Weather in San Francisco, United States in December

So you're interested in going to San Francisco, United States in December

December is a very cold and slightly rainy time for sunbathing in San Francisco, and not recommended. December is too cold for swimming in San Francisco for any length of time, unless you have a wetsuit. Consider visiting San Francisco in the months of June, July, August, September, for the best beach weather. Also consider one of our other suggestions for December.

Temperature in San Francisco in December

The average maximum temperature in San Francisco in December is 14°. The average maximum temperature is 18° in the previous month and 14° in the next month.

The average temperature in San Francisco in December is 11°. The average temperature ranges is 14° in the previous month and 10° in the next month.

The average minimum temperature in San Francisco in December is . The minimum temperature is in the previous month and in the next month.

Sunshine in San Francisco in December

The average day light hours per day in San Francisco in December are 9.6 and there are 5.1 hours of sunshine per day on average during December making it a sunny month that is overcast at times.

The ultraviolet index in San Francisco in December is typically 2.2 during December. An ultraviolet index reading of 0 to 2 indicates low danger from the sun's UV rays for the average person. Most people will be able to spend several hours in the sun with out a problem, however unprotected skin risks burning in less than 1 hour. Wear sunglasses on bright days. Only those that burn easily will need to apply sunscreen. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in San Francisco in December

The average sea water temperature in San Francisco in December is 14.9° which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Rainfall in San Francisco in December

The average total rainfall in San Francisco in December is 37.1cm and on average there are 11.9 rainy days in December making it a slightly wet time to visit the beach.

Humidity in San Francisco in December

The maximum dew point (an indicator of humidity) in San Francisco in December is which is a bit dry for some. The dew point is 11° in the previous month and in the next month.

The average maximum relative humidity in San Francisco in December is typically 90.1%. The maximum relative humidity is 89% in the previous month and 91% in the next month.

The average relative humidity in San Francisco in December is typically 75.2%. The average relative humidity is 72.2% in the previous month and 76.1% in the next month.

Wind Speed in San Francisco in December

The average maximum wind speed in San Francisco in December is typically 28kmh. The average maximum wind speed is 28kmh in the previous month and 26kmh in the next month.

The average wind speed in San Francisco in December is typically 11kmh. The average wind speed is 10kmh in the previous month and 9kmh in the next month.

The average wind direction in San Francisco in December is from the South East.

Monthly Averages

Suggested Beaches in December

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