Rio Dell, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rio Dell, a city in Humboldt County, California.
This Afternoon
64°F
Sunny
Sunny, with a high near 64. Southeast wind 1 to 9 mph. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Rio Dell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 64°F | Sunny | 1 to 9 mph SE | 12% |
| Tonight | 45°F | Partly Cloudy | 3 mph S | 2% |
| Wednesday | 59°F | Partly Sunny | 3 to 9 mph SW | 8% |
| Wednesday Night | 46°F | Mostly Cloudy then Patchy Fog | 6 mph W | 8% |
| Thursday | 59°F | Patchy Fog then Mostly Sunny | 5 to 9 mph WNW | 0% |
| Thursday Night | 44°F | Mostly Cloudy then Patchy Fog | 1 to 9 mph N | 0% |
| Friday | 61°F | Patchy Fog then Mostly Sunny | 1 to 6 mph NNE | 0% |
| Friday Night | 46°F | Partly Cloudy | 1 to 6 mph NE | 0% |
| Saturday | 64°F | Mostly Sunny | 3 mph S | 1% |
| Saturday Night | 48°F | Mostly Cloudy then Patchy Fog | 3 mph SSE | 14% |
| Sunday | 61°F | Patchy Fog | 1 to 5 mph SE | 14% |
| Sunday Night | 47°F | Patchy Fog | 1 to 5 mph ENE | 17% |
| Monday | 59°F | Patchy Fog then Mostly Cloudy | 1 to 5 mph SSW | 17% |
| Monday Night | 46°F | Slight Chance Light Rain | 5 mph SSE | 20% |
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
Cutten
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 Nov 4, 2026.