Iowa Climate

How Iowa's latest month ranks since 1895, the normals at its main weather stations, and the climate page for every town.

How Iowa is running

NOAA NCEI Climate at a Glance, from the nClimGrid analysis of every station, updated early each month. A rank of 1 is the highest or lowest of all years since 1895.

August 2026 in Iowa: 71.9°F (+0.9 °F against 1991-2020), the 48th warmest in 132 years on record.

August 2026 in Iowa: 4.79 in (+0.66 in against 1991-2020), the 32nd wettest in 132 years on record.

January to August 2026 in Iowa: 53.1°F (+2.7 °F against 1991-2020), the 7th warmest in 132 years on record.

January to August 2026 in Iowa: 25.83 in (-0.37 in against 1991-2020), the 38th wettest in 132 years on record.

Warmest August: 79.4°F in 1947
Coolest August: 65.2°F in 1915
Wettest August: 9.69 in in 2007
Driest August: 0.99 in in 1984

Every year since 1895

Main weather stations

Annual 1991-2020 normals at the first-order (airport and Weather Service) stations; freeze dates are the median for 32°F.

Station	Avg high	Avg low	Precipitation	Snowfall	Last freeze	First freeze
Ames Muni AP	59.0°F	38.1°F	35.91 in		April 26	October 8
Burlington Muni AP	61.3°F	42.5°F	37.86 in		April 15	October 20
Cedar Rapids Muni AP	58.1°F	38.3°F	35.91 in		April 27	October 11
Davenport	59.7°F	40.2°F	36.17 in		April 23	October 15
Des Moines 17 E	59.5°F	39.6°F	36.57 in		April 21	October 15
Des Moines Intl AP	60.5°F	41.3°F	36.55 in	36.5 in	April 18	October 20
Dubuque Rgnl AP	56.4°F	38.0°F	38.20 in	42.5 in	April 28	October 11
Estherville Muni AP	54.7°F	34.6°F	29.26 in		May 2	September 30
Iowa City Muni AP	60.9°F	41.0°F	35.68 in		April 21	October 18
Lamoni Muni AP	61.3°F	41.9°F	37.38 in		April 16	October 21
Marshalltown Muni AP	58.2°F	37.2°F	32.76 in		April 30	October 6
Mason City Muni AP	56.0°F	35.2°F	36.25 in	44.4 in	May 3	October 1
Ottumwa Industrial AP	61.2°F	40.2°F	36.97 in	23.6 in	April 23	October 14
Sioux City Gateway AP	59.5°F	37.4°F	29.27 in	36.0 in	April 29	October 5
Spencer Muni AP	57.4°F	36.3°F	26.83 in		May 2	October 2
Waterloo Muni AP	59.3°F	38.7°F	36.29 in	39.1 in	April 27	October 10

Frost dates at every station in Iowa

Counties

Towns

Sources

Rankings: NOAA NCEI Climate at a Glance. Normals: NOAA NCEI U.S. Climate Normals, 1991-2020. Both public domain.