Weather In August In Seattle

Julian Sterling

-Apr 4, 2026, 5:01 PM

Local time is Sat 04th Apr 3:01 am Based on annual weather averages for Seattle, the best month to go for holiday is July and August. The temperature hovers around 20°c. The table below displays max and min temperature and rain data for the whole year as an average taken from last 12+ years of historical data for Seattle. When you think of Seattle, rainy days might spring to mind, but August brings a lovely change of pace! Let’s explore what makes Seattle's weather in August unique.

In August, Seattle enjoys its warmest weather of the year. Temperatures dance between 15°C (59°F) at night to 25°C (77°F) during the day. You might even catch glimpses of folks soaking up the sun in shorts and sunglasses, sipping iced lattes at street-side cafés. But don't pack away your jumper just yet; those coastal breezes can sneak up on you! Absolutely, mate! August is the perfect time if you're looking to escape the drizzles of spring and winter.

With longer days and plenty of sunshine, you can explore the stunning views of Mount Rainier or stroll through the vibrant Pike Place Market without a brolly in sight. Plus, the city buzzes with festivals and events that bring communities together. Loading weather chart ... Surprise, surprise! August is one of the driest months in Seattle. Rainfall averages only about 25mm, which means more days to explore without reaching for your raincoat. But being Seattle, there’s always a tiny chance of a light drizzle; keep an eye on the skies!

Packing for Seattle in August is all about layers. Here's a handy list: - Light jacket or sweater for cooler evenings. - Comfortable walking shoes, especially if you're heading to those iconic outdoor parks. - Sunglasses and a hat to bask in the sunshine. - Umbrella – just in case Seattle surprises you with a sudden sprinkle. - Swimwear if you're planning to dive into Lake Washington. Loading weather chart ... You bet there are! August hosts several spectacular events.

The Seafair Weekend is a highlight, with hydroplane races and dazzling fireworks over Lake Washington. Don't miss the Capitol Hill Block Party—the whole neighbourhood comes alive with music, food, and art. It’s a feast for the senses! Oh, for sure! Seattle becomes a haven for outdoor enthusiasts. Explore the lush greenery of Discovery Park or kayaking in the serene waters of Puget Sound. The cooler mornings are also perfect for a trek up Mount Si, rewarding climbers with breathtaking vistas. Loading weather chart ...

August is peak tourist season, so you’ll find the city bustling with visitors. While popular spots may be busier, it's also the perfect time to soak up the local culture at its most vibrant. If you're the type to relish in a lively atmosphere, this is your month! Loading weather chart ... Seattle’s August sunsets are nothing short of spectacular. Picture the sky painted in shades of orange, pink, and purple, reflecting off the water.

Many locals and visitors enjoy these breathtaking views from Gas Works Park, lounging with friends, family, and a picnic. Humidity in Seattle during August hovers around 65%, which is pretty comfortable. You won’t feel like you’re walking through a sauna, that's for sure! It's the kind of weather that lets you enjoy the city without the sticky feeling. Not really. Seattle tends to keep it cool and mellow with no major thunderstorms or heatwaves.

Of course, weather isn't always one to follow rules, so it's always smart to check forecasts before planning outdoor adventures. One quirky thing about Seattle’s August weather is the "marine layer" in the mornings—a blanket of cool, moist air from the Pacific. It ushers in foggy mornings and clears to bright afternoons, providing two ‘weather moods’ in one day! Seattle typically has warmer and drier weather in August than other Pacific Northwest cities like Portland or Vancouver.

While they share the same lovely coastal vibe, Seattle often wins in the sunshine department. It's a lovely balance of summer fun and cool breezes! So, there you have it—a vibrant snapshot of August in Seattle. Whether you're a sunshine chaser or a fog fan, Seattle's unique weather in August offers a bit of everything, making it a fabulous time to visit. Cheers to summer adventures! 🌞 Loading weather chart ... Loading weather chart ... Loading weather chart ... Loading weather chart ... Loading weather chart ...

Seattle, United States of America Weather - Weather Averages - Seattle Weather in January - Seattle Weather in February - Seattle Weather in March - Seattle Weather in April - Seattle Weather in May - Seattle Weather in June - Seattle Weather in July - Seattle Weather in August - Seattle Weather in September - Seattle Weather in October - Seattle Weather in November - Seattle Weather in December - Free Weather Widgets - Historical Weather Data Apart from annual averages, the data is also available in hourly interval in CSV format.

Temperature(°C/°F) - Visibility (km or miles) - Pressure (mb or inches) - Cloud (%) - Humidity (%) - Wind Speed (km/h, mph, knots or m/s) - Wind Gust (km/h, mph, knots or m/s) - Snow amount (cm) - Rain amount (mm or inches) - UV Index - Wind direction (degree) - Dew point (°C/°F) - Sky condition description text Historical Weather » | Buy Historical Weather Data » Our users are allowed to export our yearly average charts on this page as png, jpg, pdf or SVG vector image to display on website or for personal and research use.

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Weather In August In Seattle

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