Hotter still is the core. In the sun this is thought to be 10 - 20 million degrees. These temperatures are due to the pressure caused by gravity trying to compress the star. It has to be this temperature for fusion of hydrogen to take place.
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).
There is very little rain in this season, with a lot of very hot, dry days expected, and absolutely no fog or snow predicted, so don't expect any freak turns for the worst if you're in Seattle in July. If hot and sunny weather is what you're looking for, Seattle in July is the place to be. The average daily temperature expected in Seattle in this month is 23 C (73 F) , dropping to an average temperature of 13 C (55 F) .