Eureka, CA Weather & Growing Conditions

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

Today

70°F

Patchy Smoke

Patchy smoke. Sunny, with a high near 70. Southwest wind 6 to 10 mph.

7-day forecast for Eureka

When	Temp	Forecast	Wind	Precip
Today	70°F	Patchy Smoke	6 to 10 mph SW	0%
Tonight	58°F	Patchy Smoke then Patchy Fog	1 to 7 mph SSW	0%
Wednesday	70°F	Patchy Fog then Mostly Sunny	1 to 6 mph W	0%
Wednesday Night	56°F	Partly Cloudy	1 to 5 mph NNW	0%
Thursday	69°F	Mostly Sunny	1 to 6 mph NW	0%
Thursday Night	55°F	Mostly Cloudy	1 to 5 mph NNW	1%
Friday	69°F	Mostly Sunny	1 to 7 mph NNW	0%
Friday Night	56°F	Partly Cloudy	0 to 6 mph NW	0%
Saturday	68°F	Mostly Sunny	0 to 9 mph NNW	1%
Saturday Night	55°F	Partly Cloudy	2 to 9 mph NNW	1%
Sunday	66°F	Mostly Sunny	2 to 10 mph NNW	0%
Sunday Night	54°F	Partly Cloudy	2 to 10 mph NNW	0%
Monday	65°F	Mostly Sunny	2 to 10 mph NNW	0%
Monday Night	54°F	Partly Cloudy then Patchy Fog	1 to 10 mph NNW	1%

Forecast source: National Weather Service (api.weather.gov) for Eureka (40.798, -124.154). Updated through the day.

Growing snapshot for Eureka

Last spring frost

Feb 22

First fall frost

Dec 7

Growing season

293 days

Hardiness zone

More local growing data for Eureka: nearby ZIP 95501 weather · frost dates · planting calendar · California frost dates

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Climate data from the nearest NOAA station, Eureka Wfo Woodley Island, Ca (1 mi from Eureka). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.