Sully, SD Climate


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United States / South Dakota / No Metro Area / Tripp County / Sully / Zip Codes
Sully, SD has a humid continental climate with hot summers and cold winters. The average temperature in the warmest months is around 80°F (27°C) and the average temperature in the coldest months is around 20°F (-6°C). Precipitation is fairly consistent throughout the year with an average of 23 inches (58 cm) per year. Snowfall averages 37 inches (94 cm) annually and can range from heavy snowfalls to light dustings depending on the season. Winters are typically windy and temperatures can drop below freezing during some nights. Summers are usually mild and sunny, making it a great place to enjoy outdoor activities like camping, fishing, and hiking.

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Sully is 7.1 (10=best), which means it is one of the most pleasant places in South Dakota.

9.1 Summer - 5 Winter
June, September and August are the most pleasant months in Sully, while January and December are the least comfortable months.

  ClimateSully, South DakotaUnited States
  24.2 in.38.1 in.
  44.7 in.27.8 in.
  73.5 days106.2 days
  228 days205 days
  87.5°85.8°
  11.9°21.7°
  7.17
  3.54.3
  1900 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 Sully with an average high temperature of 87.5°, which ranks it as warmer than most places in South Dakota. In Sully, there are 3 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Sully are September, June and May.
In Sully, there are 29.5 days annually when the high temperature is over 90°, which is hotter than most places in South Dakota.
January has the coldest nighttime temperatures for Sully with an average of 11.9°. This is warmer than most places in South Dakota.
In Sully, there are 154.3 days annually when the nighttime low temperature falls below freezing, which is one of the warmest places in South Dakota.
In Sully, there are 17.3 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in South Dakota.
Humidity in Sully 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 Sully with 3.9 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Autumn with 39% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 24.2 inches in Sully means that it is about average compared to other places in South Dakota.
June is the rainiest month in Sully with 9.7 days of rain, and January is the driest month with only 3.3 rainy days. There are 73.5 rainy days annually in Sully, which is less rainy than most places in South Dakota. The rainiest season is Autumn when it rains 33% of the time and the driest is Spring with only a 14% chance of a rainy day.
An annual snowfall of 44.7 inches in Sully means that it is one of the snowiest places in South Dakota. March is the snowiest month in Sully with 8.7 inches of snow, and 7 months of the year have significant snowfall.
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