Arcata, CA Weather & Growing Conditions

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

Overnight

55°F

Partly Cloudy

Partly cloudy, with a low around 55. Southeast wind around 1 mph.

7-day forecast for Arcata

When	Temp	Forecast	Wind	Precip
Overnight	55°F	Partly Cloudy	1 mph SE	0%
Tuesday	76°F	Patchy Smoke	1 to 7 mph SW	0%
Tuesday Night	60°F	Patchy Fog	0 to 6 mph SSW	0%
Wednesday	73°F	Patchy Smoke then Mostly Sunny	0 to 7 mph WNW	0%
Wednesday Night	57°F	Partly Cloudy	0 to 5 mph W	0%
Thursday	72°F	Mostly Sunny	0 to 5 mph NW	0%
Thursday Night	56°F	Partly Cloudy	0 to 5 mph NNW	0%
Friday	72°F	Mostly Sunny	0 to 5 mph NW	0%
Friday Night	56°F	Partly Cloudy	0 to 5 mph NW	0%
Saturday	70°F	Mostly Sunny	0 to 7 mph NNW	0%
Saturday Night	54°F	Partly Cloudy	0 to 7 mph N	1%
Sunday	67°F	Mostly Sunny	0 to 8 mph NNW	0%
Sunday Night	53°F	Partly Cloudy then Patchy Fog	0 to 8 mph NNW	0%
Monday	67°F	Patchy Fog then Mostly Sunny	0 to 8 mph NNW	0%

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 Aug 4, 2026.