Emerald winters, brown summers
How dry it is! Understanding the summer climate west of the Cascades baffles lots of residents. The “emerald green” attitude extends to believing that summer months wrap themselves in rain and mist just as winter does. However, our “modified Mediterranean” climate makes water planning as important in Seattle as it is in Spokane.
Summer of 2002 brought only 4.6 inches of rain at Sea-Tac (May 1 through November 1). September and October, usually good planting months, totaled only 1.08 inches combined. Another way to get perspective on this summer rainfall total-just imagine you’ve planted hybrid rhododendrons in April. They require about an inch per week, … » More …