Half Moon Bay Average Weather by Day

Data and chart of the the average high and low temperature for every day of the year in Half Moon Bay, California, based on NOAA data.

Also see:

What's the hottest day of the year in Half Moon Bay?

On average, August 20 is the hottest day of the year Half Moon Bay, California. From 1991–2020, the average high temperature on August 20 was 66.1 °F and the average low was 53.6 °F.

What's the coldest day of the year in Half Moon Bay?

On average, December 27 is the coldest day of the year Half Moon Bay, California. From 1991–2020, the average high temperature on December 27 was 59.1 °F, and the average low was 42.4 °F.

Average Temperature by Day

Average temperatures from 1991–2020. Daily averages are a mean of the period from 14 days before to 14 days after, inclusive.

Day	Average (°F)
Day	High	Low
January 1	59.2	42.5
January 2	59.2	42.6
January 3	59.2	42.6
January 4	59.3	42.7
January 5	59.4	42.8
January 6	59.4	42.8
January 7	59.4	42.9
January 8	59.4	42.9
January 9	59.4	43.0
January 10	59.4	43.1
January 11	59.5	43.1
January 12	59.5	43.2
January 13	59.6	43.2
January 14	59.6	43.3
January 15	59.7	43.4
January 16	59.8	43.4
January 17	59.8	43.4
January 18	59.9	43.3
January 19	60.0	43.4
January 20	60.1	43.4
January 21	60.2	43.5
January 22	60.2	43.5
January 23	60.3	43.5
January 24	60.3	43.6
January 25	60.3	43.6
January 26	60.4	43.6
January 27	60.4	43.5
January 28	60.5	43.4
January 29	60.5	43.4
January 30	60.6	43.4
January 31	60.6	43.4
February 1	60.6	43.4
February 2	60.6	43.3
February 3	60.5	43.3
February 4	60.5	43.3
February 5	60.4	43.3
February 6	60.4	43.3
February 7	60.4	43.3
February 8	60.4	43.2
February 9	60.3	43.1
February 10	60.3	43.0
February 11	60.3	43.0
February 12	60.2	43.0
February 13	60.1	43.0
February 14	60.1	43.0
February 15	60.1	43.0
February 16	60.1	43.1
February 17	60.0	43.0
February 18	60.0	43.0
February 19	60.0	43.0
February 20	59.9	43.0
February 21	59.9	42.9
February 22	59.9	42.9
February 23	59.9	42.9
February 24	59.9	42.9
February 25	59.9	43.0
February 26	59.9	43.1
February 27	59.9	43.1
February 28	59.9	43.2
March 1	59.9	43.2
March 2	59.9	43.3
March 3	60.0	43.3
March 4	60.0	43.3
March 5	60.1	43.4
March 6	60.2	43.5
March 7	60.2	43.5
March 8	60.2	43.6
March 9	60.2	43.6
March 10	60.3	43.7
March 11	60.3	43.8
March 12	60.3	43.8
March 13	60.4	43.9
March 14	60.4	43.9
March 15	60.5	43.9
March 16	60.5	43.9
March 17	60.6	43.8
March 18	60.6	43.9
March 19	60.7	43.9
March 20	60.6	43.9
March 21	60.7	43.9
March 22	60.7	43.9
March 23	60.7	43.9
March 24	60.7	43.9
March 25	60.7	43.9
March 26	60.7	44.0
March 27	60.6	43.9
March 28	60.6	44.0
March 29	60.6	44.0
March 30	60.6	44.0
March 31	60.6	44.0
April 1	60.6	44.0
April 2	60.6	44.0
April 3	60.6	44.0
