Temperatures rose to 90 degrees in Washington Tuesday. The high temperature fell short of the record high by 10 degrees, which was set in 1899. According to the National Weather Service the average temperature for the first week of September was 68.3 degrees, slightly below the normal 68.6 degrees. Temperatures are expected to drop as the week continues. Thunderstorms are expected with up to three inches of rain in Washington by Friday evening. Listen to KCII for weather updates.