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Weather in Eureka, CA · National Weather Service + NOAA

Eureka stays cool in summer

Eureka has warm winters and cool summers, with plenty of rain. A typical July afternoon reaches 63°, a January night drops to 42°, and snow is almost unheard of. Normal November highs come to 58°, and lows to 44°.

Winter 55°/42°Spring 57°/45°Summer 63°/50°Fall 61°/47°
Right now
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Sunrise 9:48 am · sunset 8:11 pm

Getting the latest forecast from the National Weather Service…

What stands out about Eureka’s weather

Read from 30 years of NOAA records. Each one opens the full story on the Climate page.

Climate →
Cool summersJuly afternoons average 63°, cooler than 100% of U.S. towns.Snow is rareNo measurable snow in a normal year.The mildest winters aroundMilder January nights than all 5 towns around it.
A normal year

Where today sits in Eureka’s year

Typical highs and lows month by month, from 30 years of NOAA records.

Full climate →
Winter
55° / 42°
Snow is rare
Spring
57° / 45°
Last frost around Feb 22
Summer
63° / 50°
90° days are rare
Fall now
61° / 47°
First frost around Dec 7
35 daysuntil the usual first frost (Dec 7)
Best months to be outside
JulAugSep
Highs of 62–84° and lows of 40° or more
How much snow does Eureka get?Almost none.When is it wettest?December, with 9.4 inches.Is it warmer than it used to be?+1.4° vs. the 20th century.

Weather talk

Road reports, first frosts and storm memories from neighbors in Eureka.

Town Square →
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Forecast, conditions and alerts: National Weather Service. Climate: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Temperatures and rainfall come from NOAA’s gridded normals for Eureka itself (about a 3-mile square). Snow, frost dates and day counts: the NOAA station at Eureka Wfo Woodley Island, CA (1 mi). Sunrise and sunset are calculated from the town’s position. Normals are 30-year averages, not a forecast.