Boise September 26 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of September 26.
September 26 All-Time Records
1911–2023
Highest temperature 93 °F 1963
Lowest temperature 23 °F 1934
Lowest daily high 54 °F 1986
Highest daily low 63 °F 1914
Most precipitation 0.5 inches 1990
Most snow none -
September 26 Average Weather
1991–2020 1
Average high 75.0 °F
Average low 48.5 °F
Chance precipitation 14.8%
Chance snow 0.1%
Boise September 26 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 88 54 0.00 0.0
2021 86 58 0.00 0.0
2020 68 52 0.01 0.0
2019 80 47 0.00 0.0
2018 75 44 0.00 0.0
2017 72 51 0.00 0.0
2016 84 54 0.00 0.0
2015 85 61 0.00 0.0
2014 71 56 0.02 0.0
2013 59 41 0.18 0.0
2012 82 57 0.00 0.0
2011 81 50 0.00 0.0
2010 88 55 0.00 0.0
2009 87 57 0.00 0.0
2008 80 46 0.00 0.0
2007 73 44 0.00 0.0
2006 78 47 0.00 0.0
2005 77 45 0.00 0.0
2004 83 53 0.00 0.0
2003 88 53 0.00 0.0
2002 76 47 0.00 0.0
2001 79 49 0.00 0.0
2000 75 45 0.00 0.0
1999 59 40 0.00 0.0
1998 64 50 0.31 0.0
1997 82 56 0.00 0.0
1996 66 37 0.00 0.0
1995 72 47 0.00 0.0
1994 88 50 0.00 0.0
1993 81 37 0.00 0.0
1992 74 43 0.00 0.0
1991 88 51 0.00 0.0
1990 81 61 0.50 0.0
1989 85 48 0.00 0.0
1988 77 42 0.00 0.0
1987 65 39 0.00 0.0
1986 54 41 0.39 0.0
1985 75 44 0.00 0.0
1984 67 35 0.00 0.0
1983 81 58 0.00 0.0
1982 65 48 0.00 0.0
1981 62 42 0.00 0.0
1980 76 49 0.00 0.0
1979 73 53 0.00 0.0
1978 91 52 0.00 0.0
1977 74 46 0.00 0.0
1976 79 52 0.00 0.0
1975 76 39 0.00 0.0
1974 82 48 0.00 0.0
1973 64 38 0.00 0.0
1972 59 42 0.05 0.0
1971 56 39 0.05 0.0
1970 72 38 0.00 0.0
1969 83 47 0.00 0.0
1968 81 50 0.00 0.0
1967 81 46 0.00 0.0
1966 63 47 0.01 0.0
1965 77 45 0.00 0.0
1964 67 39 0.00 0.0
1963 93 56 0.00 0.0
1962 89 49 0.00 0.0
1961 65 35 0.00 0.0
1960 89 55 0.00 0.0
1959 64 48 0.34 0.0
1958 71 38 0.00 0.0
1957 88 54 0.00 0.0
1956 86 51 0.00 0.0
1955 68 40 0.00 0.0
1954 83 50 0.00 0.0
1953 77 42 0.00 0.0
1952 87 54 0.00 0.0
1951 66 37 0.00 0.0
1950 65 42 0.07 0.0
1949 86 58 0.00 0.0
1948 59 43 0.00 0.0
1947 76 50 0.00 0.0
1946 76 43 0.00 0.0
1945 62 40 0.00 0.0
1944 81 50 0.00 0.0
1943 87 58 0.00 0.0
1942 79 50 0.00 0.0
1941 69 45 0.00 0.0
1940 84 53 0.00 0.0
1939 80 46 0.00 0.0
1938 82 43 0.00 0.0
1937 78 35 0.00 0.0
1936 72 38 0.00 0.0
1935 76 35 0.00 0.0
1934 59 23 0.00 0.0
1933 67 36 0.00 0.0
1932 78 41 0.00 n/a
1931 83 44 0.00 n/a
1930 75 34 0.00 n/a
1929 68 27 0.00 n/a
1928 80 40 0.00 n/a
1927 80 39 0.00 0.0
1926 70 24 0.00 0.0
1925 85 49 0.00 0.0
1924 63 29 0.00 0.0
1923 55 46 0.26 0.0
1922 88 47 0.00 0.0
1921 78 36 0.00 0.0
1920 64 38 0.00 0.0
1919 79 43 0.00 0.0
1918 76 43 0.00 0.0
1917 72 41 0.00 0.0
1916 66 34 0.00 0.0
1915 71 49 0.00 0.0
1914 80 63 0.00 0.0
1913 76 30 0.00 0.0
1912 73 32 0.00 0.0
1911 73 48 0.00 0.0
All-Time Highest Temperatures in Boise on September 26
Rank Temperature Year
1 93 °F 1963
2 91 °F 1978
3 89 °F 1960
3 89 °F 1962
5 88 °F 2003
5 88 °F 2022
5 88 °F 1994
5 88 °F 1991
5 88 °F 1957
5 88 °F 1922
5 88 °F 2010
All-Time Lowest Temperatures in Boise on September 26
Rank Temperature Year
1 23 °F 1934
2 24 °F 1926
3 27 °F 1929
4 29 °F 1924
5 30 °F 1913
6 32 °F 1912
7 34 °F 1916
7 34 °F 1930
9 35 °F 1937
9 35 °F 1961
9 35 °F 1984
9 35 °F 1935
Lowest High Temperatures in Boise on September 26
Rank Temperature Year
1 54 °F 1986
2 55 °F 1923
3 56 °F 1971
4 59 °F 1934
4 59 °F 1948
4 59 °F 1972
4 59 °F 2013
4 59 °F 1999
9 62 °F 1981
9 62 °F 1945
All-Time Most Precipitation in Boise on September 26
Rank Precipitation Year
1 0.5 inches 1990
2 0.4 inches 1986
3 0.3 inches 1959
4 0.3 inches 1998
5 0.3 inches 1923
6 0.2 inches 2013
7 0.1 inches 1950
8 0.1 inches 1972
8 0.1 inches 1971
10 0.0 inches 2014
Weather Station Details
Years Station Coordinates
1940–2023 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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