Washington Weather by Month
Washington State, located in the Pacific Northwest, is known for its diverse climate, which varies significantly across its regions. The state is divided by the Cascade Range into two distinct climatic zones. Western Washington, including cities like Seattle, experiences a maritime climate characterized by mild, wet winters and cool, dry summers. This region is famous for its frequent rainfall, particularly in the winter months, contributing to the lush, green landscapes and dense forests. In contrast, Eastern Washington has a continental climate, with hotter summers and colder winters, and significantly less precipitation. The state’s varied topography, which includes mountains, valleys, and coastal areas, influences its weather patterns, leading to a wide range of conditions throughout the year. This diversity makes Washington a year-round destination, offering everything from skiing and snowboarding in the Cascades during winter to hiking and wine tasting in the sunny regions of the east during summer. Whether you’re exploring the rainforests of the Olympic Peninsula or the arid landscapes of the Columbia Basin, Washington’s climate plays a crucial role in shaping its natural beauty and outdoor opportunities.
| Month | Average Temperature (°F) | Average Temperature (°C) | Average Precipitation (in) |
|---|---|---|---|
| January | 36-47 | 2-8 | 5.4 |
| February | 37-50 | 3-10 | 4.4 |
| March | 39-54 | 4-12 | 4.2 |
| April | 42-59 | 6-15 | 3.1 |
| May | 47-65 | 8-18 | 2.2 |
| June | 52-70 | 11-21 | 1.6 |
| July | 56-76 | 13-24 | 0.7 |
| August | 57-76 | 14-24 | 0.9 |
| September | 52-71 | 11-22 | 1.5 |
| October | 46-60 | 8-16 | 3.5 |
| November | 40-51 | 4-11 | 6.5 |
| December | 36-46 | 2-8 | 5.9 |
January
Weather Description
January in Washington is typically cold and wet, particularly in Western Washington, where the average temperatures range from 36°F to 47°F (2°C to 8°C). The Cascade Mountains receive significant snowfall, making it a prime time for winter sports. Eastern Washington experiences colder temperatures, with less precipitation, leading to drier, but still cold, conditions.
Clothes to Wear
In January, it’s important to dress warmly and be prepared for rain or snow. A waterproof winter coat, thermal layers, gloves, a hat, and waterproof boots are essential, especially in the western part of the state. In the mountains, snow gear, including insulated jackets and pants, is necessary for outdoor activities.
Major Landmarks Recommended
For winter sports enthusiasts, Mount Rainier and Stevens Pass offer excellent skiing and snowboarding. Leavenworth, a Bavarian-themed village, is charming in winter, with snow-covered streets and winter festivals. Olympic National Park provides a unique winter experience, with snowshoeing opportunities in the mountains and mild coastal weather perfect for exploring the rainforests.
February
Weather Description
February continues the cold and wet trend in Washington, with temperatures slightly rising to an average range of 37°F to 50°F (3°C to 10°C). Western Washington remains damp, with frequent rain, while the Cascades and Eastern Washington still see snow. The days gradually lengthen, offering more daylight for outdoor activities.
Clothes to Wear
Dressing in layers is crucial in February, with a focus on waterproof and windproof clothing. A warm, waterproof jacket, thermal layers, and waterproof boots are necessary for staying dry and comfortable. Gloves, a hat, and a scarf are also recommended, particularly for those heading to higher elevations or spending extended time outdoors.
Major Landmarks Recommended
Snoqualmie Pass is an excellent destination for skiing and snowshoeing, with scenic winter landscapes. Seattle offers indoor attractions like the Seattle Art Museum and Pike Place Market, perfect for rainy days. Walla Walla in Eastern Washington, though cold, offers winter wine tasting and cozy fireplaces at local wineries, making it a delightful winter escape.
March
Weather Description
March in Washington marks the beginning of spring, with temperatures ranging from 39°F to 54°F (4°C to 12°C). While Western Washington still experiences rain, it becomes more intermittent, and signs of spring begin to emerge. In the mountains, snow remains, but lower elevations start to thaw, with blooming flowers and budding trees.
Clothes to Wear
March weather can be unpredictable, so wearing layers is key. A light to medium-weight jacket, along with waterproof footwear, is ideal for the variable conditions. It’s also wise to carry an umbrella or raincoat for sudden showers. In the mountains, winter gear is still necessary, especially for those engaging in snow sports.
