Iowa May Temperature by Year

This page is a list of the average statewide temperature in the month of May in Iowa for each year from 1895–2023. It is a statewide average over the entire territory of the state, based on data from the NOAA.

State:

Month:

What Was the Hottest May in Iowa History?

1934 was the warmest May in Iowa history. Statewide, the average daily high temperature was 84.6 °F, and the average low was 53.3 °F.

What Was the Coldest May in Iowa History?

1907 was the coolest May in Iowa history. Statewide, the average daily high temperature was 65.3 °F, and the average low was 40.0 °F.

Click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	25	75.8	49.9
2022	41	72.0	50.5
2021	73	69.3	48.6
2020	95	67.3	47.9
2019	110	66.7	46.6
2018	3	78.7	55.3
2017	85	69.8	47.2
2016	64	70.9	48.1
2015	57	70.0	49.8
2014	57	71.5	48.4
2013	73	69.4	48.5
2012	11	77.6	52.5
2011	70	70.4	47.8
2010	59	71.2	48.6
2009	60	71.3	48.3
2008	100	69.3	45.4
2007	14	76.2	53.2
2006	50	71.7	49.5
2005	91	69.4	46.2
2004	49	71.9	49.4
2003	89	69.2	46.6
2002	106	69.1	44.6
2001	47	71.1	50.8
2000	25	74.9	50.7
1999	53	70.8	50.2
1998	11	76.3	53.8
1997	126	66.2	42.3
1996	113	65.5	47.3
1995	112	66.7	46.3
1994	50	73.5	47.7
1993	66	69.4	49.0
1992	56	73.0	47.2
1991	17	73.6	54.7
1990	113	67.2	45.7
1989	70	72.2	46.0
1988	9	79.3	51.2
1987	8	78.0	52.6
1986	47	71.6	50.2
1985	21	75.5	50.9
1984	104	68.0	45.8
1983	117	67.0	44.7
1982	32	72.1	52.8
1981	91	69.8	45.9
1980	42	74.4	48.1
1979	81	71.4	46.1
1978	62	70.5	48.6
1977	2	79.0	55.1
1976	95	70.0	45.1
1975	25	74.9	50.7
1974	89	68.2	47.7
1973	101	68.4	46.0
1972	45	72.3	49.7
1971	106	69.2	44.3
1970	23	74.9	51.3
1969	50	72.2	49.1
1968	116	68.1	43.8
1967	119	67.9	43.4
1966	115	69.6	42.9
1965	18	75.7	51.9
1964	11	76.9	53.0
1963	66	70.6	47.8
1962	4	77.0	54.6
1961	110	68.7	44.5
1960	78	70.4	47.4
1959	33	72.5	51.4
1958	38	75.2	47.8
1957	88	69.1	47.2
1956	38	74.0	48.9
1955	28	75.7	49.7
1954	122	66.9	42.6
1953	70	70.6	47.6
1952	84	70.0	47.3
1951	40	73.0	49.8
1950	73	70.7	47.2
1949	28	74.5	50.9
1948	87	70.3	46.5
1947	123	66.6	42.8
1946	118	67.0	44.5
1945	125	65.5	43.0
1944	18	74.7	52.9
1943	106	67.7	45.8
1942	85	69.3	47.7
1941	7	77.9	52.8
1940	95	70.7	44.4
1939	5	79.6	51.8
1938	79	69.5	48.1
1937	42	72.6	49.7
1936	6	77.9	53.2
1935	126	64.2	44.2
1934	1	84.6	53.3
1933	60	70.7	48.8
1932	35	74.6	48.8
1931	106	69.6	44.0
1930	65	71.1	47.8
1929	103	68.7	45.3
1928	35	75.4	48.0
1927	95	68.3	46.9
1926	18	77.5	50.0
1925	104	71.4	42.4
1924	128	65.8	41.0
1923	81	70.9	46.6
1922	28	74.2	51.2
1921	31	74.3	50.9
1920	81	70.5	46.9
1919	99	69.2	45.8
1918	16	77.1	51.5
1917	123	67.2	42.2
1916	66	70.9	47.6
1915	119	66.5	44.6
1914	35	74.2	49.2
1913	79	69.5	48.1
1912	33	74.3	49.6
1911	15	77.2	51.8
1910	121	67.0	42.8
1909	101	69.4	45.0
1908	73	70.0	47.9
1907	129	65.3	40.0
1906	54	72.8	47.9
1905	91	69.7	46.0
1904	66	71.4	47.0
1903	42	71.6	50.7
1902	21	74.7	51.8
1901	55	72.9	47.4
1900	24	75.3	50.6
1899	62	71.1	48.1
1898	73	70.0	48.0
1897	91	71.1	44.6
1896	9	76.6	53.8
1895	45	73.9	48.0