Eureka, CA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Eureka, a city in Humboldt County, California.
Tonight
44°F
Partly Cloudy
Partly cloudy, with a low around 44. South wind 2 to 7 mph.
7-day forecast for Eureka
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 44°F | Partly Cloudy | 2 to 7 mph S | 2% |
| Wednesday | 61°F | Patchy Fog then Slight Chance Light Rain | 2 to 6 mph WSW | 18% |
| Wednesday Night | 48°F | Slight Chance Light Rain then Patchy Fog | 1 to 6 mph N | 18% |
| Thursday | 60°F | Mostly Sunny | 2 to 7 mph N | 2% |
| Thursday Night | 44°F | Mostly Cloudy | 2 to 7 mph NNE | 0% |
| Friday | 61°F | Partly Sunny | 1 to 5 mph NNE | 0% |
| Friday Night | 46°F | Partly Cloudy | 3 mph NE | 0% |
| Saturday | 62°F | Partly Sunny | 3 mph S | 2% |
| Saturday Night | 50°F | Mostly Cloudy then Slight Chance Light Rain | 6 mph S | 23% |
| Sunday | 60°F | Slight Chance Light Rain | 3 mph SE | 23% |
| Sunday Night | 49°F | Patchy Fog then Slight Chance Light Rain | 3 mph ENE | 18% |
| Monday | 59°F | Slight Chance Light Rain then Patchy Fog | 1 to 5 mph S | 18% |
| Monday Night | 47°F | Slight Chance Light Rain | 5 mph S | 22% |
| Tuesday | 61°F | Chance Light Rain | 5 mph S | 31% |
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
9b
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 Nov 4, 2026.