Eureka Weather in 2021

Historical record of Eureka, California weather for the year 2021 based on NOAA data.

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2021 Eureka Weather Extremes
Highest temperature	77 °F	September 21
Lowest temperature	31 °F	March 16
Highest daily low	57 °F	August 6
Lowest daily high	44 °F	December 27
Most daily precipitation	1.8 inches	March 5
Most daily snow	none	-
Total annual precipitation	33.0 inches	-
Total annual snow	none	-

What was the hottest temperature in Eureka in 2021?

The highest temperature recorded in Eureka, California in 2021 was 77 °F which happened on September 21.

Highest Temperatures: All-Time By Year

Highest Temperatures in Eureka in 2021

Rank	Temperature	Date
1	77 °F	Sep 21
2	75 °F	Jun 12
3	73 °F	Nov 3
3	73 °F	Oct 21
5	71 °F	Jun 13
5	71 °F	Mar 31
7	69 °F	Aug 16
7	69 °F	Jun 11
9	68 °F	Nov 2
9	68 °F	Sep 24

What was the coldest temperature in Eureka in 2021?

The lowest temperature recorded in Eureka, California in 2021 was 31 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Eureka in 2021

Rank	Temperature	Date
1	31 °F	March 16
1	31 °F	January 26
3	32 °F	February 4
3	32 °F	January 29
5	33 °F	December 31
5	33 °F	December 10
5	33 °F	January 25
5	33 °F	January 20
9	34 °F	December 30
9	34 °F	December 29
9	34 °F	December 17
9	34 °F	December 14
9	34 °F	March 17
9	34 °F	March 11
9	34 °F	February 5

January 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	59	41	0.43
January 2	57	42	0.07
January 3	60	51	0.06
January 4	58	41	0.53
January 5	59	37	0.00
January 6	57	41	0.41
January 7	57	38	0.17
January 8	56	41	0.05
January 9	59	36	0.07
January 10	55	47	0.14
January 11	62	42	0.00
January 12	61	55	0.81
January 13	60	51	0.30
January 14	61	42	0.00
January 15	56	47	0.00
January 16	50	46	0.00
January 17	58	40	0.00
January 18	58	40	0.00
January 19	60	35	0.00
January 20	59	33	0.00
January 21	54	38	0.29
January 22	52	42	0.17
January 23	52	35	0.00
January 24	46	39	0.42
January 25	48	33	0.13
January 26	44	31	0.79
January 27	49	40	1.51
January 28	51	36	0.54
January 29	52	32	0.01
January 30	57	46	0.02
January 31	58	51	0.18

February 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	58	47	0.51
February 2	54	43	0.27
February 3	52	35	0.37
February 4	52	32	0.00
February 5	53	34	0.00
February 6	53	44	0.00
February 7	52	40	0.00
February 8	49	41	0.00
February 9	54	39	0.01
February 10	55	37	0.00
February 11	52	42	0.73
February 12	54	45	0.37
February 13	55	43	0.29
February 14	51	43	0.43
February 15	53	47	0.36
February 16	54	43	0.05
February 17	53	35	0.00
February 18	50	42	0.60
February 19	54	46	0.21
February 20	52	39	0.10
February 21	54	35	0.00
February 22	54	44	0.00
February 23	53	41	0.00
February 24	51	38	0.00
February 25	54	37	0.00
February 26	51	40	0.02
February 27	53	41	0.00
February 28	53	35	0.00

March 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	56	37	0.00
March 2	58	35	0.00
March 3	51	39	0.00
March 4	66	40	0.00
March 5	57	40	1.76
March 6	53	40	0.02
March 7	54	39	0.13
March 8	52	37	0.12
March 9	51	41	0.41
March 10	53	39	0.01
March 11	54	34	0.00
March 12	54	41	0.00
March 13	54	45	0.00
March 14	54	39	0.78
March 15	50	41	0.00
March 16	49	31	0.00
March 17	55	34	0.00
March 18	60	44	0.18
March 19	55	41	0.31
March 20	53	41	0.08
March 21	53	36	0.00
March 22	54	41	0.01
March 23	52	37	0.00
March 24	52	37	0.12
March 25	52	40	0.00
March 26	55	36	0.00
March 27	59	37	0.00
March 28	52	42	0.00
March 29	52	39	0.00
March 30	55	35	0.00
March 31	71	37	0.00

