2025 Compare Climate & Weather:
Grand Rapids, MI vs Crystal Lake, IL

Highlights

On average, there are 186 sunny days per year in Crystal Lake. Grand Rapids averages 158 sunny days per year. The US average is 205 sunny days.

Crystal Lake, Illinois gets 36.7 inches of rain, on average, per year. Grand Rapids, Michigan gets 37.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Crystal Lake averages 35.1 inches of snow per year. Grand Rapids averages 64.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Crystal Lake, Illinois
Summer High: the July high is around 81.8 degrees
Winter Low: the January low is 12.7
Rain: averages 36.7 inches of rain a year
Snow: averages 35.1 inches of snow a year

Grand Rapids, Michigan
Summer High: the July high is around 82.2 degrees
Winter Low: the January low is 17.6
Rain: averages 37.3 inches of rain a year
Snow: averages 64.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Crystal Lake is 6.8 (10=best), which means it is less comfortable than most places in Illinois.

The annual BestPlaces Comfort Index for Grand Rapids is 6.7 (10=best), which means it is more comfortable than most places in Michigan.

Today's Weather - Grand Rapids, MI

69°F

Today's Weather - Crystal Lake, IL

67°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Grand Rapids / Crystal Lake

July is the hottest month for Grand Rapids with an average high temperature of 82.2°, which ranks it as warmer than most places in Michigan. In Grand Rapids, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Grand Rapids are June, August and July.

July is the hottest month for Crystal Lake with an average high temperature of 81.8°, which ranks it as one of the coolest places in Illinois. In Crystal Lake, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Crystal Lake are June, August and July.

January has the coldest nighttime temperatures for Grand Rapids with an average of 17.6°. This is warmer than most places in Michigan.

January has the coldest nighttime temperatures for Crystal Lake with an average of 12.7°. This is one of the coldest places in Illinois.

In Grand Rapids, there are 6.8 days annually when the high temperature is over 90°, which is hotter than most places in Michigan.

In Crystal Lake, there are 6.9 days annually when the high temperature is over 90°, which is one of the coolest places in Illinois.

In Grand Rapids, there are 133.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Michigan.

In Crystal Lake, there are 138.7 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in Illinois.

In Grand Rapids, there are 4.6 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Michigan.

In Crystal Lake, there are 11.6 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Illinois.

September is the wettest month in Grand Rapids with 4.1 inches of rain, and the driest month is February with 1.9 inches. The wettest season is Winter with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 37.3 inches in Grand Rapids means that it is one of the wettest places in Michigan.


August is the wettest month in Crystal Lake with 4.4 inches of rain, and the driest month is January with 1.7 inches. The wettest season is Autumn with 34% of yearly precipitation and 15% occurs in Spring, which is the driest season. The annual rainfall of 36.7 inches in Crystal Lake means that it is drier than most places in Illinois.

December is the rainiest month in Grand Rapids with 13.5 days of rain, and July is the driest month with only 9.0 rainy days. There are 129.1 rainy days annually in Grand Rapids, which is about average compared to other places in Michigan. The rainiest season is Spring when it rains 29% of the time and the driest is Autumn with only a 21% chance of a rainy day.

May is the rainiest month in Crystal Lake with 11.6 days of rain, and February is the driest month with only 7.6 rainy days. There are 114.2 rainy days annually in Crystal Lake, which is rainier than most places in Illinois. 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.

An annual snowfall of 64.2 inches in Grand Rapids means that it is snowier than most places in Michigan.

An annual snowfall of 35.1 inches in Crystal Lake means that it is one of the snowiest places in Illinois.

January is the snowiest month in Grand Rapids with 18.6 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Crystal Lake with 10.9 inches of snow, and 6 months of the year have significant snowfall.