St. Peters, MO has a humid subtropical climate with hot and humid summers, cold winters, and moderate amounts of precipitation throughout the year. The city experiences four distinct seasons with varying temperatures and precipitation levels depending on the time of year. Summers are typically sunny and hot with temperatures reaching the high 80s and low 90s, while winters are much colder with lows around 20 degrees Fahrenheit. Rainfall averages approximately 40 inches annually, with snowfall averaging around 15 inches per year. The area also experiences some variants in climate from storms that can bring heavy rain or snow at times in spring and winter months.
St. Peters, Missouri gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
St. Peters averages 13 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 201 sunny days per year in St. Peters. The US average is 205 sunny days.
St. Peters gets some kind of precipitation, on average, 104 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 88 degrees
Winter Low: the January low is 21
Rain: averages 43 inches of rain a year
Snow: averages 13 inches of snow a year