Boise September 15 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of September 15.

September 15 All-Time Records 1911–2024
Highest temperature	95 °F	1937
Lowest temperature	29 °F	1927
Lowest daily high	54 °F	1982
Highest daily low	64 °F	2013
Most precipitation	0.42 inches	1996
Most snow	none	-

September 15 All-Time Records
1911–2024

Highest temperature

95 °F

29 °F

54 °F

Highest daily low

64 °F

2013

Most precipitation

0.42 inches

1996

Most snow

none

September 15 Average Weather 1991–2020 ¹
Average high	80.1 °F
Average low	52.2 °F
Chance precipitation	13.0%
Chance snow	0%

September 15 Average Weather
1991–2020 ¹

Average high

80.1 °F

Average low

52.2 °F

Chance precipitation

13.0%

Chance snow

Boise September 15 Weather by Year

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	89	58	0.00	0.0
2022	81	61	0.04	0.0
2021	84	52	0.00	0.0
2020	85	56	0.00	0.0
2019	92	61	0.00	0.0
2018	77	58	0.00	0.0
2017	69	50	0.00	0.0
2016	74	44	0.00	0.0
2015	63	51	0.20	0.0
2014	92	56	0.00	0.0
2013	90	64	0.00	0.0
2012	91	58	0.00	0.0
2011	88	61	0.09	0.0
2010	89	57	0.00	0.0
2009	84	58	0.00	0.0
2008	88	58	0.00	0.0
2007	83	55	0.00	0.0
2006	63	43	0.00	0.0
2005	82	49	0.00	0.0
2004	68	52	0.03	0.0
2003	79	51	0.00	0.0
2002	94	62	0.00	0.0
2001	82	59	0.00	0.0
2000	90	59	0.00	0.0
1999	85	55	0.00	0.0
1998	94	59	0.00	0.0
1997	67	50	0.11	0.0
1996	64	48	0.42	0.0
1995	94	57	0.00	0.0
1994	77	43	0.00	0.0
1993	72	49	0.00	0.0
1992	81	48	0.00	0.0
1991	74	42	0.00	0.0
1990	82	52	0.00	0.0
1989	87	48	0.00	0.0
1988	89	53	0.00	0.0
1987	69	48	0.00	0.0
1986	69	49	0.00	0.0
1985	64	43	0.00	0.0
1984	84	50	0.00	0.0
1983	83	43	0.00	0.0
1982	54	37	0.00	0.0
1981	90	52	0.00	0.0
1980	75	45	0.00	0.0
1979	88	50	0.00	0.0
1978	73	46	0.00	0.0
1977	76	53	0.00	0.0
1976	70	54	0.25	0.0
1975	89	59	0.00	0.0
1974	82	46	0.00	0.0
1973	73	45	0.00	0.0
1972	79	47	0.00	0.0
1971	72	36	0.00	0.0
1970	64	36	0.00	0.0
1969	72	38	0.00	0.0
1968	66	47	0.00	0.0
1967	79	49	0.00	0.0
1966	68	49	0.00	0.0
1965	67	47	0.08	0.0
1964	73	45	0.00	0.0
1963	72	53	0.08	0.0
1962	82	48	0.00	0.0
1961	86	50	0.00	0.0
1960	88	53	0.00	0.0
1959	60	45	0.01	0.0
1958	72	45	0.00	0.0
1957	83	51	0.00	0.0
1956	87	51	0.00	0.0
1955	65	41	0.00	0.0
1954	64	50	0.08	0.0
1953	91	63	0.00	0.0
1952	81	45	0.00	0.0
1951	89	55	0.00	0.0
1950	69	40	0.00	0.0
1949	85	52	0.00	0.0
1948	71	51	0.00	0.0
1947	82	42	0.00	0.0
1946	72	50	0.00	0.0
1945	80	48	0.05	0.0
1944	68	38	0.00	0.0
1943	86	52	0.00	0.0
1942	80	52	0.00	0.0
1941	66	49	0.00	0.0
1940	73	48	0.00	0.0
1939	78	42	0.00	0.0
1938	90	47	0.00	0.0
1937	95	47	0.00	0.0
1936	65	30	0.00	0.0
1935	79	52	0.18	0.0
1934	82	36	0.00	0.0
1933	66	46	0.00	0.0
1932	92	45	0.00	n/a
1931	88	44	0.00	n/a
1930	90	40	0.00	n/a
1929	86	49	0.00	n/a
1928	87	41	0.00	n/a
1927	69	29	0.00	0.0
1926	70	48	0.00	0.0
1925	82	45	0.00	0.0
1924	n/a	n/a	0.00	0.0
1923	79	45	0.00	0.0
1922	90	46	0.00	0.0
1921	64	38	0.00	0.0
1920	83	43	0.00	0.0
1919	86	40	0.00	0.0
1918	77	58	0.15	0.0
1917	76	38	0.00	0.0
1916	82	36	0.00	0.0
1915	69	33	0.00	0.0
1914	60	44	0.10	0.0
1913	76	38	0.00	0.0
1912	67	40	0.00	0.0
1911	77	55	0.00	0.0

What's the all-time high for Boise on 9/15?

For the date of Sep 15, the highest temperature ever reached in Boise history is 95 °F which happened in 1937.

Highest Temperatures in Boise on September 15

Rank	Temperature	Year
1	95 °F	1937
2	94 °F	2002
2	94 °F	1998
2	94 °F	1995
5	92 °F	2014
5	92 °F	2019
5	92 °F	1932
8	91 °F	2012
8	91 °F	1953
10	90 °F	1938
10	90 °F	1922
10	90 °F	2013
10	90 °F	1930
10	90 °F	1981
10	90 °F	2000

What's the all-time low for Boise on 9/15?

For the date of Sep 15, the lowest temperature ever reached in Boise history is 29 °F which happened in 1927.

Lowest Temperatures in Boise on September 15

Rank	Temperature	Year
1	29 °F	1927
2	30 °F	1936
3	33 °F	1915
4	36 °F	1916
4	36 °F	1971
4	36 °F	1970
4	36 °F	1934
8	37 °F	1982
9	38 °F	1913
9	38 °F	1969
9	38 °F	1917
9	38 °F	1921
9	38 °F	1944

Lowest High Temperatures in Boise on September 15

Rank	Temperature	Year
1	54 °F	1982
2	60 °F	1959
2	60 °F	1914
4	63 °F	2015
4	63 °F	2006
6	64 °F	1996
6	64 °F	1921
6	64 °F	1954
6	64 °F	1985
6	64 °F	1970

What's the most it has ever rained in Boise on 9/15?

For the date of Sep 15, the most precipitation ever recorded in Boise history is 0.42 inches which happened in 1996.

All-Time Most Precipitation in Boise on September 15

Rank	Precipitation	Year
1	0.42 inches	1996
2	0.25 inches	1976
3	0.20 inches	2015
4	0.18 inches	1935
5	0.15 inches	1918
6	0.11 inches	1997
7	0.10 inches	1914
8	0.09 inches	2011
9	0.08 inches	1965
9	0.08 inches	1963
9	0.08 inches	1954

Weather Station Details

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