Boise December 20 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of December 20.

December 20 All-Time Records 1911–2024
Highest temperature	57 °F	1964
Lowest temperature	-8 °F	1990
Lowest daily high	9 °F	1990
Highest daily low	43 °F	1955
Most precipitation	0.71 inches	2014
Most snow	9.8 inches	1996

December 20 All-Time Records
1911–2024

Highest temperature

57 °F

-8 °F

9 °F

Highest daily low

43 °F

0.71 inches

9.8 inches

December 20 Average Weather 1991–2020 ¹
Average high	38.1 °F
Average low	24.6 °F
Chance precipitation	38.9%
Chance snow	17.7%

December 20 Average Weather
1991–2020 ¹

Average high

38.1 °F

Average low

24.6 °F

Chance precipitation

38.9%

Chance snow

17.7%

Boise December 20 Weather by Year

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	42	31	0.00	0.0
2022	38	18	0.00	0.0
2021	50	30	0.00	0.0
2020	46	39	0.03	0.0
2019	50	40	0.00	0.0
2018	51	31	0.00	0.0
2017	51	28	0.11	0.3
2016	26	15	0.03	0.1
2015	40	26	0.04	0.2
2014	44	36	0.71	0.0
2013	31	11	0.20	2.3
2012	45	33	0.00	0.0
2011	44	21	0.00	0.0
2010	42	30	0.00	0.0
2009	43	30	0.01	0.0
2008	28	15	0.00	0.0
2007	43	29	0.05	0.0
2006	35	12	0.00	0.0
2005	35	29	0.00	0.0
2004	35	26	0.00	0.0
2003	43	30	0.06	0.0
2002	43	33	0.00	0.0
2001	46	30	0.02	0.0
2000	36	19	0.01	0.4
1999	45	28	0.00	0.0
1998	18	4	0.00	0.0
1997	39	23	0.00	0.0
1996	31	23	0.71	9.8
1995	31	20	0.00	0.0
1994	42	25	0.00	0.0
1993	33	17	0.00	0.0
1992	33	23	0.01	0.1
1991	38	18	0.00	0.0
1990	9	-8	0.07	1.1
1989	36	16	0.00	0.0
1988	40	20	0.03	0.0
1987	36	17	0.00	0.0
1986	26	24	0.00	0.0
1985	12	-1	0.00	0.0
1984	10	-5	0.08	1.5
1983	16	-6	0.00	0.0
1982	52	33	0.19	0.0
1981	49	37	0.12	0.0
1980	32	27	0.00	0.0
1979	50	34	0.06	0.0
1978	37	16	0.00	0.0
1977	32	21	0.00	0.0
1976	36	8	0.00	0.0
1975	23	14	0.00	0.0
1974	47	36	0.57	0.0
1973	46	32	0.15	0.0
1972	52	35	0.01	0.0
1971	41	16	0.00	0.0
1970	33	20	0.00	0.0
1969	47	38	0.15	0.0
1968	21	6	0.00	0.0
1967	25	10	0.01	0.3
1966	30	25	0.00	0.0
1965	28	13	0.00	0.0
1964	57	38	0.00	0.0
1963	41	29	0.11	1.0
1962	38	34	0.02	0.0
1961	51	35	0.06	0.0
1960	41	23	0.00	0.0
1959	40	18	0.00	0.0
1958	47	28	0.00	0.0
1957	47	38	0.00	0.0
1956	41	23	0.00	0.0
1955	53	43	0.02	0.0
1954	27	12	0.00	0.0
1953	49	34	0.04	0.0
1952	43	30	0.06	0.0
1951	31	19	0.00	0.0
1950	38	28	0.00	0.0
1949	25	-1	0.00	0.0
1948	39	15	0.04	0.0
1947	45	30	0.00	0.0
1946	45	21	0.00	0.0
1945	21	3	0.00	0.0
1944	32	29	0.26	0.0
1943	35	31	0.00	0.0
1942	35	22	0.02	0.0
1941	52	35	0.11	0.0
1940	55	41	0.00	0.0
1939	46	31	0.15	0.0
1938	38	20	0.00	0.0
1937	41	25	0.00	0.0
1936	41	22	0.00	0.0
1935	21	13	0.00	0.0
1934	45	33	0.14	n/a
1933	n/a	n/a	0.00	0.0
1932	43	30	0.01	0.0
1931	39	15	0.00	0.0
1930	38	16	0.00	0.0
1929	40	10	0.00	0.0
1928	30	-2	0.00	0.0
1927	31	12	0.00	0.0
1926	38	15	0.00	0.0
1925	37	24	0.00	0.0
1924	11	-3	0.12	2.0
1923	37	16	0.00	0.0
1922	34	10	0.00	0.0
1921	37	23	0.16	1.5
1920	35	31	0.12	0.5
1919	35	23	0.01	0.0
1918	33	25	0.15	2.0
1917	54	33	0.08	0.0
1916	36	28	0.04	0.5
1915	39	26	0.04	0.0
1914	24	-1	0.00	0.0
1913	28	4	0.00	0.0
1912	32	17	0.05	0.7
1911	28	16	0.01	0.1

What's the all-time high for Boise on 12/20?

For the date of Dec 20, the highest temperature ever reached in Boise history is 57 °F which happened in 1964.

Highest Temperatures in Boise on December 20

Rank	Temperature	Year
1	57 °F	1964
2	55 °F	1940
3	54 °F	1917
4	53 °F	1955
5	52 °F	1982
5	52 °F	1972
5	52 °F	1941
8	51 °F	1961
8	51 °F	2018
8	51 °F	2017

What's the all-time low for Boise on 12/20?

For the date of Dec 20, the lowest temperature ever reached in Boise history is -8 °F which happened in 1990.

Lowest Temperatures in Boise on December 20

Rank	Temperature	Year
1	-8 °F	1990
2	-6 °F	1983
3	-5 °F	1984
4	-3 °F	1924
5	-2 °F	1928
6	-1 °F	1949
6	-1 °F	1914
6	-1 °F	1985
9	3 °F	1945
10	4 °F	1998
10	4 °F	1913

Lowest High Temperatures in Boise on December 20

Rank	Temperature	Year
1	9 °F	1990
2	10 °F	1984
3	11 °F	1924
4	12 °F	1985
5	16 °F	1983
6	18 °F	1998
7	21 °F	1945
7	21 °F	1935
7	21 °F	1968
10	23 °F	1975

What's the most it has ever rained in Boise on 12/20?

For the date of Dec 20, the most precipitation ever recorded in Boise history is 0.71 inches which has happened 2 times, most recently in 2014.

All-Time Most Precipitation in Boise on December 20

Rank	Precipitation	Year
1	0.71 inches	1996
1	0.71 inches	2014
3	0.57 inches	1974
4	0.26 inches	1944
5	0.20 inches	2013
6	0.19 inches	1982
7	0.16 inches	1921
8	0.15 inches	1969
8	0.15 inches	1939
8	0.15 inches	1973
8	0.15 inches	1918

All-Time Most Snow in Boise on December 20

Rank	Precipitation	Year
1	9.8 inches	1996
2	2.3 inches	2013
3	2.0 inches	1924
3	2.0 inches	1918
5	1.5 inches	1984
5	1.5 inches	1921
7	1.1 inches	1990
8	1.0 inches	1963
9	0.7 inches	1912
10	0.5 inches	1920
10	0.5 inches	1916

Weather Station Details

Years	Station	Coordinates
1940–2024		location
1911–1939	Meridian 1 W	location