2025 Compare Climate & Weather:
Waterloo, IA vs Green Bay, WI

Highlights

On average, there are 187 sunny days per year in Green Bay. Waterloo averages 194 sunny days per year. The US average is 205 sunny days.

Green Bay, Wisconsin gets 30.1 inches of rain, on average, per year. Waterloo, Iowa gets 35.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Green Bay averages 47.5 inches of snow per year. Waterloo averages 33.9 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Green Bay, Wisconsin
Summer High: the July high is around 80.2 degrees
Winter Low: the January low is 8.5
Rain: averages 30.1 inches of rain a year
Snow: averages 47.5 inches of snow a year

Waterloo, Iowa
Summer High: the July high is around 83.4 degrees
Winter Low: the January low is 8.4
Rain: averages 35.7 inches of rain a year
Snow: averages 33.9 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Green Bay is 6.5 (10=best), which means it is less comfortable than most places in Wisconsin.

The annual BestPlaces Comfort Index for Waterloo is 6.7 (10=best), which means it is less comfortable than most places in Iowa.

Today's Weather - Waterloo, IA

71°F

Today's Weather - Green Bay, WI

61°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Waterloo / Green Bay

July is the hottest month for Waterloo with an average high temperature of 83.4°, which ranks it as cooler than most places in Iowa. In Waterloo, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Waterloo are June, August and September.

July is the hottest month for Green Bay with an average high temperature of 80.2°, which ranks it as cooler than most places in Wisconsin. In Green Bay, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Green Bay are August, June and July.

January has the coldest nighttime temperatures for Waterloo with an average of 8.4°. This is colder than most places in Iowa.

January has the coldest nighttime temperatures for Green Bay with an average of 8.5°. This is about average compared to other places in Wisconsin.

In Waterloo, there are 11.5 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Green Bay, there are 3.4 days annually when the high temperature is over 90°, which is cooler than most places in Wisconsin.

In Waterloo, there are 150.4 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Iowa.

In Green Bay, there are 157.0 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Wisconsin.

In Waterloo, there are 21.5 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

In Green Bay, there are 18.8 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.

June is the wettest month in Waterloo with 5.2 inches of rain, and the driest month is January with 0.9 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 35.7 inches in Waterloo means that it is about average compared to other places in Iowa.


June is the wettest month in Green Bay with 3.8 inches of rain, and the driest month is February with 1.1 inches. The wettest season is Autumn with 36% of yearly precipitation and 13% occurs in Spring, which is the driest season. The annual rainfall of 30.1 inches in Green Bay means that it is one of the driest places in Wisconsin.

May is the rainiest month in Waterloo with 11.9 days of rain, and February is the driest month with only 6.5 rainy days. There are 105.3 rainy days annually in Waterloo, 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.

May is the rainiest month in Green Bay with 10.4 days of rain, and February is the driest month with only 7.3 rainy days. There are 111.8 rainy days annually in Green Bay, which is about average compared to other places in Wisconsin. The rainiest season is Summer when it rains 26% of the time and the driest is Spring with only a 22% chance of a rainy day.

An annual snowfall of 33.9 inches in Waterloo means that it is snowier than most places in Iowa.

An annual snowfall of 47.5 inches in Green Bay means that it is snowier than most places in Wisconsin.

December is the snowiest month in Waterloo with 9.6 inches of snow, and 6 months of the year have significant snowfall.

December is the snowiest month in Green Bay with 12.3 inches of snow, and 6 months of the year have significant snowfall.