Waterloo, IA: January

31 January 2026: January 2026 averaged 16.2°F in Waterloo, IA, the coldest January since 2022, 48th coldest of 130.

January 2026

Mean temperature: 16.2°F; Coldest since 2022; 48th coldest of 130
Precipitation: 1.61 in; Wettest since 2024; 21st wettest of 131

A normal January in Waterloo, IA (1991 to 2020): a mean temperature of 18.1°F, between 11.8°F and 24.1°F in eight years of ten and 0.94 in of precipitation, between 0.57 in and 1.67 in in eight years of ten.

The mean temperature of every January in Waterloo, IA since 1896: 16.2°F in 2026; the lowest is -0.1°F, in 1977.

Normal range, 11.8 to 24.1°F

Every year, ranked, as a table

Every January in Waterloo, IA from 1895 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	16.2	83	24.7	87	7.7	75	1.61	21	0
2025	20.2	45	31	26	9.4	62	0.10	126	0
2024	21.9	31	27.9	60	15.9	19	2.61	7	0
2023	23.3	23	30.5	32	16.1	16	2.02	13	0
2022	12.7	105	23.4	98	2.1	107	0.59	91	0
2021	21.7	32	29.7	44	13.6	30	1.41	34	0
2020	23.1	25	30.7	29	15.6	21	1.38	38	0
2019	15.6	87	24.7	87	6.5	83	1.52	27	0
2018	17.7	72	27.8	61	7.5	77	2.24	9	0
2017	23.6	21	29.5	48	17.6	10	2.89	3	0
2016	18.7	59	25.8	80	11.6	37	0.78	72	0
2015	20.6	42	29.7	44	11.5	38	1.00	57	0
2014	10	114	21.2	111	-1.1	117	0.66	85	0
2013	21	37	31	26	11	48	1.30	40	0
2012	24	20	34.6	13	13.3	32	1.39	36	0
2011	13.7	96	21.7	109	5.7	88	1.11	49	0
2010	12.2	108	18.9	117	5.5	92	0.84	64	0
2009	10.9	112	20.9	112	0.9	112	0.74	77	0
2008	14.5	92	23.2	99	5.8	87	0.87	63	0
2007	20.1	47	29	52	11.1	46	0.73	79	0
2006	30.8	2	38.8	5	22.8	1	0.76	74	0
2005	17.6	73	25.5	81	9.7	59	1.42	33	0
2004	16.6	80	25.4	82	7.8	74	0.46	101	0
2003	19.9	49	29.8	42	10	57	0.37	112	0
2002	29.8	3	40.3	2	19.4	5	0.44	106	0
2001	18.5	61	27.5	66	9.5	60	1.10	51	0
2000	19.9	49	29.1	50	10.6	51	1.08	53	0
1999	15	90	23.6	95	6.5	83	1.61	21	0
1998	22.6	26	29.3	49	15.9	19	0.78	72	0
1997	13.7	96	22.4	103	4.9	95	0.80	69	0
1996	14.9	91	26.2	76	3.7	101	2.19	10	0
1995	17.9	70	24.9	86	10.8	49	0.80	69	0
1994	7.4	121	16.7	122	-1.9	119	1.22	45	0
1993	18.3	64	27.1	67	9.5	60	0.58	92	0
1992	25.1	13	33.6	17	16.7	12	1.06	55	0
1991	11.9	110	22.3	104	1.5	109	0.76	74	0
1990	29.1	4	39.3	4	19	6	0.46	101	0
1989	27.2	7	34.8	10	19.5	4	1.09	52	0
1988	13.2	99	22.5	102	3.9	100	0.75	76	0
1987	21.5	34	30	38	13	34	0.47	99	0
1986	19.3	53	28.4	56	10.3	56	0.40	110	0
1985	12.6	106	22.3	104	2.8	105	0.61	89	0
1984	16.1	84	23.6	95	8.5	73	0.62	88	0
1983	24.1	18	31.6	21	16.5	14	0.84	64	0
1982	3.6	126	12.4	129	-5.3	127	1.51	28	0
1981	19.3	53	31	26	7.5	77	0.23	121	0
1980	19	56	26.8	69	11.2	45	1.34	39	0
1979	3.6	126	11.8	130	-4.6	126	1.41	34	0
1978	2.7	128	12.5	128	-7.2	128	0.51	96	0
1977	-0.1	130	11.7	131	-11.9	130	0.37	112	0
1976	16.5	81	28.4	56	4.7	96	0.18	122	0
1975	18.5	61	27.6	65	9.4	62	0.92	61	0
1974	17.1	76	23.9	93	10.4	55	0.98	59	0
1973	18.8	57	26.7	71	10.8	49	1.16	47	0
1972	10.2	113	19.8	115	0.6	113	0.26	120	0
1971	7.6	120	16.5	123	-1.2	118	1.76	16	0
