Alamosa, CO: December

31 December 2025: December 2025 averaged 29.3°F in Alamosa, CO, the warmest December on record, in 93 years since 1932 (1939 excluded: 9 of 31 days missing); provisional.

December 2025

Mean temperature: 29.3°F; Warmest on record; Warmest of 93, provisional
Precipitation: 0.15 in; Driest since 2024; 35th driest of 94

A normal December in Alamosa, CO (1991 to 2020): a mean temperature of 19.2°F, between 8.5°F and 23.6°F in eight years of ten and 0.25 in of precipitation, between 0.04 in and 0.83 in in eight years of ten.

The mean temperature of every December in Alamosa, CO since 1932: 29.3°F in 2025, the highest of them all.

Normal range, 8.5 to 23.6°F

Every year, ranked, as a table

Every December in Alamosa, CO from 1932 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	29.3	1	47.7	2	11	2	0.15	56	0
2024	25.4	8	45.4	7	5.5	14	0.13	62	0
2023	21.6	29	38.8	37	4.4	23	0.40	30	0
2022	23.5	17	42.3	16	4.6	21	0.02	85	0
2021	26.1	5	45.6	6	6.5	6	0.03	81	0
2020	17.3	63	36.2	58	-1.5	66	0.36	37	0
2019	16.6	65	33.1	68	0.2	55	0.51	21	0
2018	20.1	39	38	45	2.2	42	0.32	40	0
2017	25.5	7	47	3	3.9	25	0.14	61	0
2016	18.2	60	34.9	63	1.5	46	1.08	5	0
2015	21.7	26	38.5	41	5	19	0.25	46	0
2014	22.5	22	38.9	36	6	10	0.21	49	0
2013	7.3	90	23.6	91	-9.1	90	0.17	52	0
2012	11.6	83	31.7	71	-8.5	88	0.81	8	0
2011	14.1	74	30.5	79	-2.2	70	0.27	42	0
2010	28	3	44.7	8	11.4	1	0.38	33	0
2009	16.1	67	33.6	67	-1.4	64	0.10	70	0
2008	19.6	46	35.4	62	3.7	28	0.48	24	0
2007	12.3	81	27.6	86	-3	74	1.21	3	0
2006	19.3	51	36.1	59	2.4	39	0.62	15	0
2005	21.2	32	41.7	20	0.7	51	0.04	77	0
2004	20	42	39.1	35	0.9	49	0.26	44	0
2003	19	53	36.6	54	1.4	47	0.30	41	0
2002	18.8	55	34.2	65	3.4	30	0.24	48	0
2001	19	53	36.3	57	1.6	45	0.13	62	0
2000	21.7	26	40.3	26	3.2	34	0.11	67	0
1999	20	42	39.5	32	0.6	53	0.03	81	0
1998	23.6	15	42	18	5.2	17	0.01	88	0
1997	8.6	88	24.4	90	-7.1	83	0.19	50	0
1996	21.5	30	38.7	38	4.3	24	trace	90	0
1995	23.6	15	41.5	21	5.7	11	0.13	62	0
1994	22.6	20	38.3	43	6.9	5	0.07	73	0
1993	18.5	57	37.1	51	-0.2	58	0.10	70	0
1992	6.7	91	24.5	89	-11.1	93	0.79	10	0
1991	5.1	93	20.8	93	-10.5	92	0.98	7	0
1990	13.3	77	31.5	74	-4.9	80	0.75	12	0
1989	19.5	48	40.5	25	-1.4	64	0.15	56	0
1988	17.8	61	36.9	52	-1.3	63	0.11	67	0
1987	14.7	72	29.4	82	-0.1	57	0.51	21	0
1986	20.4	38	36.8	53	3.9	25	0.12	66	0
1985	17.4	62	35.5	61	-0.7	62	0.37	36	0
1984	20.1	39	37.2	50	3	35	0.59	16	0
1983	13.8	75	29.7	81	-2.2	70	0.99	6	0
1982	20.9	33	36.5	55	5.3	16	0.49	23	0
1981	20.6	37	40.1	27	1.2	48	0.33	39	0
1980	28.1	2	48.6	1	7.6	3	trace	90	0
1979	18.5	57	37.6	48	-0.6	61	0.55	19	0
1978	8	89	25	88	-9	89	0.81	8	0
1977	24.4	12	43.5	12	5.4	15	0.17	52	0
1976	13.3	77	34.1	66	-7.5	86	0.07	73	0
1975	16.9	64	33	69	0.7	51	0.04	77	0
1974	13.2	79	30.9	77	-4.5	77	0.74	13	0
1973	20.7	36	39.6	31	1.8	44	0.19	50	0
1972	10.1	86	27.6	86	-7.3	85	0.46	25	0
1971	15.8	69	31.4	75	0.1	56	0.45	27	0
1970	22.9	19	42.3	16	3.4	30	0.03	81	0
1969	19.5	48	36.5	55	2.6	38	0.41	29	0
1968	16.1	67	35.8	60	-3.5	76	0.38	33	0
1967	11.5	84	27.9	84	-4.8	79	1.20	4	0
1966	20.9	33	38	45	3.8	27	0.35	38	0
1965	22.4	23	38.5	41	6.2	8	0.76	11	0
1964	6.6	92	23.4	92	-10.3	91	1.52	1	0
1963	18.4	59	39.4	33	-2.6	72	0.04	77	0
1962	25.2	9	44.3	11	6.1	9	0.15	56	0
1961	11.8	82	30.3	80	-6.6	82	0.57	18	0
1960	14.4	73	31.6	72	-2.8	73	0.58	17	1
1959	24	14	40.9	23	7.1	4	0.26	44	0
1958	26.3	4	46.1	5	6.5	6	0.02	85	0
1957	19.8	45	37.3	49	2.4	39	0.01	88	0
1956	20.1	39	40.6	24	-0.4	60	trace	90	0
1955	24.7	10	44.4	9	5.1	18	0.04	77	0
1954	19.1	52	40.1	27	-1.8	67	0.13	62	0
1953	15.2	70	32.5	70	-2.1	69	0.39	31	0
1952	10.6	85	28.4	83	-7.2	84	0.15	56	0
1951	18.8	55	34.4	64	3.3	33	0.38	33	0
1950	24.5	11	44.4	9	4.7	20	0.11	67	0
1949	19.5	48	38.6	40	0.3	54	trace	90	0
1948	22.3	24	39.9	29	4.6	21	0.17	52	0
1947	14.9	71	31.6	72	-1.8	67	0.52	20	0
1946	26	6	46.3	4	5.7	11	0.02	85	0
1945	16.6	65	38.1	44	-4.6	78	0.05	76	1
1944	19.6	46	39.4	33	-0.2	58	0.17	52	0
1943	9.8	87	27.8	85	-8.3	87	1.27	2	0
1942	21.9	25	42.9	13	0.8	50	0.27	42	0
1941	20.8	35	38.7	38	2.8	37	0.39	31	0
1940	13.7	76	30.8	78	-3.3	75	0.44	28	0
1939							0.25	46	9
1938	22.6	20	41.8	19	3.4	30	0.15	56	0
1937	24.2	13	42.8	14	5.7	11	0.10	70	0
1936	23.1	18	42.5	15	3.6	29	0.03	81	0
1935	21.4	31	39.7	30	3	35	trace	90	0
1934	21.7	26	41.2	22	2.3	41	0.07	73	0
1933	19.9	44	37.7	47	2.1	43	0.73	14	0
1932	13.1	80	31.3	76	-5.2	81	0.46	25	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2025	29.3
1980	28.1
2010	28
1958	26.3
2021	26.1
1946	26
2017	25.5
2024	25.4
1962	25.2
1955	24.7

