Whidbey Island residents enjoy mild, short winters and cool comfortable summers.
The Island experiences the moderating effects of the waters of the Puget Sound and the sheltering Olympic and Cascade mountains to provide a mild, temperate climate. Whidbey benefits from the Olympic Mountains' "rain shadow" effect. Rainfall averages from about 35" per year in South Whidbey to less than 18" on Cental Whidbey. Contrast this with the yearly average rainfall of approximately 40" in Everett and Seattle.
Average temperatures range from a January minimum of 34 degrees to an August maximum of 72 degrees. Relative humidity normally ranges from 40% to 90%.
The growing season lasts for 180-220 days. Freezes are usually light and rarely continue past February.