Santa Rosa Weather in December

December in Santa Rosa sees daytime temperatures around 31°C (88°F) and lows of 19°C (66°F) at night. With around 135 mm (5.3 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Santa Rosa in December

Typically around 8 days of rainfall are expected, averaging 135 mm (5.3 in) for the month. 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

December in Santa Rosa brings very high temperatures, with highs of 31°C (88°F) and nights around 19°C (66°F). Sunshine and humidity can make it feel even warmer than the raw temperature suggests. With overnight lows of 19°C (66°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.

Sunshine in Santa Rosa in December

With approximately 243 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

December in Santa Rosa can still be great, but if you prefer pleasant temperatures along with dry and sunny conditions, our weather planner can help you explore other options in the world.