In December, San Diego, CA enjoys mild weather. Average high temperatures are 66°F (19°C), and average low temperatures are 50°F (10°C). Daytime temperatures are pleasant, with about 8 hours of sunshine each day. Expect significant cloud coverage, making San Diego an appealing retreat from colder winter regions.
Visitors can enjoy outdoor activities without the intense heat of summer. December is one of the less crowded months, providing a more relaxed experience at popular attractions. The comfortable weather encourages exploration of beaches, parks, and cultural sites.
The best times to visit San Diego in December include the beginning and middle of the month. These periods usually feature less rainfall and more favorable weather conditions than later in the month. Specific events, like the San Diego Bay Parade of Lights, add to the festive atmosphere, showcasing holiday spirit and vibrant displays.
As the month progresses, tourists can expect the holiday season to bring unique experiences. Exploring local events and seasonal attractions enhances the charm of December in San Diego.
What Is the December Weather Like in San Diego, CA?
December weather in San Diego, CA, is characterized by mild temperatures and moderate rainfall. The average temperature ranges from 47°F (8°C) at night to 65°F (18°C) during the day. Rainfall during this month averages around 2.06 inches (52.4 mm).
According to the National Oceanic and Atmospheric Administration (NOAA), San Diego experiences a Mediterranean climate. This climate type is marked by warm, dry summers and mild, wet winters. The coastal location contributes to the city’s moderate temperatures throughout the year.
In December, weather conditions typically include sunny to partly cloudy days. Rain can occur, especially in late December, but an abundance of sunny days is still common. Humidity levels moderate the feel of the cold, making the weather quite pleasant.
The Western Regional Climate Center further emphasizes that December’s rain averages are influenced by seasonal shifts in pressure patterns. These shifts lead to winter storms that can affect Southern California.
Main contributing factors include Pacific Ocean currents and the local maritime climate. Ocean temperatures and coastal breezes play significant roles in moderating San Diego’s temperatures.
Historical data shows that the city averages about 5.5 days of rain in December. The San Diego Climate Reference Network highlights that temperatures can fluctuate, but significant snowfall is extremely rare.
The pleasant weather encourages outdoor activities. It benefits tourism, which is vital for the local economy, yet increased rainfall can cause minor flooding.
Examples of outdoor events during December include holiday festivals and beach walks, optimizing tourism potential.
To prepare for potential weather fluctuations, the National Weather Service advises layering clothing. Tourists can stay updated with local forecasts for rain predictions to make the most of their visits.
What Are the Average High and Low Temperatures in December in San Diego, CA?
The average high temperature in December in San Diego, CA, is around 18°C (64°F), while the average low temperature is approximately 9°C (48°F).
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Average High and Low Temperatures:
– Average high: 18°C (64°F)
– Average low: 9°C (48°F) -
Weather Conditions:
– Mostly sunny days with occasional rain.
– Mild evenings, contributing to comfort. -
Visitor Perspectives:
– Ideal conditions for outdoor activities.
– Some may prefer warmer climates for vacation. -
Seasonal Variations:
– Slightly cooler due to winter season.
– Potential for variability in yearly averages. -
Activities and Events:
– Holiday festivities attract visitors.
– Opportunities for winter sports in nearby areas.
December Weather in San Diego, CA: Monthly Averages and Best Times to Visit
December weather in San Diego, CA, features average high temperatures around 18°C (64°F) and average low temperatures near 9°C (48°F). Sunny and mild conditions characterize this month, making it enjoyable for various activities. San Diego experiences mild evenings, which add to overall comfort during this time.
Weather conditions in December indicate a predominant pattern of mostly sunny days with some potential for rain. Average rainfall in December is about 2.17 inches. The temperatures remain consistent throughout the month, providing a pleasant environment for locals and visitors.
Visitor perspectives on December in San Diego often highlight the ideal conditions for outdoor activities. Residents and tourists alike take advantage of the mild weather. However, some travelers might prefer warmer climates for holiday vacations, illustrating a desire for varied temperature experiences.
Seasonal variations show that December is one of the cooler months in San Diego. Although the average temperatures remain mild, fluctuations can occur. For example, historical data shows that in some years, temperatures have dropped lower than the usual averages.
Activities and events in San Diego attract numerous visitors during December. The city hosts various holiday festivities, and outdoor events abound. The mild winter weather also allows for winter sports in nearby mountainous regions, expanding recreational options.
In summary, December in San Diego, CA, is characterized by mild temperatures, sunny weather, and numerous activities that appeal to both residents and visitors.
How Much Rainfall Can Be Expected in December in San Diego, CA?
