Santa Rosa Weather in December

December in Santa Rosa typically sees daytime highs of 30°C (86°F) and nighttime lows of 16°C (61°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Santa Rosa in December

This month experiences about 9 days of rain according to historical data, averaging 86 mm (3.4 in). When it rains this month, it tends to come down fairly heavily. Showers can be substantial even if they don't last all day.

Temperature in Santa Rosa in December

Temperatures in Santa Rosa in December top out at 30°C (86°F) and drop to 16°C (61°F) overnight. The hottest part of the day is usually in the afternoon, so lighter clothing can help you stay comfortable. With lows of 16°C (61°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Santa Rosa in December

Expect sunny days throughout the month, with an estimated 299 hours of sunshine. This makes it a pleasant time to visit Santa Rosa.

Wind Speed in Santa Rosa in December

December sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.

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