Spencer, IA: December

31 December 2025: December 2025 averaged 20.5°F in Spencer, IA, the coldest December since 2022, tied 47th coldest of 108 (with 1984 and 1971).

December 2025

Mean temperature: 20.5°F; Coldest since 2022; 47th coldest of 108
Precipitation: 0.54 in; Driest since 2024; 49th driest of 107

A normal December in Spencer, IA (1991 to 2020): a mean temperature of 23.6°F, between 13.5°F and 26.4°F in eight years of ten and 0.50 in of precipitation, between 0.05 in and 1.08 in in eight years of ten.

The mean temperature of every December in Spencer, IA since 1896: 20.5°F in 2025; the lowest is 3.3°F, in 1983.

Normal range, 13.5 to 26.4°F

Every year, ranked, as a table

Every December in Spencer, IA from 1896 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	Days missing
2025	20.5	60	31.3	49	9.7	73	0.54	59	0
2024	27.3	14	36.3	19	18.3	16	0.35	76	0
2023	32.9	1	42.8	1	22.9	2	1.34	17	0
2022	19.8	66	27.3	73	10.7	62	2.44	1	2
2021	27.5	13	38.5	5	16.6	26	0.46	65	0
2020	25.5	25	37.5	9	13.7	42	0.03	105	1
2019	24	37	32.6	38	15.5	32	0.97	33	0
2018	24.7	31	32.2	43	17.1	21	0.74	42	0
2017	20.7	59	30.6	50	10.9	61	0.05	104	0
2016	21.2	56	29.6	61	12.7	50	1.07	28	0
2015	26.4	18	33.2	33	19.6	7	1.90	5	0
2014	26	19	33	35	19	12	0.82	38	0
2013	13.1	97	23.1	94	3.1	97	0.02	106	0
2012	23.8	40	33.8	30	13.7	42	0.79	40	0
2011	25.3	27	36.3	19	14.4	38	1.21	22	0
2010	16.1	82	24.6	90	7.7	77	1.13	24	0
2009	14.2	93	23	95	5.3	87	0.27	82	0
2008	13.5	94	24.5	91	2.5	99	0.24	87	0
2007	16.1	82	24.5	91	7.7	77	0.55	58	0
2006	28.8	8	38	7	19.5	8	1.02	32	0
2005	17.1	79	23.6	93	10.5	66	0.18	93	0
2004	25.7	22	35.5	23	15.9	29	0.06	103	0
2003	24.5	33	32.4	40	16.6	26	0.26	83	1
2002	25.6	23	37.1	15	14.1	41	0.11	98	0
2001	26.8	15	36.6	17	17	22	0.23	88	0
2000	6.1	107	15	107	-2.8	106	0.12	97	0
1999	23.4	44	35.6	22	11.1	59	0.29	81	0
1998	25	29	37.2	14	12.8	49	0.02	106	0
1997	26.5	17	32.6	38	20.3	5	0.25	85	1
1996	12.8	99	19.9	104	5	88	0.65	50	1
1995	22.7	47	30.1	58	15.5	32	0.44	69	1
1994	23	46	30.5	51	15.4	34	0.64	51	0
1993	21.3	55	29.5	62	13.2	45	0.84	37	0
1992	21	57	28.9	66	13.2	45	0.70	46	0
1991	24.2	36	31.5	45	16.9	24	0.67	48	0
1990	15	88	25.7	83	4.2	91	0.67	48	0
1989	11.7	102	21.5	101	1.9	100	0.09	99	0
1988	20.1	64	30.2	57	10	71	0.19	92	0
1987	25.2	28	32.1	44	18.4	14	0.56	57	0
1986	24	37	32.3	42	15.7	30	0.23	88	0
1985	7.5	106	18.6	106	-3.6	107	0.68	47	0
1984	20.5	60	30.3	54	10.7	62	1.51	14	0
1983	3.3	108	10.5	108	-3.8	108	0.47	62	1
1982	25.4	26	33.4	32	17	22	1.82	6	2
1979	28.1	10	38.5	5	17.6	19	0.09	99	0
1976	14.7	90	25.8	81	3.7	95	0.58	55	0
1975	23.5	42	30.5	51	16.6	26	0.22	90	0
1974	22.3	49	31.5	45	13.2	45	0.32	79	0
1973	18.2	73	25.9	79	10.5	66	1.06	30	0
1972	12	101	21.4	102	2.7	98	1.54	11	0
1971	20.5	60	27.8	70	13.1	48	0.47	62	0
1970	17.2	78	27.6	72	6.9	82	0.48	61	1
1969	19.2	69	27.7	71	10.6	64	1.53	12	0
1968	18.1	74	25.9	79	10.3	69	1.29	19	0
1966	20.1	64	29.1	64	11	60	0.79	40	0
1965	29.6	7	37.7	8	21.5	4	0.47	62	0
1964	16.1	82	25.8	81	6.4	85	1.24	21	0
1963	11.5	104	23	95	1.2	103	0.45	67	2
1962	22	51	32.4	40	11.6	57	0.25	85	0
1961	15.3	87	25.5	85	5	88	1.10	26	0
1960	20.2	63	30.3	54	10.2	70	0.90	35	0
1959	29.9	5	37.3	12	22.5	3	1.75	8	0
1958	16.4	81	28.8	67	3.9	93	0.20	91	0
1957	27.7	11	37.5	9	17.9	17	0.46	65	0
1956	24.6	32	34.8	24	14.4	38	0.33	78	0
1955	13.2	96	23	95	3.3	96	0.80	39	1
1954	24.9	30	33	35	16.8	25	0.26	83	0
1953	23.5	42	34.6	25	12.3	54	1.03	31	0
1952	21.6	53	30.5	51	12.6	53	0.36	74	0
1951	14.9	89	24.7	88	5.5	86	0.71	45	1
1950	14.3	91	24.8	87	3.8	94	0.35	76	1
1949	22	51	33.6	31	10.5	66	0.40	72	3
1948	19.5	67	30.3	54	8.8	76	0.62	52	2
1947	17.4	77	28.1	68	6.7	83	0.59	54	0
1946	23.2	45	34.5	26	11.9	56			0
1945	12.9	98	20.8	103	4.9	90	1.76	7	0
1944	21	57	29.4	63	12.7	50	0.13	95	0
1943	25.6	23	36.3	19	14.2	40	0.07	102	1
1942	16.6	80	25.7	83	7.5	79	1.10	26	0
1941	28.5	9	37.5	9	19.5	8	1.14	23	0
1940	24.3	35	31.4	48	17.3	20	1.07	28	0
1939	30.5	2	41.2	3	19.8	6	0.41	71	0
1938	23.8	40	32.9	37	14.7	36	0.73	43	0
1937	18.8	70	27	74	10.6	64	1.11	25	0
1936	24.5	33	33.2	33	15.7	30	1.26	20	0
1935	19.3	68	27	74	11.4	58	1.61	9	1
1934	18	75	26.1	77	9.8	72	0.58	55	0
1933	22.2	50	31.5	45	12.1	55	1.30	18	2
1932	17.9	76	26.7	76	9	75	0.53	60	0
1931	30.5	2	37.3	12	23.7	1	2.38	2	0
1930	26	19	34.2	29	17.9	17	0.13	95	0
1929	21.4	54	30	60	12.7	50	0.42	70	0
1928	27.6	12	36.8	16	18.4	14	0.60	53	0
1927	12.1	100	22.5	99	1.7	101	1.52	13	0
1926	16	86	25.5	85	6.5	84	2.03	4	0
1925	18.5	71	28	69	9.4	74	1.55	10	1
1924	9.6	105	18.7	105	0.5	105	1.50	15	0
1923	30.3	4	41.3	2	19.4	10	0.72	44	0
1922	18.3	72	29.1	64	7.5	79	0.15	94	0
1921	26	19	36.4	18	13.6	44	0.45	67	2
1920	22.5	48	30.1	58	14.8	35	0.85	36	0
1919	13.3	95	22.1	100	4.2	91	0.40	72	1
1914	11.7	102	22.6	98	0.6	104	1.49	16	2
1913	29.9	5	41	4	18.8	13	0.08	101	0
1911	24	37	34.3	28	14.5	37	2.30	3	2
1898	14.3	91	26.1	77	1.7	101	0.32	79	2
1897	16.1	82	24.7	88	7.4	81	0.93	34	1
1896	26.8	15	34.5	26	19.1	11	0.36	74	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2023	32.9
1939	30.5
1931	30.5
1923	30.3
1959	29.9
1913	29.9
1965	29.6
2006	28.8
1941	28.5
1979	28.1

