Stanley County, SD Climate

Stanley, SD County has a continental climate with cold winters and hot summers. The summers are usually sunny and warm, while the winters tend to be dry and cold with frequent snowfall. The average annual temperature is 39.5°F (4.2°C), while the average summer temperature is 68°F (20°C). The area receives an average of 18 inches of precipitation annually, with most of it coming during the spring months. Winters can be quite severe, but they help keep Stanley's environment cool in the summertime.

Stanley County, South Dakota gets 18 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Stanley County averages 38 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 226 sunny days per year in Stanley County. The US average is 205 sunny days.

Stanley County gets some kind of precipitation, on average, 75 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 89 degrees
Winter Low: the January low is 9
Rain: averages 18 inches of rain a year
Snow: averages 38 inches of snow a year

Bestplaces Comfort Index

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

8.8 Summer - 4.7 Winter

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

Climate	Stanley, South Dakota	United States
	Unlock	38.1 in.
	37.5 in.	Unlock
	Unlock	106.2 days
	226 days	Unlock
	88.9°	85.8°
	Unlock	21.7°
	6.9	Unlock
	Unlock	4.3
	1874 ft.	Unlock

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 Stanley County with an average high temperature of 88.9°, which ranks it as one of the hottest places in South Dakota. In Stanley County, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Stanley County are September, June and May.

In Stanley County, there are 37.4 days annually when the high temperature is over 90°, which is one of the hottest places in South Dakota.

January has the coldest nighttime temperatures for Stanley County with an average of 9.3°. This is warmer than most places in South Dakota.

In Stanley County, there are 161.2 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in South Dakota.

In Stanley County, there are 19.9 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in South Dakota.

Humidity in Stanley County is generally quite low and comfortable. There are few days during the summer when the humidity becomes unpleasant. The most humid months (but still comfortable) are July, August and June.

June is the wettest month in Stanley County with 3.0 inches of rain, and the driest month is January with 0.4 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 18.0 inches in Stanley County means that it is one of the driest places in South Dakota.

June is the rainiest month in Stanley County with 10.1 days of rain, and January is the driest month with only 4.3 rainy days. There are 74.9 rainy days annually in Stanley County, which is less rainy than most places in South Dakota. The rainiest season is Autumn when it rains 32% of the time and the driest is Spring with only a 17% chance of a rainy day.

An annual snowfall of 37.5 inches in Stanley County means that it is about average compared to other places in South Dakota. March is the snowiest month in Stanley County with 7.2 inches of snow, and 7 months of the year have significant snowfall.

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