California Weather In December: What To Expect

December in California offers a diverse range of weather conditions, making it a popular destination for travelers seeking both sunshine and winter experiences. Understanding the typical weather patterns can help you plan your trip and pack appropriately. From the sunny beaches of Southern California to the snow-capped mountains of the Sierra Nevada, December in California has something for everyone.

Overview of California's December Weather

California weather in December is characterized by cooler temperatures and increased rainfall, especially in Northern California. While Southern California generally enjoys mild, sunny days, Northern California experiences a more pronounced winter season. This variation allows for a wide array of activities, from surfing and hiking to skiing and snowboarding. The average temperatures fluctuate significantly depending on the region, so it’s essential to consider your destination when planning your trip.

  • Temperature Variations: Temperatures vary widely across the state. Coastal areas in Southern California may see daytime highs in the 60s (°F), while nighttime temperatures can drop into the 40s (°F). In contrast, Northern California and the mountainous regions experience much colder temperatures, often below freezing, especially at night. Inland areas, such as the Central Valley, can have cooler days and colder nights compared to the coast.
  • Rainfall Patterns: December is one of the wettest months in California, particularly in the northern part of the state. The rainfall is crucial for replenishing water supplies but can also lead to occasional flooding and travel disruptions. Southern California receives less rain but still experiences occasional showers. If you're traveling during this time, it's a good idea to check the forecast and be prepared for wet conditions.
  • Regional Differences: The diverse geography of California contributes to significant regional weather differences. The coastal regions have a Mediterranean climate with mild, wet winters and dry summers. The mountains experience a typical alpine climate with heavy snowfall, making them ideal for winter sports. The desert regions, like Death Valley, have mild daytime temperatures in December but can get quite cold at night. Understanding these regional variations is key to planning your trip.

Southern California Weather in December

Southern California in December offers a pleasant escape from colder climates, with mild temperatures and plenty of sunshine. The coastal cities, such as Los Angeles and San Diego, experience daytime highs in the 60s (°F), making it comfortable for outdoor activities. Despite the mild temperatures, it's worth noting that evenings can be cooler, so packing layers is essential. The average rainfall is lower compared to Northern California, but occasional showers can still occur.

  • Los Angeles: Los Angeles in December boasts mild weather, perfect for exploring the city's many attractions. Daytime temperatures hover around the mid-60s (°F), with plenty of sunshine. Rainfall is less frequent than in Northern California, but it’s still advisable to check the forecast. Popular activities include visiting beaches, hiking in the Santa Monica Mountains, and exploring Hollywood. The evenings can be cool, so a light jacket or sweater is recommended.
  • San Diego: San Diego enjoys similar weather to Los Angeles in December, with daytime temperatures in the mid-60s (°F) and abundant sunshine. The city is known for its beautiful beaches, parks, and attractions like Balboa Park and the San Diego Zoo. Rainfall is relatively low, but occasional showers are possible. San Diego's mild weather makes it a great destination for outdoor enthusiasts and families alike. The coastal breeze can make evenings feel cooler, so packing layers is a good idea.
  • Beaches and Outdoor Activities: The beaches of Southern California are still enjoyable in December, although the water may be too cold for swimming for some. Activities like beach walks, sunbathing, and surfing (with a wetsuit) are popular. Hiking trails in the Santa Monica Mountains and other natural areas offer stunning views and opportunities for exercise. Many outdoor events and festivals take place during December, adding to the region's appeal. Remember to wear sunscreen, even on cloudy days, and stay hydrated.

Northern California Weather in December

Northern California in December presents a stark contrast to its southern counterpart, with cooler temperatures and higher rainfall. Cities like San Francisco and Sacramento experience daytime temperatures in the 50s (°F), and nighttime temperatures can drop into the 30s and 40s (°F). The region sees significant rainfall, which is crucial for the state's water supply but can also lead to travel disruptions. The Sierra Nevada mountains receive heavy snowfall, transforming them into a winter wonderland perfect for skiing and snowboarding. Days Until January 14th: Your Countdown Guide

  • San Francisco: San Francisco in December is characterized by cool, damp weather. Daytime temperatures average in the mid-50s (°F), and nighttime temperatures can drop into the 40s (°F). The city experiences frequent rainfall and fog, so it's essential to be prepared for wet conditions. Despite the weather, San Francisco offers a unique charm during the winter months, with festive decorations and holiday events. Popular activities include visiting museums, exploring the Golden Gate Bridge, and enjoying the city's vibrant culinary scene. Layers of clothing are a must, as the weather can change quickly.
  • Sacramento: Sacramento's weather in December is cooler and wetter than Southern California, with daytime temperatures in the low 50s (°F) and nighttime temperatures in the 30s and 40s (°F). The city experiences significant rainfall, so it's advisable to carry an umbrella or raincoat. Despite the weather, Sacramento offers a variety of indoor and outdoor activities, including visiting historical sites, exploring the Old Sacramento Waterfront, and enjoying the city's many parks. The cooler temperatures make it a great time to visit museums and art galleries. Dressing warmly is essential, especially in the evenings.
  • Sierra Nevada and Snowfall: The Sierra Nevada mountains are a major draw for winter sports enthusiasts in December. Heavy snowfall transforms the region into a winter playground, with numerous ski resorts offering world-class skiing and snowboarding opportunities. Lake Tahoe is a popular destination, with its stunning alpine scenery and a variety of winter activities. The snowpack also plays a crucial role in California's water supply, making the winter snowfall vital for the state's overall well-being. If you're planning a trip to the Sierra Nevada, be sure to check road conditions and carry tire chains if necessary.

