december weather southern california

3 min read 07-03-2025

Meta Description: Planning a Southern California getaway in December? Discover what to expect from the weather: sunny skies, mild temperatures, and occasional rain. Pack layers for comfortable exploration of beaches, theme parks, and deserts! Learn about regional variations and prepare for your perfect December escape to Southern California.

What's the Weather Like in Southern California in December?

Southern California in December offers a welcome respite from the cold and snow blanketing much of the country. Expect predominantly sunny skies and mild temperatures, making it an ideal time for outdoor activities. While the weather is generally pleasant, there are some regional variations and occasional surprises.

Average Temperatures in December

Coastal Areas (Los Angeles, San Diego): Highs typically range from the mid-60s to low 70s Fahrenheit (18-21°C), while lows hover in the 50s (10-15°C). Ocean breezes keep temperatures comfortable even on sunny days.
Inland Areas (Inland Empire, Coachella Valley): Inland areas experience warmer days, with highs reaching the 70s and even low 80s (21-27°C). However, nights can get significantly cooler, dipping into the 40s (4-8°C) or even lower in the deserts.
Mountain Areas (Big Bear, Lake Arrowhead): Expect much cooler temperatures in the mountains, with highs in the 40s and 50s (4-15°C) and potential for snow at higher elevations.

Rainfall in December

While December is generally a dry month in Southern California, rain is not unheard of. Occasional showers or even a few days of heavier rain are possible. The amount of rainfall varies greatly from year to year and across different regions. Coastal areas typically receive more rain than inland locations.

What to Pack for a December Trip to Southern California

What you pack will depend on where you're going and what you'll be doing. However, layering is key:

Lightweight Layers: T-shirts, long-sleeved shirts, sweaters, and light jackets are essential. Even on sunny days, evenings can get cool, particularly inland.
Warm Layers: If you plan on visiting mountain areas or spending time outdoors at night, pack a warmer jacket, hat, and gloves.
Waterproof Jacket: Pack a lightweight, waterproof jacket to deal with potential rain showers.
Comfortable Shoes: You'll likely be doing a lot of walking, so comfortable shoes are a must.
Sunscreen and Sunglasses: Even in December, the Southern California sun can be strong.

Regional Variations: Exploring Different Parts of Southern California

Southern California's diverse geography leads to significant variations in December weather. Let's look at some specific regions:

Los Angeles

Los Angeles in December offers pleasant daytime temperatures perfect for exploring beaches like Santa Monica and Venice. Evenings are cooler, ideal for enjoying the city's vibrant nightlife or a cozy dinner.

San Diego

San Diego boasts milder temperatures than Los Angeles, making it a great destination for outdoor activities throughout December. Explore Balboa Park, stroll along the La Jolla Cove, or relax on Coronado Beach.

Palm Springs & the Coachella Valley

The desert regions, such as Palm Springs and the Coachella Valley, experience warm sunny days but significantly cooler nights. This is a good time to visit for hiking and exploring national parks, but pack layers for those chilly desert evenings.

Big Bear & Lake Arrowhead

These mountain areas offer a completely different experience. Expect cooler temperatures and the potential for snow, making it perfect for winter sports enthusiasts.

Planning Your December Trip: Key Considerations

Check the forecast: Before you go, check the specific forecast for your destination. Weather conditions can change rapidly.
Book accommodations in advance: December is a popular travel time, especially during the holiday season.
Pack for all types of weather: While generally mild, the weather in Southern California can be unpredictable. Layers are your best friend!

December Events in Southern California

December in Southern California is alive with holiday cheer. From dazzling light displays to festive events, you'll find plenty to keep you entertained:

Holiday Boat Parades: Many coastal cities host dazzling boat parades with elaborately decorated vessels.
Christmas Tree Lightings: Many towns and cities hold special events to celebrate the lighting of their Christmas trees.
Holiday Markets: Explore festive markets offering unique gifts, crafts, and delicious food.

Enjoy your Southern California adventure in December! Remember to check the specific forecast closer to your travel dates for the most accurate information. With its blend of sunshine, mild temperatures, and festive cheer, Southern California in December is a truly magical experience.