Half Moon Bay Weather in 2018

Historical record of Half Moon Bay, California weather for the year 2018 based on NOAA data.

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2018 Half Moon Bay Weather Extremes
Highest temperature	80 °F	November 1
Lowest temperature	28 °F	February 24
Highest daily low	59 °F	October 4
Lowest daily high	52 °F	February 20
Most daily precipitation	2.0 inches	January 9
Total annual precipitation	18.8 inches	-

What was the hottest temperature in Half Moon Bay in 2018?

The highest temperature recorded in Half Moon Bay, California in 2018 was 80 °F which happened 2 different times.

Highest Temperatures: All-Time By Year

Highest Temperatures in Half Moon Bay in 2018

Rank	Temperature	Date
1	80 °F	Nov 1
1	80 °F	Oct 12
3	78 °F	Feb 4
4	77 °F	Oct 2
4	77 °F	Feb 3
6	76 °F	Oct 15
6	76 °F	Feb 5
8	75 °F	Feb 2
9	74 °F	Mar 29
9	74 °F	Mar 13
9	74 °F	Feb 1

What was the coldest temperature in Half Moon Bay in 2018?

The lowest temperature recorded in Half Moon Bay, California in 2018 was 28 °F which happened 2 different times.

Lowest Temperatures: All-Time By Year

Lowest Temperatures in Half Moon Bay in 2018

Rank	Temperature	Date
1	28 °F	February 24
1	28 °F	February 20
3	30 °F	February 23
4	31 °F	February 16
5	32 °F	November 10
5	32 °F	February 28
5	32 °F	February 25
8	33 °F	March 4
9	34 °F	December 29
9	34 °F	November 15
9	34 °F	March 18
9	34 °F	February 18
9	34 °F	February 17
9	34 °F	February 11
9	34 °F	January 21

January 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
January 1	65	41	0.00
January 2	65	42	0.00
January 3	64	55	0.01
January 4	64	54	0.19
January 5	61	55	0.34
January 6	58	44	0.22
January 7	56	40	0.01
January 8	60	50	1.64
January 9	60	55	2.00
January 10	57	51	0.05
January 11	58	49	0.02
January 12	63	44	0.01
January 13	66	44	0.00
January 14	65	53	0.00
January 15	62	45	0.00
January 16	60	55	0.03
January 17	59	49	0.00
January 18	59	48	0.13
January 19	56	42	0.30
January 20	55	39	0.00
January 21	57	34	0.00
January 22	58	49	0.25
January 23	58	41	0.00
January 24	56	37	0.14
January 25	56	40	0.52
January 26	56	36	0.04
January 27	63	38	0.01
January 28	68	44	0.00
January 29	68	53	0.00
January 30	70	47	0.00
January 31	70	39	0.00

February 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
February 1	74	38	0.00
February 2	75	42	0.00
February 3	77	41	0.00
February 4	78	52	0.00
February 5	76	45	0.00
February 6	73	46	0.00
February 7	73	41	0.00
February 8	63	38	0.00
February 9	66	40	0.00
February 10	64	40	0.00
February 11	60	34	0.00
February 12	56	48	0.00
February 13	64	35	0.00
February 14	62	36	0.00
February 15	62	38	0.00
February 16	58	31	0.00
February 17	58	34	0.00
February 18	58	34	0.01
February 19	55	41	0.00
February 20	52	28	0.00
February 21	54	35	0.00
February 22	54	37	0.01
February 23	54	30	0.00
February 24	54	28	0.00
February 25	55	32	0.00
February 26	54	43	0.33
February 27	54	37	0.03
February 28	55	32	0.00

March 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
March 1	56	50	1.00
March 2	56	40	0.18
March 3	53	37	0.20
March 4	54	33	0.01
March 5	63	37	0.00
March 6	64	49	0.00
March 7	62	45	0.00
March 8	62	52	0.20
March 9	58	45	0.01
March 10	55	49	0.00
March 11	55	43	0.01
March 12	62	47	0.00
March 13	74	53	0.52
March 14	58	45	0.18
March 15	57	38	0.02
March 16	58	48	0.38
March 17	55	41	0.05
March 18	55	34	0.00
March 19	65	38	0.00
March 20	61	50	0.14
March 21	61	53	0.41
March 22	61	51	0.73
March 23	57	37	0.00
March 24	58	45	0.15
March 25	56	37	0.08
March 26	58	36	0.00
March 27	62	38	0.00
March 28	64	40	0.00
March 29	74	42	0.00
March 30	72	43	0.00
March 31	66	42	0.00

