Cornwall, SD Climate


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United States / South Dakota / No Metro Area / Spink County / Cornwall / Zip Codes
Cornwall, SD experiences a semi-arid continental climate with cold snowy winters and hot summers. Winters usually have below-freezing temperatures while summers tend to reach into the 90s Fahrenheit. In addition, the area tends to experience strong winds and extreme weather conditions throughout the year. Snowfall averages around 48 inches per year while rainfall is generally around 19 inches annually. Cornwall experiences an average of 224 sunny days each year.

Cornwall, South Dakota gets 22 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Cornwall averages 39 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 206 sunny days per year in Cornwall. The US average is 205 sunny days.

Cornwall gets some kind of precipitation, on average, 74 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 85 degrees
Winter Low: the January low is 4
Rain: averages 22 inches of rain a year
Snow: averages 39 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Cornwall is 6.8 (10=best), which means it is about average compared to other places in South Dakota.

9.2 Summer - 4.3 Winter
August, June and July are the most pleasant months in Cornwall, while January and December are the least comfortable months.

  ClimateCornwall, South DakotaUnited States
  22.4 in.38.1 in.
  38.7 in.27.8 in.
  74.2 days106.2 days
  206 days205 days
  85.1°85.8°
  4.3°21.7°
  6.87
  3.64.3
  1261 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 Cornwall with an average high temperature of 85.1°, which ranks it as about average compared to other places in South Dakota. In Cornwall, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Cornwall are June, September and August.
In Cornwall, there are 17.0 days annually when the high temperature is over 90°, which is about average compared to other places in South Dakota.
January has the coldest nighttime temperatures for Cornwall with an average of 4.3°. This is colder than most places in South Dakota.
In Cornwall, there are 170.0 days annually when the nighttime low temperature falls below freezing, which is colder than most places in South Dakota.
In Cornwall, there are 30.0 days annually when the nighttime low temperature falls below zero°, which is colder than most places in South Dakota.
Humidity in Cornwall 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 Cornwall with 3.7 inches of rain, and the driest month is January with 0.4 inches. The wettest season is Autumn with 41% of yearly precipitation and 6% occurs in Spring, which is the driest season. The annual rainfall of 22.4 inches in Cornwall means that it is drier than most places in South Dakota.
June is the rainiest month in Cornwall with 9.7 days of rain, and November is the driest month with only 4.0 rainy days. There are 74.2 rainy days annually in Cornwall, 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 38.7 inches in Cornwall means that it is snowier than most places in South Dakota. March is the snowiest month in Cornwall with 8.0 inches of snow, and 7 months of the year have significant snowfall.
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