2025 Compare Climate & Weather:
Mankato, MN vs Rapid Valley, SD

Highlights

On average, there are 223 sunny days per year in Rapid Valley. Mankato averages 193 sunny days per year. The US average is 205 sunny days.

Rapid Valley, South Dakota gets 18.1 inches of rain, on average, per year. Mankato, Minnesota gets 31.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Rapid Valley averages 39.5 inches of snow per year. Mankato averages 42.6 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Rapid Valley, South Dakota
Summer High: the July high is around 85.4 degrees
Winter Low: the January low is 14.1
Rain: averages 18.1 inches of rain a year
Snow: averages 39.5 inches of snow a year

Mankato, Minnesota
Summer High: the July high is around 83.5 degrees
Winter Low: the January low is 5.1
Rain: averages 31.7 inches of rain a year
Snow: averages 42.6 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Rapid Valley is 7.0 (10=best), which means it is one of the most pleasant places in South Dakota.

The annual BestPlaces Comfort Index for Mankato is 6.7 (10=best), which means it is one of the most pleasant places in Minnesota.

Today's Weather - Mankato, MN

69°F

Today's Weather - Rapid Valley, SD

65°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Mankato / Rapid Valley

July is the hottest month for Mankato with an average high temperature of 83.5°, which ranks it as one of the hottest places in Minnesota. In Mankato, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mankato are June, August and September.

July is the hottest month for Rapid Valley with an average high temperature of 85.4°, which ranks it as about average compared to other places in South Dakota. In Rapid Valley, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Rapid Valley are June, September and August.

January has the coldest nighttime temperatures for Mankato with an average of 5.1°. This is warmer than most places in Minnesota.

January has the coldest nighttime temperatures for Rapid Valley with an average of 14.1°. This is one of the warmest places in South Dakota.

In Mankato, there are 13.0 days annually when the high temperature is over 90°, which is one of the hottest places in Minnesota.

In Rapid Valley, there are 23.2 days annually when the high temperature is over 90°, which is hotter than most places in South Dakota.

In Mankato, there are 159.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Minnesota.

In Rapid Valley, there are 160.0 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.

In Mankato, there are 28.0 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Minnesota.

In Rapid Valley, there are 15.0 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in South Dakota.

June is the wettest month in Mankato with 4.8 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 42% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 31.7 inches in Mankato means that it is wetter than most places in Minnesota.


May is the wettest month in Rapid Valley with 3.7 inches of rain, and the driest month is January with 0.3 inches. The wettest season is Autumn with 39% of yearly precipitation and 6% occurs in Spring, which is the driest season. The annual rainfall of 18.1 inches in Rapid Valley means that it is drier than most places in South Dakota.

June is the rainiest month in Mankato with 10.8 days of rain, and February is the driest month with only 4.5 rainy days. There are 92.6 rainy days annually in Mankato, which is less rainy than most places in Minnesota. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 18% chance of a rainy day.

June is the rainiest month in Rapid Valley with 12.0 days of rain, and November is the driest month with only 4.3 rainy days. There are 88.8 rainy days annually in Rapid Valley, which is one of the rainiest places in South Dakota. The rainiest season is Autumn when it rains 33% of the time and the driest is Spring with only a 16% chance of a rainy day.

An annual snowfall of 42.6 inches in Mankato means that it is less snowy than most places in Minnesota.

An annual snowfall of 39.5 inches in Rapid Valley means that it is snowier than most places in South Dakota.

December is the snowiest month in Mankato with 10.1 inches of snow, and 6 months of the year have significant snowfall.

March is the snowiest month in Rapid Valley with 8.9 inches of snow, and 8 months of the year have significant snowfall.