Coldest
Year	Mean, °F
1991	5.1
1964	6.6
1992	6.7
2013	7.3
1978	8
1997	8.6
1943	9.8
1972	10.1
1952	10.6
1967	11.5

Wettest
Year	Precipitation, in
1964	1.52
1943	1.27
2007	1.21
1967	1.20
2016	1.08
1983	0.99
1991	0.98
2012	0.81
1978	0.81
1992	0.79

Driest
Year	Precipitation, in
1996	trace
1980	trace
1956	trace
1949	trace
1935	trace
1998	0.01
1957	0.01
2022	0.02
1958	0.02
1946	0.02

The hottest, coldest and wettest days

Hottest day: 63°F; 19 December 2025
Coldest night: -2°F; 5 December 2025
Wettest day: 0.14 in; 3 December 2025

Every month, season and year

Months

Seasons

Years

Alamosa, CO the day's answers

All-time records

Every answer in words

December 2025 brought 0.15 in of precipitation in Alamosa, CO, the driest December since 2024, tied 35th driest of 94 (with 1989, 1962, 1952 and 1 other year).
The hottest day of December 2025 in Alamosa, CO: 63°F on Friday 19 December 2025.
The coldest night of December 2025 in Alamosa, CO: a low of -2°F on Friday 5 December 2025.
The wettest day of December 2025 in Alamosa, CO: 0.14 in on Wednesday 3 December 2025.