2025 Compare Climate & Weather:
Broomfield, CO vs Illiopolis, IL

Highlights

On average, there are 194 sunny days per year in Illiopolis. Broomfield averages 248 sunny days per year. The US average is 205 sunny days.

Illiopolis, Illinois gets 38 inches of rain, on average, per year. Broomfield, Colorado gets 16.1 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Illiopolis averages 15.6 inches of snow per year. Broomfield averages 58.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Illiopolis, Illinois
Summer High: the July high is around 86.3 degrees
Winter Low: the January low is 18.6
Rain: averages 38 inches of rain a year
Snow: averages 15.6 inches of snow a year

Broomfield, Colorado
Summer High: the July high is around 89.6 degrees
Winter Low: the January low is 17.7
Rain: averages 16.1 inches of rain a year
Snow: averages 58.6 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Illiopolis is 7.2 (10=best), which means it is one of the most pleasant places in Illinois.

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

Today's Weather - Broomfield, CO

61°F

Today's Weather - Illiopolis, IL

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Broomfield / Illiopolis

July is the hottest month for Broomfield with an average high temperature of 89.6°, which ranks it as warmer than most places in Colorado. In Broomfield, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Broomfield are September, June and May.

July is the hottest month for Illiopolis with an average high temperature of 86.3°, which ranks it as warmer than most places in Illinois. In Illiopolis, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Illiopolis are September, May and June.

December has the coldest nighttime temperatures for Broomfield with an average of 17.1°. This is warmer than most places in Colorado.

January has the coldest nighttime temperatures for Illiopolis with an average of 18.6°. This is warmer than most places in Illinois.

In Broomfield, there are 39.2 days annually when the high temperature is over 90°, which is hotter than most places in Colorado.

In Illiopolis, there are 22.8 days annually when the high temperature is over 90°, which is hotter than most places in Illinois.

In Broomfield, there are 156.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Colorado.

In Illiopolis, there are 114.1 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Broomfield, there are 5.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Colorado.

In Illiopolis, there are 5.0 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

May is the wettest month in Broomfield with 2.4 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Summer with 35% of yearly precipitation and 11% occurs in Spring, which is the driest season. The annual rainfall of 16.1 inches in Broomfield means that it is about average compared to other places in Colorado.


July is the wettest month in Illiopolis with 4.3 inches of rain, and the driest month is January with 1.9 inches. The wettest season is Autumn with 32% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.0 inches in Illiopolis means that it is drier than most places in Illinois.

May is the rainiest month in Broomfield with 10.0 days of rain, and January is the driest month with only 4.6 rainy days. There are 82.5 rainy days annually in Broomfield, which is about average compared to other places in Colorado. The rainiest season is Summer when it rains 31% of the time and the driest is Spring with only a 18% chance of a rainy day.

May is the rainiest month in Illiopolis with 10.7 days of rain, and September is the driest month with only 6.8 rainy days. There are 101.4 rainy days annually in Illiopolis, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 29% of the time and the driest is Spring with only a 23% chance of a rainy day.

An annual snowfall of 58.6 inches in Broomfield means that it is about average compared to other places in Colorado.

An annual snowfall of 15.6 inches in Illiopolis means that it is less snowy than most places in Illinois.

March is the snowiest month in Broomfield with 11.3 inches of snow, and 9 months of the year have significant snowfall.

February is the snowiest month in Illiopolis with 4.6 inches of snow, and 4 months of the year have significant snowfall.