Major Landmarks Recommended
As spring approaches, Skagit Valley comes alive with blooming daffodils and the early signs of the famous tulip season. Olympic National Park is ideal for exploring the temperate rainforests as they begin to green, and the lower trails become more accessible. Mount Baker continues to offer excellent late-season skiing and snowboarding for winter sports enthusiasts.
April
Weather Description
April brings a more noticeable shift toward spring, with temperatures averaging between 42°F and 59°F (6°C to 15°C). Rain is still common in Western Washington, but the state’s flora starts to bloom, offering a beautiful contrast to the often-gray skies. Snow in the mountains begins to melt, and lower elevations experience more mild and pleasant weather.
Clothes to Wear
Spring layers are essential in April. A medium-weight jacket, rain boots, and a waterproof outer layer will keep you comfortable in varying conditions. Consider wearing lighter layers underneath, as temperatures can rise during the day. An umbrella or raincoat is also advisable for the frequent showers.
Major Landmarks Recommended
April is the perfect time to visit the Skagit Valley Tulip Festival, where the fields are in full bloom with vibrant colors. Washington’s Wine Country begins to wake up, offering spring wine releases and scenic vineyard views. Deception Pass State Park is ideal for hiking and exploring coastal cliffs as the weather becomes more favorable.
May
Weather Description
May in Washington signals the arrival of warmer weather, with average temperatures ranging from 47°F to 65°F (8°C to 18°C). The state becomes lush and green, with flowers blooming and trees fully leafing out. Rain showers are common, but the warmer temperatures make this a pleasant month for outdoor activities.
Clothes to Wear
May requires a versatile wardrobe to handle the variable weather. Light layers such as t-shirts and long-sleeve shirts, paired with a light jacket or sweater, are ideal. Waterproof clothing, including a rain jacket and sturdy boots, is recommended for those venturing into nature. As temperatures rise, you can start to swap heavier winter gear for lighter, more breathable options.
Major Landmarks Recommended
May is an excellent time to visit Mount St. Helens National Volcanic Monument, where the warm weather and blooming vegetation offer stunning hiking and exploration opportunities. The San Juan Islands are another top destination, offering whale watching, kayaking, and picturesque coastal views. Olympic National Park’s trails become more accessible, with wildflowers in bloom and waterfalls at their peak.
June
Weather Description
June ushers in the warmth of early summer in Washington, with temperatures ranging from 52°F to 70°F (11°C to 21°C). The state’s landscapes are lush and green, with wildflowers in full bloom. Higher elevations still retain snow, but the weather is generally mild and pleasant, making it an ideal time for outdoor activities.
Clothes to Wear
With the arrival of warmer weather, lighter clothing becomes more appropriate. T-shirts, light long-sleeve shirts, and hiking pants are ideal for daytime activities. However, evenings can still be cool, so a light jacket or fleece is recommended. Sunscreen, hats, and sunglasses are also important to protect against the strong summer sun.
Major Landmarks Recommended
June is one of the best times to explore North Cascades National Park, where the warm weather makes for excellent hiking and wildlife viewing. The Columbia River Gorge offers beautiful drives and waterfall hikes, with the lush greenery of early summer. For those interested in cultural history, the Seattle Art Museum hosts summer exhibits that provide fascinating insights into the state’s artistic heritage.
July
Weather Description
July is the warmest month in Washington, with temperatures averaging between 56°F and 76°F (13°C to 24°C). The weather is generally warm and dry, making it the peak season for outdoor activities. This is the best time to explore Washington’s natural beauty, from its mountains to its coastlines.
Clothes to Wear
Summer attire is suitable for July, including t-shirts, shorts, and breathable fabrics. However, temperatures can drop in the evenings, so a light jacket or sweater is still advisable. Comfortable hiking shoes or sandals are recommended for outdoor activities, and don’t forget sun protection, including sunscreen, hats, and sunglasses.
Major Landmarks Recommended
July is perfect for visiting Mount Rainier National Park, where the wildflowers are in full bloom, and the trails are snow-free. Lake Chelan is a popular destination for boating, swimming, and wine tasting. The Washington Coast, particularly the Olympic Peninsula, offers stunning beaches and temperate rainforests, ideal for camping and exploring.
August
Weather Description
August continues the warm summer weather in Washington, with temperatures ranging from 57°F to 76°F (14°C to 24°C). The days are long and sunny, making it an ideal month for outdoor adventures. This is the driest month of the year, particularly in Western Washington, offering perfect conditions for exploring the outdoors.
