2025 Compare Climate & Weather:
Olympia, WA vs Sioux Falls, SD

Highlights

On average, there are 211 sunny days per year in Sioux Falls. Olympia averages 136 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. Olympia, Washington gets 52.7 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. Olympia averages 6 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

Olympia, Washington
Summer High: the July high is around 77.1 degrees
Winter Low: the January low is 33.9
Rain: averages 52.7 inches of rain a year
Snow: averages 6 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 Olympia is 7.1 (10=best), which means it is about average compared to other places in Washington.

Today's Weather - Olympia, WA

40°F

Today's Weather - Sioux Falls, SD

50°F

Average Monthly High / Low (°F)

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

August is the hottest month for Olympia with an average high temperature of 78.0°, which ranks it as about average compared to other places in Washington. In Olympia, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Olympia are August, July and September.

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.

December has the coldest nighttime temperatures for Olympia with an average of 32.9°. This is about average compared to other places in Washington.

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 Olympia, there are 5.7 days annually when the high temperature is over 90°, which is about average compared to other places in Washington.

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 Olympia, there are 61.6 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in Washington.

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 Olympia, 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 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.

November is the wettest month in Olympia with 9.0 inches of rain, and the driest month is July with 0.8 inches. The wettest season is Spring with 41% of yearly precipitation and 7% occurs in Autumn, which is the driest season. The annual rainfall of 52.7 inches in Olympia means that it is wetter than most places in Washington.


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.

November is the rainiest month in Olympia with 21.0 days of rain, and July is the driest month with only 4.8 rainy days. There are 167.2 rainy days annually in Olympia, which is rainier than most places in Washington. The rainiest season is Spring when it rains 34% of the time and the driest is Autumn with only a 11% 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 6.0 inches in Olympia means that it is about average compared to other places in Washington.

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

February is the snowiest month in Olympia with 2.3 inches of snow, and 4 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.