Weather in Mexico's Riviera Nayarit. One of the chief considerations in planning a vacation is the weather, and it is the weather that makes Riviera Nayarit an excellent choice for anyone trying to escape the cold of a northern winter, or the heat of a southern summer.
Asotin County Weather. The average temperature of Asotin County is 49.59Â°F, which is about the same as the Washington average temperature of 50.47Â°F and is lower than the national average temperature of 54.45Â°F. Historical Weather. Heating Cost Index, #24.
1 In September the mean daily temperature range/ variation is 7.4 Â°C (13.3 Â°F). 2  The weather in September is somewhat dry with rain at times. 3  Just 75.5mm (3in) of liquid is released during an average of 10 days.