2025 Compare Climate & Weather:
River Forest, IL vs Indianapolis, IN

Highlights

On average, there are 186 sunny days per year in Indianapolis. River Forest averages 189 sunny days per year. The US average is 205 sunny days.

Indianapolis, Indiana gets 42.4 inches of rain, on average, per year. River Forest, Illinois gets 38.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Indianapolis averages 21.6 inches of snow per year. River Forest averages 37.2 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Indianapolis, Indiana
Summer High: the July high is around 84 degrees
Winter Low: the January low is 19.5
Rain: averages 42.4 inches of rain a year
Snow: averages 21.6 inches of snow a year

River Forest, Illinois
Summer High: the July high is around 83.9 degrees
Winter Low: the January low is 18.2
Rain: averages 38.3 inches of rain a year
Snow: averages 37.2 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Indianapolis is 7.0 (10=best), which means it is about average compared to other places in Indiana.

The annual BestPlaces Comfort Index for River Forest is 6.9 (10=best), which means it is less comfortable than most places in Illinois.

Today's Weather - River Forest, IL

49°F

Today's Weather - Indianapolis, IN

57°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: River Forest / Indianapolis

July is the hottest month for River Forest with an average high temperature of 83.9°, which ranks it as cooler than most places in Illinois. In River Forest, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for River Forest are June, September and August.

July is the hottest month for Indianapolis with an average high temperature of 84.0°, which ranks it as about average compared to other places in Indiana. In Indianapolis, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Indianapolis are September, June and August.

January has the coldest nighttime temperatures for River Forest with an average of 18.2°. This is warmer than most places in Illinois.

January has the coldest nighttime temperatures for Indianapolis with an average of 19.5°. This is warmer than most places in Indiana.

In River Forest, there are 12.4 days annually when the high temperature is over 90°, which is cooler than most places in Illinois.

In Indianapolis, there are 11.3 days annually when the high temperature is over 90°, which is cooler than most places in Indiana.

In River Forest, there are 110.7 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Illinois.

In Indianapolis, there are 110.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Indiana.

In River Forest, there are 4.7 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Illinois.

In Indianapolis, there are 4.5 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Indiana.

August is the wettest month in River Forest with 4.5 inches of rain, and the driest month is January with 1.9 inches. The wettest season is Autumn with 31% of yearly precipitation and 16% occurs in Spring, which is the driest season. The annual rainfall of 38.3 inches in River Forest means that it is drier than most places in Illinois.


May is the wettest month in Indianapolis with 5.1 inches of rain, and the driest month is February with 2.3 inches. The wettest season is Summer with 29% of yearly precipitation and 19% occurs in Spring, which is the driest season. The annual rainfall of 42.4 inches in Indianapolis means that it is about average compared to other places in Indiana.

April is the rainiest month in River Forest with 11.7 days of rain, and February is the driest month with only 8.6 rainy days. There are 125.1 rainy days annually in River Forest, which is one of the rainiest places in Illinois. The rainiest season is Summer when it rains 27% of the time and the driest is Autumn with only a 24% chance of a rainy day.

May is the rainiest month in Indianapolis with 12.8 days of rain, and September is the driest month with only 7.8 rainy days. There are 122.1 rainy days annually in Indianapolis, which is rainier than most places in Indiana. 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 37.2 inches in River Forest means that it is one of the snowiest places in Illinois.

An annual snowfall of 21.6 inches in Indianapolis means that it is about average compared to other places in Indiana.

January is the snowiest month in River Forest with 11.4 inches of snow, and 6 months of the year have significant snowfall.

January is the snowiest month in Indianapolis with 6.7 inches of snow, and 4 months of the year have significant snowfall.