2025 Compare Climate & Weather:
Plymouth, MN vs Sioux Falls, SD

Highlights

On average, there are 211 sunny days per year in Sioux Falls. Plymouth averages 197 sunny days per year. The US average is 205 sunny days.

Sioux Falls, South Dakota gets 26.7 inches of rain, on average, per year. Plymouth, Minnesota gets 31.7 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Sioux Falls averages 37.6 inches of snow per year. Plymouth averages 51.5 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Sioux Falls, South Dakota
Summer High: the July high is around 83.5 degrees
Winter Low: the January low is 6.3
Rain: averages 26.7 inches of rain a year
Snow: averages 37.6 inches of snow a year

Plymouth, Minnesota
Summer High: the July high is around 83 degrees
Winter Low: the January low is 6.1
Rain: averages 31.7 inches of rain a year
Snow: averages 51.5 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Sioux Falls is 6.8 (10=best), which means it is about average compared to other places in South Dakota.

The annual BestPlaces Comfort Index for Plymouth is 6.6 (10=best), which means it is more comfortable than most places in Minnesota.

Today's Weather - Plymouth, MN

51°F

Today's Weather - Sioux Falls, SD

53°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Plymouth / Sioux Falls

July is the hottest month for Plymouth with an average high temperature of 83.0°, which ranks it as warmer than most places in Minnesota. In Plymouth, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Plymouth are June, August and July.

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

January has the coldest nighttime temperatures for Plymouth with an average of 6.1°. This is one of the warmest places in Minnesota.

January has the coldest nighttime temperatures for Sioux Falls with an average of 6.3°. This is about average compared to other places in South Dakota.

In Plymouth, there are 9.3 days annually when the high temperature is over 90°, which is hotter than most places in Minnesota.

In Sioux Falls, there are 11.2 days annually when the high temperature is over 90°, which is cooler than most places in South Dakota.

In Plymouth, there are 152.7 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in Minnesota.

In Sioux Falls, there are 161.6 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.

In Plymouth, there are 23.9 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in Minnesota.

In Sioux Falls, there are 26.3 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in South Dakota.

June is the wettest month in Plymouth with 4.5 inches of rain, and the driest month is February with 0.7 inches. The wettest season is Autumn with 40% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 31.7 inches in Plymouth means that it is wetter than most places in Minnesota.


June is the wettest month in Sioux Falls with 4.0 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 38% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 26.7 inches in Sioux Falls means that it is wetter than most places in South Dakota.

June is the rainiest month in Plymouth with 12.1 days of rain, and February is the driest month with only 6.5 rainy days. There are 110.8 rainy days annually in Plymouth, which is rainier than most places in Minnesota. The rainiest season is Autumn when it rains 28% of the time and the driest is Spring with only a 21% chance of a rainy day.

May is the rainiest month in Sioux Falls with 10.8 days of rain, and February is the driest month with only 5.1 rainy days. There are 90.1 rainy days annually in Sioux Falls, which is one of the rainiest places in South Dakota. The rainiest season is Autumn when it rains 30% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 51.5 inches in Plymouth means that it is snowier than most places in Minnesota.

An annual snowfall of 37.6 inches in Sioux Falls means that it is about average compared to other places in South Dakota.

December is the snowiest month in Plymouth with 12.4 inches of snow, and 7 months of the year have significant snowfall.

December is the snowiest month in Sioux Falls with 7.0 inches of snow, and 7 months of the year have significant snowfall.