Guerneville Weather in December

December in Guerneville averages 14°C (57°F) during the day and 3°C (37°F) at night. It is the wettest month of the year, with 243 mm (9.6 in) of rainfall on average, so waterproof gear is a must.

Rainfall in Guerneville in December

Guerneville is in the rainy season in December, with rain on around 13 days and an average of 243 mm (9.6 in). The rain this month falls heavily when it arrives, so waterproofs are worth keeping handy.

Temperature in Guerneville in December

Daytime highs in Guerneville in December reach 14°C (57°F), with nights around 3°C (37°F). The month of December belongs to the winter season. Conditions are often most pleasant around the middle of the day. With overnight lows of 3°C (37°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. With the most moderate temperatures of the year, December offers a break from extremes.

Sunshine in Guerneville in December

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

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April, May, June, July, August, September and October typically offer the best weather for Guerneville.