Seattle Weather In December 2024. *1 *2 *3 *4 *5 *6 *7 *8 *9 *10 *11 *12 *13 *14 *15 *16 *17 *18 *19 *20 *21 *22 *23 *24 *25 *26 *27 *28 *29 *30 *31. Weather + sunrise/sunset times cloudy, showery, breezy, high in the upper 40s.
The lowest daily average low temperature is 37°f on december 22. Weather + sunrise/sunset times cloudy, showery, breezy, high in the upper 40s.
