Seattle Weather: A September Forecast

Seattle in September typically offers a delightful transition from summer to autumn, characterized by pleasant temperatures, reduced rainfall compared to the wetter months, and the stunning backdrop of changing foliage. This article provides a comprehensive overview of what to expect weather-wise in Seattle during September, helping residents and visitors alike plan their activities and pack accordingly. We'll delve into average temperatures, precipitation patterns, and what you can anticipate when exploring the Emerald City during this beautiful month.

Average Seattle Weather Conditions in September

September in Seattle is often seen as one of the most agreeable times to visit, with conditions usually being mild and comfortable. The weather begins to shift from the warmth of summer, with the promise of crisp, clear days and a hint of the coming autumn season. Understanding the average temperature, precipitation, and other weather patterns can significantly help in planning your visit or simply preparing for the month ahead.

The average high temperature in Seattle during September is around 70°F (21°C), while the average low hovers around 53°F (12°C). These temperatures provide a comfortable climate for outdoor activities, such as hiking, exploring parks, and enjoying the city's many attractions. The early part of September often feels like an extension of summer, with warm, sunny days that gradually transition into cooler evenings as the month progresses. As September advances, you'll begin to experience the subtle changes of the season, including the presence of colorful foliage and the freshness of the air. The variation in temperature throughout September can be noticeable, with the potential for warmer spells and the occasional cooler snap, so it is always wise to be prepared for a variety of conditions.

Precipitation levels in Seattle during September are generally lower than the wetter months of the year, but it's still wise to pack for some rain. On average, Seattle receives about 1 to 2 inches of rainfall during September, which is a significant decrease from the rainier months like November and December. While you might encounter rain, it is unlikely that you'll experience extended periods of heavy rainfall. This makes September a particularly good time to explore the outdoors. The reduction in precipitation contributes to the feeling of a comfortable and enjoyable climate, allowing for easier navigation and outdoor activities. The chance of sunshine is high, creating ideal conditions for sightseeing, enjoying outdoor events, or simply relaxing in one of the city’s many parks.

In addition to temperature and precipitation, the daylight hours start to decrease in September, reflecting the change of season. You can expect around 12 to 13 hours of daylight at the beginning of the month, gradually decreasing as the month progresses. Shorter days mean a cooler overall feel, and they contribute to the crisp autumn atmosphere that defines September. You can still make the most of the available daylight by planning your outdoor activities accordingly. Enjoy the morning sunshine with a hike or a walk, or appreciate the long shadows and beautiful light of the late afternoon while exploring Seattle's parks and waterfront. These changing daylight patterns add to the unique character of Seattle in September and offer a beautiful backdrop to your activities.

Another factor to consider during September is the presence of occasional fog, particularly in the mornings. While the fog typically dissipates by late morning or early afternoon, it can affect visibility. Be sure to exercise caution if you plan to drive or engage in outdoor activities early in the day. The fog usually clears up relatively quickly, revealing bright, sunny skies and pleasant temperatures. The presence of fog contributes to the overall charm and mystique of Seattle, offering unique photo opportunities and adding to the serene atmosphere of the early mornings.

What to Pack for Seattle in September

When preparing for a trip to Seattle in September, it's crucial to pack versatile clothing that can adapt to changing weather conditions. The key is to be prepared for both warm, sunny days and cooler, potentially rainy days. Layering is your best strategy. Packing a variety of clothing items allows you to adjust to the changing temperatures easily and remain comfortable throughout the day. The Gilded Age Season 3: Everything We Know

Essential items to pack include lightweight layers such as t-shirts, long-sleeved shirts, and a sweater or fleece. These items will provide the base for your layering strategy. These layers are essential for staying comfortable as the temperature fluctuates throughout the day. You can easily add or remove layers to adapt to the changing conditions. Including a versatile jacket is another essential component of your packing list. A waterproof, wind-resistant jacket is essential for protection against rain and wind. Even if you don’t anticipate significant rain, it’s always a good idea to have a jacket on hand, as the weather in Seattle can be unpredictable. A good quality jacket will provide you with peace of mind and keep you dry and comfortable.

Also, bringing a pair of comfortable walking shoes is a must. You'll likely be doing a lot of walking to explore the city’s attractions and enjoy the outdoor scenery. Make sure to bring shoes that you can wear for long periods without discomfort. Consider waterproof or water-resistant shoes to protect your feet from potential rain. This will allow you to comfortably navigate the city and enjoy the natural beauty of Seattle without being hindered by discomfort or unfavorable weather conditions. African American History Shirts: Celebrate Heritage

An umbrella or a rain hat can be useful, especially if you are sensitive to rain. Although September tends to be less rainy than the winter months, it's always wise to be prepared for rain. A compact umbrella or a rain hat can easily fit in your bag and provide you with immediate protection from the rain whenever it occurs.

