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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
Half Moon Bay January Weather Records
1939–2022
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 temperature 5.2 °F
above average
2003
Coldest average temperature -8.6 °F
below average
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)
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
1939–2022 Half Moon Bay location