Los Angeles in December offers a distinct Mediterranean winter experience, balancing mild daytime warmth with crisp evening lows and a higher probability of seasonal rainfall. Daytime highs typically hover near 67°F to 68°F (19°C), while overnight temperatures drop down to an average of 48°F to 49°F (9°C). Unlike the snowy winters found across much of North America, Southern California stays remarkably temperate, though it counts as one of the region's wetter months with historical precipitation averages ranging between two to three inches.
If you're planning a trip or researching local climate trends, understanding how the weather behaves across different parts of the city matters. Coastal zones stay breezy and cooler, inland valleys experience wider temperature swings, and sudden Pacific storms can shift outdoor plans quickly. Let's break down the actual numbers, historical trends, and practical packing strategies you need.
Temperature Averages and Daily Variations
December brings some of the coolest daily averages of the year to Los Angeles, but that definition is relative. While residents bundle up in heavy coats, visitors from colder climates often find the afternoons pleasant enough for light layers.
Daytime Highs vs. Nighttime Lows
- Afternoon Peak: Temperatures usually peak between 1:00 PM and 3:00 PM, reaching an average high of 67°F (19°C). On clear days with strong winter sun, it can feel warmer, occasionally pushing into the low 70s.
- Nighttime Drop: Once the sun sets behind the Pacific or the Santa Monica Mountains, temperatures drop fast. Evening lows settle around 48°F (9°C), requiring a jacket or sweater for outdoor dining or evening walks.
Coastal vs. Inland Microclimates
Geography dictates your daily comfort in Los Angeles. Coastal neighborhoods like Santa Monica or Venice feel the cooling marine layer, keeping daytime temperatures a few degrees lower and breezes brisk. Meanwhile, inland areas like the San Fernando Valley experience a wider diurnal temperature range—warmer in the afternoon sun, but noticeably colder on clear winter nights when radiative cooling takes over. You can track official local forecasts through the National Weather Service Los Angeles. Lonely Planet has provided coverage on this important issue in great detail.
Rainfall Trends and Precipitation Data
December marks the official ramp-up of the Southern California rainy season, though precipitation remains episodic rather than constant.
Monthly Totals and Rain Days
On average, Los Angeles receives roughly 2.5 inches of rain during December, usually spread across 4 to 6 wet days. Instead of all-day drizzle, rain in this region typically arrives in intense, short-lived Pacific frontal systems. You might experience three consecutive weeks of brilliant sunshine followed by a heavy storm that drops an inch of rain in a single afternoon.
Impact of Climate Oscillations
Rainfall totals vary significantly from year to year based on broader oceanic patterns. During El Niño cycles, the southern jet stream often directs stronger storms toward California, resulting in wetter-than-average Decembers. Conversely, La Niña years tend to suppress storm tracks, leaving the month much drier. For broader climate tracking, you can review historical patterns via NOAA's Climate Prediction Center.
Sunshine Hours and Daylight
Even though December is a winter month, Los Angeles still delivers plenty of natural light.
- Daylight Hours: Because of its southern latitude, the city experiences shorter days than northern U.S. cities, with the sun setting around 4:54 PM near the winter solstice.
- Sunshine Duration: The city averages roughly 220 to 260 hours of bright sunshine during the month. Mornings can feature a layer of low coastal stratus clouds or valley fog, but these typically burn off by midday to reveal clear blue skies.
Practical Packing and Travel Tips
Packing for Los Angeles in December requires versatility. Don't rely solely on summer habits, but don't pack heavy winter gear either.
- Layering Is Essential: Bring a mix of t-shirts or long-sleeve tops for the warm afternoon peaks, paired with a reliable fleece, wool coat, or windbreaker for the chilly evenings.
- Footwear and Rain Gear: Pack a compact umbrella or a water-resistant shell jacket. If you plan to hike in Griffith Park or the Santa Monica Mountains, keep in mind that dirt trails can remain muddy for days after a heavy rainstorm.
- Pools and Ocean Swimming: Hotel pools are usually unheated unless explicitly stated, and ocean temperatures drop to around 58°F (14°C), making swimming uncomfortable for most visitors.
Frequently Asked Questions
Does it ever snow in Los Angeles in December?
No, snow at sea level in Los Angeles is practically unheard of. While the surrounding mountains (such as Mount Baldy or the San Gabriel peaks) often receive a dusting of snow visible from the basin, the city proper stays well above freezing.
Is December a good time to visit Los Angeles?
Yes, December is a great time for sightseeing, holiday events, and museum visits. Tourist crowds at major attractions like Universal Studios or the Getty Center are typically smaller than in the summer, and hotel rates can be more favorable outside of the Christmas holiday week.
How cold does it get at night?
Nighttime lows generally bottom out around 48°F (9°C), though areas closer to the foothills or away from urban heat islands can dip a few degrees lower.
Are outdoor activities still possible?
Absolutely. Most days feature comfortable afternoon conditions for walking, exploring neighborhoods, or visiting outdoor markets, provided you check the radar for incoming rain systems.
