Petaluma Weather in December
December in Petaluma brings moderate temperatures around 14°C (57°F) during the day, dropping to 3°C (37°F) at night, with the most rainfall of the year.
Rainfall in Petaluma in December
With frequent rain showers this month, having an umbrella on hand will keep you dry. Analyzing past climate data, one can expect approximately 12 days of rain, averaging 135 mm (5.3 in). Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.
Temperature in Petaluma in December
In December, Petaluma sees moderate temperatures, with highs of 14°C (57°F). Nights drop to around 3°C (37°F). December marks the winter season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. 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. The temperatures in December are often the mildest compared to the rest of the year.
Sunshine in Petaluma in December
You can expect a moderate amount of sunlight, with approximately 160 hours. This means a pleasant mix of sun and overcast.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Petaluma. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Petaluma's climate page.
Petaluma Temperature in December
Min Temperature
3°C (37°F)
Max Temperature
14°C (57°F)
Chance of Rain
39%
Precipitation
135 mm (5.3 in)
Rainy days
12 days
Sunshine
160 hours *
Percentage Sunshine
55% *
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
perfect weather
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What to Wear in Petaluma in December
Pack for changing conditions in Petaluma 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. Prepare for significant rainfall with proper waterproof clothing and shoes. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.What To Do in Petaluma in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Petaluma's climate page.
See the full Petaluma climate overview or explore weather in the United States of America.
