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.

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Guerneville's climate page.

Guerneville Temperature in December

Min Temperature 3°C (37°F)  

Max Temperature 14°C (57°F)  

Chance of Rain 43%  

Precipitation 243 mm (9.6 in)  

Rainy days 13 days  

Sunshine 160 hours *  

Percentage Sunshine 55% *  

* Data from: Healdsburg, the United States of America (16 KM, 10 Miles).

What to Wear in Guerneville in December

Pack for changing conditions in Guerneville in December. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Guerneville in December

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

5/10

Cycling

5/10

Walking

5/10

Camping

3/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit the United States of America, check out our Guerneville's climate page.

More climate data for Guerneville

Temperature Rainfall Sunshine

See the full Guerneville climate overview or explore weather in the United States of America.