And Still Be Close To Your Neighbors. Walking through the University of Dayton's campus, you're not the only one who feels right at home: approximately 90 percent of our undergrads live on campus or in the student neighborhood. You'll appreciate your new home almost as much as the view.
Average Weather in September in Seattle Washington, United States. In Seattle, the month of September is characterized by falling daily high temperatures, with daily highs decreasing by 8Â°F, from 75Â°F to 67Â°F over the course of the month, and rarely exceeding 83Â°F or dropping below 60Â°F.
The highest daily average low temperature is 59Â°F on August 2. For reference, on August 1, the hottest day of the year, temperatures in Seattle typically range from 59Â°F to 79Â°F, while on December 23, the coldest day of the year, they range from 37Â°F to 46Â°F.