Number of Days of 90 °F in Iowa City by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 90 degrees Fahrenheit in Iowa City, Iowa, between 1893 and 2024.

Also see:

Which year had the most 90° days?

Based on NOAA records, the year 1988 holds the record for the most 90 °F days in Iowa City history. There were 63 days with a high temperature of at least 90 degrees that year.

How many so far this year (2024)?

It has not reached 90 degrees Fahrenheit in Iowa City so far in 2024. As of April 30, the highest temperature this year is 86 °F.

The last time it reached at least 90° F was October 1, 2023.

Years marked with a gold background have more than 5% incomplete data
Click column headers to sort

Year	Rank	Days >= 90 °F
2024	132	0
2023	40	31
2022	62	25
2021	40	31
2020	74	22
2019	53	27
2018	31	35
2017	45	30
2016	105	16
2015	117	10
2014	126	4
2013	64	24
2012	15	43
2011	74	22
2010	120	9
2009	125	6
2008	127	3
2007	108	14
2006	74	22
2005	5	52
2004	129	2
2003	78	21
2002	53	27
2001	92	19
2000	120	9
1999	74	22
1998	64	24
1997	69	23
1996	95	18
1995	26	38
1994	62	25
1993	122	8
1992	124	7
1991	28	37
1990	103	17
1989	78	21
1988	1	63
1987	16	42
1986	95	18
1985	40	31
1984	40	31
1983	3	61
1982	114	12
1981	117	10
1980	8	46
1979	69	23
1978	78	21
1977	45	30
1976	95	18
1975	11	44
1974	78	21
1973	53	27
1972	53	27
1971	45	30
1970	50	29
1969	92	19
1968	45	30
1967	108	14
1966	53	27
1965	103	17
1964	36	32
1963	78	21
1962	110	13
1961	92	19
1960	69	23
1959	95	18
1958	122	8
1957	33	33
1956	40	31
1955	7	49
1954	28	37
1953	21	40
1952	53	27
1951	129	2
1950	129	2
1949	95	18
1948	78	21
1947	19	41
1946	117	10
1945	105	16
1944	110	13
1943	95	18
1942	78	21
1941	36	32
1940	51	28
1939	78	21
1938	64	24
1937	61	26
1936	4	56
1935	33	33
1934	5	52
1933	11	44
1932	69	23
1931	8	46
1930	19	41
1929	115	11
1928	110	13
1927	78	21
1926	90	20
1925	51	28
1924	115	11
1923	64	24
1922	95	18
1921	11	44
1920	64	24
1919	33	33
1918	95	18
1917	110	13
1916	16	42
1915	127	3
1914	24	39
1913	10	45
1912	53	27
1911	36	32
1910	45	30
1909	26	38
1908	30	36
1907	78	21
1906	21	40
1905	69	23
1904	107	15
1903	90	20
1902	78	21
1901	2	62
1900	21	40
1899	32	34
1898	36	32
1897	11	44
1896	53	27
1895	16	42
1894	24	39
1893	78	21

Weather Station Details

Years	Station	Coordinates
1999–2024	Iowa City Municipal Airport	location
1893–1998	Iowa City	location