Clothes to Wear
Light, breathable clothing is best for August, with t-shirts, shorts, and comfortable hiking gear being essential. A lightweight rain jacket or poncho can be useful in case of unexpected showers. Sun protection remains important, so hats, sunglasses, and sunscreen are necessary for any outdoor activities.
Major Landmarks Recommended
August is an excellent time to explore Mount Rainier, with its clear skies and warm weather making for perfect hiking conditions. The San Juan Islands offer incredible opportunities for kayaking, whale watching, and enjoying the serene coastal environment. Seattle’s outdoor events, such as music festivals and farmers’ markets, are in full swing, offering a taste of the city’s vibrant summer culture.
September
Weather Description
September in Washington marks the beginning of fall, with temperatures cooling to an average range of 52°F to 71°F (11°C to 22°C). The days are still warm and pleasant, but the nights become cooler, and the first signs of autumn appear in the changing colors of the leaves. This is one of the best months for outdoor activities, with fewer crowds and stunning landscapes.
Clothes to Wear
Layering is key in September, as temperatures can vary widely throughout the day. A combination of t-shirts, long-sleeve shirts, and a medium-weight jacket or fleece is recommended. Comfortable hiking boots and a hat are essential for exploring the outdoors, and a light rain jacket can be useful for unexpected showers.
Major Landmarks Recommended
September is a prime time to visit North Cascades National Park, where the fall colors begin to emerge, creating a stunning backdrop for hiking and photography. The Olympic Peninsula offers some of the most scenic drives in the state, with the added bonus of fall colors. Walla Walla’s wine country is another must-see destination, with harvest season in full swing and beautiful vineyard views.
October
Weather Description
October in Washington brings more noticeable autumn weather, with temperatures averaging between 46°F and 60°F (8°C to 16°C). The state begins to prepare for winter, with cooler days and chilly nights. Snowfall is possible, particularly at higher elevations, and the fall colors reach their peak, creating a beautiful contrast against the rugged terrain.
Clothes to Wear
As temperatures drop, warmer clothing becomes necessary. Layered clothing, including long-sleeve shirts, sweaters, and a warm jacket, is ideal for October. A beanie, gloves, and waterproof boots are recommended for those venturing into higher elevations or preparing for the possibility of early snowfall.
Major Landmarks Recommended
October is a great time to visit Leavenworth, where the town’s Oktoberfest celebrations bring a festive atmosphere amidst the stunning fall foliage. Mount Rainier offers breathtaking views of autumn colors, with fewer crowds and cooler weather. Olympic National Park is another must-see destination, offering excellent hiking and wildlife viewing as the park transitions from fall to winter.
November
Weather Description
November in Washington signals the transition from fall to winter, with average temperatures ranging from 40°F to 51°F (4°C to 11°C). Snow becomes more common, especially in the mountains, and the state begins to experience winter conditions. The days are shorter, and the weather is often cold and crisp.
Clothes to Wear
Warm, insulated clothing is necessary for November, including thermal layers, a heavy winter coat, and insulated boots. Hats, gloves, and scarves are also important to protect against the cold. If you plan to spend time outdoors, consider wearing waterproof clothing to handle snow and slush.
Major Landmarks Recommended
November is a quieter time to visit Mount Rainier National Park, where the snow-capped mountains create a breathtaking winter landscape. Olympic National Park begins to transition to winter operations, offering a peaceful and serene environment for wildlife viewing. The Washington State Capitol in Olympia is a great indoor destination to learn more about the state’s history and government.
December
Weather Description
December in Washington is marked by cold temperatures and frequent snowfall, with average temperatures ranging from 36°F to 46°F (2°C to 8°C). The state is transformed into a winter wonderland, with snow covering the mountains and plains. The days are short, but the festive atmosphere of the holiday season brings warmth and cheer to the cold winter days.
Clothes to Wear
Winter gear is essential in December, including thermal underwear, a thick sweater, a heavy winter coat, and insulated boots. Accessories like hats, gloves, and scarves are necessary to protect against the cold and wind. Layering is key to staying warm, especially if you plan to spend time outdoors.
Major Landmarks Recommended
December is the perfect time to visit Leavenworth, where the town is decked out in holiday lights and decorations, offering a festive experience. Mount Baker and Stevens Pass are excellent destinations for skiing and snowboarding, with reliable snowfall and well-maintained trails. Seattle hosts various holiday events, including the Christmas Ship Festival, which adds a festive glow to the city’s waterfront.