April 4	60.6	43.9
April 5	60.6	43.9
April 6	60.7	43.9
April 7	60.8	43.9
April 8	60.8	44.0
April 9	61.0	44.1
April 10	61.0	44.3
April 11	61.1	44.3
April 12	61.1	44.4
April 13	61.1	44.5
April 14	61.1	44.6
April 15	61.2	44.8
April 16	61.2	44.8
April 17	61.2	44.8
April 18	61.3	44.9
April 19	61.4	45.1
April 20	61.5	45.2
April 21	61.5	45.3
April 22	61.6	45.4
April 23	61.6	45.5
April 24	61.6	45.6
April 25	61.7	45.8
April 26	61.7	45.8
April 27	61.7	45.8
April 28	61.7	45.9
April 29	61.7	46.0
April 30	61.7	46.1
May 1	61.8	46.3
May 2	61.8	46.5
May 3	61.9	46.7
May 4	62.0	46.9
May 5	62.0	47.0
May 6	62.0	47.1
May 7	62.1	47.2
May 8	62.0	47.3
May 9	62.1	47.3
May 10	62.1	47.4
May 11	62.1	47.5
May 12	62.2	47.6
May 13	62.2	47.7
May 14	62.2	47.9
May 15	62.2	48.0
May 16	62.1	48.2
May 17	62.1	48.3
May 18	62.1	48.4
May 19	62.1	48.5
May 20	62.2	48.6
May 21	62.2	48.7
May 22	62.3	48.8
May 23	62.3	48.8
May 24	62.3	48.9
May 25	62.4	48.9
May 26	62.5	49.1
May 27	62.7	49.2
May 28	62.8	49.3
May 29	62.8	49.4
May 30	62.8	49.4
May 31	62.9	49.4
June 1	62.9	49.3
June 2	62.9	49.4
June 3	63.0	49.4
June 4	63.0	49.5
June 5	63.1	49.5
June 6	63.2	49.5
June 7	63.2	49.6
June 8	63.2	49.6
June 9	63.3	49.7
June 10	63.4	49.7
June 11	63.5	49.7
June 12	63.5	49.8
June 13	63.6	49.9
June 14	63.7	49.9
June 15	63.8	50.0
June 16	63.9	50.0
June 17	63.9	50.1
June 18	64.0	50.2
June 19	64.0	50.3
June 20	64.1	50.3
June 21	64.1	50.4
June 22	64.1	50.5
June 23	64.2	50.6
June 24	64.2	50.6
June 25	64.2	50.7
June 26	64.2	50.8
June 27	64.2	50.9
June 28	64.3	51.0
June 29	64.4	51.2
June 30	64.4	51.3
July 1	64.4	51.4
July 2	64.5	51.6
July 3	64.5	51.7
July 4	64.5	51.8
July 5	64.6	52.0
July 6	64.7	52.1
July 7	64.7	52.2
July 8	64.8	52.3
July 9	64.9	52.4
July 10	64.9	52.5
July 11	65.0	52.6
July 12	65.0	52.6
July 13	65.0	52.7
July 14	65.0	52.7
July 15	65.0	52.8
July 16	65.0	52.9
July 17	65.0	52.9
July 18	65.1	53.0
July 19	65.1	53.1
July 20	65.1	53.2
July 21	65.2	53.2
July 22	65.2	53.3
July 23	65.2	53.4
July 24	65.3	53.4
July 25	65.3	53.5
July 26	65.3	53.5
July 27	65.3	53.6
July 28	65.3	53.6
July 29	65.4	53.6
July 30	65.4	53.6
July 31	65.4	53.6
August 1	65.5	53.6
August 2	65.5	53.6
August 3	65.5	53.6
August 4	65.5	53.6
August 5	65.5	53.6
August 6	65.5	53.7
August 7	65.5	53.7
August 8	65.5	53.8
August 9	65.6	53.8
August 10	65.6	53.8
August 11	65.6	53.9
August 12	65.7	53.9
August 13	65.7	53.8
August 14	65.8	53.8
August 15	65.8	53.8
August 16	65.9	53.8
August 17	65.9	53.8
August 18	66.0	53.7
August 19	66.1	53.7
August 20	66.1	53.6
August 21	66.2	53.6
August 22	66.2	53.5
August 23	66.2	53.3
August 24	66.3	53.2
August 25	66.3	53.1
August 26	66.3	53.1
August 27	66.3	53.1
August 28	66.4	53.0
August 29	66.4	53.0
August 30	66.4	53.0
August 31	66.4	53.0
