Average December 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 December each year between 1895 and 2023. It is based on NOAA data.

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What Was the Hottest December Ever in Waterloo?

2023 was the warmest December in the history of Waterloo, Iowa. The average daily high temperature was 43.5 °F, and the average low was 26.2 °F.

What Was the Coldest December Ever in Waterloo?

1983 was the coolest December in the history of Waterloo, Iowa. The average daily high temperature was 14.4 °F, and the average low was -1.2 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	1	43.5	26.2
2022	76	30.5	13.4
2021	10	40.9	21.8
2020	36	36.6	16.9
2019	14	39.6	20.5
2018	17	37.1	21.2
2017	77	31.3	12.5
2016	74	28.3	15.9
2015	2	39.9	27.8
2014	25	34.3	21.7
2013	121	24.3	5.2
2012	40	35.8	17.1
2011	16	38.0	21.2
2010	110	25.1	8.7
2009	98	26.5	11.0
2008	120	26.1	3.6
2007	95	26.4	11.4
2006	11	39.9	21.4
2005	109	24.2	10.0
2004	51	34.8	16.0
2003	31	35.4	19.0
2002	18	40.2	17.7
2001	13	39.5	21.1
2000	128	16.5	0.6
1999	46	36.4	15.4
1998	21	38.8	18.2
1997	37	32.1	21.2
1996	102	25.9	11.1
1995	67	31.2	15.9
1994	42	34.4	18.1
1993	53	33.3	17.3
1992	68	31.3	15.6
1991	43	33.9	18.5
1990	103	27.6	8.7
1989	122	22.1	4.1
1988	69	33.4	13.4
1987	33	33.8	20.1
1986	62	30.9	17.6
1985	127	20.1	-2.4
1984	63	33.6	14.3
1983	129	14.4	-1.2
1982	15	38.1	21.7
1981	87	27.9	11.3
1980	72	30.3	14.1
1979	22	38.5	18.1
1978	89	27.4	11.6
1977	112	24.0	9.5
1976	123	24.8	0.7
1975	54	33.1	17.5
1974	60	30.8	18.0
1973	83	27.7	12.9
1972	114	23.7	8.5
1971	64	31.1	16.7
1970	90	28.8	9.9
1969	107	25.9	8.7
1968	99	26.8	10.4
1967	56	33.7	16.4
1966	70	31.4	13.7
1965	5	41.7	23.5
1964	91	27.2	11.0
1963	126	19.5	1.2
1962	79	30.8	12.2
1961	101	27.6	9.4
1960	84	30.0	10.5
1959	6	39.7	25.0
1958	97	28.7	8.8
1957	27	35.9	19.6
1956	58	33.6	15.6
1955	106	26.6	8.0
1954	45	32.9	19.1
1953	28	35.7	19.3
1952	44	32.3	19.9
1951	85	29.0	11.2
1950	115	26.1	6.1
1949	47	35.3	16.2
1948	59	33.4	15.8
1947	38	33.8	19.5
1946	23	38.7	17.9
1945	105	25.3	9.5
1944	92	27.5	10.7
1943	50	36.4	14.5
1942	96	26.8	11.0
1941	8	39.8	23.3
1940	30	34.0	20.8
1939	9	41.3	21.5
1938	48	33.2	18.2
1937	82	28.6	13.5
1936	26	37.2	18.7
1935	86	27.1	12.7
1934	93	27.4	10.5
1933	61	33.8	14.9
1932	80	30.1	12.5
1931	3	39.5	27.5
1930	57	33.2	16.1
1929	66	32.5	15.0
1928	39	35.4	17.8
1927	108	28.1	6.5
1926	81	29.3	12.9
1925	104	28.1	8.0
1924	118	24.0	6.3
1923	4	42.6	23.9
1922	65	34.5	13.3
1921	34	36.3	17.6
1920	52	33.5	17.2
1919	124	20.7	3.8
1918	12	37.8	23.4
1917	125	20.3	2.9
1916	113	28.0	5.2
1915	75	30.9	13.0
1914	119	24.9	4.9
1913	7	40.1	23.3
1912	29	38.0	16.7
1911	24	36.8	19.5
1910	73	31.3	13.0
1909	116	22.5	8.0
1908	49	36.2	14.7
1907	20	36.9	20.2
1906	32	35.1	18.9
1905	35	37.3	16.5
1904	71	34.3	10.7
1903	100	28.6	8.5
1902	88	27.8	11.3
1901	94	26.6	11.3
1900	41	34.8	17.9
1899	78	30.7	12.7
1898	111	26.9	6.9
1897	117	23.6	6.8
1896	19	37.3	20.1
1895	55	32.0	18.1

Weather Station Details

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