San Leandro, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Leandro, a city in Alameda County, California.
Today
76°F
Sunny
Sunny. High near 76, with temperatures falling to around 72 in the afternoon. West southwest wind 3 to 10 mph.
7-day forecast for San Leandro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 3 to 10 mph WSW | 0% |
| Tonight | 58°F | Mostly Cloudy | 5 to 8 mph WSW | 0% |
| Sunday | 69°F | Mostly Cloudy | 5 to 9 mph WSW | 0% |
| Sunday Night | 58°F | Mostly Cloudy | 8 mph WSW | 1% |
| Monday | 71°F | Mostly Sunny | 6 to 10 mph WSW | 0% |
| Monday Night | 58°F | Partly Cloudy | 5 to 10 mph SW | 0% |
| Tuesday | 73°F | Mostly Sunny | 5 to 9 mph WSW | 0% |
| Tuesday Night | 58°F | Partly Cloudy | 2 to 9 mph SW | 0% |
| Wednesday | 82°F | Mostly Sunny | 1 to 8 mph SW | 0% |
| Wednesday Night | 61°F | Partly Cloudy | 1 to 8 mph WSW | 0% |
| Thursday | 84°F | Mostly Sunny | 1 to 9 mph WSW | 0% |
| Thursday Night | 61°F | Partly Cloudy | 2 to 9 mph WSW | 0% |
| Friday | 78°F | Mostly Sunny | 2 to 10 mph WSW | 0% |
| Friday Night | 59°F | Partly Cloudy | 3 to 10 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Leandro (37.703, -122.163). Updated through the day.
Growing snapshot for San Leandro
Last spring frost
Jan 7
First fall frost
Dec 23
Growing season
356 days
Hardiness zone
10a
More local growing data for San Leandro: nearby ZIP 94577 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Oakland Metro Intl Ap, Ca (2.8 mi from San Leandro). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.