Sioux City, IA: December

31 December 2025: December 2025 averaged 26.4°F in Sioux City, IA, the warmest December since 2024, 53rd warmest of 137.

December 2025

Mean temperature: 26.4°F; Warmest since 2024; 53rd warmest of 137
Precipitation: 0.61 in; Driest since 2024; 65th driest of 137

A normal December in Sioux City, IA (1991 to 2020): a mean temperature of 25.8°F, between 17.7°F and 28.8°F in eight years of ten and 0.78 in of precipitation, between 0.18 in and 2.00 in in eight years of ten.

The mean temperature of every December in Sioux City, IA since 1889: 26.4°F in 2025; the highest is 35.2°F, in 1889.

Normal range, 17.7 to 28.8°F

Every year, ranked, as a table

Every December in Sioux City, IA from 1889 to 2025, 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
2025	26.4	53	38.1	30	14.6	78	0.61	73
2024	29	21	39.3	19	18.7	38	0.49	86
2023	32.9	3	42.7	4	23.1	8	1.59	19
2022	20.6	102	29.2	100	11.9	99	1.83	12
2021	31.6	10	43.7	2	19.6	27	0.65	69
2020	27.5	41	39.6	16	15.4	65	0.51	85
2019	27.1	44	35.7	48	18.5	39	1.96	7
2018	25.8	57	33.8	65	17.9	43	1.89	10
2017	23.5	79	34.3	62	12.7	93	0.39	98
2016	24.7	70	34.2	63	15.2	70	1.48	23
2015	31	12	38.5	26	23.4	6	2.86	2
2014	28.3	33	35.5	51	21.1	18	1.40	28
2013	18	116	28.8	108	7.1	123	0.18	126
2012	25.7	58	35.6	50	15.7	63	1.67	16
2011	26.5	52	38.2	29	14.9	76	0.78	59
2010	20.1	105	29.3	99	10.9	103	0.95	46
2009	17.8	118	25.9	122	9.7	114	2.38	5
2008	17	123	28.3	110	5.6	130	1.46	24
2007	18.7	113	27	115	10.5	109	1.70	15
2006	30.2	15	40.7	11	19.6	27	2.56	3
2005	21.1	97	29.1	102	13.1	91	0.77	61
2004	28.9	23	40	14	17.8	45	0.12	130
2003	28.3	33	36	45	20.7	22	0.55	80
2002	28.5	28	40.8	10	16.3	60	0.13	129
2001	28.5	28	39.3	19	17.8	45	0.45	89
2000	11.5	136	19.7	135	3.2	136	0.69	65
1999	28.7	26	40	14	17.5	47	0.35	101
1998	27.8	39	40.4	13	15.2	70	0.15	127
1997	28.4	31	36.4	44	20.5	23	0.20	123
1996	15.3	128	23	132	7.6	120	0.43	93
1995	25.6	60	34.6	61	16.6	57	0.31	107
1994	23.3	81	31.4	90	15.3	67	1.04	42
1993	25.6	60	34.7	59	16.4	59	0.53	82
1992	24	77	32.6	78	15.4	65	0.80	56
1991	28.8	25	36.7	41	21	20	0.87	51
1990	19.6	109	29.5	98	9.7	114	0.78	59
1989	14.3	131	24.4	127	4.2	135	0.40	96
1988	27.2	43	37.2	37	17.2	53	0.58	75
1987	28.9	23	36	45	21.7	15	0.48	87
1986	27	47	35.9	47	18.1	40	0.21	120
1985	13.8	132	23.1	131	4.5	134	0.52	83
1984	24.3	73	34.2	63	14.5	79	1.36	30
1983	6	137	13.4	137	-1.4	137	0.45	89
1982	26.2	54	35.2	57	17.3	51	2.23	6
1981	20.7	101	29	104	12.4	96	0.57	78
1980	24.3	73	33.4	70	15.3	67	0.22	118
1979	30.1	16	41.4	8	18.8	36	0.21	120
1978	15.4	127	25	124	5.9	129	0.80	56
1977	22.6	87	30.3	94	14.9	76	1.00	44
1976	19.3	111	31.6	86	7	124	0.39	98
1975	25.3	63	32.6	78	18	42	0.29	110
1974	24.7	70	33.6	67	15.9	62	0.52	83
1973	21.5	94	29	104	13.9	84	0.72	64
1972	18	116	26	121	9.9	113	1.92	9
1971	24.3	73	32.1	84	16.6	57	0.79	58
1970	22	89	32.6	78	11.4	102	1.07	41
1969	21.7	92	30.2	95	13.2	89	1.35	31
1968	19.4	110	27	115	11.7	101	1.96	7
1967	24.9	67	32.9	72	16.9	55	0.75	62
1966	23	85	32.9	72	13.2	89	0.82	53
1965	33	2	42.6	6	23.4	6	0.33	105
1964	18.8	112	28.2	111	9.4	118	0.82	53
1963	15.5	126	26.1	120	4.9	133	0.48	87
1962	25.3	63	35.4	52	15.2	70	0.28	112
1961	16.6	124	25.9	122	7.4	121	1.16	36
1960	25.2	65	35.3	56	15	74	0.24	117
1959	32.5	4	40.5	12	24.5	4	1.54	21
1958	21.8	91	33.8	65	9.7	114	0.22	118
1957	32.4	6	42.7	4	22.1	11	0.28	112
1956	27.7	40	37.8	35	17.5	47	0.42	94
1955	18.2	115	26.9	118	9.5	117	0.69	65
1954	27.9	37	36.5	43	19.3	31	0.12	130
1953	26.9	49	37.8	35	16	61	1.43	26
1952	23.3	81	32.8	74	13.7	86	0.58	75
1951	17.6	120	27	115	8.2	119	0.91	48
1950	20.8	99	31.2	91	10.5	109	0.34	103
1949	25.7	58	38.1	30	13.3	88	0.29	110
1948	21.2	96	31.5	89	10.8	106	0.90	49
1947	23.1	83	32.4	81	13.8	85	1.25	35
1946	26.6	51	38	32	15.3	67	0.56	79
1945	16	125	24.7	125	7.4	121	1.67	16
1944	21.7	92	30.9	92	12.5	94	0.38	100
1943	26	56	39	23	12.9	92	0.01	137
1942	19.8	108	28.7	109	10.9	103	0.82	53
1941	29	21	38.7	25	19.4	29	0.84	52
1940	27.4	42	35	58	19.7	26	1.15	38
1939	32.4	6	42.9	3	21.9	12	0.28	112
1938	28	36	37.1	38	18.8	36	0.45	89
1937	24.1	76	33.3	71	15	74	0.41	95
1936	27.1	44	34.7	59	19.4	29	1.16	36
1935	24.5	72	31.8	85	17.3	51	0.64	70
1934	22.2	88	30	96	14.3	80	0.63	71
1933	27	47	36.7	41	17.4	50	1.81	14
1932	20.5	103	29	104	12	98	0.45	89
1931	32.3	8	38.4	27	26.2	2	1.83	12
1930	28.7	26	35.7	48	21.6	16	0.30	109
1929	24.8	69	32.7	76	16.9	55	0.27	115
1928	29.9	19	38	32	21.8	14	0.14	128
1927	14.7	130	23.5	130	6	128	0.58	75
1926	21	98	27.9	112	14	82	1.14	39
1925	21.9	90	29.6	97	14.3	80	0.95	46
1924	13.3	134	21.1	134	5.6	130	1.87	11
1923	32.5	4	41.1	9	23.8	5	0.73	63
1922	23.1	83	32.7	76	13.5	87	0.07	133
1921	27.9	37	36.8	40	18.9	33	0.31	107
1920	24.9	67	31.6	86	18.1	40	1.40	28
1919	17.2	121	24.2	128	10.2	111	0.40	96
1918	32.2	9	39.6	16	24.8	3	1.34	32
1917	13.6	133	21.9	133	5.4	132	0.68	67
1916	17.2	121	27.6	113	6.7	125	1.50	22
1915	26.7	50	33.5	68	19.9	24	0.67	68
1914	15	129	23.7	129	6.3	126	1.44	25
1913	31	12	39	23	22.9	9	0.60	74
1912	29.1	20	39.3	19	19	32	0.55	80
1911	25.4	62	32.8	74	17.9	43	2.87	1
1910	23.5	79	31.6	86	15.5	64	0.32	106
1909	12.7	135	19.2	136	6.3	126	1.04	42
1908	27.1	44	35.4	52	18.9	33	0.34	103
1907	28.4	31	36.9	39	19.9	24	0.90	49
1906	25	66	32.4	81	17.5	47	0.99	45
1905	28.5	28	38	32	18.9	33	0.07	133
1904	23.7	78	33.5	68	14	82	0.20	123
1903	21.4	95	32.2	83	10.6	108	0.21	120
1902	17.7	119	24.7	125	10.7	107	1.43	26
1901	20	106	27.4	114	12.5	94	0.63	71
1900	28.2	35	35.4	52	21.1	18	0.35	101
1899	23	85	30.8	93	15.1	73	1.27	34
1898	20.4	104	28.9	107	11.9	99	0.06	135
1897	18.3	114	26.6	119	10	112	1.64	18
1896	30.1	16	39.2	22	20.9	21	0.25	116
1895	26.2	54	35.4	52	17.1	54	0.02	136
1894	30.1	16	38.4	27	21.9	12	1.30	33
1893	20	106	29.1	102	10.9	103	1.57	20
1892	20.8	99	29.2	100	12.4	96	0.20	123
1891	30.9	14	39.5	18	22.3	10	2.48	4
1890	31.5	11	41.8	7	21.2	17	0.10	132
1889	35.2	1	44.1	1	26.3	1	1.14	39

