Ross, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Ross, a town in Marin County, California.
This Afternoon
60°F
Light Rain
Rain. Mostly cloudy. High near 60, with temperatures falling to around 56 in the afternoon. South southwest wind around 5 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch possible.
7-day forecast for Ross
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 60°F | Light Rain | 5 mph SSW | 92% |
| Tonight | 49°F | Chance Light Rain then Mostly Cloudy | 5 to 9 mph ENE | 45% |
| Wednesday | 64°F | Sunny | 2 to 9 mph N | 3% |
| Wednesday Night | 49°F | Partly Cloudy | 3 to 10 mph NW | 0% |
| Thursday | 69°F | Sunny | 3 mph NNW | 0% |
| Thursday Night | 49°F | Mostly Clear | 1 to 5 mph NW | 0% |
| Friday | 71°F | Sunny | 1 mph N | 0% |
| Friday Night | 51°F | Mostly Clear | 2 mph NNW | 0% |
| Saturday | 75°F | Sunny | 0 to 3 mph NE | 0% |
| Saturday Night | 52°F | Mostly Clear | 3 mph NW | 0% |
| Sunday | 74°F | Mostly Sunny | 2 mph NW | 0% |
| Sunday Night | 52°F | Partly Cloudy | 2 mph WNW | 0% |
| Monday | 71°F | Partly Sunny | 3 mph WNW | 2% |
| Monday Night | 51°F | Partly Cloudy | 3 mph NW | 2% |
Forecast source: National Weather Service (api.weather.gov) for Ross (37.964, -122.562). Updated through the day.
Growing snapshot for Ross
Last spring frost
Jan 16
First fall frost
Dec 18
Growing season
334 days
Hardiness zone
9b
More local growing data for Ross: nearby ZIP 94957 weather · frost dates · planting calendar · California frost dates
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Climate data from the nearest NOAA station, Kentfield, Ca (1 mi from Ross). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.