The coolest stars are the red dwarfs/red giants, with surface temperatures of 3,500 Kelvin or less. As the surface temperature gets hotter, the color of the star turns orange, and then yellow-orange, and then yellow, yellow-white, and then around 5,800 Kelvin it appears white.
In most years, Seattle averages a daily maximum temperature for September that's between 69 and 73 degrees Fahrenheit (20 to 23 degrees Celsius). The minimum temperature usually falls between 52 and 55 Â°F (11 to 13 Â°C). The days at Seattle begin to cool down quickly during September.
1 In spring time temperatures climb reaching 14.8Â°C (58.7Â°F) generally in the afternoon with overnight lows of 6.3Â°C (43.3Â°F). 2  During summer average high temperatures are 22.6Â°C (72.6Â°F) and average low temperatures are 13.1Â°C (55.6Â°F).eattle, Washington Climate & Temperature. 1  Seattle, Washington, Usa is at 47 36'N, 122 19'W, 60 m (197 ft).