Boise August 31 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of August 31.
August 31 All-Time Records
1940–2022
Highest temperature 106 °F 2022
Lowest temperature 42 °F 1977
Lowest daily high 55 °F 1964
Highest daily low 69 °F 2022
Most precipitation 0.5 inches 1964
Most snow none -
August 31 Average Weather
1991–2020 1
Average high 86.1 °F
Average low 56.7 °F
Chance precipitation 8.9%
Chance snow 0%
Boise August 31 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 106 69 0.00 0.0
2021 81 54 0.00 0.0
2020 76 54 0.00 0.0
2019 96 65 0.00 0.0
2018 80 58 0.00 0.0
2017 89 65 0.00 0.0
2016 92 62 0.00 0.0
2015 83 52 0.00 0.0
2014 74 48 0.00 0.0
2013 95 59 0.00 0.0
2012 88 63 0.00 0.0
2011 80 58 0.00 0.0
2010 72 50 0.00 0.0
2009 88 62 0.00 0.0
2008 69 52 0.00 0.0
2007 94 68 0.04 0.0
2006 74 43 0.00 0.0
2005 80 50 0.00 0.0
2004 102 68 0.00 0.0
2003 89 60 0.00 0.0
2002 87 61 0.00 0.0
2001 91 64 0.00 0.0
2000 80 57 0.09 0.0
1999 66 43 0.00 0.0
1998 92 58 0.00 0.0
1997 86 63 0.00 0.0
1996 82 56 0.00 0.0
1995 96 54 0.00 0.0
1994 87 52 0.00 0.0
1993 85 47 0.00 0.0
1992 86 61 0.00 0.0
1991 96 63 0.00 0.0
1990 84 48 0.00 0.0
1989 80 44 0.00 0.0
1988 87 48 0.00 0.0
1987 94 57 0.00 0.0
1986 78 47 0.00 0.0
1985 78 48 0.00 0.0
1984 61 55 0.00 0.0
1983 93 61 0.10 0.0
1982 81 46 0.00 0.0
1981 79 43 0.00 0.0
1980 73 43 0.00 0.0
1979 77 56 0.02 0.0
1978 83 58 0.00 0.0
1977 73 42 0.00 0.0
1976 92 55 0.00 0.0
1975 73 48 0.00 0.0
1974 91 56 0.00 0.0
1973 69 53 0.02 0.0
1972 83 50 0.00 0.0
1971 75 60 0.00 0.0
1970 97 69 0.09 0.0
1969 86 49 0.00 0.0
1968 87 59 0.00 0.0
1967 99 67 0.00 0.0
1966 76 43 0.00 0.0
1965 80 43 0.00 0.0
1964 55 49 0.46 0.0
1963 73 60 0.05 0.0
1962 83 48 0.00 0.0
1961 79 62 0.01 0.0
1960 88 62 0.00 0.0
1959 77 50 0.00 0.0
1958 89 53 0.00 0.0
1957 76 47 0.00 0.0
1956 77 47 0.00 0.0
1955 94 56 0.00 0.0
1954 79 54 0.00 0.0
1953 80 53 0.00 0.0
1952 80 48 0.00 0.0
1951 75 45 0.00 0.0
1950 94 58 0.00 0.0
1949 92 59 0.00 0.0
1948 84 48 0.00 0.0
1947 84 51 0.00 0.0
1946 77 51 0.00 0.0
1945 96 54 0.00 0.0
1944 89 58 0.00 0.0
1943 79 42 0.00 0.0
1942 79 50 0.00 0.0
1941 77 50 0.00 0.0
1940 92 65 0.00 0.0
All-Time Highest Temperatures in Boise on August 31
Rank Temperature Year
1 106 °F 2022
2 102 °F 2004
3 99 °F 1967
4 97 °F 1970
5 96 °F 1991
5 96 °F 1995
5 96 °F 1945
5 96 °F 2019
9 95 °F 2013
10 94 °F 1987
10 94 °F 1950
10 94 °F 2007
10 94 °F 1955
All-Time Lowest Temperatures in Boise on August 31
Rank Temperature Year
1 42 °F 1977
1 42 °F 1943
3 43 °F 1981
3 43 °F 1966
3 43 °F 1965
3 43 °F 2006
3 43 °F 1980
3 43 °F 1999
9 44 °F 1989
10 45 °F 1951
Lowest High Temperatures in Boise on August 31
Rank Temperature Year
1 55 °F 1964
2 61 °F 1984
3 66 °F 1999
4 69 °F 1973
4 69 °F 2008
6 72 °F 2010
7 73 °F 1977
7 73 °F 1975
7 73 °F 1963
7 73 °F 1980
All-Time Most Precipitation in Boise on August 31
Rank Precipitation Year
1 0.5 inches 1964
2 0.1 inches 1983
3 0.1 inches 2000
3 0.1 inches 1970
5 0.1 inches 1963
6 0.0 inches 2007
7 0.0 inches 1979
7 0.0 inches 1973
9 0.0 inches 1961
Weather Station Details
Years Station Coordinates
1940–2022 location