Coldest
Year	Mean, °F
1983	3.3
2000	6.1
1985	7.5
1924	9.6
1963	11.5
1989	11.7
1914	11.7
1972	12
1927	12.1
1996	12.8

Wettest
Year	Precipitation, in
2022	2.44
1931	2.38
1911	2.30
1926	2.03
2015	1.90
1982	1.82
1945	1.76
1959	1.75
1935	1.61
1925	1.55

Driest
Year	Precipitation, in
2013	0.02
1998	0.02
2020	0.03
2017	0.05
2004	0.06
1943	0.07
1913	0.08
1989	0.09
1979	0.09
2002	0.11

The hottest, coldest and wettest days

Hottest day: 44°F; 27 December 2025
Coldest night: -19°F; 4 December 2025
Wettest day: 0.20 in; 6 December 2025

Every month, season and year

Months

Seasons

Years

Spencer, IA the day's answers

All-time records

Every answer in words

December 2025 brought 0.54 in of precipitation in Spencer, IA, the driest December since 2024, 49th driest of 107.
The hottest day of December 2025 in Spencer, IA: 44°F on Saturday 27 December 2025.
The coldest night of December 2025 in Spencer, IA: a low of -19°F on Thursday 4 December 2025.
The wettest day of December 2025 in Spencer, IA: 0.20 in on Saturday 6 December 2025.