Arcata, CA Weather & Growing Conditions

Local forecast, frost dates, hardiness zone and planting guidance for Arcata, a city in Humboldt County, California.

Today

64°F

Patchy Fog then Mostly Cloudy

Patchy fog before 11am. Mostly cloudy, with a high near 64. Northwest wind 1 to 6 mph.

7-day forecast for Arcata

When	Temp	Forecast	Wind	Precip
Today	64°F	Patchy Fog then Mostly Cloudy	1 to 6 mph NW	0%
Tonight	50°F	Areas Of Fog	0 to 5 mph W	3%
Sunday	64°F	Areas Of Fog then Cloudy	0 to 6 mph WNW	3%
Sunday Night	52°F	Areas Of Fog	0 to 5 mph NW	1%
Monday	66°F	Areas Of Fog then Mostly Cloudy	0 to 5 mph NNW	0%
Monday Night	52°F	Areas Of Fog	0 to 5 mph NNE	0%
Tuesday	66°F	Areas Of Fog then Partly Sunny	0 to 7 mph NNW	0%
Tuesday Night	51°F	Partly Cloudy then Areas Of Fog	0 to 7 mph N	0%
Wednesday	66°F	Areas Of Fog then Mostly Sunny	0 to 7 mph N	0%
Wednesday Night	51°F	Mostly Cloudy then Patchy Fog	0 to 6 mph NNE	0%
Thursday	66°F	Patchy Fog then Partly Sunny	0 to 6 mph NW	1%
Thursday Night	52°F	Mostly Cloudy then Patchy Fog	0 to 5 mph N	2%
Friday	65°F	Partly Sunny	0 to 6 mph NNW	3%
Friday Night	51°F	Mostly Cloudy then Patchy Fog	1 to 6 mph NNE	5%

Forecast source: National Weather Service (api.weather.gov) for Arcata (40.862, -124.075). Updated through the day.

Growing snapshot for Arcata

Last spring frost

Feb 22

First fall frost

Dec 7

Growing season

293 days

Hardiness zone

More local growing data for Arcata: nearby ZIP 95521 weather · frost dates · planting calendar · California frost dates

Nearby towns & communities

Alderpoint 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 Rio Dell

All California locations ›

Climate data from the nearest NOAA station, Eureka Wfo Woodley Island, Ca (6.4 mi from Arcata). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.