1970	5.2	125	14.2	126	-3.8	124	0.18	122	0
1969	12.9	103	20.1	114	5.6	91	1.56	23	0
1968	18	68	26.7	71	9.2	65	0.73	79	0
1967	20.2	45	29.8	42	10.6	51	1.53	25	0
1966	7.7	119	18.3	118	-2.8	122	1.70	19	0
1965	13.9	95	23.1	100	4.7	96	1.11	49	0
1964	24.3	17	34.5	14	14.2	27	0.34	115	0
1963	6.8	123	15.7	124	-2	120	0.49	98	0
1962	11.6	111	21.3	110	1.9	108	0.10	126	0
1961	15.9	86	26.2	76	5.7	88	0.31	117	0
1960	19.6	52	28.1	58	11.1	46	2.04	12	0
1959	13	102	23	101	2.9	104	0.52	95	0
1958	21.6	33	28.6	53	14.6	26	0.40	110	0
1957	12	109	21.8	108	2.2	106	0.42	107	0
1956	16.3	82	26.5	74	6.1	86	0.41	108	0
1955	19.1	55	26.8	69	11.4	39	0.41	108	0
1954	18.6	60	30	38	7.2	80	0.10	126	0
1953	22	29	29.7	44	14.2	27	0.58	92	0
1952	18.8	57	29.1	50	9	67	1.97	14	1
1951	14.5	92	23.5	97	5.5	92	0.10	126	0
1950	18.3	64	30.1	37	6.5	83	1.53	25	0
1949	18.3	64	27.7	64	8.8	70	2.78	4	0
1948	16.8	78	26.7	71	6.9	81	0.02	131	0
1947	24.5	16	33.9	15	15.1	24	1.49	29	0
1946	20.7	41	30	38	11.4	39	3.02	1	0
1945	17.1	76	25.2	84	9	67	0.45	104	0
1944	28.7	5	39.5	3	17.9	8	1.30	40	0
1943	15.4	88	25.1	85	5.7	88	1.14	48	0
1942	18.5	61	27.8	61	9.2	65	1.23	44	0
1941	23.4	22	30.6	31	16.1	16	1.71	18	0
1940	9.4	116	18.1	120	0.6	113	0.99	58	0
1939	27.6	6	35.4	8	19.8	3	0.91	62	0
1938	17.9	70	27	68	8.7	71	1.25	43	0
1937	12.6	106	23.9	93	1.4	110	1.55	24	0
1936	8.5	118	17.7	121	-0.7	116	1.39	36	0
1935	17.6	73	26.3	75	8.9	69	1.70	19	0
1934	25.6	10	33.7	16	17.4	11	1.20	46	0
1933	31	1	40.6	1	21.5	2	0.73	79	0
1932	22.3	27	29.9	41	14.7	25	2.10	11	0
1931	27.2	7	36.6	6	17.8	9	0.65	86	0
1930	9.1	117	20.2	113	-2	120	1.26	42	0
1929	7.4	121	18.2	119	-3.3	123	2.63	6	0
1928	23.2	24	32.7	18	13.8	29	0.15	125	0
1927	20	48	28.6	53	11.4	39	0.46	101	0
1926	21	37	30.7	29	11.4	39	0.80	69	0
1925	21	37	30.5	32	11.4	39	0.08	130	0
1924	13.7	96	24.4	91	3.1	103	0.81	68	0
1923	24.7	15	32.7	18	16.6	13	0.64	87	0
1922	17.3	75	28.1	58	6.6	82	0.47	99	0
1921	27.1	9	35.4	8	18.9	7	0.27	118	0
1920	13.2	99	22	106	4.3	99	0.34	115	0
1919	25.1	13	34.8	10	15.5	22	0.45	104	0
1918	5.8	124	15.5	125	-3.8	124	0.84	64	0
1917	13.1	101	24.7	87	1.4	110	1.03	56	0
1916	16.7	79	25.9	79	7.5	77	2.77	5	0
1915	14.5	92	24.4	91	4.6	98	1.75	17	0
1914	25.6	10	34.8	10	16.5	14	0.83	67	0
1913	19.8	51	30.2	36	9.3	64	0.57	94	0
1912	1.6	129	12.6	127	-9.7	129	0.73	79	3
1911			30.3	35			0.60	90	6
1910	15.3	89	25.4	82	5.2	94	1.49	29	0
1909	20.9	40	31.3	23	10.5	53	2.61	7	0
1908	25.6	10	35.9	7	15.3	23	0.37	112	0
1907	18	68	26	78	9.9	58	1.43	32	0
1906	22.3	27	31.3	23	13.3	32	2.94	2	0
1905	9.8	115	19.4	116	0.2	115	0.74	77	0
1904	12.8	104	21.9	107	3.7	101	0.71	83	0
1903	21.5	34	29.6	47	13.4	31	0.17	124	0
1902	20.5	44	30.4	34	10.5	53	0.93	60	0
1901	22	29	31.6	21	12.3	36	1.07	54	0
1900	24.1	18	32.2	20	16	18	0.70	84	0
1899	18.3	64	27.8	61	8.7	71	0.27	118	0
1898	21.3	36	31.3	23	11.3	44	1.45	31	0
1897	16.1	84	24.6	90	7.6	76	1.78	15	0
1896	20.6	42	28.5	55	12.7	35	0.51	96	0
1895									20

