Roslyn, SD Climate


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United States / South Dakota / No Metro Area / Day County / Roslyn / Zip Codes
Roslyn, SD has a humid continental climate, with hot summers and cold winters. Precipitation is spread fairly evenly throughout the year but is usually heaviest in the spring months. During the summer months, temperatures average about 75°F and can reach into the 90s on some days. Winters are typically cold with temperatures that average in the low 20s and can get as low as -20°F on occasion. Snowfall during winter averages at around 20 inches per year, but can be significantly higher in years where storms happen more frequently.

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

Roslyn averages 43 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 199 sunny days per year in Roslyn. The US average is 205 sunny days.

Roslyn 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 43 inches of snow a year

Bestplaces Comfort Index

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

9.4 Summer - 3.9 Winter
August, July and June are the most pleasant months in Roslyn, while January and December are the least comfortable months.

  ClimateRoslyn, South DakotaUnited States
  23.8 in.38.1 in.
  42.8 in.27.8 in.
  82.1 days106.2 days
  199 days205 days
  81.9°85.8°
  2.5°21.7°
  6.67
  2.94.3
  1860 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 Roslyn with an average high temperature of 81.9°, which ranks it as one of the coolest places in South Dakota. In Roslyn, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Roslyn are June, August and July.
In Roslyn, there are 8.3 days annually when the high temperature is over 90°, which is one of the coolest places in South Dakota.
January has the coldest nighttime temperatures for Roslyn with an average of 2.5°. This is colder than most places in South Dakota.
In Roslyn, there are 167.2 days annually when the nighttime low temperature falls below freezing, which is about average compared to other places in South Dakota.
In Roslyn, there are 35.4 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in South Dakota.
Humidity in Roslyn 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 Roslyn 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 Roslyn means that it is about average compared to other places in South Dakota.
June is the rainiest month in Roslyn with 10.4 days of rain, and January is the driest month with only 4.7 rainy days. There are 82.1 rainy days annually in Roslyn, 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 42.8 inches in Roslyn means that it is snowier than most places in South Dakota. January is the snowiest month in Roslyn with 8.9 inches of snow, and 7 months of the year have significant snowfall.
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