April 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	61	40	0.00
April 2	53	45	0.00
April 3	54	46	0.00
April 4	54	45	0.00
April 5	56	43	0.00
April 6	54	37	0.00
April 7	53	46	0.00
April 8	55	42	0.00
April 9	51	43	0.00
April 10	54	40	0.00
April 11	54	36	0.00
April 12	56	37	0.00
April 13	57	39	0.00
April 14	62	38	0.00
April 15	57	38	0.00
April 16	54	44	0.00
April 17	52	44	0.00
April 18	54	44	0.00
April 19	54	46	0.01
April 20	56	48	0.08
April 21	55	47	0.00
April 22	56	46	0.00
April 23	55	44	0.04
April 24	57	47	0.13
April 25	55	44	0.42
April 26	55	43	0.03
April 27	57	38	0.00
April 28	58	46	0.00
April 29	57	47	0.00
April 30	57	44	0.00

May 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	59	50	0.03
May 2	58	48	0.00
May 3	60	46	0.00
May 4	59	49	0.00
May 5	56	48	0.00
May 6	58	47	0.04
May 7	57	45	0.00
May 8	57	39	0.00
May 9	58	46	0.00
May 10	59	48	0.00
May 11	60	46	0.00
May 12	54	45	0.00
May 13	54	47	0.00
May 14	55	47	0.02
May 15	58	48	0.00
May 16	54	47	0.01
May 17	59	46	0.01
May 18	58	45	0.00
May 19	57	43	0.00
May 20	57	46	0.00
May 21	57	44	0.00
May 22	56	41	0.00
May 23	59	44	0.00
May 24	62	49	0.09
May 25	60	51	0.03
May 26	57	43	0.00
May 27	63	43	0.02
May 28	59	48	0.00
May 29	55	49	0.00
May 30	58	49	0.00
May 31	62	45	0.00

June 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	58	48	0.00
June 2	57	50	0.00
June 3	60	51	0.00
June 4	59	49	0.00
June 5	61	46	0.00
June 6	61	47	0.00
June 7	62	47	0.00
June 8	61	44	0.00
June 9	60	43	0.00
June 10	62	46	0.00
June 11	69	53	0.14
June 12	75	55	0.00
June 13	71	55	0.73
June 14	65	54	0.19
June 15	65	52	0.00
June 16	64	53	0.00
June 17	63	53	0.00
June 18	64	50	0.00
June 19	65	51	0.00
June 20	62	51	0.00
June 21	60	49	0.00
June 22	60	50	0.00
June 23	58	53	0.00
June 24	62	52	0.00
June 25	62	52	0.00
June 26	62	52	0.00
June 27	64	53	0.00
June 28	66	55	0.00
June 29	67	55	0.00
June 30	66	57	0.00

July 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	65	57	0.00
July 2	64	55	0.01
July 3	62	55	0.00
July 4	62	53	0.00
July 5	61	53	0.00
July 6	62	54	0.02
July 7	62	54	0.01
July 8	63	53	0.00
July 9	59	53	0.00
July 10	60	51	0.01
July 11	58	51	0.00
July 12	59	51	0.00
July 13	59	51	0.00
July 14	57	51	0.00
July 15	60	51	0.02
July 16	62	52	0.00
July 17	63	51	0.00
July 18	61	51	0.00
July 19	61	52	0.00
July 20	61	52	0.00
July 21	64	52	0.00
July 22	62	53	0.00
July 23	62	52	0.00
July 24	62	50	0.00
July 25	60	52	0.00
July 26	59	51	0.00
July 27	59	52	0.14
July 28	63	51	0.00
July 29	61	50	0.00
July 30	59	51	0.00
July 31	61	52	0.00

August 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	62	52	0.00
August 2	62	51	0.01
August 3	59	51	0.00
August 4	62	50	0.00
August 5	63	53	0.00
August 6	67	57	0.00
August 7	65	56	0.00
August 8	65	53	0.00
August 9	65	51	0.00
August 10	64	52	0.00
August 11	64	50	0.00
August 12	61	50	0.00
August 13	63	52	0.00
August 14	63	54	0.00
August 15	65	56	0.00
August 16	69	56	0.01
August 17	67	54	0.00
August 18	64	50	0.00
August 19	65	49	0.00
August 20	65	51	0.00
August 21	63	51	0.00
August 22	62	51	0.00
August 23	62	49	0.00
August 24	59	49	0.00
August 25	62	53	0.00
August 26	66	55	0.01
August 27	64	53	0.00
August 28	63	49	0.00
August 29	60	50	0.00
August 30	62	50	0.00
August 31	62	45	0.00