In December, San Diego, CA, typically experiences an average rainfall of about 2.3 inches. This amount suggests that the month is relatively wetter compared to other months in the year, as San Diego has a semi-arid climate.
Rainfall patterns in December can vary due to several factors, including weather systems and oceanic conditions. On average, December has about 8 days of measurable rain, which means that precipitation can be sporadic. Rainfall totals can range from less than an inch in drier years to over 5 inches during particularly wet seasons.
For instance, in December 2019, San Diego recorded nearly 5.5 inches of rain, largely due to a series of winter storms. Conversely, in December 2020, rainfall was only about 0.4 inches, reflecting a year with below-average precipitation.
Factors influencing rainfall include El Niño and La Niña phenomena. El Niño years tend to bring wetter winters, while La Niña years might lead to drier conditions. Local geography, such as mountains to the east, can also affect precipitation by blocking moist air from reaching certain areas.
In summary, December rainfall in San Diego averages around 2.3 inches, with variability influenced by climate patterns and geographic features. These fluctuations highlight the importance of monitoring weather forecasts for accurate predictions. Further exploration could include studying long-term climate trends to understand the implications for water resource management in the region.
What Are the Typical Cloud Cover and Sunshine Hours in December in San Diego, CA?
The typical cloud cover in December in San Diego, CA, is moderate, with an average of 40% to 60%. Sunshine hours average around 6 to 8 hours per day during this month.
- Cloud Cover
- Sunshine Hours
- Temperature Variation
- Precipitation Levels
- Wind Conditions
The following sections will provide detailed explanations of each aspect that contributes to San Diego’s weather in December.
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Cloud Cover:
The average cloud cover in December in San Diego is typically between 40% to 60%. This means that on any given day, clouds may cover nearly half to all of the sky. High cloud cover can lead to overcast conditions, which may impact temperature and sunlight exposure. According to the National Weather Service, cloud cover is important as it influences local climate patterns and affects how much sunlight reaches the ground. -
Sunshine Hours:
Sunshine hours in December average between 6 to 8 hours per day. This means that residents can expect a significant amount of sunshine, even during the shortest days of the year. The amount of sunshine varies due to factors like cloud cover and seasonal shifts. A study by the California Climate Data Archive noted that sunny days in December provide warmth and energy, beneficial for outdoor activities despite the cooler temperatures. -
Temperature Variation:
December temperatures in San Diego typically range from 50°F to 65°F. Nights can feel colder, while afternoons often provide pleasant conditions. The temperature variation affects how people experience outdoor events and activities. According to a report by the National Oceanic and Atmospheric Administration (NOAA), these temperatures can create comfortable conditions for visitors enjoying the holiday season. -
Precipitation Levels:
December is known for being part of the rainy season in San Diego, with average precipitation levels of about 1.5 to 3 inches. Rainfall can occur as short showers or longer periods of drizzle. The San Diego Regional Water Quality Control Board notes that while rain contributes to local water supply, it can also lead to changes in outdoor plans due to wet conditions. -
Wind Conditions:
Wind conditions in December are generally mild, with average speeds ranging from 5 to 10 mph. Occasional gusts may occur, especially during weather systems. Wind can affect the perceived temperature, making it feel cooler than the actual temperature. The Weather Channel identifies wind as a crucial factor influencing visitor comfort and enjoyment, particularly for outdoor events and gatherings.
How Does December Weather in San Diego, CA Compare to Other Months?
December weather in San Diego, CA, is mild and comparatively cooler than other months. Average temperatures in December range from 50°F to 65°F. This is cooler than the summer months, which often see highs above 75°F. December usually experiences more rainfall than the preceding months, averaging about 2.4 inches. The humidity remains moderate, providing a comfortable atmosphere.
Daily sunshine persists, with about 7 hours of sunlight. Coastal fog is occasional but less frequent than summer months. December’s weather makes it an ideal time for outdoor activities, such as hiking and visiting attractions, without the summer crowds. Overall, December presents a mild climate, allowing for enjoyable experiences while distinguishing itself with slightly cooler temperatures and increased precipitation compared to other months.
What Are the Best Outdoor Activities to Enjoy in San Diego, CA During December?
San Diego, CA offers a variety of enjoyable outdoor activities in December. Visitors can explore the pleasant weather and beautiful scenery through numerous options.
- Beach Activities
- Hiking Trails
- Whale Watching
- Outdoor Markets
- Holiday Events
- Biking along the Coast
The diverse activities provide different ways to appreciate San Diego’s outdoor environment in December.
