Number of Days of 90 °F in Waterloo 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 Waterloo, Iowa, between 1895 and 2024.

Also see:

Which year had the most 90° days?

Based on NOAA records, the year 1936 holds the record for the most 90 °F days in Waterloo history. There were 60 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 Waterloo so far in 2024. As of April 16, the highest temperature this year is 85 °F.

The last time it reached at least 90° F was October 2, 2023.

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

Year	Rank	Days >= 90 °F
2024	130	0
2023	16	36
2022	51	23
2021	20	35
2020	31	29
2019	81	15
2018	75	16
2017	72	17
2016	108	8
2015	112	7
2014	120	5
2013	58	20
2012	9	43
2011	58	20
2010	103	10
2009	123	4
2008	123	4
2007	108	8
2006	91	13
2005	51	23
2004	128	2
2003	38	26
2002	38	26
2001	91	13
2000	88	14
1999	75	16
1998	75	16
1997	96	12
1996	81	15
1995	28	32
1994	91	13
1993	123	4
1992	120	5
1991	53	22
1990	96	12
1989	67	18
1988	6	50
1987	38	26
1986	99	11
1985	67	18
1984	81	15
1983	10	42
1982	106	9
1981	126	3
1980	38	26
1979	115	6
1978	64	19
1977	88	14
1976	67	18
1975	28	32
1974	99	11
1973	75	16
1972	81	15
1971	108	8
1970	81	15
1969	115	6
1968	81	15
1967	115	6
1966	81	15
1965	115	6
1964	47	24
1963	58	20
1962	103	10
1961	91	13
1960	91	13
1959	75	16
1958	120	5
1957	88	14
1956	64	19
1955	13	39
1954	54	21
1953	25	33
1952	35	27
1951	126	3
1950	115	6
1949	54	21
1948	67	18
1947	31	29
1946	103	10
1945	99	11
1944	96	12
1943	67	18
1942	75	16
1941	30	31
1940	47	24
1939	20	35
1938	25	33
1937	10	42
1936	1	60
1935	25	33
1934	4	52
1933	5	51
1932	43	25
1931	2	58
1930	15	37
1929	54	21
1928	72	17
1927	43	25
1926	35	27
1925	16	36
1924	99	11
1923	20	35
1922	54	21
1921	3	56
1920	64	19
1919	72	17
1918	47	24
1917	58	20
1916	8	47
1915	129	1
1914	16	36
1913	16	36
1912	58	20
1911	35	27
1910	13	39
1909	38	26
1908	34	28
1907	106	9
1906	43	25
1905	58	20
1904	108	8
1903	112	7
1902	112	7
1901	7	49
1900	23	34
1899	47	24
1898	31	29
1897	23	34
1896	43	25
1895	12	40

Weather Station Details

Years	Station	Coordinates
1950–2024	Waterloo Municipal Airport	location
1895–1950	Waterloo	location