April 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
April 1	60	45	0.00
April 2	60	51	0.00
April 3	60	40	0.00
April 4	59	45	0.00
April 5	59	46	0.00
April 6	61	54	0.81
April 7	61	56	1.43
April 8	62	45	0.01
April 9	70	44	0.00
April 10	65	45	0.00
April 11	65	42	0.00
April 12	60	42	0.18
April 13	61	39	0.00
April 14	61	41	0.00
April 15	62	42	0.00
April 16	60	41	0.25
April 17	59	38	0.00
April 18	58	39	0.00
April 19	58	38	0.00
April 20	58	45	0.00
April 21	60	42	0.00
April 22	61	44	0.00
April 23	60	41	0.00
April 24	59	45	0.00
April 25	58	51	0.00
April 26	59	51	0.00
April 27	63	51	0.00
April 28	62	52	0.00
April 29	63	52	0.01
April 30	60	52	0.00

May 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
May 1	58	41	0.00
May 2	60	49	0.00
May 3	59	51	0.00
May 4	59	47	0.00
May 5	59	46	0.00
May 6	60	48	0.00
May 7	61	44	0.00
May 8	61	52	0.00
May 9	61	54	0.06
May 10	61	52	0.00
May 11	66	47	0.00
May 12	67	45	0.00
May 13	64	53	0.00
May 14	64	47	0.00
May 15	64	53	0.00
May 16	63	49	0.00
May 17	62	52	0.00
May 18	60	53	0.01
May 19	58	53	0.00
May 20	60	52	0.00
May 21	59	51	0.00
May 22	59	52	0.04
May 23	60	52	0.05
May 24	60	52	0.00
May 25	62	53	0.04
May 26	60	53	0.02
May 27	61	50	0.01
May 28	64	46	0.00
May 29	65	47	0.00
May 30	63	52	0.00
May 31	60	52	0.00

June 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
June 1	63	43	0.00
June 2	64	42	0.00
June 3	62	45	0.00
June 4	63	45	0.00
June 5	62	51	0.00
June 6	62	52	0.00
June 7	63	52	0.00
June 8	62	47	0.00
June 9	62	54	0.09
June 10	61	43	0.00
June 11	62	53	0.00
June 12	62	45	0.00
June 13	63	45	0.00
June 14	63	53	0.00
June 15	62	50	0.00
June 16	63	53	0.00
June 17	65	53	0.00
June 18	64	56	0.00
June 19	62	53	0.00
June 20	62	53	0.00
June 21	62	52	0.00
June 22	64	51	0.00
June 23	64	46	0.00
June 24	68	52	0.00
June 25	67	55	0.01
June 26	64	45	0.00
June 27	63	54	0.00
June 28	63	49	0.00
June 29	63	51	0.00
June 30	65	46	0.00

July 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
July 1	65	55	0.00
July 2	63	56	0.00
July 3	67	54	0.01
July 4	67	55	0.00
July 5	65	53	0.00
July 6	68	54	0.00
July 7	69	49	0.00
July 8	65	54	0.00
July 9	65	48	0.00
July 10	67	48	0.00
July 11	65	56	0.00
July 12	65	55	0.00
July 13	66	58	0.00
July 14	66	56	0.00
July 15	65	55	0.03
July 16	65	56	0.00
July 17	64	54	0.00
July 18	64	53	0.00
July 19	65	54	0.02
July 20	67	54	0.00
July 21	67	59	0.00
July 22	67	58	0.00
July 23	68	57	0.00
July 24	65	56	0.00
July 25	65	56	0.00
July 26	64	56	0.00
July 27	63	45	0.00
July 28	63	53	0.00
July 29	63	53	0.00
July 30	61	53	0.00
July 31	61	53	0.00

August 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
August 1	61	52	0.01
August 2	61	53	0.01
August 3	62	54	0.00
August 4	62	45	0.00
August 5	63	53	0.00
August 6	62	52	0.00
August 7	61	53	0.00
August 8	62	54	0.00
August 9	59	52	0.00
August 10	61	53	0.00
August 11	64	49	0.00
August 12	65	55	0.00
August 13	64	55	0.00
August 14	64	55	0.04
August 15	66	59	0.01
August 16	67	58	0.00
August 17	66	56	0.00
August 18	62	50	0.00
August 19	63	51	0.00
August 20	63	55	0.00
August 21	64	55	0.00
August 22	67	58	0.00
August 23	66	58	0.00
August 24	68	58	0.00
August 25	68	55	0.00
August 26	65	54	0.00
August 27	66	55	0.00
August 28	67	57	0.03
August 29	69	55	0.00
August 30	69	59	0.00
August 31	65	56	0.00

