Average August Temperature in Waterloo by Year

This page contains a list of the average monthly high and low temperatures in Waterloo, Iowa for the month of August each year between 1895 and 2023. It is based on NOAA data.

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What Was the Hottest August Ever in Waterloo?

1947 was the warmest August in the history of Waterloo, Iowa. The average daily high temperature was 90.6 °F, and the average low was 68.3 °F.

What Was the Coldest August Ever in Waterloo?

1992 was the coolest August in the history of Waterloo, Iowa. The average daily high temperature was 77.1 °F, and the average low was 52.8 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	13	87.2	62.4
2022	33	83.5	62.5
2021	17	86.2	61.9
2020	28	86.0	60.3
2019	84	81.6	59.3
2018	74	81.2	60.8
2017	121	78.6	55.5
2016	48	81.7	62.0
2015	104	79.4	58.2
2014	49	82.2	61.5
2013	56	82.8	60.5
2012	72	85.2	56.8
2011	61	83.5	59.3
2010	18	84.3	63.6
2009	110	78.1	58.6
2008	93	81.9	57.9
2007	29	82.6	63.6
2006	67	81.2	61.4
2005	94	81.9	57.9
2004	125	77.2	55.5
2003	24	86.7	60.2
2002	97	80.9	58.8
2001	53	82.6	60.8
2000	52	82.5	60.9
1999	101	79.1	59.0
1998	50	81.3	62.4
1997	107	79.1	58.0
1996	83	82.4	58.6
1995	5	87.5	67.2
1994	118	78.9	56.1
1993	42	81.7	63.1
1992	129	77.1	52.8
1991	57	82.6	60.7
1990	55	81.5	61.9
1989	58	83.9	59.2
1988	8	89.4	63.4
1987	96	79.6	60.1
1986	124	77.9	55.0
1985	117	78.9	56.3
1984	43	85.3	59.5
1983	4	88.7	66.0
1982	86	80.4	60.0
1981	102	79.1	59.0
1980	30	83.4	62.7
1979	51	80.9	62.7
1978	62	83.7	59.2
1977	127	76.2	55.6
1976	98	83.0	56.3
1975	35	83.5	62.2
1974	111	79.0	57.5
1973	20	83.8	63.8
1972	70	80.5	61.6
1971	123	80.2	53.2
1970	91	81.3	58.7
1969	81	83.2	58.0
1968	99	79.4	59.5
1967	128	76.6	53.8
1966	120	79.2	55.6
1965	115	79.4	56.2
1964	113	80.1	56.2
1963	95	81.3	58.5
1962	79	82.5	58.9
1961	54	83.6	59.8
1960	37	83.7	61.8
1959	9	85.7	66.0
1958	75	83.1	58.7
1957	60	82.1	60.9
1956	65	82.0	60.6
1955	10	88.7	62.8
1954	71	81.6	60.5
1953	47	85.5	58.4
1952	92	81.3	58.7
1951	103	78.7	59.3
1950	116	79.5	55.7
1949	39	84.4	61.1
1948	26	84.7	61.8
1947	1	90.6	68.3
1946	119	78.4	56.5
1945	68	81.3	61.2
1944	69	81.8	60.5
1943	34	82.8	63.1
1942	77	81.9	59.6
1941	19	86.1	61.8
1940	90	79.3	60.8
1939	80	82.8	58.5
1938	11	87.1	63.6
1937	6	88.9	65.0
1936	2	91.8	64.6
1935	32	84.3	61.7
1934	82	82.3	58.7
1933	85	83.5	57.2
1932	44	83.2	61.4
1931	38	86.3	59.3
1930	21	87.5	60.1
1929	78	83.5	57.9
1928	45	84.1	60.2
1927	122	80.5	53.5
1926	27	85.0	61.4
1925	46	86.5	57.5
1924	66	83.3	59.3
1923	89	82.2	57.9
1922	25	86.9	59.9
1921	63	83.6	59.1
1920	108	81.9	55.0
1919	59	84.8	58.3
1918	12	87.3	62.5
1917	88	84.8	55.3
1916	16	88.9	59.6
1915	126	78.7	53.5
1914	36	86.6	59.0
1913	23	85.7	61.6
1912	106	79.3	58.1
1911	100	80.3	58.0
1910	41	84.4	60.7
1909	7	89.5	63.6
1908	87	82.4	57.7
1907	76	82.0	59.6
1906	14	85.8	63.5
1905	15	86.4	62.5
1904	109	82.5	54.4
1903	114	78.6	57.5
1902	105	78.8	58.7
1901	31	87.9	58.2
1900	3	89.6	65.4
1899	22	86.2	61.1
1898	73	84.0	58.0
1897	112	80.8	55.6
1896	64	83.6	59.1
1895	40	86.1	59.2

Weather Station Details

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