2025 Compare Climate & Weather:
Ballwin, MO vs Louisville, CO

Highlights

On average, there are 242 sunny days per year in Louisville. Ballwin averages 202 sunny days per year. The US average is 205 sunny days.

Louisville, Colorado gets 17.7 inches of rain, on average, per year. Ballwin, Missouri gets 43.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Louisville averages 69.8 inches of snow per year. Ballwin averages 12.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Louisville, Colorado
Summer High: the July high is around 89.1 degrees
Winter Low: the January low is 19.2
Rain: averages 17.7 inches of rain a year
Snow: averages 69.8 inches of snow a year

Ballwin, Missouri
Summer High: the July high is around 88 degrees
Winter Low: the January low is 21.3
Rain: averages 43.9 inches of rain a year
Snow: averages 12.3 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Louisville is 7.2 (10=best), which means it is more comfortable than most places in Colorado.

The annual BestPlaces Comfort Index for Ballwin is 7.2 (10=best), which means it is more comfortable than most places in Missouri.

Today's Weather - Ballwin, MO

63°F

Today's Weather - Louisville, CO

50°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Ballwin / Louisville

July is the hottest month for Ballwin with an average high temperature of 88.0°, which ranks it as about average compared to other places in Missouri. In Ballwin, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Ballwin are September, May and June.

July is the hottest month for Louisville with an average high temperature of 89.1°, which ranks it as warmer than most places in Colorado. In Louisville, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Louisville are September, June and May.

January has the coldest nighttime temperatures for Ballwin with an average of 21.3°. This is warmer than most places in Missouri.

December has the coldest nighttime temperatures for Louisville with an average of 18.5°. This is one of the warmest places in Colorado.

In Ballwin, there are 33.0 days annually when the high temperature is over 90°, which is about average compared to other places in Missouri.

In Louisville, there are 37.5 days annually when the high temperature is over 90°, which is hotter than most places in Colorado.

In Ballwin, there are 101.8 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Missouri.

In Louisville, there are 148.8 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Colorado.

In Ballwin, there are 2.7 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Missouri.

In Louisville, there are 5.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

May is the wettest month in Ballwin with 5.0 inches of rain, and the driest month is January with 2.4 inches. The wettest season is Summer with 28% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 43.9 inches in Ballwin means that it is about average compared to other places in Missouri.


May is the wettest month in Louisville with 2.5 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 37% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 17.7 inches in Louisville means that it is wetter than most places in Colorado.

May is the rainiest month in Ballwin with 11.0 days of rain, and January is the driest month with only 6.8 rainy days. There are 101.1 rainy days annually in Ballwin, which is rainier than most places in Missouri. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 22% chance of a rainy day.

May is the rainiest month in Louisville with 10.5 days of rain, and January is the driest month with only 4.7 rainy days. There are 87.4 rainy days annually in Louisville, which is rainier than most places in Colorado. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 12.3 inches in Ballwin means that it is less snowy than most places in Missouri.

An annual snowfall of 69.8 inches in Louisville means that it is snowier than most places in Colorado.

February is the snowiest month in Ballwin with 3.7 inches of snow, and 5 months of the year have significant snowfall.

March is the snowiest month in Louisville with 13.6 inches of snow, and 9 months of the year have significant snowfall.