St. Charles, Missouri gets 42 inches of rain, on average, per year. The US average is 38 inches of rain per year.
St. Charles averages 14 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 202 sunny days per year in St. Charles. The US average is 205 sunny days.
St. Charles gets some kind of precipitation, on average, 106 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.
Summer High: the July high is around 88 degrees
Winter Low: the January low is 21
Rain: averages 42 inches of rain a year
Snow: averages 14 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for St. Charles is 7.2 (10=best), which means it is more comfortable than most places in Missouri.
7.2 / 10
September, May and June are the most pleasant months in St. Charles, while January and December are the least comfortable months.