September 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
September 1	64	56	0.00
September 2	63	55	0.00
September 3	65	55	0.00
September 4	65	56	0.00
September 5	64	56	0.00
September 6	62	55	0.00
September 7	62	53	0.00
September 8	63	46	0.00
September 9	64	51	0.00
September 10	65	53	0.00
September 11	65	44	0.01
September 12	64	50	0.00
September 13	64	55	0.00
September 14	64	55	0.00
September 15	62	55	0.00
September 16	63	54	0.00
September 17	64	47	0.01
September 18	62	55	0.00
September 19	62	51	0.00
September 20	63	42	0.00
September 21	63	43	0.00
September 22	62	50	0.00
September 23	61	50	0.00
September 24	60	40	0.00
September 25	60	47	0.00
September 26	59	51	0.01
September 27	60	51	0.00
September 28	65	56	0.00
September 29	68	52	0.00
September 30	66	52	0.00

October 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
October 1	67	52	0.00
October 2	77	59	0.10
October 3	71	59	0.00
October 4	71	59	0.00
October 5	65	50	0.00
October 6	67	55	0.00
October 7	73	52	0.00
October 8	67	46	0.00
October 9	65	50	0.00
October 10	65	50	0.01
October 11	65	49	0.00
October 12	80	45	0.00
October 13	73	42	0.00
October 14	61	53	0.00
October 15	76	46	0.00
October 16	65	38	0.00
October 17	60	51	0.00
October 18	61	50	0.00
October 19	62	42	0.00
October 20	62	46	0.00
October 21	61	48	0.00
October 22	61	52	0.00
October 23	63	47	0.00
October 24	64	43	0.00
October 25	63	51	0.00
October 26	63	45	0.00
October 27	67	51	0.00
October 28	67	51	0.00
October 29	64	45	0.00
October 30	64	38	0.00
October 31	64	40	0.00

November 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
November 1	80	45	0.00
November 2	66	44	0.00
November 3	64	41	0.00
November 4	63	43	0.00
November 5	63	40	0.00
November 6	61	36	0.00
November 7	61	35	0.00
November 8	63	38	0.00
November 9	72	38	0.00
November 10	60	32	0.00
November 11	70	37	0.00
November 12	72	48	0.00
November 13	65	39	0.00
November 14	61	42	0.00
November 15	61	34	0.00
November 16	62	40	0.00
November 17	61	35	0.00
November 18	61	35	0.00
November 19	66	37	0.00
November 20	63	38	0.00
November 21	62	47	1.22
November 22	62	49	0.18
November 23	61	51	0.66
November 24	61	57	0.17
November 25	62	44	0.01
November 26	63	43	0.00
November 27	62	47	0.01
November 28	63	58	0.10
November 29	62	54	0.82
November 30	60	54	0.03

December 2018 Half Moon Bay Weather

Day	High (°F)	Low (°F)	Precip. (inches)
December 1	58	42	0.07
December 2	59	37	0.02
December 3	57	46	0.00
December 4	57	50	0.00
December 5	56	48	0.40
December 6	62	51	0.05
December 7	62	41	0.00
December 8	63	41	0.00
December 9	62	41	0.00
December 10	58	45	0.00
December 11	59	37	0.00
December 12	63	49	0.00
December 13	64	37	0.00
December 14	64	43	0.06
December 15	62	49	0.05
December 16	62	51	0.14
December 17	60	45	0.40
December 18	60	41	0.01
December 19	61	45	0.00
December 20	60	46	0.00
December 21	60	51	0.10
December 22	61	46	0.00
December 23	62	43	0.00
December 24	60	48	0.30
December 25	59	41	0.09
December 26	58	37	0.00
December 27	60	40	0.00
December 28	60	47	0.00
December 29	58	34	0.00
December 30	60	41	0.00
December 31	57	38	0.00

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Weather Station Details

Years	Station	Coordinates
1939–2024	Half Moon Bay	location