2025 Compare Climate & Weather:
Spearfish, SD vs Deadwood, SD

Highlights

On average, there are 230 sunny days per year in Deadwood. Spearfish averages 227 sunny days per year. The US average is 205 sunny days.

Deadwood, South Dakota gets 30 inches of rain, on average, per year. Spearfish, South Dakota gets 21.3 inches of rain, on average, per year. The US average is 38.1 inches of rain per year.

Deadwood averages 137.7 inches of snow per year. Spearfish averages 56.4 inches of snow per year. The US average is 27.8 inches of snow per year.

Weather Highlights

Deadwood, South Dakota
Summer High: the July high is around 80.2 degrees
Winter Low: the January low is 11.4
Rain: averages 30 inches of rain a year
Snow: averages 137.7 inches of snow a year

Spearfish, South Dakota
Summer High: the July high is around 87.6 degrees
Winter Low: the January low is 17
Rain: averages 21.3 inches of rain a year
Snow: averages 56.4 inches of snow a year

BestPlaces Comfort Index

The annual BestPlaces Comfort Index for Deadwood is 6.1 (10=best), which means it is one of the least comfortable places in South Dakota.

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

Today's Weather - Spearfish, SD

62°F

Today's Weather - Deadwood, SD

53°F

Average Monthly High / Low (°F)

Hot, Freezing, Rainy, Snowy Days: Spearfish / Deadwood

July is the hottest month for Spearfish with an average high temperature of 87.6°, which ranks it as warmer than most places in South Dakota. In Spearfish, there are 2 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Spearfish are June, September and August.

July is the hottest month for Deadwood with an average high temperature of 80.2°, which ranks it as one of the coolest places in South Dakota. In Deadwood, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Deadwood are August, July and June.

January has the coldest nighttime temperatures for Spearfish with an average of 17.0°. This is one of the warmest places in South Dakota.

December has the coldest nighttime temperatures for Deadwood with an average of 11.0°. This is warmer than most places in South Dakota.

In Spearfish, there are 31.3 days annually when the high temperature is over 90°, which is hotter than most places in South Dakota.

In Deadwood, there are 6.9 days annually when the high temperature is over 90°, which is one of the coolest places in South Dakota.

In Spearfish, there are 144.6 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in South Dakota.

In Deadwood, there are 203.2 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in South Dakota.

In Spearfish, there are 12.9 days annually when the nighttime low temperature falls below zero°, which is one of the warmest places in South Dakota.

In Deadwood, there are 23.7 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 Spearfish with 3.6 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Summer with 34% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 21.3 inches in Spearfish means that it is drier than most places in South Dakota.


May is the wettest month in Deadwood with 4.8 inches of rain, and the driest month is January with 1.3 inches. The wettest season is Summer with 35% of yearly precipitation and 14% occurs in Spring, which is the driest season. The annual rainfall of 30.0 inches in Deadwood means that it is one of the wettest places in South Dakota.

June is the rainiest month in Spearfish with 11.7 days of rain, and February is the driest month with only 5.5 rainy days. There are 90.3 rainy days annually in Spearfish, which is one of the rainiest places in South Dakota. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 19% chance of a rainy day.

May is the rainiest month in Deadwood with 12.7 days of rain, and November is the driest month with only 7.3 rainy days. There are 110.8 rainy days annually in Deadwood, which is one of the rainiest places in South Dakota. The rainiest season is Summer when it rains 29% of the time and the driest is Winter with only a 21% chance of a rainy day.

An annual snowfall of 56.4 inches in Spearfish means that it is one of the snowiest places in South Dakota.

An annual snowfall of 137.7 inches in Deadwood means that it is one of the snowiest places in South Dakota.

March is the snowiest month in Spearfish with 10.8 inches of snow, and 8 months of the year have significant snowfall.

April is the snowiest month in Deadwood with 24.1 inches of snow, and 9 months of the year have significant snowfall.