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The climate of Iowa (United States of America)
The state of Iowa is centrally located in the United States of America. Iowa is a landlocked state located east from the mountainous western part of the country. This causes the landscape in Iowa to be hilly. The northeastern part even has a mountain-like pattern. However, no really high altitudes can be found here. This part of the state is part of the Paleozoic Plateau, the Mississippi River flows through this region. Iowa has a warm continental climate. Extremes in temperatures and weather conditions are not uncommon in this state. On average 37 tornadoes hit the state every year.

Tornadoes mainly occur during spring and summer and may cause tremendous amounts of damage. Summers are warm with daytime temperatures between 28-32 degrees Celsius (82-90 degrees Fahrenheit). July is the warmest month, during this month temperatures may rise as high as 40 degrees Celsius (104 degrees Fahrenheit). As warm as it may get during the summer as cold as it may get during the winter. Because of its central location warm sea water has no influence here. When cold air is supplied from the north it may get extremely cold during here. Very low temperatures are not uncommon then, even during the day it remains freezing cold. During the winter snowfall is not uncommon. Iowa gets 20-35 days of snowfall per year with about 1 meter of snow. In extreme cases dozens of centimeters of snow may fall within 24 hours. When this occurs a few times in one winter complete villages may get completely isolated.

Climate information of places in Iowa
The climate information given on this page is only brief. Specific information on weather and climate can be found on the pages per region or city. The following climate information is available for Iowa:

Cedar Rapids
Des Moines
Sioux City


Climate information
Throughout Iowa several climate figures and temperatures can be recorded. The figures below are for Des Moines and cannot be seen as an average for this state. For climate figures for other places and regions in Iowa please, visit the individual climate pages.

temperature (°C)


temperature (°C)
hours of sunshine

average days with precipitation
per month
per month
temperature (°C)
January -2 -12 5 8 n/a
February 1 -9 6 7 n/a
March 8 -3 7 10 n/a
April 17 4 8 11 n/a
May 23 10 9 11 n/a
June 28 15 10 10 n/a
July 30 19 11 10 n/a
August 29 17 10 9 n/a
September 24 12 8 9 n/a
October 18 5 7 8 n/a
November 9 -2 5 8 n/a
December -1 -9 4 8 n/a
= 0-5 mm ● = 6-30 mm ● = 31-60 mm ● = 61-100 mm ● = 101-200 mm ● = over 200 mm
= 0-0.2 inches ● = 0.2-1.2 inches ● = 1.2-2.4 inches ● = 2.5-4 inches ● = 4.1-8 inches ● = over 8 inches

More climate information
Climate tables are useful but they don’t give an overall picture of the climate and possible weather conditions during a period of time. How high the chances are of hot or cold weather or hurricanes can often not be found in these tables. This is why we offer extra climate information per month. The figures below apply to Iowa. For climate figures on specific regions and places please, visit the relevant individual climate pages

chance of
(very) hot


chance of
(very) cool
chance of

chance of
chance of
sunny days


click here for the explanation of the symbols

The information at this site was carefully composed from climate data collected by meteorological services, meteorological offices, climate experts and other sources. “More climate info” is based on statistics, climate data and personal experience. No rights can be derived from this site. Weather has no memory and gives no guaranties. Nothing is as changeable and unpredictable as the weather. The authors of this site feel in no way responsible for any damages caused by misinterpretation or other circumstances that may influence your holiday or trip to a certain destination. We provide information, it’s up to the reader to use it to it’s benefit.


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