Castle Rock, Colorado gets 19 inches of rain, on average, per year. The US average is 38 inches of rain per year.
Castle Rock averages 78 inches of snow per year. The US average is 28 inches of snow per year.
On average, there are 243 sunny days per year in Castle Rock. The US average is 205 sunny days.
Castle Rock gets some kind of precipitation, on average, 70 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 86 degrees
Winter Low: the January low is 19
Rain: averages 19 inches of rain a year
Snow: averages 78 inches of snow a year
BESTPLACES COMFORT INDEX
The annual BestPlaces Comfort Index for Castle Rock is 7.2 (10=best), which means it is more comfortable than most places in Colorado.
7.2 / 10
August, September and July are the most pleasant months in Castle Rock, while December and January are the least comfortable months.