Half Moon Bay Weather in April

What's the weather like in Half Moon Bay (California) in April 2025?

The climate in Half Moon Bay during April can be summarized as mild and reasonably dry.

April is in the spring in Half Moon Bay and is typically the 6th coldest month of the year. Daytime maximum temperatures average around a cool 17°C (63°F), whilst at night 7°C (45°F) is normal.

Half Moon Bay weather averages (imperial / metric)
Daytime temperature 17.2°C 63°F
Nightly temperature 7.4°C 45.3°F
Average temperature 12.3°C 54.1°F
Daily sunshine 11 hrs
Avg rainfall 48 mm 1.9 ins
Rainy days 6 days
Sea temperature 11.8°C 53.3°F
Humidity 71%
Windspeed 18.7kph 12 mph

On average April is the 6th wettest month of the year in Half Moon Bay with around 48mm 1.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 11 hours of sunshine per day.

April temperatures in Half Moon Bay

Half Moon Bay average temperature in April

April rainfall

Half Moon Bay average rain in April

April hourly sunshine

Half Moon Bay average rain in April

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Half Moon Bay in April 2025.

Other monthly averages

Best places to visit in April

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Half Moon Bay weather stats

Half Moon Bay weather statistics
Hottest month: September 22.5°C 72.5°F
Driest month: July 2mm 0.1ins
Sunniest month: April 11hrs
Coldest month: January 13.4°C 56.1°F
Wettest month: January 146mm 5.7ins
Map showing location of Half Moon Bay (37.46355, -122.42859) Half Moon Bay map pin © Google

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