2025 Compare Climate & Weather:
Custer, SD vs Alcester, SD

Highlights

On average, there are 211 sunny days per year in Alcester. Custer averages 226 sunny days per year. The US average is 205 sunny days.

Alcester, South Dakota gets 28.4 inches of rain, on average, per year. Custer, South Dakota gets 19.9 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Alcester averages 29.9 inches of snow per year. Custer averages 55.3 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Alcester, South Dakota
Summer High: the July high is around 84.3 degrees
Winter Low: the January low is 6.9
Rain: averages 28.4 inches of rain a year
Snow: averages 29.9 inches of snow a year

Custer, South Dakota
Summer High: the July high is around 79.5 degrees
Winter Low: the January low is 15.5
Rain: averages 19.9 inches of rain a year
Snow: averages 55.3 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Alcester is 6.9 (10=best), which means it is more comfortable than most places in South Dakota.

The annual BestPlaces Comfort Index for Custer is 6.7 (10=best), which means it is less comfortable than most places in South Dakota.

Today's Weather - Custer, SD

53°F

Today's Weather - Alcester, SD

61°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Custer / Alcester

July is the hottest month for Custer with an average high temperature of 79.5°, which ranks it as one of the coolest places in South Dakota. In Custer, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Custer are August, July and June.

July is the hottest month for Alcester with an average high temperature of 84.3°, which ranks it as about average compared to other places in South Dakota. In Alcester, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Alcester are June, September and August.

December has the coldest nighttime temperatures for Custer with an average of 15.2°. This is one of the warmest places in South Dakota.

January has the coldest nighttime temperatures for Alcester with an average of 6.9°. This is about average compared to other places in South Dakota.

In Custer, there are 4.7 days annually when the high temperature is over 90°, which is one of the coolest places in South Dakota.

In Alcester, there are 15.3 days annually when the high temperature is over 90°, which is about average compared to other places in South Dakota.

In Custer, there are 177.0 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in South Dakota.

In Alcester, there are 160.9 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.

In Custer, there are 12.6 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in South Dakota.

In Alcester, there are 24.8 days annually when the nighttime low temperature falls below zero°, which is about average compared to other places in South Dakota.

May is the wettest month in Custer with 3.6 inches of rain, and the driest month is January with 0.3 inches. The wettest season is Autumn with 40% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 19.9 inches in Custer means that it is drier than most places in South Dakota.


June is the wettest month in Alcester with 4.3 inches of rain, and the driest month is February with 0.6 inches. The wettest season is Autumn with 38% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 28.4 inches in Alcester means that it is one of the wettest places in South Dakota.

May is the rainiest month in Custer with 12.8 days of rain, and January is the driest month with only 3.9 rainy days. There are 93.0 rainy days annually in Custer, which is one of the rainiest places in South Dakota. The rainiest season is Autumn when it rains 36% of the time and the driest is Spring with only a 14% chance of a rainy day.

May is the rainiest month in Alcester with 11.2 days of rain, and February is the driest month with only 4.1 rainy days. There are 87.0 rainy days annually in Alcester, which is rainier than most places in South Dakota. The rainiest season is Autumn when it rains 31% of the time and the driest is Spring with only a 16% chance of a rainy day.

An annual snowfall of 55.3 inches in Custer means that it is one of the snowiest places in South Dakota.

An annual snowfall of 29.9 inches in Alcester means that it is one of the least snowy places in South Dakota.

April is the snowiest month in Custer with 11.5 inches of snow, and 9 months of the year have significant snowfall.

December is the snowiest month in Alcester with 7.1 inches of snow, and 7 months of the year have significant snowfall.