The climate in Chesterfield, Missouri is typically warm and humid throughout the year. Summers are hot with temperatures occasionally reaching into the upper 90s and low 100s while winters are mild with temperatures generally ranging from 30 to 50 degrees Fahrenheit. Rainfall is evenly spread out over the year, making for plenty of wet days throughout the year. The area also experiences occasional thunderstorms and tornadoes during the spring and summer months.
Chesterfield, Missouri gets 43 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Chesterfield averages 13 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 Chesterfield. The US average is 205 sunny days.
Chesterfield gets some kind of precipitation, on average, 103 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 89 degrees
Winter Low: the January low is 21
Rain: averages 43 inches of rain a year
Snow: averages 13 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Chesterfield is 7.2 (10=best), which means it is more comfortable than most places in Missouri.
7.6 / 5.7
Summer / Winter
September, May and June are the most pleasant months in Chesterfield, while January and December are the least comfortable months.