September 1	66.4	52.9
September 2	66.4	52.9
September 3	66.4	52.8
September 4	66.5	52.7
September 5	66.5	52.5
September 6	66.5	52.3
September 7	66.5	52.2
September 8	66.5	52.1
September 9	66.5	51.9
September 10	66.5	51.8
September 11	66.6	51.7
September 12	66.5	51.6
September 13	66.6	51.4
September 14	66.6	51.3
September 15	66.6	51.2
September 16	66.5	51.1
September 17	66.5	51.0
September 18	66.5	50.9
September 19	66.5	50.8
September 20	66.5	50.7
September 21	66.5	50.7
September 22	66.4	50.6
September 23	66.5	50.5
September 24	66.5	50.3
September 25	66.5	50.2
September 26	66.5	50.0
September 27	66.4	49.8
September 28	66.5	49.6
September 29	66.5	49.4
September 30	66.6	49.3
October 1	66.7	49.1
October 2	66.7	49.0
October 3	66.8	48.9
October 4	66.7	48.8
October 5	66.6	48.8
October 6	66.6	48.7
October 7	66.5	48.6
October 8	66.5	48.5
October 9	66.6	48.5
October 10	66.6	48.4
October 11	66.6	48.4
October 12	66.6	48.3
October 13	66.6	48.2
October 14	66.6	48.1
October 15	66.6	48.0
October 16	66.4	47.9
October 17	66.3	47.8
October 18	66.4	47.7
October 19	66.3	47.5
October 20	66.3	47.4
October 21	66.2	47.3
October 22	66.1	47.2
October 23	65.9	47.1
October 24	65.9	47.0
October 25	65.8	47.0
October 26	65.7	46.9
October 27	65.5	46.8
October 28	65.3	46.7
October 29	65.1	46.5
October 30	65.0	46.4
October 31	64.8	46.3
November 1	64.6	46.2
November 2	64.6	46.2
November 3	64.5	46.0
November 4	64.4	45.8
November 5	64.4	45.8
November 6	64.2	45.7
November 7	64.0	45.6
November 8	63.9	45.5
November 9	63.7	45.3
November 10	63.5	45.1
November 11	63.3	45.0
November 12	63.2	44.8
November 13	63.0	44.7
November 14	62.9	44.6
November 15	62.7	44.5
November 16	62.5	44.4
November 17	62.4	44.3
November 18	62.2	44.3
November 19	62.1	44.3
November 20	62.0	44.2
November 21	61.9	44.1
November 22	61.8	44.0
November 23	61.7	43.9
November 24	61.6	43.8
November 25	61.6	43.8
November 26	61.5	43.8
November 27	61.3	43.8
November 28	61.2	43.9
November 29	61.1	43.8
November 30	60.9	43.7
December 1	60.8	43.6
December 2	60.7	43.5
December 3	60.6	43.5
December 4	60.5	43.4
December 5	60.4	43.3
December 6	60.3	43.2
December 7	60.2	43.2
December 8	60.1	43.2
December 9	59.9	43.1
December 10	59.9	43.1
December 11	59.8	43.0
December 12	59.8	42.9
December 13	59.8	42.9
December 14	59.7	42.8
December 15	59.6	42.7
December 16	59.5	42.7
December 17	59.4	42.7
December 18	59.4	42.6
December 19	59.3	42.6
December 20	59.3	42.6
December 21	59.2	42.6
December 22	59.2	42.6
December 23	59.2	42.5
December 24	59.1	42.5
December 25	59.1	42.5
December 26	59.1	42.5
December 27	59.1	42.4
December 28	59.1	42.4
December 29	59.1	42.4
December 30	59.2	42.5
December 31	59.2	42.5

Weather Station Details

Years	Station	Coordinates
1939–2024	Half Moon Bay	location