2025 Compare Climate & Weather:
Indianola, WA vs Alton, IL

Highlights

On average, there are 200 sunny days per year in Alton. Indianola averages 152 sunny days per year. The US average is 205 sunny days.

Alton, Illinois gets 41.7 inches of rain, on average, per year. Indianola, Washington gets 41.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Alton averages 15.5 inches of snow per year. Indianola averages 3.1 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Alton, Illinois
Summer High: the July high is around 88.7 degrees
Winter Low: the January low is 22.7
Rain: averages 41.7 inches of rain a year
Snow: averages 15.5 inches of snow a year

Indianola, Washington
Summer High: the July high is around 76.2 degrees
Winter Low: the January low is 35.5
Rain: averages 41.7 inches of rain a year
Snow: averages 3.1 inches of snow a year

BestPlaces Comfort Index

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

The annual BestPlaces Comfort Index for Indianola is 7.3 (10=best), which means it is more comfortable than most places in Washington.

Today's Weather - Indianola, WA

60°F

Today's Weather - Alton, IL

68°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Indianola / Alton

August is the hottest month for Indianola with an average high temperature of 76.9°, which ranks it as about average compared to other places in Washington. In Indianola, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Indianola are August, July and September.

July is the hottest month for Alton with an average high temperature of 88.7°, which ranks it as one of the hottest places in Illinois. In Alton, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Alton are May, September and June.

December has the coldest nighttime temperatures for Indianola with an average of 34.6°. This is warmer than most places in Washington.

January has the coldest nighttime temperatures for Alton with an average of 22.7°. This is one of the warmest places in Illinois.

In Indianola, there are 2.8 days annually when the high temperature is over 90°, which is cooler than most places in Washington.

In Alton, there are 37.1 days annually when the high temperature is over 90°, which is one of the hottest places in Illinois.

In Indianola, there are 38.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Washington.

In Alton, there are 87.9 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Illinois.

In Indianola, there are 0.0 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in Washington.

In Alton, there are 1.7 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Illinois.

December is the wettest month in Indianola with 6.9 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 41% of yearly precipitation and 8% occurs in Autumn, which is the driest season. The annual rainfall of 41.7 inches in Indianola means that it is about average compared to other places in Washington.


May is the wettest month in Alton with 5.0 inches of rain, and the driest month is January with 2.4 inches. The wettest season is Summer with 29% of yearly precipitation and 18% occurs in Spring, which is the driest season. The annual rainfall of 41.7 inches in Alton means that it is wetter than most places in Illinois.

November is the rainiest month in Indianola with 18.5 days of rain, and August is the driest month with only 5.6 rainy days. There are 156.1 rainy days annually in Indianola, which is about average compared to other places in Washington. The rainiest season is Spring when it rains 32% of the time and the driest is Autumn with only a 14% chance of a rainy day.

May is the rainiest month in Alton with 11.3 days of rain, and September is the driest month with only 7.0 rainy days. There are 104.2 rainy days annually in Alton, 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 Spring with only a 22% chance of a rainy day.

An annual snowfall of 3.1 inches in Indianola means that it is less snowy than most places in Washington.

An annual snowfall of 15.5 inches in Alton means that it is less snowy than most places in Illinois.

December is the snowiest month in Indianola with 1.5 inches of snow, and 4 months of the year have significant snowfall.

January is the snowiest month in Alton with 4.8 inches of snow, and 5 months of the year have significant snowfall.