Harman US

Rio Dell, CA Weather & Growing Conditions

Tonight
52°F
Mostly Cloudy
Mostly cloudy, with a low around 52. North wind 3 to 8 mph.

7-day forecast

WhenTempForecastWindPrecip
Tonight 52°F Mostly Cloudy 3 to 8 mph N 4%
Saturday 63°F Mostly Cloudy 3 to 8 mph NNW 4%
Saturday Night 52°F Mostly Cloudy 3 to 8 mph NNW 5%
Sunday 63°F Mostly Cloudy 3 to 8 mph NNW 4%
Sunday Night 53°F Mostly Cloudy 2 to 8 mph N 4%
Monday 66°F Partly Sunny 2 to 7 mph N 0%
Monday Night 53°F Mostly Cloudy 2 to 7 mph N 0%
Tuesday 65°F Partly Sunny 3 to 8 mph N 0%
Tuesday Night 52°F Partly Cloudy 2 to 8 mph N 0%
Wednesday 70°F Patchy Fog then Mostly Sunny 1 to 6 mph N 0%
Wednesday Night 53°F Partly Cloudy 0 to 6 mph N 0%
Thursday 71°F Mostly Sunny 0 to 3 mph N 1%
Thursday Night 54°F Mostly Cloudy 0 to 3 mph N 1%
Friday 67°F Mostly Sunny 0 to 6 mph N 5%

Forecast source: National Weather Service (api.weather.gov). Updated through the day.

Growing snapshot for Rio Dell, CA

Last spring frost
Feb 1
First fall frost
Dec 19
Growing season
328 days
Hardiness zone
9b

Explore more for Rio Dell, CA: full frost dates · planting calendar · California frost dates

Climate data from the nearest NOAA station, Scotia, Ca (5.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.