September 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	60	45	0.00
September 2	56	50	0.00
September 3	57	49	0.00
September 4	60	48	0.00
September 5	63	48	0.00
September 6	63	51	0.00
September 7	62	49	0.00
September 8	61	51	0.00
September 9	63	51	0.02
September 10	62	52	0.03
September 11	63	49	0.00
September 12	60	51	0.00
September 13	61	49	0.00
September 14	65	47	0.00
September 15	61	47	0.00
September 16	59	45	0.00
September 17	65	51	0.00
September 18	66	55	0.78
September 19	65	53	0.06
September 20	65	47	0.00
September 21	77	49	0.00
September 22	60	50	0.00
September 23	65	51	0.00
September 24	68	49	0.00
September 25	60	52	0.00
September 26	67	55	0.00
September 27	66	50	0.35
September 28	62	44	0.00
September 29	63	47	0.00
September 30	66	46	0.00

October 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	62	51	0.00
October 2	59	50	0.00
October 3	60	50	0.00
October 4	57	49	0.00
October 5	66	47	0.05
October 6	59	43	0.00
October 7	57	48	0.00
October 8	61	47	0.01
October 9	60	43	0.00
October 10	59	46	0.00
October 11	56	42	0.00
October 12	56	36	0.00
October 13	57	43	0.00
October 14	60	40	0.00
October 15	56	44	0.00
October 16	63	40	0.00
October 17	61	44	0.73
October 18	58	43	0.01
October 19	65	42	0.40
October 20	64	50	0.26
October 21	73	51	0.84
October 22	60	51	0.01
October 23	65	53	0.16
October 24	60	48	1.01
October 25	61	47	0.17
October 26	60	52	0.11
October 27	65	52	0.00
October 28	65	48	0.00
October 29	62	51	0.03
October 30	61	52	0.20
October 31	66	52	0.03

November 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	63	53	0.95
November 2	68	48	0.00
November 3	73	47	0.28
November 4	62	50	0.25
November 5	56	49	0.29
November 6	59	44	0.27
November 7	58	40	0.00
November 8	59	38	0.14
November 9	58	49	0.21
November 10	59	49	0.00
November 11	66	51	0.00
November 12	65	51	0.00
November 13	60	50	0.00
November 14	56	48	0.00
November 15	60	47	0.33
November 16	55	41	0.00
November 17	60	36	0.00
November 18	60	45	0.03
November 19	56	42	0.05
November 20	58	40	0.00
November 21	61	36	0.00
November 22	61	37	0.00
November 23	56	43	0.02
November 24	55	36	0.00
November 25	58	37	0.00
November 26	60	39	0.00
November 27	62	46	0.00
November 28	53	46	0.02
November 29	50	46	0.01
November 30	56	44	0.00

December 2021 Eureka Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	61	42	0.00
December 2	51	48	0.00
December 3	50	45	0.03
December 4	50	47	0.01
December 5	51	47	0.00
December 6	51	44	0.35
December 7	57	47	0.02
December 8	52	48	0.05
December 9	51	37	0.00
December 10	51	33	0.00
December 11	51	41	0.56
December 12	53	46	0.49
December 13	49	39	0.89
December 14	50	34	0.03
December 15	46	40	0.54
December 16	54	38	0.11
December 17	51	34	0.00
December 18	51	35	0.09
December 19	56	45	0.00
December 20	60	52	0.00
December 21	59	46	0.29
December 22	60	45	0.83
December 23	52	43	0.47
December 24	50	41	0.26
December 25	50	37	0.54
December 26	45	35	0.96
December 27	44	36	0.16
December 28	49	37	0.16
December 29	50	34	0.21
December 30	49	34	0.13
December 31	49	33	0.07

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Weather Station Details

Years	Station	Coordinates
1941–2024	Eureka Woodley Island	location