2025 Compare Climate & Weather:
Waterloo, IA vs Hartford, CT

Highlights

On average, there are 189 sunny days per year in Hartford. Waterloo averages 194 sunny days per year. The US average is 205 sunny days.

Hartford, Connecticut gets 49.2 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.

Hartford averages 37.9 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

Hartford, Connecticut
Summer High: the July high is around 84 degrees
Winter Low: the January low is 17.8
Rain: averages 49.2 inches of rain a year
Snow: averages 37.9 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 Hartford is 7.0 (10=best), which means it is about average compared to other places in Connecticut.

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

51°F

Today's Weather - Hartford, CT

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Waterloo / Hartford

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 Hartford with an average high temperature of 84.0°, which ranks it as warmer than most places in Connecticut. In Hartford, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Hartford are June, September and August.

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 Hartford with an average of 17.8°. This is about average compared to other places in Connecticut.

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

In Hartford, there are 12.1 days annually when the high temperature is over 90°, which is one of the hottest places in Connecticut.

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 Hartford, there are 124.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Connecticut.

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 Hartford, there are 2.6 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Connecticut.

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.


October is the wettest month in Hartford with 4.8 inches of rain, and the driest month is February with 3.1 inches. The wettest season is Autumn with 27% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 49.2 inches in Hartford means that it is drier than most places in Connecticut.

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 Hartford with 11.8 days of rain, and February is the driest month with only 9.1 rainy days. There are 119.7 rainy days annually in Hartford, which is about average compared to other places in Connecticut. The rainiest season is Summer when it rains 27% of the time and the driest is Winter with only a 24% 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 37.9 inches in Hartford means that it is snowier than most places in Connecticut.

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

January is the snowiest month in Hartford with 11.6 inches of snow, and 6 months of the year have significant snowfall.