average temperature at whitman washington
Temperatures. The average July temperature in Whitman County is 84 degrees, while the national average for the same month is 86.5 degrees. In the month of January, when the rest of the country averages a low of 20.5 degrees, Whitman County residents experience an average low of 22.6 degrees.nnual rainfall throughout the United States is 36.5 inches, and average snowfall is 25 inches. December is the most precipitous month of the year in Whitman County, with an average of 2.3 inches, most of which is snow. August is the driest month of the year, seeing just 0.7 inches of measurable precipitation.