Washington, MO has a humid continental climate with warm summers and cold winters. Summers in Washington are usually hot and muggy, with temperatures staying around 80 degrees Fahrenheit during the day and dropping to around 60 degrees at night. Winters, on the other hand, can be quite cold with temperatures often dropping below freezing at night and rarely rising above 45 degrees Fahrenheit during the day. Rainfall is fairly regular throughout the year, though it is more likely to occur in April-June and September-November than during the summer months.
Washington, Missouri gets 44 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Washington averages 12 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 204 sunny days per year in Washington. The US average is 205 sunny days.
Washington gets some kind of precipitation, on average, 107 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.
Weather Highlights
Summer High: the July high is around 89 degrees
Winter Low: the January low is 22
Rain: averages 44 inches of rain a year
Snow: averages 12 inches of snow a year