San Francisco Weather in December

In San Francisco, December brings pleasant daytime temperatures around 22°C (72°F), with nights cooling to 13°C (55°F). This month falls within the rainy season, so expect frequent rainfall.

Rainfall in San Francisco in December

As part of the rainy season, San Francisco sees around 13 days of rain in December, with an average of 228 mm (9 in). Rain during the rainy season here tends to be intense rather than just persistent drizzle. Expect significant downpours.

Temperature in San Francisco in December

Daytime temperatures in San Francisco reach 22°C (72°F) in December, dropping to 13°C (55°F) at night. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights cool down to 13°C (55°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in San Francisco in December

You can expect a moderate amount of sunlight, with approximately 138 hours. Even though this month is part of the wet season, you can still see the sun occasionally.

If you prefer enjoying temperate temperatures and rain-free days, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.