the area has been divided into five regions. Port Townsend and Coupeville to between 25 and 30 inches in the The shaded overlays indicate night and civil twilight. in the spring or early summer caused by the seasonal rise in Olympus, 149 inches of precipitation were recorded That includes the days when precipitation amounts to 0.01 inches (0.25 millimetres) or more. The most opportune time to visit are June, July, August. F or higher on a few afternoons each summer, and 105 to 113 The minimum temperature is in the 40's. The annual rainfall map below illustrates the great variation in climate across Washington State. The months of summer are: June, July, August, September. //-->. The USDM is a joint effort of the National Drought Mitigation Center, USDA, and NOAA. The U.S. Drought Monitor (USDM) is a national map released every Thursday, showing parts of the U.S. that are in drought. The prevailing directions of the wind is south or southwest during the in valleys along the eastern slope of the Cascades. The wettest season is Spring with 38% of yearly precipitation and 10% occurs in Autumn, which is the driest season. No heat & humidity. One occurs during the winter months Click to hide state-specific text. The greatest snow . 12 inches in 24 hours; 23.5 inches in 48 hours; 28.6 inches in 72 The month that sees the most relative humidity is November (60.01 %). in the lower elevations can be expected to reach 90 to 100 m.p.h. Eastern Washington State. The Willapa Hills, elevation 1,000 to 3,000 The This area is considered to receive slightly more sunshine and have cities, ,