Finally, pack sunglasses and sunscreen. Even though the weather might be cooler, the sun can still be strong, especially on clear days. Sunglasses will protect your eyes, and sunscreen will protect your skin from harmful UV rays. These items are essential for enjoying the outdoors comfortably and safely, protecting you from the sun’s glare and potential damage.

Events and Activities in Seattle During September

September in Seattle provides a variety of events and activities perfect for both residents and visitors. The city comes alive with festivals, outdoor concerts, and seasonal attractions. Whether you're a local or a visitor, there's something for everyone to enjoy. From cultural celebrations to outdoor adventures, the Emerald City offers a wide array of options to make the most of the pleasant September weather.

The Bumbershoot Festival is a popular arts and music festival held annually in Seattle during Labor Day weekend, which usually falls in early September. It features a diverse lineup of musicians, comedians, and artists. This event offers a great opportunity to experience Seattle's vibrant cultural scene, and attracts visitors from around the region and beyond. The festival provides a rich experience, where visitors can engage with a variety of artistic expressions, from music and comedy to visual arts and performance.

Seattle also hosts a variety of outdoor concerts and events throughout September. Many parks and outdoor venues offer live music, film screenings, and other performances. These events provide a fantastic way to enjoy the pleasant weather and experience the city's entertainment options. Check local listings for specific events, such as concerts in parks, outdoor movie nights, and other community gatherings that take place throughout the month. These activities offer the opportunity to enjoy the outdoors while experiencing entertainment and community spirit.

Enjoying the natural beauty of Seattle is an essential part of any September experience. Take advantage of the mild weather to explore parks, gardens, and trails. Discovery Park, with its stunning views of the Puget Sound and the Olympic Mountains, is an excellent choice for a day hike. Exploring the park and taking in its vast landscapes is a great way to spend a beautiful day. The park provides opportunities to hike, walk, or simply enjoy the views of the water and the mountains.

For those interested in exploring the waterfront, a visit to the Seattle Great Wheel is a must. The Ferris wheel offers panoramic views of the city, the Puget Sound, and the surrounding mountains. This attraction is a great way to experience the city from a unique perspective and offers a memorable experience for both visitors and locals. You can also explore other waterfront attractions, such as the Seattle Aquarium, the historic piers, and the various restaurants and shops that line the waterfront.

Another great outdoor activity is a visit to the Pike Place Market. The market is open year-round, but September provides a pleasant climate for exploring the many shops, restaurants, and vendors. From fresh produce and flowers to local crafts and souvenirs, the market offers a vibrant atmosphere and a diverse range of products. Exploring Pike Place Market is a must-do activity, offering a quintessential Seattle experience. You can taste local treats, enjoy the colorful displays, and experience the local culture.

Planning Your Trip to Seattle in September

To make the most of your trip to Seattle in September, it is essential to plan ahead and consider various factors. You want to prepare so your visit aligns with your interests and preferences. This involves researching activities, booking accommodations, and considering transportation options, all of which will improve your overall experience.

When planning your trip, it's important to research and book accommodations in advance. September is a popular time to visit Seattle, so securing your preferred lodging early on is advisable. Choose accommodations based on your budget, your location preferences, and the amenities you require. Consider hotels, vacation rentals, or bed and breakfasts, depending on your needs. Booking in advance ensures you have a comfortable place to stay, and it often gives you access to better rates and more choices.

Another crucial aspect of trip planning is considering transportation. Seattle offers several transportation options, including public transit, ride-sharing services, and car rentals. If you plan to explore the city and its surrounding areas, assess the best modes of transportation for your itinerary. Public transit, such as buses and light rail, provides a convenient and cost-effective way to get around the city. Ride-sharing services, like Uber and Lyft, are widely available and offer flexibility. If you want to explore the surrounding areas, such as the Cascade Mountains or the Olympic Peninsula, renting a car might be the best option.

Consider the specific events and activities you are most interested in when creating your itinerary. Research festivals, concerts, and other events happening during your visit. Check event schedules and purchase tickets in advance when necessary. Also, consider your interests and preferences. Do you want to explore the city’s parks and gardens, visit museums, or indulge in local cuisine? Tailor your itinerary to match your interests, ensuring that you have a fulfilling and enjoyable experience.

Finally, be aware of potential travel advisories and updates before and during your trip. Check the local news and weather forecasts for any warnings or changes that might affect your travel plans. Stay informed about local events and any traffic disruptions. This will help you stay safe and make the most of your visit to Seattle.

