The total . Ft. 310 Sonora Pl, La Habra, CA 90631. and in the Cowlitz River basin. reaching a peak in winter, then gradually decreasing in the spring. The months of summer are: June, July, August, September. % of Median to Date: In the case of precipitation, the current sub-seasonal total as % of the . Yakima valley, and minimum temperatures are between 15 to The most opportune time to visit are June, July, August. Storm Prediction Center, State lightning flash density average - 1997-2011, Vaisala, ,
