Rio Dell, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rio Dell, a city in Humboldt County, California.
Tonight
51°F
Mostly Cloudy
Mostly cloudy, with a low around 51. Northwest wind 2 to 8 mph.
7-day forecast for Rio Dell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Cloudy | 2 to 8 mph NW | 3% |
| Saturday | 65°F | Mostly Cloudy | 2 to 9 mph NW | 4% |
| Saturday Night | 51°F | Mostly Cloudy | 2 to 8 mph NNW | 5% |
| Sunday | 64°F | Mostly Cloudy | 2 to 7 mph NNW | 3% |
| Sunday Night | 52°F | Mostly Cloudy | 2 to 7 mph NNW | 3% |
| Monday | 66°F | Partly Sunny | 2 to 8 mph NNW | 0% |
| Monday Night | 52°F | Mostly Cloudy | 2 to 8 mph NNW | 0% |
| Tuesday | 66°F | Partly Sunny | 2 to 9 mph NNW | 0% |
| Tuesday Night | 51°F | Mostly Cloudy | 2 to 9 mph N | 0% |
| Wednesday | 70°F | Mostly Sunny | 2 to 8 mph N | 0% |
| Wednesday Night | 52°F | Partly Cloudy | 1 to 7 mph NNE | 0% |
| Thursday | 72°F | Mostly Sunny | 0 to 6 mph NNW | 1% |
| Thursday Night | 53°F | Mostly Cloudy | 1 to 6 mph NNW | 1% |
| Friday | 68°F | Partly Sunny | 1 to 8 mph NNW | 5% |
Forecast source: National Weather Service (api.weather.gov) for Rio Dell (40.496, -124.115). Updated through the day.
Growing snapshot for Rio Dell
Last spring frost
Feb 1
First fall frost
Dec 19
Growing season
328 days
Hardiness zone
9b
More local growing data for Rio Dell: nearby ZIP 95562 weather · frost dates · planting calendar · California frost dates
Nearby towns & communities
Alderpoint
Arcata
Bayview
Benbow
Big Lagoon
Blue Lake
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Eureka
Fairhaven
Ferndale
Fieldbrook
Fields Landing
Fortuna
Garberville
Hoopa
Humboldt Hill
Hydesville
Indianola
Kep'el
Loleta
Manila
McKinleyville
Miranda
Myers Flat
Myrtletown
Orick
Phillipsville
Pine Hills
Redcrest
Redway
Climate data from the nearest NOAA station, Scotia, Ca (2.9 mi from Rio Dell). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.