Iowa Weather Records

Weather averages and records for the U.S. state of Iowa based on data made available by the NOAA.

State:

Month:

Iowa Statewide Averages

Average temperatures and precipitation over the entire territory of the state, from 1991–2020.

Month	High (°F)	Low (°F)	Precipitation (in)
January	28.1	10.9	1.0
February	33.1	15.1	1.2
March	46.3	26.5	2.0
April	60.1	37.2	3.7
May	71.1	48.8	4.8
June	80.6	59.2	5.3
July	83.9	62.9	4.2
August	81.7	60.3	4.1
September	75.4	51.9	3.5
October	62.3	39.6	2.7
November	46.4	27.4	1.8
December	33.2	16.7	1.4
Entire Year	58.5	38.1	35.6

Iowa Cities

Yearly weather averages for various places in Iowa, from 1991–2020.

City	Average (°F)		Record (°F)		Yearly (inches)
City	High	Low	High	Low	Precipitation	Snow
Ames	59.2	38.5	109	-37	35.7	n/a
Burlington	61.9	42.8	111	-27	37.4	n/a
Carroll	59.0	37.6	112	-40	33.3	29.8
Cedar Rapids	60.3	40.2	110	-33	38.6	33.0
Davenport	61.2	41.0	111	-33	38.3	36.1
Des Moines	60.8	41.8	113	-32	36.6	36.8
Dubuque	56.6	38.3	101	-31	38.2	42.6
Fort Madison	61.7	44.2	107	-23	39.1	20.7
Iowa City	60.6	40.9	109	-32	35.8	n/a
Iowa Falls	57.3	36.5	111	-34	38.1	29.4
Lamoni	61.4	41.2	113	-29	40.3	28.2
Mason City	56.3	35.6	107	-35	36.2	44.6
Northwood	54.0	34.7	107	-37	34.1	34.5
Ottumwa	60.8	41.1	115	-36	36.9	n/a
Rockwell City	57.6	36.8	110	-35	32.0	30.8
Sac City	57.6	36.4	114	-35	32.9	30.5
Sioux City	60.2	37.8	108	-28	29.3	36.1
Spirit Lake	56.0	37.6	109	-39	28.7	41.4
Waterloo	58.3	37.5	112	-34	36.3	39.1
Webster City	58.2	36.2	109	-34	36.8	33.4