Boise December 21 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of December 21.

December 21 All-Time Records
1940–2022

60 °F

-23 °F

-3 °F

Highest daily low

46 °F

0.8 inches

3.1 inches

December 21 Average Weather
1991–2020 ¹

Average high

38.0 °F

Average low

24.5 °F

Chance precipitation

38.6%

Chance snow

17.8%

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2021	42	25	0.00	0.0
2020	58	43	0.00	0.0
2019	50	40	0.00	0.0
2018	41	29	0.01	0.0
2017	35	22	0.00	0.0
2016	30	11	0.00	0.0
2015	45	34	0.11	0.0
2014	47	40	0.76	0.0
2013	30	21	0.02	0.2
2012	46	39	0.00	0.0
2011	42	18	0.00	0.0
2010	42	28	0.00	0.0
2009	48	34	0.00	0.0
2008	36	24	0.11	2.5
2007	35	22	0.00	0.0
2006	28	19	0.09	0.9
2005	49	32	0.28	0.0
2004	36	20	0.00	0.0
2003	45	30	0.02	0.0
2002	42	33	0.11	0.0
2001	36	25	0.00	0.0
2000	44	29	0.00	0.0
1999	47	25	0.00	0.0
1998	13	-2	0.00	0.0
1997	37	22	0.00	0.0
1996	35	18	0.02	0.3
1995	36	24	0.00	0.0
1994	37	26	0.00	0.0
1993	31	26	0.00	0.0
1992	36	31	0.00	0.0
1991	34	17	0.00	0.0
1990	-3	-23	0.01	0.1
1989	46	17	0.00	0.0
1988	39	29	0.23	3.1
1987	42	31	0.00	0.0
1986	27	21	0.00	0.0
1985	13	-3	0.00	0.0
1984	16	-1	0.04	0.3
1983	14	-8	0.01	0.0
1982	52	41	0.03	0.0
1981	45	32	0.33	0.0
1980	47	27	0.09	0.0
1979	46	36	0.17	0.0
1978	41	29	0.02	0.2
1977	35	23	0.00	0.0
1976	35	8	0.00	0.0
1975	21	17	0.00	0.0
1974	53	32	0.00	0.0
1973	48	38	0.13	0.0
1972	51	46	0.00	0.0
1971	44	37	0.00	0.0
1970	35	30	0.00	0.0
1969	59	39	0.15	0.0
1968	25	6	0.00	0.0
1967	28	8	0.02	0.4
1966	36	22	0.00	0.0
1965	26	11	0.00	0.0
1964	60	40	0.11	0.0
1963	31	20	0.00	0.0
1962	35	29	0.00	0.0
1961	48	32	0.00	0.0
1960	39	22	0.00	0.0
1959	36	16	0.00	0.0
1958	53	36	0.10	0.0
1957	54	34	0.02	0.0
1956	34	18	0.08	1.2
1955	55	45	0.08	0.0
1954	31	12	0.00	0.0
1953	43	27	0.00	0.0
1952	38	27	0.00	0.0
1951	37	23	0.14	1.4
1950	40	27	0.00	0.0
1949	33	21	0.00	0.0
1948	28	11	0.00	0.0
1947	46	29	0.06	0.0
1946	46	27	0.00	0.0
1945	39	19	0.15	2.2
1944	41	30	0.02	0.0
1943	36	32	0.00	0.0
1942	41	23	0.00	0.0
1941	41	28	0.00	0.0
1940	54	37	0.03	0.0

All-Time Highest Temperatures in Boise on December 21

All-Time Lowest Temperatures in Boise on December 21

Lowest High Temperatures in Boise on December 21

All-Time Most Precipitation in Boise on December 21

All-Time Most Snow in Boise on December 21

Weather Station Details

Years	Station	Coordinates
1940–2022		location