Tips for Enjoying Seattle in September

To fully enjoy your visit to Seattle in September, it's useful to keep a few tips in mind. Enjoying the local culture and taking advantage of the specific seasonal opportunities can greatly enhance your trip. Here are some recommendations to help you make the most of your Seattle experience.

Embrace the local coffee culture. Seattle is known for its vibrant coffee scene. Visit local coffee shops, try different brewing methods, and enjoy a cup of coffee in the city’s various neighborhoods. This will not only energize you but also give you a deeper understanding of the local lifestyle. Seattle is a city where coffee is an art form, with unique blends and passionate baristas. You can explore the history of coffee, from the origins of the beans to the different brewing techniques, all within the city’s local coffee houses.

Explore Seattle’s diverse neighborhoods, each with its unique character and attractions. Consider visiting neighborhoods like Ballard, known for its maritime heritage and trendy restaurants; Fremont, known for its quirky public art and eclectic shops; and Capitol Hill, known for its vibrant nightlife and diverse culinary scene. Each neighborhood offers different attractions, dining options, and cultural experiences. Exploring these areas will provide you with a richer understanding of Seattle's multifaceted culture and lifestyle.

Take advantage of the outdoor opportunities. September is an excellent time to explore parks, gardens, and waterfront areas. Spend time in parks such as Discovery Park or Gas Works Park, visit the Seattle Waterfront, or explore the many hiking trails in the surrounding areas. Make the most of the pleasant weather by participating in outdoor activities, like hiking, biking, or simply taking a walk.

Consider a day trip to the surrounding areas, such as the San Juan Islands or the Cascade Mountains. These destinations offer breathtaking natural beauty and a variety of outdoor activities. The San Juan Islands are known for their whale watching tours and stunning scenery, while the Cascade Mountains offer hiking, scenic drives, and other outdoor adventures. Taking a day trip can enhance your overall experience by providing a diverse range of activities and enriching your journey.

Finally, be prepared for the occasional rain and embrace the city’s unique charm. Seattle is known for its rainy weather, even in September. Pack appropriate rain gear and enjoy the city's beauty, even on a rainy day. There are many indoor activities, such as museums and art galleries, that you can enjoy. Appreciate Seattle's unique atmosphere, known for its combination of natural beauty, innovative culture, and relaxed lifestyle.

Frequently Asked Questions about Seattle Weather in September

What is the average temperature in Seattle in September?

The average high temperature in Seattle in September is around 70°F (21°C), while the average low is about 53°F (12°C). The temperatures provide a comfortable climate for enjoying the outdoor activities available. You will find the weather mild and comfortable.

How much rain can I expect in Seattle in September?

Seattle typically receives about 1 to 2 inches of rainfall in September. Rainfall is relatively low compared to the rainier months of the year, like November and December. The chances of sunshine are high, which is excellent for sightseeing and outdoor activities.

Are there any major events in Seattle during September?

Yes, the Bumbershoot Festival is a major arts and music festival that usually occurs during Labor Day weekend, which is the beginning of September. There are also outdoor concerts and events throughout the month. Check local listings for specific event information and schedules.

What should I pack for a trip to Seattle in September?

Pack lightweight layers, a waterproof jacket, comfortable walking shoes, and an umbrella. Be prepared for both warm and potentially rainy days. Bringing a variety of clothing allows you to adjust to changing temperatures. Pack sunscreen, sunglasses, and rain gear.

Is September a good time to visit Seattle?

Yes, September is often considered one of the best times to visit Seattle. The weather is generally mild and the precipitation is lower compared to the rainier months. The city also hosts various events, making it an ideal time for outdoor activities and exploration.

What outdoor activities are popular in Seattle in September?

Hiking, exploring parks like Discovery Park, visiting the Seattle Waterfront, and attending outdoor concerts and events are popular. Enjoy the pleasant weather while participating in outdoor activities. These include walking, exploring, and enjoying the city’s parks and other natural attractions. Pakistan Vs Afghanistan: Cricket Match Insights

What should I do if it rains during my visit to Seattle in September?

Visit museums, art galleries, and indoor attractions. Seattle has several indoor options, such as the Museum of Pop Culture (MoPOP) or the Seattle Art Museum (SAM). Also, explore the city’s coffee shops or enjoy a cozy meal at one of the many restaurants. Embrace the city's unique charm, even on a rainy day.

Are there any day trip options from Seattle in September?

Yes, consider day trips to the San Juan Islands or the Cascade Mountains. These areas offer opportunities for whale watching, hiking, and scenic drives. These trips can add a great deal of richness to your experience.

National Weather Service

Visit Seattle

The Weather Channel

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