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.
60 Â°F min. or less (16 Â°C). Usually every day in August the temperature rises to over 60 Â°F (16 Â°C) at Seattle. The city averages 9 days this month when the thermometer reaches into the 80s Â°F (over 27 Â°C). Temperatures of 90 Â°F (32 Â°C) or above don't occur here every year during August.