Seattle Weather In December: What To Expect

December in Seattle, Washington, marks the heart of the Pacific Northwest's winter season. Known for its evergreen landscapes and vibrant city life, Seattle takes on a unique charm during this time. However, understanding the Seattle WA weather in December is crucial for anyone planning a visit or residing in the Emerald City. This comprehensive guide delves into the typical weather conditions, what to expect, and how to prepare for December in Seattle, ensuring you can make the most of this cozy, festive month.

Understanding Seattle's December Climate

Seattle WA weather in December is characterized by cool temperatures, frequent rainfall, and relatively short daylight hours. Situated in the Puget Sound region, Seattle experiences a maritime climate, which means the city's weather is heavily influenced by the nearby Pacific Ocean. This influence leads to milder temperatures compared to other regions at the same latitude, but it also brings abundant moisture. The average high temperature in December hovers around 46°F (8°C), while the average low dips to about 37°F (3°C). While these temperatures aren't severely cold, the dampness in the air can make it feel chillier. Snowfall is not uncommon, but it rarely accumulates significantly in the city center due to the relatively mild temperatures. However, the surrounding Cascade and Olympic Mountains often receive substantial snowfall, offering opportunities for winter sports enthusiasts. Daylight hours are at their shortest in December, with the winter solstice occurring around December 21st. This means the days are shorter, and the nights are long, creating a cozy atmosphere in the city. Understanding these basic climate characteristics is the first step in preparing for December in Seattle. The combination of cool temperatures, rainfall, and shorter days creates a distinct seasonal ambiance that defines the city's winter experience. For those unaccustomed to such conditions, proper planning and preparation are key to enjoying all that Seattle has to offer during this time of year. This includes packing appropriate clothing, planning indoor activities, and taking advantage of the city's vibrant cultural scene, which thrives even in the winter months. By embracing the unique aspects of Seattle's December climate, visitors and residents alike can discover the beauty and charm of the city in its winter guise. The city's festive lights, cozy cafes, and cultural events provide a warm contrast to the cool, damp weather outside. Seattle in December is an experience that combines the tranquility of winter with the vibrancy of city life. Denver Weather In July: Sunshine, Storms, And Outdoor Fun

Typical Temperatures and Precipitation

Focusing on the specifics, Seattle WA weather in December typically presents a consistent pattern of cool temperatures and persistent precipitation. Average temperatures in December range from a high of 46°F (8°C) to a low of 37°F (3°C). While these temperatures might seem moderate, the high humidity and frequent rainfall can make the air feel colder, often necessitating warmer clothing than the numbers might suggest. December is one of Seattle's wettest months, with an average rainfall of around 5.5 inches (140 mm). This precipitation typically comes in the form of drizzle or light rain, often referred to locally as “Seattle mist.” However, heavier rain showers are also common, so being prepared for wet conditions is essential. Snowfall in Seattle during December is variable. Some years may see several significant snowfalls, while others may have little to no snow. When snow does fall, it often melts quickly in the city center due to the relatively mild temperatures. However, the surrounding areas, particularly the Cascade and Olympic Mountains, can experience substantial snowfall, making them popular destinations for winter sports. The frequency of rainy days is also a notable characteristic of Seattle's December weather. On average, the city experiences rain on about 20 days of the month. This means that visitors and residents should expect to encounter wet weather regularly and plan their activities accordingly. The combination of cool temperatures and frequent rainfall contributes to Seattle's reputation for being a rainy city. While the rain can sometimes be a deterrent, it also contributes to the lush, green landscapes that define the Pacific Northwest. The evergreen trees and moss-covered surfaces thrive in the damp climate, creating a unique and beautiful environment. In addition to rain, December in Seattle can also bring fog and overcast skies. The dense cloud cover can limit sunlight, which contributes to the shorter daylight hours during this time of year. Despite the frequent rain and cloud cover, there are still opportunities to enjoy outdoor activities in Seattle during December. With the right gear and a bit of flexibility, it's possible to explore the city's parks, gardens, and waterfront areas. The key is to be prepared for the weather and to embrace the unique charm of Seattle's winter climate.

