Estimated reading time: 3 minutes
Key Takeaways
- Seattle’s August 2025 forecast features a mix of sunshine, scattered showers, and a cooling trend.
- Expect daily highs around 24°C (75°F) with increasing chances of rain midweek.
- Wildfire risks persist east of the city due to dry conditions, even as local relief occurs.
- Precaution advised for outdoor plans—carry rain jackets and stay updated on wildfire alerts.
- Slightly above-normal temperature trends are forecasted for the Pacific Northwest throughout August.
Table of Contents
Current Forecast and Weather Conditions
Sunshine and Temperature Trends
Upcoming Showers and Thunderstorms
Cooler Skies and Wildfire Concerns
Implications for Residents and Visitors
Typical August Weather in Seattle
Seattle Weather August 2025: What You Need to Know This Week
Seattle is experiencing a mix of typical summer warmth tempered by an emerging cooling trend and scattered showers as of early August 2025. Here’s a clear snapshot of the current forecast and what residents and visitors should expect.
A Bit of Sun Before the Clouds
On summer days, Seattle usually enjoys around 9 hours of sunshine daily with daytime highs averaging about 24°C (75°F) and nighttime lows near 13°C (55°F)[1][3]. Recently, residents have been soaking in pleasant, warm weather perfect for outdoor activities.
Upcoming Showers and Thunderstorms
According to the Seattle Times, showers and thunderstorms may arrive soon, breaking the mostly sunny streak typical for early August. This could bring a welcome cooling effect amid the summer warmth. The forecast during the city’s popular Seafair week signals mixed weather—sunny intervals interrupted by rain or thunderstorms at times[1].
Cooler Skies and Growing Wildfire Concerns
A cooling trend is expected to settle over Seattle over the next several days, which should provide relief from the summer heat. However, this shift accompanies an increased wildfire threat east of the city due to dry conditions in surrounding areas. Residents should stay alert for wildfire updates even as cooler and wetter weather arrives locally[4].
What This Means for You
- Visitors & Outdoor Enthusiasts: Take advantage of the last sun-filled days to enjoy outdoor events like Seafair but prepare for potential showers — a lightweight rain jacket is advisable.
- Wildfire Awareness: While Seattle itself gets relief, eastern Washington’s wildfire risk could impact air quality. Keep informed through local authorities.
- Daily Planning: Temperatures will remain comfortable, hovering around the mid-20s Celsius, but the chance of rain increases midweek.
Context: Typical August Weather in Seattle
August usually presents mild and comfortable weather in Seattle. Historical data reveals:
- Average daily maximum temperature around 24°C (75°F)
- Roughly 6 rainy days per month with an average of 31mm rain total
- High UV levels around 6 to 7, requiring sunscreen even on cloudy days[1][3]
Expert Outlook
Climate models suggest the Pacific Northwest will see slightly warmer and drier than normal conditions through August overall. However, local weather patterns create variability, and this week is a good example with the incoming cooler, wetter trend breaking the heat spike[4].
Stay Updated
Monitoring trusted local weather sources is key in the coming days to navigate the variability, especially during the busy Seafair festivities.
FAQ
What is the expected temperature in Seattle in August 2025?
Temperatures will hover around the mid-20s Celsius (mid-70s Fahrenheit), with highs averaging about 24°C (75°F). The weather remains generally comfortable, with occasional cooler days due to the upcoming cooling trend.
Will there be rain during Seafair week?
Showsers and thunderstorms are possible, with intervals of sunshine. Carry a lightweight rain jacket to stay comfortable during outdoor events.
Should I be concerned about wildfires?
While Seattle itself will see relief from wildfire smoke, dry conditions east of the city pose a wildfire risk. Stay informed via local agencies and avoid outdoor burning when necessary.