Decatur, WI Climate


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United States / Wisconsin / Madison Metro Area / Green County / Decatur / Zip Codes
Decatur, WI has a humid continental climate, characterized by warm summers and cold winters. The average temperature in July is a balmy 75°F (24°C), while the average temperature in January is a chilly 20°F (-7°C). Precipitation is spread evenly throughout the year, with an average of approximately 40 inches (102 cm) annually. Decatur experiences all four seasons, with most of the precipitation falling as snow during the winter months.

Decatur, Wisconsin gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Decatur averages 34 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 186 sunny days per year in Decatur. The US average is 205 sunny days.

Decatur gets some kind of precipitation, on average, 116 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 83 degrees
Winter Low: the January low is 11
Rain: averages 36 inches of rain a year
Snow: averages 34 inches of snow a year

Bestplaces Comfort Index

The annual BestPlaces Comfort Index for Decatur is 6.8 (10=best), which means it is one of the most pleasant places in Wisconsin.

9 Summer - 4.3 Winter
June, August and September are the most pleasant months in Decatur, while January and December are the least comfortable months.

  ClimateDecatur, WisconsinUnited States
  36.4 in.38.1 in.
  34.2 in.27.8 in.
  116.2 days106.2 days
  186 days205 days
  83.0°85.8°
  11.0°21.7°
  6.87
  3.54.3
  823 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 Decatur with an average high temperature of 83.0°, which ranks it as one of the hottest places in Wisconsin. In Decatur, there are 4 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Decatur are June, August and September.
In Decatur, there are 9.8 days annually when the high temperature is over 90°, which is one of the hottest places in Wisconsin.
January has the coldest nighttime temperatures for Decatur with an average of 11.0°. This is warmer than most places in Wisconsin.
In Decatur, there are 146.3 days annually when the nighttime low temperature falls below freezing, which is warmer than most places in Wisconsin.
In Decatur, there are 16.1 days annually when the nighttime low temperature falls below zero°, which is warmer than most places in Wisconsin.
The humidity is usually comfortable in Decatur but some summer months can be sticky or muggy. July is the most humid month, though humidity is low for most of the year. The most humid months are July, August and June.
June is the wettest month in Decatur with 4.8 inches of rain, and the driest month is January with 1.4 inches. The wettest season is Autumn with 36% of yearly precipitation and 13% occurs in Spring, which is the driest season. The annual rainfall of 36.4 inches in Decatur means that it is one of the wettest places in Wisconsin.
May is the rainiest month in Decatur with 11.7 days of rain, and February is the driest month with only 7.6 rainy days. There are 116.2 rainy days annually in Decatur, which is rainier than most places in Wisconsin. The rainiest season is Summer when it rains 27% of the time and the driest is Spring with only a 22% chance of a rainy day.
An annual snowfall of 34.2 inches in Decatur means that it is one of the least snowy places in Wisconsin. January is the snowiest month in Decatur with 10.4 inches of snow, and 6 months of the year have significant snowfall.
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