2025 Compare Climate & Weather:
Monument, CO vs Castle Rock, CO

Highlights

On average, there are 243 sunny days per year in Castle Rock. Monument averages 250 sunny days per year. The US average is 205 sunny days.

Castle Rock, Colorado gets 18.6 inches of rain, on average, per year. Monument, Colorado gets 20.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Castle Rock averages 78.3 inches of snow per year. Monument averages 95.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Castle Rock, Colorado
Summer High: the July high is around 85.5 degrees
Winter Low: the January low is 18.6
Rain: averages 18.6 inches of rain a year
Snow: averages 78.3 inches of snow a year

Monument, Colorado
Summer High: the July high is around 82.8 degrees
Winter Low: the January low is 15.5
Rain: averages 20.7 inches of rain a year
Snow: averages 95.6 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.

The annual BestPlaces Comfort Index for Monument is 6.8 (10=best), which means it is less comfortable than most places in Colorado.

Today's Weather - Monument, CO

48°F

Today's Weather - Castle Rock, CO

51°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Monument / Castle Rock

July is the hottest month for Monument with an average high temperature of 82.8°, which ranks it as cooler than most places in Colorado. In Monument, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Monument are June, August and July.

July is the hottest month for Castle Rock with an average high temperature of 85.5°, which ranks it as about average compared to other places in Colorado. In Castle Rock, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Castle Rock are June, September and August.

December has the coldest nighttime temperatures for Monument with an average of 15.3°. This is about average compared to other places in Colorado.

December has the coldest nighttime temperatures for Castle Rock with an average of 18.1°. This is one of the warmest places in Colorado.

In Monument, there are 7.4 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

In Castle Rock, there are 14.9 days annually when the high temperature is over 90°, which is cooler than most places in Colorado.

In Monument, there are 176.8 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Colorado.

In Castle Rock, there are 156.4 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In Monument, there are 8.1 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Colorado.

In Castle Rock, there are 5.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

August is the wettest month in Monument with 3.3 inches of rain, and the driest month is February with 0.5 inches. The wettest season is Autumn with 41% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 20.7 inches in Monument means that it is one of the wettest places in Colorado.


August is the wettest month in Castle Rock with 2.6 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 40% of yearly precipitation and 10% occurs in Spring, which is the driest season. The annual rainfall of 18.6 inches in Castle Rock means that it is wetter than most places in Colorado.

August is the rainiest month in Monument with 13.3 days of rain, and October is the driest month with only 4.9 rainy days. There are 95.5 rainy days annually in Monument, which is rainier than most places in Colorado. The rainiest season is Autumn when it rains 36% of the time and the driest is Spring with only a 17% chance of a rainy day.

August is the rainiest month in Castle Rock with 9.9 days of rain, and January is the driest month with only 3.3 rainy days. There are 70.0 rainy days annually in Castle Rock, which is less rainy than most places in Colorado. The rainiest season is Autumn when it rains 37% of the time and the driest is Spring with only a 15% chance of a rainy day.

An annual snowfall of 95.6 inches in Monument means that it is snowier than most places in Colorado.

An annual snowfall of 78.3 inches in Castle Rock means that it is snowier than most places in Colorado.

March is the snowiest month in Monument with 19.7 inches of snow, and 9 months of the year have significant snowfall.

March is the snowiest month in Castle Rock with 16.8 inches of snow, and 9 months of the year have significant snowfall.