Comprehensive Guide To Weather In Los Angeles CA In December 2026

Planning a trip, outdoor event, or seasonal wardrobe update requires a detailed breakdown of the atmospheric patterns, historical averages, and unique meteorological traits characteristic of Southern California during the final month of the year. The weather in Los Angeles CA in December 2026 transitions the region firmly into its winter season, offering a mild yet dynamic climate defined by cooler temperatures, shorter daylight hours, and the potential for Pacific storm systems. Unlike the freezing winters experienced across the northern and eastern United States, Los Angeles maintains a Mediterranean climate that makes it a popular destination for travelers seeking refuge from harsher climates, though locals know to expect variable conditions ranging from crisp, clear mornings to sudden rainfall.

Decoding Temperature Trends and Daily Thermal Ranges

Understanding the thermal profile of Los Angeles in December requires looking beyond simple averages. Daytime highs typically hover around 68 degrees Fahrenheit (20 degrees Celsius), providing comfortable conditions for outdoor exploration without the intense heat of the summer months. However, as soon as the sun dips below the horizon, temperatures drop rapidly, often reaching lows of around 48 degrees Fahrenheit (9 degrees Celsius).

Coastal neighborhoods such as Santa Monica, Venice, and Malibu experience marine moderation, keeping their days slightly cooler and nights marginally warmer due to the thermal mass of the Pacific Ocean. Conversely, inland valleys like the San Fernando Valley (Sherman Oaks, Woodland Hills) and the San Gabriel Valley experience a broader diurnal temperature range. Inland afternoon highs can occasionally reach the low 70s, while nighttime lows regularly dip into the low 40s or even upper 30s during clear, radiative cooling nights.

• Coastal Daytime Average: 65°F to 68°F (18°C to 20°C)
• Inland Daytime Average: 68°F to 72°F (20°C to 22°C)
• Coastal Nighttime Average: 50°F to 53°F (10°C to 12°C)
• Inland Nighttime Average: 42°F to 47°F (5°C to 8°C)

Precipitation Patterns and the Rainy Season Onset

December marks the official ramp-up of the Southern California rainy season, which typically runs from November through March. While Los Angeles is famous for its abundant sunshine, December averages about four to five days of measurable precipitation, accumulating a historical monthly mean of roughly 2.3 inches of rainfall.

Rainfall in Los Angeles is rarely a persistent all-day drizzle. Instead, storms arrive in intense, concentrated bursts driven by atmospheric rivers or cold fronts tracking down from the Gulf of Alaska. Flash flooding can occasionally occur in low-lying urban areas and recent wildfire burn scars in the foothills of the Santa Monica and San Gabriel mountains. Travelers should monitor local forecasts closely for flash flood watches and high surf advisories along the coastline during storm windows.

Sunshine, Daylight Hours, and Atmospheric Clarity

Despite being a winter month, Los Angeles in December still offers a generous amount of solar radiation, averaging around 7 to 8 hours of bright sunshine per day. However, because December contains the winter solstice, daylight hours are at their annual minimum. The sun rises around 6:55 AM and sets approximately at 4:55 PM, giving visitors roughly 10 hours of total daylight.

One of the greatest perks of the winter weather pattern in Southern California is atmospheric clarity. Following a winter storm, winds shift from the north or northeast, sweeping away smog and marine layer clouds. This creates the famous post-storm crystal-clear days where visibility extends for dozens of miles, offering stunning, snow-capped views of the San Gabriel Mountains—including Mount Baldy—directly from the urban basin.

Comparative Climatological Breakdown for December

To put the Los Angeles December climate into perspective, the following table compares key meteorological indicators across different microclimates within the Los Angeles metropolitan area.

Wardrobe and Packing Strategies for Winter in LA

Packing for a December trip to Los Angeles requires a layered approach. First-time visitors often make the mistake of packing exclusively summer attire or, conversely, heavy winter coats suited for Chicago or New York. The key is adaptability.

Essential Packing Guidelines: Layering is Mandatory: Bring lightweight sweaters, cardigans, and long-sleeve shirts for the daytime, supplemented by a medium-weight jacket, fleece, or trench coat for the evenings. Footwear and Rain Gear: Pack a compact travel umbrella or a durable waterproof shell in case a Pacific front moves through. Comfortable walking shoes are essential, but open-toed shoes are generally unnecessary unless you plan on spending time exclusively indoors or on heated patios. Sun Protection: Never abandon sunscreen or sunglasses. The winter sun in Southern California sits lower in the sky, making UV glare potent during daytime hours, especially near reflective surfaces like the ocean or concrete urban environments.

Outdoor Activities and Event Planning Considerations

The mild December climate provides an ideal environment for outdoor recreation without the exhausting heatwaves of July and August. Hiking trails in Griffith Park, Runyon Canyon, and the Santa Monica Mountains are exceptionally pleasant during midday. Surfers continue to populate breaks like Malibu and Manhattan Beach, though donning a 3/2mm or 4/3mm wetsuit is necessary due to ocean water temperatures dropping into the chilly 58°F to 60°F (14°C to 15°C) range.

Holiday events—such as the Marina del Rey Boat Parade, ice skating in Pershing Square, and neighborhood light displays in areas like the historic Candy Cane Lane in Woodland Hills—thrive in the cool evening air. However, event planners and tourists must always maintain a flexible itinerary, keeping indoor backup options ready in the event of an unexpected winter downpour.

Frequently Asked Questions

Is it warm enough to swim in Los Angeles in December?

No, ocean swimming is generally not recommended for casual beachgoers in December unless wearing a thick wetsuit. Ocean water temperatures drop to around 58°F to 60°F, and air temperatures rarely sustain comfortable beach lounging conditions once the wind picks up.

Does it ever snow in Los Angeles in December?

Snow does not fall in the Los Angeles basin or coastal areas. However, light snow frequently accumulates on the peaks of the local San Gabriel Mountains, providing a scenic white backdrop visible from the city below.

How many rainy days should I expect during a week-long trip?

On average, a week-long stay in December will encounter zero to two days of rain, as storms move through in quick, multi-day systems separated by several days of clear, sunny weather.

What should I pack for evening activities in Los Angeles in December?

You should pack warm coats, scarves, and closed-toe shoes for evening outings. Temperatures drop significantly as soon as the sun sets, making heavy jackets necessary for nighttime dining or outdoor holiday events.

Are tourist attractions less crowded in Los Angeles in December?

Major theme parks and tourist destinations experience moderate crowds, peaking specifically around the Christmas and New Year holiday weeks. Early to mid-December generally sees lighter tourist traffic compared to the peak summer season.

Conclusion and Final Travel Recommendation

Navigating the weather in Los Angeles CA in December 2026 relies on embracing the region's dynamic microclimates and seasonal shifts. By packing versatile layers, monitoring local forecasts for passing Pacific storms, and preparing for crisp evening temperatures, visitors can fully enjoy the mild, clear, and vibrant conditions that make Southern California a premier winter getaway. Whether hiking dry mountain ridges or enjoying festive city lights under clear starlit skies, LA in December offers a refreshing balance of winter comfort and Mediterranean sunshine.