Day County, SD Climate

Day, SD County has a temperate climate that is characterized by mild summers and cold winters. The average summer temperature ranges from the mid-80s to the upper 90s Fahrenheit, while the average winter temperature ranges from the mid-teens to the upper 20s Fahrenheit. During the summer, precipitation is usually light and scattered throughout the day, while during the winter it tends to be heavier and more frequent. The area also receives occasional snowfall in late autumn and early spring, though it normally melts quickly due to its mild climate. Day, SD County generally enjoys an overall pleasant climate with both warm and cool temperatures throughout the year.

Day County, South Dakota gets 24 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Day County averages 40 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 203 sunny days per year in Day County. The US average is 205 sunny days.

Day County gets some kind of precipitation, on average, 82 days per year. Precipitation is rain, snow, sleet, or hail that falls to the ground. In order for precipitation to be counted you have to get at least .01 inches on the ground to measure.

Weather Highlights

Summer High: the July high is around 82 degrees
Winter Low: the January low is 3
Rain: averages 24 inches of rain a year
Snow: averages 40 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Day County is 6.6 (10=best), which means it is less comfortable than most places in South Dakota.

9.3 Summer - 3.9 Winter

August, July and June are the most pleasant months in Day County, while January and December are the least comfortable months.

Climate	Day, South Dakota	United States
	23.8 in.	38.1 in.
	40.4 in.	27.8 in.
	82.0 days	106.2 days
	203 days	205 days
	82.4°	85.8°
	2.9°	21.7°
	6.6	7
	2.9	4.3
	1740 ft.	2443 ft.

Climate

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.

July is the hottest month for Day County with an average high temperature of 82.4°, which ranks it as cooler than most places in South Dakota. In Day County, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Day County are June, August and July.

In Day County, there are 8.9 days annually when the high temperature is over 90°, which is cooler than most places in South Dakota.

January has the coldest nighttime temperatures for Day County with an average of 2.9°. This is colder than most places in South Dakota.

In Day County, there are 168.7 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in South Dakota.

In Day County, there are 33.9 days annually when the nighttime low temperature falls below zero°, which is colder than most places in South Dakota.

Humidity in Day County is generally low and comfortable. But there some days when the humidity becomes unpleasant, especially in July and August. The most humid months (but still comfortable) are July, August and June.

June is the wettest month in Day County with 3.8 inches of rain, and the driest month is January with 0.6 inches. The wettest season is Autumn with 43% of yearly precipitation and 8% occurs in Spring, which is the driest season. The annual rainfall of 23.8 inches in Day County means that it is about average compared to other places in South Dakota.

June is the rainiest month in Day County with 10.4 days of rain, and January is the driest month with only 4.8 rainy days. There are 82.0 rainy days annually in Day County, which is about average compared to other places in South Dakota. The rainiest season is Autumn when it rains 33% of the time and the driest is Spring with only a 18% chance of a rainy day.

An annual snowfall of 40.4 inches in Day County means that it is snowier than most places in South Dakota. January is the snowiest month in Day County with 8.3 inches of snow, and 7 months of the year have significant snowfall.

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