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.
Sweltering weather is a rarity in Seattle. The city averages only two days a year of temperatures in the 90s Fahrenheit and normally doesn t get any hotter than 100. Nights are equally moderate with minimum temperatures dropping below 70 Â°F. Just ten times a year, on average does the daily low remain in the 60s.