2025 Compare Climate & Weather:
Carbondale, IL vs Cairo, IL

Highlights

On average, there are 218 sunny days per year in Cairo. Carbondale averages 216 sunny days per year. The US average is 205 sunny days.

Cairo, Illinois gets 47.7 inches of rain, on average, per year. Carbondale, Illinois gets 45.6 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Cairo averages 6.9 inches of snow per year. Carbondale averages 10.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Cairo, Illinois
Summer High: the July high is around 89.2 degrees
Winter Low: the January low is 25.5
Rain: averages 47.7 inches of rain a year
Snow: averages 6.9 inches of snow a year

Carbondale, Illinois
Summer High: the July high is around 88.6 degrees
Winter Low: the January low is 23.8
Rain: averages 45.6 inches of rain a year
Snow: averages 10.3 inches of snow a year

BestPlaces Comfort Index

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

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

Today's Weather - Carbondale, IL

63°F

Today's Weather - Cairo, IL

65°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Carbondale / Cairo

July is the hottest month for Carbondale with an average high temperature of 88.6°, which ranks it as one of the hottest places in Illinois. In Carbondale, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Carbondale are May, September and June.

July is the hottest month for Cairo with an average high temperature of 89.2°, which ranks it as one of the hottest places in Illinois. In Cairo, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Cairo are May, September and October.

January has the coldest nighttime temperatures for Carbondale with an average of 23.8°. This is one of the warmest places in Illinois.

January has the coldest nighttime temperatures for Cairo with an average of 25.5°. This is one of the warmest places in Illinois.

In Carbondale, there are 35.1 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Cairo, there are 41.9 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Carbondale, there are 94.6 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Cairo, there are 81.1 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Carbondale, there are 1.4 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

In Cairo, there are 1.0 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

May is the wettest month in Carbondale with 5.3 inches of rain, and the driest month is February with 2.8 inches. The wettest season is Summer with 30% of yearly precipitation and 21% occurs in Spring, which is the driest season. The annual rainfall of 45.6 inches in Carbondale means that it is one of the wettest places in Illinois.


May is the wettest month in Cairo with 5.0 inches of rain, and the driest month is August with 2.7 inches. The wettest season is Summer with 29% of yearly precipitation and 23% occurs in Autumn, which is the driest season. The annual rainfall of 47.7 inches in Cairo means that it is one of the wettest places in Illinois.

May is the rainiest month in Carbondale with 11.3 days of rain, and September is the driest month with only 6.6 rainy days. There are 102.3 rainy days annually in Carbondale, which is less rainy than most places in Illinois. The rainiest season is Summer when it rains 30% of the time and the driest is Winter with only a 22% chance of a rainy day.

May is the rainiest month in Cairo with 10.6 days of rain, and August is the driest month with only 6.1 rainy days. There are 103.4 rainy days annually in Cairo, 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 Winter with only a 22% chance of a rainy day.

An annual snowfall of 10.3 inches in Carbondale means that it is one of the least snowy places in Illinois.

An annual snowfall of 6.9 inches in Cairo means that it is one of the least snowy places in Illinois.

December is the snowiest month in Carbondale with 3.2 inches of snow, and 4 months of the year have significant snowfall.

February is the snowiest month in Cairo with 2.6 inches of snow, and 4 months of the year have significant snowfall.