When you picture Los Angeles in winter, you're likely imagining palm trees swaying against a backdrop of endless blue skies and warm afternoon sun. Travelers frequently hunt for a last-minute warm-weather escape, assuming Southern California serves up permanent sunshine year-round. December tells a more nuanced story. It's neither a blistering tropical haven nor a frozen tundra, but a distinct Mediterranean winter balancing bright, crisp days with sudden coastal chill and occasional rain.
Daytime highs typically hover around 68°F (20°C), making outdoor exploration comfortable, but the moment the sun dips behind the Pacific, temperatures drop rapidly to an average low of 48°F (9°C). You'll experience plenty of T-shirt weather during peak afternoon hours, but shorts and sandals won't cut it after dark. Understanding how the microclimates shift across the basin helps you pack right and avoid winter travel surprises.
The Reality of Southern California Winter Temperatures
The concept of a winter chill in Los Angeles is relative, but locals take it seriously. While northern regions and mountain zones deal with heavy frost, the coastal basin stays mild. However, a stark contrast exists between mid-afternoon warmth and evening drops.
- Afternoon Peaks: Half of all December days reach 66°F (19°C) or higher, and rare warm spells can nudge temperatures past 75°F (24°C) under clear skies.
- Nighttime Lows: Inland valleys and canyon areas often see temperatures plunge toward 40°F (4°C), while coastal zones stay slightly buffered by the ocean.
- The Sun Factor: Because the winter sun sits lower on the horizon, shaded streets feel noticeably cooler than sunlit avenues just feet away.
You won't need a heavy parka, but a reliable jacket is mandatory once evening arrives. The transition happens quickly once the golden hour fades. Lonely Planet has analyzed this critical topic in great detail.
Rainfall and Coastal Marine Layers
Winter is officially the rainy season in Southern California, though "rainy" means something entirely different here compared to the Pacific Northwest or the tropics. Los Angeles averages about five to six wet days during the entire month of December.
When storms do roll in from the Pacific, they can drop significant moisture in a short window, occasionally causing urban street flooding or mountain snow in the nearby San Gabriel Mountains. Yet, a completely washed-out week is uncommon. More frequently, you'll encounter the classic morning marine layer—a dense coastal fog that rolls in overnight and burns off by noon, giving way to brilliant afternoon sunshine.
Can You Swim in Los Angeles in December?
For travelers hoping for a beach holiday, the Pacific Ocean delivers a reality check. The sea temperature in December drops to roughly 62°F (17°C).
- Water Sports: Surfers and open-water swimmers wear thick wetsuits (typically 3/2mm or thicker) to stay comfortable for more than a few minutes.
- Casual Wading: Wading along Santa Monica or Malibu beach is refreshing, but extended swimming is strictly for the brave or well-prepared.
- Alternative Activities: Coastal walks, tide pooling, and watching winter sunsets remain world-class even if you leave the swimwear packed away.
Smart Packing Strategies for a December Trip
Packing for Los Angeles in December requires a modular approach. Because indoor spaces rely heavily on standard heating and outdoor temperatures swing dramatically between sun and shade, layers are your best strategy.
- Base Layers: Pack breathable shirts and light sweaters for comfortable daytime exploring.
- Outerwear: Bring a wind-resistant jacket or a medium-weight fleece for breezy nights near the Santa Monica Pier or Griffith Observatory.
- Footwear: Comfortable walking shoes work best, along with a waterproof option if a winter storm system hits during your stay.
- Sun Protection: Don't skip sunglasses and sunscreen; UV rays remain strong even on cooler winter days.
Check out current forecasts via the National Weather Service Los Angeles before you board your flight to monitor incoming Pacific fronts.
Frequently Asked Questions
Does it snow in Los Angeles in December?
Snow in the actual city basin or coastal areas is virtually unheard of. However, the nearby mountain resorts like Mount Baldy and Wrightwood frequently receive snow, offering a snowy alpine landscape just an hour's drive from the beach.
Are tourist attractions crowded during December?
The weeks surrounding Christmas and New Year bring a surge of holiday travelers, leading to busier theme parks like Universal Studios Hollywood and heavier traffic on major freeways. Early December and mid-month periods tend to be much quieter.
Is December a good time for outdoor hiking?
December is widely considered one of the absolute best months for hiking in Southern California. The oppressive summer heat is gone, trails are clear, and visibility after a winter rainstorm offers sweeping views from the Hollywood Hills to the ocean.
How short are the daylight hours?
December brings the winter solstice, meaning sunset occurs early—usually around 4:45 PM. Plan outdoor sightseeing and hikes for the morning and early afternoon to make the most of the daylight.
