The Sequim Weather Report
The Blue Hole
The Rain Shadow
The Sequim Blue Hole, or the Sequim Rain Shadow as some call it, is real and here is the proof. This map shows that Sequim gets an average of 16 inches of rain annually, and in an uneven set of concentric circles extending out from Sequim, the rainfall increases dramatically into the Olympic Mountains to the south until the rainfall reaches 200 inches annually.