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Half Moon Bay January Weather

Averages and records for weather in Half Moon Bay, California in the month of January.

Typical Half Moon Bay January Weather 1991–2020
Average daily high	59.6 °F
Average daily low	43.2 °F
Average monthly precipitation	5.0 inches
Average monthly snow	none
Daily chance of precipitation	46.3%
Daily chance of snow	0%

Half Moon Bay January Weather Records 1939–2024
Highest temperature	76 °F	January 16, 2014
Lowest temperature	27 °F	January 18, 2007
Highest daily low	61 °F	January 13, 2009
Lowest daily high	40 °F	January 10, 1949
Hottest average high temperature	64.7 °F	2015
Coldest average high temperature	51.4 °F	1949
Most daily precipitation	5.3 inches	January 4, 1982
Most monthly precipitation	12.1 inches	1998
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
January 1	59.2	42.5	69	32
January 2	59.2	42.6	69	31
January 3	59.2	42.6	69	31
January 4	59.3	42.7	71	28
January 5	59.4	42.8	69	29
January 6	59.4	42.8	69	31
January 7	59.4	42.9	72	33
January 8	59.4	42.9	73	31
January 9	59.4	43.0	71	33
January 10	59.4	43.1	74	29
January 11	59.5	43.1	69	27
January 12	59.5	43.2	73	28
January 13	59.6	43.2	74	28
January 14	59.6	43.3	76	27
January 15	59.7	43.4	75	29
January 16	59.8	43.4	76	28
January 17	59.8	43.4	75	28
January 18	59.9	43.3	74	27
January 19	60.0	43.4	75	30
January 20	60.1	43.4	72	28
January 21	60.2	43.5	72	30
January 22	60.2	43.5	73	32
January 23	60.3	43.5	76	30
January 24	60.3	43.6	73	31
January 25	60.3	43.6	71	28
January 26	60.4	43.6	71	32
January 27	60.4	43.5	71	31
January 28	60.5	43.4	71	31
January 29	60.5	43.4	71	31
January 30	60.6	43.4	72	30
January 31	60.6	43.4	72	29

Weather Station Details

Years	Station	Coordinates
1939–2024	Half Moon Bay	location