Estimated reading time: 4 minutes
Key Takeaways
- Seattle’s August 2025 weather is transitioning to cooler and wetter conditions with increased chances of rain amid a warm summer.
- Expected high temperatures around 24°C (75°F), with days of sunshine and light rainfall averaging 31mm over 6 days.
- Thunderstorms and showers will likely arrive in early August, offering a chance to enjoy the sun before the weather shifts.
- Wildfire risks are increasing east of Seattle due to dry conditions, contrasting with the cooling coastal weather.
- Stay updated with local forecasts and pack layers, including a rain jacket, for variable outdoor plans.
Table of Contents
Regional Impacts and Wildfire Concerns
Stay Prepared as Seattle’s Weather Shifts
Seattle Weather in August 2025: What You Need to Know Now
Seattle’s August weather in 2025 is shifting, with recent forecasts signaling a cooling trend and increasing chances of rain amid what has been a mostly warm summer.
Current Weather Overview
August is typically one of Seattle’s warmer months, with average daytime highs around 24°C (75°F) and lows near 13°C (55°F). The city enjoys roughly 9 hours of sunshine daily, making it one of the sunniest times of the year with about 63% of daylight hours bright and clear. Rainfall is usually light, averaging about 31mm spread over 6 days in the month, keeping Seattle comfortably mild without heavy humidity or heat[1], [3].
What’s Changing This Week?
However, the latest reports from early August 2025 indicate incoming thunderstorms and showers that will cool these ideal conditions. Residents and visitors are advised to enjoy the lingering sun before the showers arrive, bringing a noticeable drop in temperatures. This shift is part of a mixed weather pattern linked to the Seafair week festivities, which will see a blend of sun, rain, and cooler skies[1].
Regional Impacts and Wildfire Concerns
Interestingly, while Seattle cools off, the wildfire threat to the east grows due to persistent dry conditions. This contrast highlights the complex Pacific Northwest climate dynamics, where coastal cooling and inland heat coexist simultaneously. Authorities are monitoring wildfire risks closely while preparing for the cooler, wetter weather in urban areas[2].
What Does This Mean for You?
- If you’re in Seattle this weekend: Expect pleasant but variable weather. Pack layers, including a light rain jacket.
- Outdoors plans: Take advantage of the sunshine before thunderstorms potentially disrupt Seafair events.
- Travelers: Check updated weather forecasts frequently — Seattle’s summer weather can pivot quickly in early August.
Long-Term Outlook
Climate models and the Washington State Climate Office forecast warmer and drier than normal conditions generally through August 2025, though short-term weather variability like the current cooling and showers can still occur[4]. Staying informed will provide the best chance to enjoy Seattle’s renowned summer mix of vibrant city life and natural beauty.
Stay Prepared as Seattle’s Weather Shifts
As Seattle’s 2025 summer weather trends toward cooler, wetter days amid occasional sunshine, understanding these changes can help you make the most of your time whether attending events, exploring outdoors, or simply enjoying the city’s unique climate.
For real-time updates, keep an eye on local weather reports and the evolving forecasts from trusted sources. Enjoy the summer sun while it lasts—and be ready for the refreshing showers on the horizon.
FAQ
What is the typical weather in Seattle in August?
August usually features average highs around 24°C (75°F), lows near 13°C (55°F), with about 9 hours of sunshine daily and light rainfall averaging 31mm over 6 days. It is generally one of the sunniest and warmest months of the year, though recent forecasts indicate a cooling trend for 2025[1].
Will there be thunderstorms in August 2025?
Yes, early August 2025 is expected to bring thunderstorms and showers that will bring temporary cooling and impact outdoor plans. Residents are advised to stay updated with local forecasts[1].