San Anselmo Weather in December

December in San Anselmo typically sees daytime highs of 13°C (55°F) and nighttime lows of 5°C (41°F). As the wettest month of the year, expect more rainfall than other months. It falls within the winter season.

Rainfall in San Anselmo in December

Expect frequent, heavy rain this month, marking the peak rainfall period. A poncho will help protect you from getting soaked. Typically around 13 days of rainfall are expected, averaging 187 mm (7.4 in) for the month. Individual showers can be quite heavy this month. A proper umbrella or rain jacket is worth having.

Temperature in San Anselmo in December

Temperatures in San Anselmo in December top out at 13°C (55°F) and drop to 5°C (41°F) overnight. December is in the winter season. Conditions are often most pleasant around the middle of the day. With overnight lows of 5°C (41°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. The temperatures in December are often the mildest compared to the rest of the year.

Sunshine in San Anselmo in December

The area enjoys a balanced 160 hours of sunlight, ensuring it's neither too overcast nor too sunny.

If you're looking for dry conditions and comfortable temperatures, December may not be the ideal month to visit San Anselmo. Our weather planner can help you explore destinations with more pleasant weather conditions.