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1933	31
2006	30.8
2002	29.8
1990	29.1
1944	28.7
1939	27.6
1989	27.2
1931	27.2
1921	27.1
1934	25.6
More years share the last value

Coldest
Year	Mean, °F
1977	-0.1
1912	1.6
1978	2.7
1982	3.6
1979	3.6
1970	5.2
1918	5.8
1963	6.8
1994	7.4
1929	7.4

Wettest
Year	Precipitation, in
1946	3.02
1906	2.94
2017	2.89
1949	2.78
1916	2.77
1929	2.63
2024	2.61
1909	2.61
2018	2.24
1996	2.19

Driest
Year	Precipitation, in
1948	0.02
1925	0.08
2025	0.10
1962	0.10
1954	0.10
1951	0.10
1928	0.15
1903	0.17
1976	0.18
1970	0.18

The hottest, coldest and wettest days

Hottest day: 49°F; 13 January 2026, 12 January 2026
Coldest night: -18°F; 23 January 2026
Wettest day: 1.28 in; 8 January 2026

Every month, season and year

Months

Seasons

Years

Waterloo, IA the day's answers

All-time records

Every answer in words

January 2026 brought 1.61 in of precipitation in Waterloo, IA, the wettest January since 2024, tied 21st wettest of 131 (with 1999).
The hottest day of January 2026 in Waterloo, IA: 49°F on Tuesday 13 January 2026 and Monday 12 January 2026.
The coldest night of January 2026 in Waterloo, IA: a low of -18°F on Friday 23 January 2026.
The wettest day of January 2026 in Waterloo, IA: 1.28 in on Thursday 8 January 2026.