night | 62°F | Mostly Clear | 1 to 8 mph WSW | 0% |
| Thursday | 86°F | Sunny | 1 to 9 mph W | 0% |
| Thursday Night | 62°F | Partly Cloudy | 2 to 9 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Lorenzo (37.676, -122.136). Updated through the day.
Growing snapshot for San Lorenzo
Last spring frost
Jan 2
First fall frost
Dec 25
Growing season
365 days
Hardiness zone
10a
More local growing data for San Lorenzo: nearby ZIP 94580 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Alameda
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Berkeley
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Dublin
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Fairview
Fremont
Hayward
Kensington
Livermore
Mountain House
Newark
Oakland
Piedmont
Pleasanton
San Leandro
Sunol
Union City
Climate data from the nearest NOAA station, Hayward Air Terminal, Ca (1.9 mi from San Lorenzo). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.