ClimateForecastDecemberJanuary >>

Half Moon Bay weather in December (California, United States of America)

Will it be warm or cold in Half Moon Bay this December? Here's what you need to know about the weather for the month.

Temperatures

The month of December in Half Moon Bay typically includes moderate temperatures and high rainfall. Daytime temperatures are expected to be around 15°C, cooling off to about 6°C at night. During December, the city enjoys the most temperate climate of the year.

Precipitation

Half Moon Bay in December usually receives high rainfall, averaging around 144 mm for the month. During the wettest month of the year, an umbrella can be your best friend to stay dry. The climate data from previous years indicates that there are typically about 14 days days of rain.

Average sunshine

The month brings about 160 hours of sunlight, offering a comfortable mix of sun and shade.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit Half Moon Bay. May, June, July, August, September and October generally stand out with the best circumstances. While February, March and December tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Half Moon Bay climate page with graphs.

 

Half Moon Bay, monthly averages in December

Min TemperatureMin Temperature 6°C  
Max TemperatureMax Temperature 15°C  
Water TemperatureWater Temperature 13°C *  
Chance of RainChance of Rain 47%  
PrecipitationPrecipitation 144 mm  
Rainy daysRainy days 14 days  
HumidityHumidity 78% *  
WindspeedWindspeed 11 km/h *  
SunshineSunshine 160 hours *  
Percentage SunshinePercentage Sunshine 54% *  
Data from: San Francisco, the United States of America (17 KM, 10 Miles).

Where to go in the United States of America in December

Find out more about the weather in the United States of America and which places have the best travel conditions in this month.

Map not visible? Whoops sorry! Please refresh the page.
Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

Plan on layering your clothes. Some days or part of the day it will be nice and warm and some moments it can be a bit chilly. Bring a rain jacket in case it rains during your stay. With a water temperature of around 13°C there is no need to bring your swimwear.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming
5/10
Cycling
5/10
Walking
5/10
Camping
3/10
Outdoor sports
9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Half Moon Bay.

Our site offers climate and forecast data for every country in the world. Are you going to the United States of America? On this website you can find historical weather averages for many cities in the United States of America. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.