Boise September 23 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of September 23.
September 23 All-Time Records
1911–2024
Highest temperature 95 °F 1938
Lowest temperature 28 °F 1926
Lowest daily high 52 °F 1984
Highest daily low 63 °F 2014
Most precipitation 1.15 inches 1918
Most snow none -
September 23 Average Weather
1991–2020 1
Average high 76.4 °F
Average low 49.6 °F
Chance precipitation 14.1%
Chance snow 0%
Boise September 23 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 78 49 0.00 0.0
2022 77 49 0.00 0.0
2021 77 51 0.00 0.0
2020 85 60 0.00 0.0
2019 73 51 0.00 0.0
2018 70 48 0.00 0.0
2017 61 36 0.00 0.0
2016 70 50 0.00 0.0
2015 84 56 0.00 0.0
2014 86 63 0.00 0.0
2013 73 50 0.00 0.0
2012 67 52 0.04 0.0
2011 92 57 0.00 0.0
2010 76 45 0.00 0.0
2009 88 56 0.00 0.0
2008 71 40 0.00 0.0
2007 61 48 0.35 0.0
2006 67 38 0.00 0.0
2005 68 47 0.00 0.0
2004 76 52 0.00 0.0
2003 83 49 0.00 0.0
2002 79 51 0.00 0.0
2001 89 56 0.00 0.0
2000 60 34 0.00 0.0
1999 87 56 0.00 0.0
1998 75 51 0.00 0.0
1997 81 56 0.00 0.0
1996 66 34 0.00 0.0
1995 75 40 0.00 0.0
1994 84 50 0.00 0.0
1993 72 33 0.00 0.0
1992 87 61 0.00 0.0
1991 76 38 0.00 0.0
1990 87 54 0.00 0.0
1989 87 50 0.00 0.0
1988 77 46 0.00 0.0
1987 94 54 0.00 0.0
1986 75 40 0.00 0.0
1985 67 35 0.00 0.0
1984 52 29 0.00 0.0
1983 77 49 0.00 0.0
1982 86 48 0.00 0.0
1981 64 36 0.00 0.0
1980 71 42 0.00 0.0
1979 83 50 0.00 0.0
1978 80 45 0.00 0.0
1977 68 39 0.00 0.0
1976 78 53 0.00 0.0
1975 88 51 0.00 0.0
1974 83 48 0.00 0.0
1973 67 50 0.00 0.0
1972 58 38 0.00 0.0
1971 84 50 0.00 0.0
1970 63 39 0.00 0.0
1969 71 56 0.00 0.0
1968 71 43 0.00 0.0
1967 80 47 0.00 0.0
1966 87 59 0.00 0.0
1965 68 46 0.00 0.0
1964 76 44 0.00 0.0
1963 78 52 0.00 0.0
1962 85 50 0.00 0.0
1961 60 36 0.01 0.0
1960 73 51 0.00 0.0
1959 66 39 0.00 0.0
1958 54 36 0.08 0.0
1957 82 48 0.00 0.0
1956 77 41 0.00 0.0
1955 67 44 0.00 0.0
1954 74 45 0.00 0.0
1953 74 43 0.00 0.0
1952 85 54 0.00 0.0
1951 74 41 0.00 0.0
1950 79 50 0.00 0.0
1949 89 55 0.00 0.0
1948 58 40 0.00 0.0
1947 85 56 0.00 0.0
1946 71 39 0.00 0.0
1945 59 37 0.00 0.0
1944 77 48 0.00 0.0
1943 86 50 0.00 0.0
1942 79 43 0.00 0.0
1941 69 45 0.00 0.0
1940 74 47 0.00 0.0
1939 90 53 0.00 0.0
1938 95 56 0.00 0.0
1937 64 35 0.00 0.0
1936 n/a n/a 0.00 0.0
1935 87 51 0.00 0.0
1934 59 35 0.03 0.0
1933 68 37 0.00 0.0
1932 86 41 0.00 n/a
1931 69 39 0.30 n/a
1930 64 31 0.00 n/a
1929 65 36 0.10 n/a
1928 90 42 0.00 n/a
1927 77 47 0.00 0.0
1926 60 28 0.00 0.0
1925 84 39 0.00 0.0
1924 80 42 0.00 0.0
1923 71 34 0.00 0.0
1922 83 38 0.00 0.0
1921 69 44 0.00 0.0
1920 55 43 0.31 0.0
1919 78 38 0.00 0.0
1918 58 50 1.15 0.0
1917 53 47 1.00 0.0
1916 66 37 0.00 0.0
1915 76 49 0.00 0.0
1914 84 38 0.00 0.0
1913 67 39 0.00 0.0
1912 68 36 0.00 0.0
1911 73 30 0.00 0.0
What's the all-time high for Boise on 9/23?
For the date of Sep 23, the highest temperature ever reached in Boise history is 95 °F which happened in 1938.
Highest Temperatures in Boise on September 23
Rank Temperature Year
1 95 °F 1938
2 94 °F 1987
3 92 °F 2011
4 90 °F 1928
4 90 °F 1939
6 89 °F 1949
6 89 °F 2001
8 88 °F 2009
8 88 °F 1975
10 87 °F 1966
10 87 °F 1990
10 87 °F 1999
10 87 °F 1992
10 87 °F 1935
10 87 °F 1989
What's the all-time low for Boise on 9/23?
For the date of Sep 23, the lowest temperature ever reached in Boise history is 28 °F which happened in 1926.
Lowest Temperatures in Boise on September 23
Rank Temperature Year
1 28 °F 1926
2 29 °F 1984
3 30 °F 1911
4 31 °F 1930
5 33 °F 1993
6 34 °F 1923
6 34 °F 2000
6 34 °F 1996
9 35 °F 1934
9 35 °F 1937
9 35 °F 1985
Lowest High Temperatures in Boise on September 23
Rank Temperature Year
1 52 °F 1984
2 53 °F 1917
3 54 °F 1958
4 55 °F 1920
5 58 °F 1918
5 58 °F 1972
5 58 °F 1948
8 59 °F 1945
8 59 °F 1934
10 60 °F 1961
10 60 °F 1926
10 60 °F 2000
What's the most it has ever rained in Boise on 9/23?
For the date of Sep 23, the most precipitation ever recorded in Boise history is 1.15 inches which happened in 1918.
All-Time Most Precipitation in Boise on September 23
Rank Precipitation Year
1 1.15 inches 1918
2 1.00 inches 1917
3 0.35 inches 2007
4 0.31 inches 1920
5 0.30 inches 1931
6 0.10 inches 1929
7 0.08 inches 1958
8 0.04 inches 2012
9 0.03 inches 1934
10 0.01 inches 1961
Weather Station Details
Years Station Coordinates
1940–2024 location
1911–1939 Meridian 1 W location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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