December Weather in San Francisco

clouds-in-december San Fran

December is one of the coldest months of the year in San Francisco. However, if you are visiting here from many other places in the world, you may have a different definition of the word “cold.” As you may have heard, San Francisco has a Mediterranean climate, meaning it doesn’t get very cold in our city. The average high temperature throughout December is about 66 F (19 C), which means that during the day, a sweatshirt or light jacket is all you need to stay warm. The average low temperature, which typically happens late at night and early in the morning, is 46 F (8 C). If you are an early riser or a night owl, you’ll want some extra layers to protect against the weather. The temperature almost never gets below freezing, and the last time it snowed in San Francisco was over 40 years ago.

The Best San Francisco December Activities

As we get closer to the holiday season, you’ll see all different types of decorations in Downtown San Francisco. Read out post on the Best Christmas Activities in San Francisco. So if you’d like to explore the area, we’d recommend taking our Downtown SF walking tour. This tour explores the heart of the city, and takes you right next to Union Square, the highlight of the San Francisco holiday decorations. December also offers some amazing bus tours. With all the holiday light displays around the city, nighttime bus tours can take you to some of the most beautifully lit areas of San Francisco.

What to Wear in San Francisco During December

As we mentioned above, December is one of the colder months of the year. We would recommend bringing a sweatshirt in addition to a light jacket to wear around the city. If we have one of our colder days, when the weather gets into the 40s (below 10 C), it will be helpful to have multiple warm layers. In addition, if you will be walking around the waterfront, such as near the ferry building or around Fisherman’s Wharf on our Fisherman’s Wharf Walking Tour, it may get windy. So you might want to bring a light scarf or earmuffs.

Do I Need an Umbrella in San Francisco in December?

December is typically the rainiest month of the year. On average, the city will receive rain on 11 days out of the month. However, you also should understand what “rain” means out here. If you are from a tropical area when you can get very heavy downpours, you should know that doesn’t happen here. A rainy day could mean only 5 minutes of drizzle during a day, and sunny skies for most of the rest of the day. So, we do recommend that you bring an umbrella to San Francisco. However, make sure it’s a light umbrella that’s easy to carry around and stow away, because you probably won’t need to use it very much!

Other December Activities: Free Museum Days

Every month, many of the museums around San Francisco offer free admission. For December, we have some incredible free days. December 4: Asian Art Museum and the Exploratorium December 6: Contemporary Jewish Museum, Golden Gate Park Conservatory of Flowers, and Legion of Honor Museum December 11: California Academy of Sciences December 13: Golden Gate Park Botanic Gardens