The highest day temperature in December 2023 was 103°F. The lowest night temperature was 50°F. The average values for day and night temperatures during December were 84.2°F и 67.2°F respectivly.

Most of the days in December are sunny but you can also expect cloudy and gloomy days.

Precipitation total in December for San Rafael is 0.7 in.

The average wind speed in December is 9.1 mph. It makes December one of the most windy months of the year for San Rafael.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for San Rafael in December is 10.7 hours.