Weather · Half Moon Bay, United States
Half Moon Bay Weather in May
May in Half Moon Bay averages 16°C by day and 9°C at night, with about 21mm of rain. That makes it a reasonable time to visit.
Avg high
16°C
61°F
Avg low
9°C
48°F
Rainfall
21mm
#7 wettest of 12
What to pack
Layers, plus a jacket for mornings and nights. Rain is unlikely to interrupt your plans.
Timing a trip around the weather? A Local Friend in Half Moon Bay builds it around the season for you.