Half-moon Bay Weather & Climate: Best Time to Visit

The weather in Half-moon Bay changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a moderate 17°C (63°F) in February. In July, the coolest month of the year, temperatures drop to a chilly 10°C (50°F).

At night, temperatures range from around 11°C (52°F) in February to 5°C (41°F) in July.

Check out our detailed temperature page for more information.

Temperature ranges by month

Half-moon Bay experiences significant rainfall throughout the year, averaging 1364 mm (54 in) of precipitation annually. Despite minor fluctuations, Half-moon Bay enjoys fairly consistent precipitation throughout the year. In October, you can expect around 134 mm (5.3 in) of precipitation, while in July, Half-moon Bay receives about 96 mm (3.8 in). For more details, please visit our Half-moon Bay Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Half-moon Bay can be enjoyed more throughout the sunniest month of December under a blue sky, with approximately 6.4 hours of sunshine daily. In contrast, the city experiences much darker days in June, with only 2.6 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The city experiences its highest humidity in July, reaching 88%. In November, the humidity drops to its lowest level at 78%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year