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1889	35.2
1965	33
2023	32.9
1959	32.5
1923	32.5
1957	32.4
1939	32.4
1931	32.3
1918	32.2
2021	31.6

Coldest
Year	Mean, °F
1983	6
2000	11.5
1909	12.7
1924	13.3
1917	13.6
1985	13.8
1989	14.3
1927	14.7
1914	15
1996	15.3

Wettest
Year	Precipitation, in
1911	2.87
2015	2.86
2006	2.56
1891	2.48
2009	2.38
1982	2.23
2019	1.96
1968	1.96
1972	1.92
2018	1.89

Driest
Year	Precipitation, in
1943	0.01
1895	0.02
1898	0.06
1922	0.07
1905	0.07
1890	0.10
2004	0.12
1954	0.12
2002	0.13
1928	0.14

The hottest, coldest and wettest days

Hottest day: 55°F; 31 December 2025
Coldest night: -15°F; 14 December 2025
Wettest day: 0.25 in; 13 December 2025

Every month, season and year

Months

Seasons

Years

Sioux City, IA the day's answers

All-time records

Every answer in words

December 2025 brought 0.61 in of precipitation in Sioux City, IA, the driest December since 2024, 65th driest of 137.
The hottest day of December 2025 in Sioux City, IA: 55°F on Wednesday 31 December 2025.
The coldest night of December 2025 in Sioux City, IA: a low of -15°F on Sunday 14 December 2025.
The wettest day of December 2025 in Sioux City, IA: 0.25 in on Saturday 13 December 2025.