Weather in Tomales Bay, Marin County, United States in December

So you're interested in going to Tomales Bay, Marin County, United States in December

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

Temperature in Tomales Bay in December

The average maximum temperature in Tomales Bay in December is 15°. The average maximum temperature is 18° in the previous month and 16° in the next month.

The average temperature in Tomales Bay in December is . The average temperature ranges is 11° in the previous month and in the next month.

The average minimum temperature in Tomales Bay in December is . The minimum temperature is in the previous month and in the next month.

Sunshine in Tomales Bay in December

The average day light hours per day in Tomales Bay in December are 9.5 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 Tomales Bay in December is typically 2.1 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 Tomales Bay in December

The average sea water temperature in Tomales Bay in December is 15.2° which is cold for swimming, a full wet suit is required to spend any length of time in the sea.

Rainfall in Tomales Bay in December

The average total rainfall in Tomales Bay in December is 12cm and on average there are 8.7 rainy days in December making it a dry time to visit the beach.

Humidity in Tomales Bay in December

The maximum dew point (an indicator of humidity) in Tomales Bay in December is which is a bit dry for some. The dew point is 10° in the previous month and in the next month.

The average maximum relative humidity in Tomales Bay in December is typically 98.6%. The maximum relative humidity is 97.9% in the previous month and 99.6% in the next month.

The average relative humidity in Tomales Bay in December is typically 85.4%. The average relative humidity is 81.7% in the previous month and 81.1% in the next month.

Wind Speed in Tomales Bay in December

The average maximum wind speed in Tomales Bay in December is typically 18kmh. The average maximum wind speed is 19kmh in the previous month and 18kmh in the next month.

The average wind speed in Tomales Bay in December is typically 5kmh. The average wind speed is 6kmh in the previous month and 5kmh in the next month.

The average wind direction in Tomales Bay in December is from the South-Southwest.

Monthly Averages

Suggested Beaches in December

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