2025 Compare Climate & Weather:
Janesville, WI vs Des Moines, IA

Highlights

On average, there are 204 sunny days per year in Des Moines. Janesville averages 185 sunny days per year. The US average is 205 sunny days.

Des Moines, Iowa gets 35.9 inches of rain, on average, per year. Janesville, Wisconsin gets 35.5 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Des Moines averages 32.9 inches of snow per year. Janesville averages 34.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Des Moines, Iowa
Summer High: the July high is around 85.6 degrees
Winter Low: the January low is 12.5
Rain: averages 35.9 inches of rain a year
Snow: averages 32.9 inches of snow a year

Janesville, Wisconsin
Summer High: the July high is around 82.9 degrees
Winter Low: the January low is 11.2
Rain: averages 35.5 inches of rain a year
Snow: averages 34.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Des Moines is 6.9 (10=best), which means it is more comfortable than most places in Iowa.

The annual BestPlaces Comfort Index for Janesville is 6.8 (10=best), which means it is one of the most pleasant places in Wisconsin.

Today's Weather - Janesville, WI

65°F

Today's Weather - Des Moines, IA

70°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Janesville / Des Moines

July is the hottest month for Janesville with an average high temperature of 82.9°, which ranks it as warmer than most places in Wisconsin. In Janesville, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Janesville are June, August and September.

July is the hottest month for Des Moines with an average high temperature of 85.6°, which ranks it as warmer than most places in Iowa. In Des Moines, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Des Moines are September, June and May.

January has the coldest nighttime temperatures for Janesville with an average of 11.2°. This is warmer than most places in Wisconsin.

January has the coldest nighttime temperatures for Des Moines with an average of 12.5°. This is warmer than most places in Iowa.

In Janesville, there are 8.7 days annually when the high temperature is over 90°, which is hotter than most places in Wisconsin.

In Des Moines, there are 18.8 days annually when the high temperature is over 90°, which is hotter than most places in Iowa.

In Janesville, there are 144.5 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Wisconsin.

In Des Moines, there are 135.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Iowa.

In Janesville, there are 15.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.

In Des Moines, there are 13.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Iowa.

August is the wettest month in Janesville with 4.4 inches of rain, and the driest month is January with 1.3 inches. The wettest season is Autumn with 35% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 35.5 inches in Janesville means that it is wetter than most places in Wisconsin.


June is the wettest month in Des Moines with 5.1 inches of rain, and the driest month is January with 1.0 inches. The wettest season is Autumn with 39% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 35.9 inches in Des Moines means that it is about average compared to other places in Iowa.

May is the rainiest month in Janesville with 11.7 days of rain, and February is the driest month with only 7.5 rainy days. There are 116.3 rainy days annually in Janesville, which is rainier than most places in Wisconsin. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 23% chance of a rainy day.

May is the rainiest month in Des Moines with 12.3 days of rain, and January is the driest month with only 6.8 rainy days. There are 107.6 rainy days annually in Des Moines, which is rainier than most places in Iowa. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 20% chance of a rainy day.

An annual snowfall of 34.2 inches in Janesville means that it is one of the least snowy places in Wisconsin.

An annual snowfall of 32.9 inches in Des Moines means that it is snowier than most places in Iowa.

January is the snowiest month in Janesville with 10.2 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Des Moines with 8.2 inches of snow, and 6 months of the year have significant snowfall.