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Half Moon Bay May Weather

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

Typical Half Moon Bay May Weather 1991–2020
Average daily high	62.2 °F
Average daily low	48.1 °F
Average monthly precipitation	1.0 inches
Average monthly snow	none
Daily chance of precipitation	23.1%
Daily chance of snow	0%

Half Moon Bay May Weather Records 1939–2024
Highest temperature	82 °F	May 4, 2011
Lowest temperature	33 °F	May 22, 2008
Highest daily low	60 °F	May 17, 1997
Lowest daily high	52 °F	May 1, 1975
Hottest average high temperature	65.7 °F	1992
Coldest average high temperature	56.9 °F	1991
Most daily precipitation	1.3 inches	May 28, 1998
Most monthly precipitation	4.1 inches	1957
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
May 1	61.8	46.3	81	33
May 2	61.8	46.5	78	35
May 3	61.9	46.7	81	35
May 4	62.0	46.9	82	38
May 5	62.0	47.0	77	37
May 6	62.0	47.1	82	36
May 7	62.1	47.2	78	35
May 8	62.0	47.3	74	38
May 9	62.1	47.3	80	37
May 10	62.1	47.4	71	37
May 11	62.1	47.5	74	36
May 12	62.2	47.6	71	37
May 13	62.2	47.7	74	35
May 14	62.2	47.9	75	39
May 15	62.2	48.0	78	37
May 16	62.1	48.2	75	37
May 17	62.1	48.3	79	36
May 18	62.1	48.4	75	35
May 19	62.1	48.5	79	38
May 20	62.2	48.6	68	38
May 21	62.2	48.7	80	38
May 22	62.3	48.8	79	33
May 23	62.3	48.8	78	35
May 24	62.3	48.9	78	40
May 25	62.4	48.9	78	38
May 26	62.5	49.1	78	40
May 27	62.7	49.2	72	40
May 28	62.8	49.3	70	40
May 29	62.8	49.4	70	40
May 30	62.8	49.4	67	39
May 31	62.9	49.4	77	42

Weather Station Details

Years	Station	Coordinates
1939–2024	Half Moon Bay	location