What to Expect: Day-to-Day Weather Patterns

Understanding the day-to-day Seattle WA weather in December involves recognizing its variability and planning accordingly. While the overall trends point towards cool, wet conditions, each day can bring its own unique weather patterns. Mornings in Seattle during December often begin with a dense fog or low-hanging clouds, which can linger for several hours. As the day progresses, the fog may dissipate, giving way to a mix of sun and clouds, or it may persist throughout the day, creating a gray and misty atmosphere. Rainfall is a frequent occurrence, and it can vary from a light drizzle to a heavier downpour. The intensity and duration of the rain can change rapidly, so it's advisable to be prepared for all possibilities. It's not uncommon for Seattle to experience periods of sunshine even in December, offering a welcome respite from the grayness. These sunny breaks can be fleeting, but they provide opportunities to enjoy the city's outdoor spaces and natural beauty. Temperatures tend to remain relatively stable throughout the day, with only a slight difference between daytime highs and nighttime lows. This means that layering clothing is a practical approach to staying comfortable, as you can easily adjust your attire to suit changing conditions. The shorter daylight hours in December also influence the daily routine. Sunrise occurs relatively late in the morning, and sunset happens early in the afternoon, leaving fewer hours of natural light. This can affect outdoor activities and may require some adjustment to daily schedules. Despite the shorter days and frequent rain, Seattle maintains a vibrant atmosphere in December. The city is adorned with festive lights, and there are numerous indoor activities and events to enjoy. From visiting museums and art galleries to exploring local cafes and restaurants, there are plenty of options for entertainment and relaxation. Being aware of the typical day-to-day weather patterns in Seattle during December allows for better planning and preparation. By understanding the potential for fog, rain, and limited sunlight, you can make the most of your time in the city, regardless of the weather conditions. Embracing the variability of Seattle's December weather is key to appreciating its unique charm.

Preparing for the Weather: What to Wear and Pack

Preparing for Seattle WA weather in December requires careful consideration of clothing and packing essentials. Given the cool temperatures, frequent rainfall, and potential for dampness, dressing in layers is the most effective approach. This allows you to adjust your clothing to suit the changing conditions throughout the day. Start with a base layer of moisture-wicking fabric to keep your skin dry and comfortable. This is particularly important if you plan to engage in any outdoor activities. Add a middle layer of insulation, such as a fleece jacket or a wool sweater, to provide warmth. The outer layer should be waterproof and windproof to protect you from the rain and wind. A high-quality rain jacket or a waterproof coat is essential for staying dry in Seattle's wet climate. In addition to layering, it's important to choose the right type of footwear. Waterproof boots or shoes are a must-have for navigating the city's streets, which can often be wet and slippery. Look for footwear with good traction to prevent slips and falls. Warm socks are also crucial for keeping your feet comfortable in the cool temperatures. Wool or synthetic socks are good choices, as they provide insulation even when wet. Don't forget to pack accessories such as gloves, a scarf, and a hat. These items can make a significant difference in your comfort level, especially on colder days. A hat is particularly important, as it helps to retain body heat. An umbrella is another essential item to pack for Seattle in December. While a rain jacket will protect your upper body, an umbrella will keep your head and shoulders dry during heavier downpours. In addition to clothing, consider packing items such as a travel-sized first aid kit, any necessary medications, and personal care items. It's also a good idea to bring a reusable water bottle to stay hydrated, as well as a portable charger for your electronic devices. When packing for Seattle in December, the key is to be prepared for a range of conditions. By dressing in layers, choosing waterproof footwear, and packing essential accessories, you can ensure that you stay comfortable and dry, regardless of the weather. Super Bowl Start Time ET: Kickoff Time & How To Watch

Activities and Attractions in December Despite the Weather

Despite the Seattle WA weather in December, the city offers a plethora of activities and attractions to enjoy. The festive spirit is in full swing, with numerous holiday events and decorations adding to the city's charm. One of the most popular attractions during December is the Seattle Center Winterfest. This annual event features ice skating, a winter train village, and festive lights, creating a magical atmosphere. The Space Needle is also illuminated with holiday lights, offering stunning views of the city skyline. For those interested in shopping, Seattle's vibrant retail scene provides plenty of opportunities for finding unique gifts. The Westlake Center Holiday Carousel is a beloved tradition, and the many local boutiques and shops offer a wide range of products. If you're looking for indoor activities, Seattle has a wealth of museums and cultural institutions to explore. The Museum of Pop Culture (MoPOP) is a must-visit for music and science fiction fans, while the Seattle Art Museum (SAM) offers a diverse collection of art from around the world. The Seattle Aquarium is another popular attraction, showcasing the marine life of the Puget Sound and beyond. Food lovers will find plenty to enjoy in Seattle's diverse culinary scene. From cozy cafes to upscale restaurants, there's something to suit every taste. Many establishments offer seasonal menus and holiday specials during December, adding to the festive atmosphere. Performing arts are also a highlight of Seattle's December calendar. The Seattle Opera, Pacific Northwest Ballet, and local theater companies present a variety of holiday-themed performances, providing entertainment for all ages. For those who enjoy the outdoors, there are still opportunities to explore Seattle's parks and gardens, even in December. Discovery Park offers stunning views of the Puget Sound, and the Washington Park Arboretum is a beautiful place to stroll, regardless of the weather. With a little planning and preparation, it's easy to find enjoyable activities and attractions in Seattle during December. The city's festive atmosphere, diverse cultural offerings, and culinary delights make it a wonderful destination, even in the winter months. Embracing the city's indoor and outdoor options ensures a memorable experience, regardless of the weather conditions.

