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Climate in Iowa

Iowa, Iowa gets 35 inches of rain, on average, per year. The US average is 38 inches of rain per year.

Iowa averages 30 inches of snow per year. The US average is 28 inches of snow per year.

On average, there are 200 sunny days per year in Iowa. The US average is 205 sunny days.

Iowa gets some kind of precipitation, on average, 99 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 84 degrees
Winter Low: the January low is 10
Rain: averages 35 inches of rain a year
Snow: averages 30 inches of snow a year


Iowa's annual BestPlaces Comfort Index of 6.9 (10=best) indicates it is less comfortable than most states in the United States.

8.8 / 4.5

Summer   /   Winter
June, September and August are the most pleasant months in the state of Iowa, while January and December are the least comfortable months.

Climate Averages
  Iowa, IowaUnited States
  35.2 in.38.1 in.
  30.4 in.27.8 in.
  98.9 days106.2 days
  200 days205 days
  1068 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 Iowa with an average high temperature of 84.3°, which ranks it as cooler than most states. In Iowa, there are 5 comfortable months with high temperatures in the range of 70-85°. The most pleasant months of the year for Iowa are June, September and August.

Iowa has 13.6 days annually when the high temperature is over 90°, which is cooler than most states in the U.S.

January has the coldest nighttime temperatures for Iowa with an average of 10.2°. This is colder than most of the U.S. states.

Iowa has 147.2 days annually when the nighttime low temperature falls below freezing, which is colder than most states in the U.S.

Iowa averages 18.0 days annually when the nighttime low temperature falls below freezing, which is colder than most states in the U.S.

The humidity is usually comfortable in the state of Iowa 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 Iowa with 4.9 inches of rain, and the driest month is January with 0.9 inches. The wettest season is Autumn with 39% of yearly precipitation and 10% occurs in Spring, which is the driest season. Iowa's average annual rainfall of 35.2 inches indicates that it is drier than most states in the United States.

May is the rainiest month in Iowa with 11.6 days of rain, and February is the driest month with only 5.7 rainy days. Iowa's annual average of 98.9 days with measurable rain is less rainy than most states in the United States. The rainiest season is Summer when it rains 30% of the time and the driest is Spring with only a 19% chance of a rainy day.

Iowa's average annual snowfall of 30.4 inches indicates that it is less snowy than most states in the United States. December is the snowiest month in Iowa with 7.8 inches of snow, and 6 months of the year have significant snowfall.

  • Annual Rainfall (US Avg: 36.5")
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    Reviews for Iowa    21 Reviews
    Don't believe the low cost of living lies - 9/19/2021
    I've lived in Iowa my whole life. Opportunities are okay, but you won't get ahead here if you aren't in a union or employed in a white collar job. Although if you know... Read More

    Start Your Review of Iowa

    FUNDING FOR ALL - 2/23/2019
    Warm Greetings Every One For you to get a genuine and affordable loan offer or any kind of financial assistance you can simply get your loan from CLASSICO... Read More

    The place to be - 2/13/2019
    I love Iowa like how simple it... Read More

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