South San Francisco, CA Weather & Growing Conditions
Overnight
56°F
Partly Cloudy
Partly cloudy, with a low around 56. West southwest wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 56°F | Partly Cloudy | 5 mph WSW | 0% |
| Tuesday | 76°F | Haze then Sunny | 3 to 13 mph WSW | 1% |
| Tuesday Night | 57°F | Mostly Clear | 3 to 12 mph WSW | 1% |
| Wednesday | 76°F | Sunny | 3 to 12 mph WSW | 0% |
| Wednesday Night | 58°F | Partly Cloudy | 2 to 12 mph WSW | 0% |
| Thursday | 76°F | Mostly Sunny | 2 to 12 mph WSW | 0% |
| Thursday Night | 58°F | Partly Cloudy | 3 to 12 mph W | 0% |
| Friday | 78°F | Mostly Sunny | 2 to 12 mph W | 0% |
| Friday Night | 59°F | Partly Cloudy | 5 to 12 mph WSW | 0% |
| Saturday | 74°F | Sunny | 3 to 12 mph WSW | 0% |
| Saturday Night | 60°F | Mostly Clear | 8 to 12 mph WSW | 0% |
| Sunday | 71°F | Sunny | 8 to 15 mph WSW | 0% |
| Sunday Night | 58°F | Partly Cloudy | 10 to 15 mph WSW | 0% |
| Monday | 68°F | Mostly Sunny | 10 to 16 mph WSW | 0% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for South San Francisco, CA
Last spring frost
Dec 29
First fall frost
Dec 26
Growing season
365 days
Hardiness zone
10a
Explore more for South San Francisco, CA: full frost dates · planting calendar · California frost dates
Climate data from the nearest NOAA station, San Francisco Intl Ap, Ca (3.8 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.