Eureka Weather Records

Eureka, California weather averages and records from 1941–2024 based on data made available by the NOAA.

All-Time Recorded High

The highest temperature ever recorded in Eureka, California was 87 °F which occurred on September 28, 2020.

Highest Temperatures: All-Time By Year

All-Time Recorded Low

The lowest temperature ever recorded in Eureka, California was 21 °F which occurred on December 9, 1972.

Lowest Temperatures: All-Time By Year

Eureka Weather by Month

Averages based on the years 1991–2020

Month	Average (°F)		Record (°F)		Average (inches)
Month	High ☀️	Low 🌙	High ☀️	Low 🌙	Precipitation 💧	Snow ❄️
January	55.6	41.4	78	25	6.7	0.0
February	55.9	41.9	80	27	5.6	0.0
March	56.5	42.9	76	30	5.7	0.0
April	57.8	44.8	80	32	3.6	0.0
May	60.2	48.3	83	35	1.7	0.0
June	62.4	50.6	85	40	0.7	0.0
July	63.6	52.9	77	45	0.2	0.0
August	64.7	53.6	82	45	0.2	0.0
September	64.4	51.1	87	41	0.7	0.0
October	62.1	47.4	87	32	2.3	0.0
November	58.3	43.6	78	29	4.9	0.0
December	55.1	40.5	77	21	8.1	0.0
Entire year	59.7	46.6	87	21	40.3	0.1

More Eureka Weather Records 1941–2024
Highest daily low	63 °F	January 18, 1981
Lowest daily high	34 °F	December 21, 1990
Greatest daily range (Difference of high and low)	40 °F	September 23, 2006
Greatest difference in daily high over two conscutive days	26 °F	Jan 11–12, 1986
Most daily precipitation	6.8 inches	December 27, 2002
Most monthly precipitation	23.3 inches	December 2002
Most yearly precipitation	67.2 inches	1983
Most yearly days with precipitation	174	1998
Earliest snow in season	November 19	1977
Latest snow in season	April 2	2003
Most daily snow	2.0 inches	February 4, 1989
Most monthly snow	3.5 inches	February 1989
Most yearly snow	3.5 inches	1989
Most snow in a winter	3.5 inches	1988–1989
Greatest snow accumulation	1.0 inches	February 4, 1989
Earliest freeze	November 9	2020
Earliest day ≥ 70 °F	January 5	2006
Latest freeze	March 31	2008
Latest day ≥ 70 °F	December 30	1963
Most days in a year < 32 °F	17	2013
Most days in a year ≥ 80 °F	3	2014

Eureka Weather Streaks Most consecutive days...
With precipitation	26 days	Mar 23 – Apr 17, 2006
Without precipitation	77 days	Jun 25 – Sep 9, 1967

Plant Hardiness Zone

Eureka is in plant hardiness zone 9B

based on average yearly minimum temperature from 1991–2020

Eureka Weather by Year

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Weather Station Details

Years	Station	Coordinates
1941–2024	Eureka Woodley Island	location