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Beach Activities: Beach activities in San Diego include sunbathing, building sandcastles, and beach volleyball. The weather is mild, making it comfortable for enjoying the sandy shores. According to the National Oceanic and Atmospheric Administration (NOAA), December temperatures typically range from the mid-50s to low-70s Fahrenheit, allowing for pleasant beach outings. Even in winter, the ocean can attract surfers and visitors looking to stroll along the coastline.
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Hiking Trails: Hiking trails in San Diego offer stunning views and varied terrain. Locations like Torrey Pines State Natural Reserve and Balboa Park provide accessible trails for all fitness levels. Hiking in cool, crisp December weather can enhance the experience. The San Diego Tourism Authority notes that winter offers clearer skies, which makes for great panoramic views from popular hiking spots.
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Whale Watching: Whale watching is a popular December activity as gray whales migrate south along the California coast. Several local tour companies offer boat trips for spotting these majestic creatures. Research by the American Cetacean Society shows that the migration spans from December to April, making December a prime time for observing whales.
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Outdoor Markets: San Diego features outdoor markets, such as the Little Italy Mercato. These markets host local vendors selling fresh produce, crafts, and food. They create a festive atmosphere during the holiday season. The market operates year-round on Saturday mornings and allows visitors to enjoy the community spirit in pleasant weather.
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Holiday Events: Holiday events such as light displays and parades occur throughout San Diego. Events like the ‘San Diego Bay Parade of Lights’ feature decorated boats in the harbor. Local parks also host holiday-themed activities. Information from the San Diego Union-Tribune highlights that such events foster a sense of community and festive spirit.
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Biking along the Coast: Biking along the coast provides a unique way to experience San Diego’s beautiful scenery. The city offers numerous bike paths, such as the Mission Bay Bike Path, which is perfect for leisurely rides. Studies from the League of American Bicyclists indicate that access to beautiful biking routes can enhance outdoor recreation experiences.
In summary, various outdoor activities await those visiting San Diego in December, from relaxing beach visits to engaging in thrilling whale watching.
What Clothing Should You Pack for December Weather in San Diego, CA?
For December weather in San Diego, CA, you should pack layers, including light jackets, sweaters, long pants, and comfortable footwear.
Here are the main clothing items to consider:
- Light jackets or sweaters
- Long-sleeve shirts
- Long pants or jeans
- Comfortable footwear (sneakers or walking shoes)
- Accessories (scarves and hats)
As December in San Diego can feature mild temperatures during the day and cooler evenings, these clothing items will keep you comfortable throughout the day.
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Light Jackets or Sweaters:
Light jackets or sweaters are essential attire for December in San Diego. Daytime temperatures typically reach around 65°F (18°C) but can drop to approximately 50°F (10°C) in the evening. A lightweight jacket provides warmth against brisk winds and cool evenings. For instance, a denim jacket or a light fleece works well and offers versatility for various outfits. -
Long-Sleeve Shirts:
Long-sleeve shirts are suitable for layering. They keep you warm while being comfortable during daytime activities. A lightweight cotton or thermoregulating fabric allows breathability without overheating. In December, layering a long-sleeve shirt under a jacket or sweater can help you adjust to changing temperatures throughout the day. -
Long Pants or Jeans:
Long pants or jeans provide comfort and warmth. The climate of San Diego in December can be unpredictable, and opting for long pants shields against cooler breezes. Denim jeans or lightweight chinos are practical choices for various occasions, whether trekking along the coast or dining out. -
Comfortable Footwear (Sneakers or Walking Shoes):
Comfortable footwear is crucial for exploring San Diego. Sneakers or walking shoes offer support during extensive outdoor activities. A study by the American Podiatric Medical Association emphasizes that comfortable shoes improve foot health, particularly during travel. Choose shoes that offer good traction, as some areas may have uneven surfaces. -
Accessories (Scarves and Hats):
Accessories such as scarves and hats add extra warmth and style. A lightweight scarf can be easily added or removed based on temperature changes throughout the day. Hats protect against sudden gusts of wind and can help shield against the sun when exploring the city. According to a report by the National Weather Service, wind chill can lead to temperatures feeling significantly colder in December, making these accessories valuable during your trip.
When Is the Ideal Time to Visit San Diego, CA in December for Optimal Weather?
The ideal time to visit San Diego, CA, in December for optimal weather is during the first two weeks. In this period, daytime temperatures typically range from 60°F to 70°F. The weather tends to be mild and comfortable, with lower chances of rainfall. The first week usually offers the best balance of pleasant weather and fewer crowds. Visitors can enjoy outdoor activities and attractions comfortably. By mid-December, temperatures may start to drop slightly, and holiday visitors may increase, making it less ideal for certain activities. Thus, the first two weeks of December provide the best conditions for enjoying San Diego’s outdoor experiences.
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