Rio Dell, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Rio Dell, a city in Humboldt County, California.
Today
64°F
Slight Chance Light Rain
A slight chance of rain before 1pm. Partly sunny, with a high near 64. Southeast wind 8 to 15 mph, with gusts as high as 21 mph. Chance of precipitation is 20%. New rainfall amounts less than a tenth of an inch possible.
7-day forecast for Rio Dell
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 64°F | Slight Chance Light Rain | 8 to 15 mph SE | 19% |
| Tonight | 45°F | Partly Cloudy | 3 to 8 mph SE | 4% |
| Wednesday | 59°F | Patchy Fog then Partly Sunny | 1 to 8 mph NW | 11% |
| Wednesday Night | 46°F | Patchy Fog | 1 to 6 mph WNW | 11% |
| Thursday | 59°F | Patchy Fog then Mostly Sunny | 1 to 7 mph N | 3% |
| Thursday Night | 44°F | Patchy Fog | 1 to 7 mph NNE | 1% |
| Friday | 61°F | Patchy Fog then Partly Sunny | 1 to 6 mph N | 1% |
| Friday Night | 46°F | Partly Cloudy | 1 to 6 mph NE | 0% |
| Saturday | 65°F | Mostly Sunny | 3 mph SE | 1% |
| Saturday Night | 48°F | Mostly Cloudy then Patchy Fog | 3 mph SSE | 14% |
| Sunday | 62°F | Areas Of Fog then Mostly Cloudy | 0 to 5 mph NW | 14% |
| Sunday Night | 48°F | Patchy Fog | 1 to 5 mph NE | 6% |
| Monday | 60°F | Patchy Fog then Mostly Cloudy | 1 to 5 mph S | 14% |
| Monday Night | 46°F | Chance Light Rain | 5 mph S | 26% |
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 3, 2026.