Weather in Other Regions of California

California's diverse geography results in unique weather patterns in different regions. The Central Valley, the desert regions, and the coastal areas each experience distinct conditions in December. Understanding these regional variations can help you plan your itinerary and pack accordingly.

  • Central Valley: The Central Valley, including cities like Fresno and Bakersfield, experiences cooler temperatures in December compared to the coast. Daytime temperatures average in the 50s (°F), and nighttime temperatures can drop into the 30s and 40s (°F). The region sees moderate rainfall, and occasional fog can occur. The Central Valley is an agricultural hub, and December is a quieter time of year, but there are still opportunities to explore the region's natural beauty and historical sites. Dressing warmly is recommended, especially in the evenings.
  • Desert Regions (Death Valley, Mojave): The desert regions of California, such as Death Valley and the Mojave Desert, offer mild daytime temperatures in December, making it a good time to visit. Daytime highs can reach the 60s and 70s (°F), but nighttime temperatures can drop significantly, sometimes below freezing. Rainfall is minimal, and the skies are generally clear. Death Valley is particularly appealing in December, as the extreme summer heat is replaced by more comfortable conditions. However, it's essential to be prepared for the temperature fluctuations and bring layers of clothing. Hiking and exploring the unique desert landscapes are popular activities.
  • Coastal Regions (Central Coast): The Central Coast of California, including cities like Santa Barbara and Monterey, enjoys a Mediterranean climate with mild, wet winters. Daytime temperatures in December range from the 50s to 60s (°F), and nighttime temperatures can drop into the 40s (°F). The region experiences moderate rainfall, and fog is common along the coast. The Central Coast offers stunning scenery, including rugged cliffs, sandy beaches, and charming coastal towns. December is a quieter time of year, making it ideal for a peaceful getaway. Popular activities include visiting the Monterey Bay Aquarium, exploring the historic missions, and hiking along the coast. Layers of clothing are recommended, as the weather can be unpredictable.

Tips for Planning Your Trip to California in December

Planning a trip to California in December requires considering the diverse weather conditions across the state. By understanding the regional variations and preparing accordingly, you can have an enjoyable and memorable experience. Here are some tips to help you plan your trip:

  • Check the Weather Forecast: Before you travel, check the weather forecast for the specific regions you plan to visit. This will help you pack appropriately and be prepared for any potential weather-related disruptions. Websites like the National Weather Service (https://www.weather.gov/) and AccuWeather (https://www.accuweather.com/) provide detailed forecasts for different areas of California.
  • Pack Layers: Given the temperature variations, packing layers is essential. This allows you to adjust your clothing based on the weather conditions. Include items such as light jackets, sweaters, and waterproof outerwear. If you plan to visit the mountains, pack warm clothing, including hats, gloves, and scarves.
  • Consider Your Destination: Choose your destination based on the activities you enjoy and the weather you prefer. If you're looking for sunshine and mild temperatures, Southern California may be a better choice. If you're interested in winter sports, head to the Sierra Nevada. If you want to experience a mix of urban and outdoor activities, San Francisco or Sacramento might be a good fit.
  • Be Prepared for Rain: December is one of the wettest months in California, especially in the northern part of the state. Bring an umbrella, raincoat, and waterproof shoes. If you're driving, ensure your vehicle is in good condition and equipped for wet weather. Check road conditions before you travel, especially if you're planning to drive in the mountains.
  • Book Accommodations and Activities in Advance: December is a popular time to visit California, especially around the holidays. Booking your accommodations and activities in advance can help you secure the best deals and avoid disappointment. This is particularly important if you're planning to visit popular destinations or attend special events.

