San Francisco, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for San Francisco, a city in Marin County, California.
Overnight
54°F
Haze
Haze. Mostly cloudy, with a low around 54. South wind around 6 mph.
7-day forecast for San Francisco
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 54°F | Haze | 6 mph S | 0% |
| Tuesday | 59°F | Haze then Mostly Cloudy | 8 mph SSW | 0% |
| Tuesday Night | 56°F | Patchy Smoke | 7 mph SSW | 0% |
| Wednesday | 60°F | Partly Sunny | 7 mph SSW | 0% |
| Wednesday Night | 57°F | Mostly Cloudy then Patchy Fog | 5 mph WSW | 0% |
| Thursday | 61°F | Patchy Fog | 2 to 6 mph W | 0% |
| Thursday Night | 57°F | Mostly Cloudy | 8 mph WNW | 0% |
| Friday | 61°F | Partly Sunny | 7 to 12 mph NW | 0% |
| Friday Night | 58°F | Partly Cloudy | 12 mph NW | 0% |
| Saturday | 62°F | Mostly Sunny | 8 to 13 mph NW | 0% |
| Saturday Night | 58°F | Partly Cloudy | 13 to 24 mph NW | 0% |
| Sunday | 61°F | Mostly Sunny | 21 to 24 mph NW | 0% |
| Sunday Night | 57°F | Partly Cloudy | 23 mph NW | 0% |
| Monday | 60°F | Mostly Sunny | 14 to 22 mph WNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for San Francisco (37.727, -123.032). Updated through the day.
Growing snapshot for San Francisco
Last spring frost
Jan 11
First fall frost
Dec 21
Growing season
349 days
Hardiness zone
9b
More local growing data for San Francisco: nearby ZIP 94956 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Alto
Belvedere
Black Point-Green Point
Bolinas
Corte Madera
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Inverness
Kentfield
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Lucas Valley-Marinwood
Marin City
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Point Reyes Station
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Climate data from the nearest NOAA station, San Rafael Civic Ctr, Ca (15.4 mi from San Francisco). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.