Tips for Staying Safe and Comfortable in Seattle's December Weather

Staying safe and comfortable in Seattle WA weather in December requires some practical tips and precautions. The combination of cool temperatures, rain, and shorter daylight hours can present some challenges, but with the right approach, you can navigate the city with ease. First and foremost, be sure to dress appropriately for the weather. Layering your clothing is essential, as it allows you to adjust to changing conditions. Wear a waterproof outer layer, warm socks, and waterproof footwear to stay dry and comfortable. Carrying an umbrella is also a good idea, especially during periods of heavy rain. When walking or driving in Seattle during December, be aware of the potential for slippery conditions. Wet leaves and icy patches can make sidewalks and roads hazardous, so take your time and wear shoes with good traction. If you're driving, be sure to check the weather forecast before you head out, and be prepared for potential delays due to traffic or road closures. The shorter daylight hours in December mean that it gets dark early, so it's important to be visible when walking or cycling. Wear bright or reflective clothing, and use lights on your bicycle or scooter. When exploring the city at night, stick to well-lit areas and be aware of your surroundings. It's also a good idea to carry a flashlight or use the flashlight on your phone for added visibility. If you're planning to spend time outdoors, be mindful of the potential for hypothermia. Dress warmly, stay dry, and take breaks indoors to warm up. If you start to feel cold or shiver uncontrollably, seek shelter immediately. Staying hydrated is also important, even in cold weather. Drink plenty of water throughout the day to prevent dehydration. If you're participating in outdoor activities, bring a thermos of hot tea or coffee to help you stay warm. Finally, be sure to check the weather forecast regularly and adjust your plans accordingly. Seattle's weather can change rapidly, so it's important to stay informed and be flexible. By following these tips, you can stay safe and comfortable in Seattle's December weather and enjoy all that the city has to offer. Find The Best Personal Injury Attorney: A Comprehensive Guide

Conclusion: Embracing Seattle's Winter Charm

In conclusion, the Seattle WA weather in December presents a unique blend of cool temperatures, frequent rainfall, and shorter daylight hours. While it may not be the ideal weather for everyone, with proper preparation and a positive attitude, you can fully embrace the city's winter charm. Understanding the typical weather patterns, dressing appropriately, and planning your activities accordingly are key to enjoying Seattle in December. The city's festive atmosphere, diverse cultural offerings, and cozy indoor spaces provide plenty of opportunities for entertainment and relaxation. From exploring museums and art galleries to enjoying holiday-themed performances and events, there's something for everyone to discover. The Pacific Northwest's natural beauty also shines through, even in winter. The evergreen trees, moss-covered landscapes, and stunning waterfront views create a unique and beautiful environment. With the right gear, you can still enjoy outdoor activities such as hiking, biking, and exploring the city's parks and gardens. Seattle's culinary scene is another highlight of December, with many restaurants and cafes offering seasonal menus and holiday specials. Cozying up in a local coffee shop or enjoying a warm meal in a festive setting can be a wonderful way to escape the cold and rain. Ultimately, experiencing Seattle in December is about embracing the season and appreciating its unique qualities. The city's winter charm lies in its cozy atmosphere, festive lights, and the opportunity to slow down and enjoy the simple pleasures of life. By being prepared for the weather and open to new experiences, you can create lasting memories in Seattle during this special time of year. So, pack your rain gear, bring a sense of adventure, and get ready to discover the beauty and charm of Seattle in December.

Photo of Robert M. Wachter

Robert M. Wachter

Professor, Medicine Chair, Department of Medicine ·

Robert M. Bob Wachter is an academic physician and author. He is on the faculty of University of California, San Francisco, where he is chairman of the Department of Medicine, the Lynne and Marc Benioff Endowed Chair in Hospital Medicine, and the Holly Smith Distinguished Professor in Science and Medicine