Boise September Precipitation Totals

A time series of total precipitation in the month of September in Boise, Idaho from 1911–2023.
Rainiest September in Boise History
The rainiest September in Boise, Idaho history happened in 1986, with 2.93 inches of total precipitation.
Driest September in Boise History
There have been 7 times where no rain was recorded in Boise, Idaho for the entire month of September. The most recent time this happened was 2018.
Boise Average September Precipitation by Year
Year Precipitation (inches)
2023 0.45
2022 0.24
2021 0.37
2020 0.04
2019 0.84
2018 0.00
2017 0.56
2016 0.21
2015 0.51
2014 0.92
2013 1.75
2012 0.05
2011 0.09
2010 0.01
2009 0.01
2008 0.94
2007 0.65
2006 0.12
2005 0.32
2004 0.25
2003 0.04
2002 0.39
2001 0.44
2000 0.60
1999 0.00
1998 1.96
1997 0.67
1996 0.46
1995 0.22
1994 0.10
1993 0.00
1992 0.30
1991 0.21
1990 0.50
1989 1.20
1988 0.24
1987 0.00
1986 2.93
1985 1.81
1984 0.69
1983 0.65
1982 1.38
1981 0.36
1980 1.59
1979 0.04
1978 0.89
1977 1.20
1976 2.11
1975 0.01
1974 0.00
1973 0.82
1972 1.11
1971 0.64
1970 1.00
1969 0.68
1968 0.10
1967 0.58
1966 0.19
1965 0.55
1964 0.70
1963 0.75
1962 0.40
1961 0.79
1960 0.29
1959 2.54
1958 0.12
1957 0.06
1956 0.02
1955 0.12
1954 0.08
1953 0.02
1952 0.05
1951 0.01
1950 0.92
1949 0.19
1948 0.31
1947 0.80
1946 0.16
1945 0.44
1944 0.16
1943 0.00
1942 0.01
1941 0.22
1940 1.85
1939 1.00
1938 0.63
1937 0.17
1936 0.08
1935 0.18
1934 0.06
1933 0.20
1932 0.00
1931 0.67
1930 0.79
1929 0.30
1928 0.18
1927 0.99
1926 0.21
1925 1.34
1924 0.07
1923 0.34
1922 0.01
1921 0.48
1920 0.62
1919 1.17
1918 2.45
1917 1.51
1916 0.07
1915 0.13
1914 0.28
1913 0.46
1912 0.59
1911 0.13