National Weather Service United States Department of Commerce

The statewide maps below are based on 30-year climate normals from 1981-2010. For your convenience, a table displaying the numerical value of each normal for select cities has been added to the bottom of each map.

*** Note: The exact values in the tables may not always match the corresponding color of the maps due to the interpolation method used and the location of the observation site relative to the city. ***


Annual Normals

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image


 Winter (December, January, February) Normals

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image 


Summer (June, July, August) Normals

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image 


Monthly High Temperature Normals

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image Image depicting Iowa climate normals - click for larger image

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image 


Monthly Precipitation Normals

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image

Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image  Image depicting Iowa climate normals - click for larger image

Image depicting Iowa climate normals - click for larger image   

Image depicting Iowa climate normals - click for larger image Image depicting Iowa climate normals - click for larger image


Normal Date of First/Last Frost (Temperature <= 36°)

Image depicting Iowa climate normals - click for larger image                       Image depicting Iowa climate normals - click for larger image


Normal Date of First/Last Freeze (Temperature <= 28°)

Image depicting Iowa climate normals - click for larger image                       Image depicting Iowa climate normals - click for larger image


Normal Date of First/Last One Inch Snowfall

Image depicting Iowa climate normals - click for larger image                       Image depicting Iowa climate normals - click for larger image 


Normal Date of First/Last 70° Temperature

Image depicting Iowa climate normals - click for larger image              Image depicting Iowa climate normals - click for larger image


Normal Date of First/Last 80° Temperature

Image depicting Iowa climate normals - click for larger image              Image depicting Iowa climate normals - click for larger image

 


Normal Date of First/Last 90° Temperature

        Image depicting Iowa climate normals - click for larger image              Image depicting Iowa climate normals - click for larger image         

 

***A PDF document containing all of the above maps can be found here.***