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
82°F
Haze then Sunny
Haze between 7am and 8am. Sunny. High near 82, with temperatures falling to around 78 in the afternoon. West northwest wind 2 to 10 mph.
7-day forecast for San Leandro
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 82°F | Haze then Sunny | 2 to 10 mph WNW | 0% |
| Tonight | 59°F | Mostly Clear | 2 to 9 mph NW | 0% |
| Wednesday | 81°F | Mostly Sunny | 2 to 10 mph WNW | 0% |
| Wednesday Night | 60°F | Partly Cloudy | 2 to 9 mph W | 0% |
| Thursday | 80°F | Mostly Sunny | 2 to 10 mph W | 0% |
| Thursday Night | 60°F | Partly Cloudy | 2 to 10 mph W | 0% |
| Friday | 83°F | Mostly Sunny | 2 to 10 mph W | 0% |
| Friday Night | 62°F | Partly Cloudy | 2 to 10 mph WSW | 0% |
| Saturday | 80°F | Mostly Sunny | 2 to 10 mph WSW | 0% |
| Saturday Night | 62°F | Partly Cloudy | 5 to 10 mph WSW | 0% |
| Sunday | 76°F | Sunny | 5 to 12 mph WSW | 0% |
| Sunday Night | 60°F | Partly Cloudy | 8 to 12 mph WSW | 0% |
| Monday | 72°F | Mostly Sunny | 8 to 13 mph WSW | 0% |
| Monday Night | 59°F | Partly Cloudy | 7 to 13 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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Union City
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 Aug 4, 2026.