Mercier, SD Climate


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Mercier, SD has a temperate climate with warm summers and cold winters. The average high temperature during the summer months is roughly 80 degrees Fahrenheit, while the average low temperature during winter can dip to as low as 15 degrees. Rainfall is generally moderate throughout the year, with around 25 inches of precipitation annually. Snowfall is also common in the area, with an average snowfall of 30 inches per year. Despite these cold temperatures, Mercier still enjoys plenty of sunshine each year, receiving over 2200 hours of sunlight annually.

Bestplaces Comfort Index

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

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

  ClimateMercier, South DakotaUnited States
  22.0 in.38.1 in.
  37.8 in.27.8 in.
  86.0 days106.2 days
  202 days205 days
  83.7°85.8°
  1.6°21.7°
  6.67
  34.3
  1375 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 Mercier with an average high temperature of 83.7°, which ranks it as cooler than most places in South Dakota. In Mercier, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Mercier are June, August and September.
In Mercier, there are 14.3 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 Mercier with an average of 1.6°. This is one of the coldest places in South Dakota.
In Mercier, there are 179.3 days annually when the nighttime low temperature falls below freezing, which is one of the coldest places in South Dakota.
In Mercier, there are 37.2 days annually when the nighttime low temperature falls below zero°, which is one of the coldest places in South Dakota.
Humidity in Mercier 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 Mercier with 3.5 inches of rain, and the driest month is January with 0.5 inches. The wettest season is Autumn with 43% of yearly precipitation and 7% occurs in Spring, which is the driest season. The annual rainfall of 22.0 inches in Mercier means that it is drier than most places in South Dakota.
June is the rainiest month in Mercier with 10.6 days of rain, and February is the driest month with only 5.3 rainy days. There are 86.0 rainy days annually in Mercier, which is rainier 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 19% chance of a rainy day.
An annual snowfall of 37.8 inches in Mercier means that it is about average compared to other places in South Dakota. March is the snowiest month in Mercier with 6.9 inches of snow, and 7 months of the year have significant snowfall.
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