Decorah, Iowa 

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United States / Iowa / No Metro Area / Winneshiek County / Decorah / Zip Codes
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Climate in Decorah, Iowa

Decorah, Iowa gets 36 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Decorah averages 40 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 192 sunny days per year in Decorah. The US average is 205 sunny days.

Decorah gets some kind of precipitation, on average, 106 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 8
Rain: averages 36 inches of rain a year
Snow: averages 40 inches of snow a year


The annual BestPlaces Comfort Index for Decorah is 6.7 (10=best), which means it is less comfortable than most places in Iowa.

6.7 / 10
June, August and September are the most pleasant months in Decorah, while January and December are the least comfortable months.

Climate Averages
  Decorah, IowaUnited States
  35.6 in.38.1 in.
  39.5 in.27.8 in.
  106.2 days106.2 days
  192 days205 days
  873 ft.2443 ft.


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 Decorah with an average high temperature of 82.8°, which ranks it as cooler than most places in Iowa. In Decorah, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Decorah are June, August and September.

January has the coldest nighttime temperatures for Decorah with an average of 7.8°. This is colder than most places in Iowa.

In Decorah, there are 8.3 days annually when the high temperature is over 90°, which is cooler than most places in Iowa.

In Decorah, there are 154.5 days annually when the nighttime low temperature falls below freezing, which is colder than most places in Iowa.

In Decorah, there are 23.8 days annually when the nighttime low temperature falls below zero°, which is colder than most places in Iowa.

June is the wettest month in Decorah with 5.1 inches of rain, and the driest month is January with 0.9 inches. The wettest season is Autumn with 40% of yearly precipitation and 9% occurs in Spring, which is the driest season. The annual rainfall of 35.6 inches in Decorah means that it is about average compared to other places in Iowa.

May is the rainiest month in Decorah with 12.1 days of rain, and February is the driest month with only 5.7 rainy days. There are 106.2 rainy days annually in Decorah, which is rainier than most places in Iowa. The rainiest season is Autumn when it rains 29% of the time and the driest is Spring with only a 19% chance of a rainy day.

An annual snowfall of 39.5 inches in Decorah means that it is one of the snowiest places in Iowa. December is the snowiest month in Decorah with 10.6 inches of snow, and 6 months of the year have significant snowfall.

  • Annual Rainfall (US Avg: 36.5")
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    Reviews for Decorah    3 Reviews
    expensive for a small town - 5/26/2015
    ridiculously expensive housing for such a small town. The wages in the town do not even remotely compensate for the high cost of housing. Average housing prices start... Read More

    Start Your Review of Decorah

    Decorah, IA - 6/9/2010
    I have been a resident of Decorah, IA for 26 years. Decorah is located in the northeast corner of Iowa. When we entertain out of town guests they always comment how... Read More

    Luther College - 1/3/2010
    This college has the most extensive music program of any liberal arts college around, has a strong connection to public radio, and Decorah is reputed to be a lovely... Read More

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