Activities and Events in California in December

December in California offers a wide range of activities and events, catering to different interests and preferences. From holiday celebrations to outdoor adventures, there's something for everyone to enjoy. Here are some popular activities and events to consider:

  • Holiday Parades and Festivals: Many cities and towns in California host holiday parades and festivals in December. These events often feature festive decorations, live music, and family-friendly activities. Some notable events include the Hollywood Christmas Parade (https://thehollywoodchristmasparade.org/) and the San Diego Bay Parade of Lights (https://sdparadeoflights.org/). These events are a great way to experience the holiday spirit and enjoy the community atmosphere.
  • Winter Sports in the Sierra Nevada: The Sierra Nevada mountains offer excellent opportunities for winter sports in December. Ski resorts like Squaw Valley, Northstar, and Mammoth Mountain offer world-class skiing and snowboarding. Other winter activities include snowshoeing, cross-country skiing, and ice skating. Lake Tahoe is a popular destination, with its stunning alpine scenery and a variety of winter recreation options. Remember to check snow conditions and road closures before heading to the mountains.
  • Visiting National Parks: California's national parks, such as Yosemite, Death Valley, and Joshua Tree, offer unique experiences in December. Yosemite Valley is particularly beautiful in the winter, with snow-covered landscapes and fewer crowds. Death Valley offers mild daytime temperatures, making it an ideal time to explore this unique desert environment. Joshua Tree National Park is also a great option, with its stunning desert scenery and opportunities for hiking and rock climbing. Check park websites for closures and conditions before your visit.
  • Exploring Coastal Towns: The coastal towns of California offer a charming atmosphere in December, with festive decorations and holiday events. Cities like Santa Barbara, Monterey, and Carmel-by-the-Sea are worth exploring. The beaches are less crowded, and the cooler temperatures make it pleasant for walking and sightseeing. Many coastal towns host holiday markets and festivals, adding to the festive atmosphere. Enjoy the local cuisine and explore the unique shops and galleries.

FAQ about California Weather in December

1. What is the average temperature in California during December?

The average temperature in California in December varies greatly depending on the region. Southern California coastal areas typically experience daytime highs in the 60s (°F), while Northern California and the mountains can see temperatures below freezing, especially at night. Inland areas also tend to be cooler than the coast.

2. How much rainfall can I expect in California in December?

December is one of the wettest months in California, particularly in Northern California. Southern California receives less rain, but occasional showers are still possible. It's always a good idea to check the forecast and pack rain gear if you're traveling during this time of year.

3. Is it a good time to visit Southern California beaches in December?

Yes, Southern California beaches can still be enjoyable in December. The weather is mild, with daytime highs in the 60s (°F), making it comfortable for beach walks and sunbathing. The water may be too cold for swimming for some, but surfing is still possible with a wetsuit. Just remember that evenings can be cooler.

4. What are some popular winter activities in California in December?

Popular winter activities in California include skiing and snowboarding in the Sierra Nevada mountains, visiting national parks like Yosemite and Death Valley, and exploring coastal towns. Many cities also host holiday parades and festivals during December, adding to the festive atmosphere. Last Meal On Earth: What Would You Eat?

5. What should I pack for a trip to California in December?

Packing layers is essential for a trip to California in December, given the temperature variations across the state. Include items such as light jackets, sweaters, and waterproof outerwear. If you plan to visit the mountains, pack warm clothing, including hats, gloves, and scarves. Don't forget an umbrella or raincoat, especially if you're traveling to Northern California.

6. Are there any travel advisories I should be aware of when visiting California in December? Kadarius Toney: Retirement Rumors & NFL Career Analysis

During December, it's important to be aware of potential travel advisories related to weather conditions, especially in Northern California and the Sierra Nevada. Heavy rainfall can cause flooding and road closures, and snowfall can make mountain roads hazardous. Check road conditions and weather forecasts before you travel, and carry tire chains if necessary.

7. What kind of weather can I expect in Death Valley during December?

Death Valley in December offers mild daytime temperatures, making it a good time to visit. Daytime highs can reach the 60s and 70s (°F), but nighttime temperatures can drop significantly, sometimes below freezing. Rainfall is minimal, and the skies are generally clear. It's essential to be prepared for the temperature fluctuations and bring layers of clothing.

8. How does the weather in San Francisco in December compare to Los Angeles?

San Francisco in December is generally cooler and wetter than Los Angeles. San Francisco experiences daytime temperatures in the mid-50s (°F) and frequent rainfall, while Los Angeles enjoys milder weather with daytime highs in the 60s (°F) and less rain. Be prepared for different conditions depending on which city you plan to visit.

December in California presents a diverse tapestry of weather conditions, from the mild, sunny coasts of Southern California to the snow-laden peaks of the Sierra Nevada. By understanding these regional variations and planning accordingly, you can unlock a unique and rewarding California experience. Be sure to check weather forecasts, pack appropriately, and embrace the myriad activities and events that this dynamic state has to offer during the winter months.

Photo of Emma Bower

Emma Bower

Editor, GPonline and GP Business at Haymarket Media Group ·

GPonline provides the latest news to the UK GPs, along with in-depth analysis, opinion, education and careers advice. I also launched and host GPonline successful podcast Talking General Practice