Tempered by coastal conditions, Anacortes has a relatively mild climate, with a mean average summer temperature of 60 degrees and winter, 42 degrees. The average rainfall in the area is 25 inches. That is approximately 11 inches less than Seattle, and 7 inches less than Mount Vernon, just 20 miles to the east. Snowfall can average from a trace to 6 inches and rarely stays around for more than a few days.