Boise July 18 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of July 18.
July 18 All-Time Records
1911–2023
Highest temperature 106 °F 2009
Lowest temperature 40 °F 1916
Lowest daily high 68 °F 1987
Highest daily low 71 °F 1941
Most precipitation 0.24 inches 1976
Most snow none -
July 18 Average Weather
1991–2020 1
Average high 93.2 °F
Average low 61.9 °F
Chance precipitation 7.4%
Chance snow 0%
Boise July 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 94 60 0.00 0.0
2022 90 67 0.00 0.0
2021 101 67 0.00 0.0
2020 90 59 0.00 0.0
2019 87 62 0.00 0.0
2018 99 68 0.00 0.0
2017 96 60 0.00 0.0
2016 96 62 0.00 0.0
2015 86 56 0.00 0.0
2014 94 64 0.00 0.0
2013 100 63 0.00 0.0
2012 97 64 0.00 0.0
2011 97 60 0.00 0.0
2010 96 64 0.00 0.0
2009 106 68 0.00 0.0
2008 90 61 0.00 0.0
2007 97 68 0.00 0.0
2006 95 61 0.00 0.0
2005 98 61 0.00 0.0
2004 85 70 0.00 0.0
2003 103 68 0.00 0.0
2002 88 70 0.00 0.0
2001 81 53 0.00 0.0
2000 89 66 0.03 0.0
1999 84 51 0.00 0.0
1998 99 68 0.00 0.0
1997 72 58 0.00 0.0
1996 80 51 0.00 0.0
1995 93 62 0.00 0.0
1994 95 60 0.00 0.0
1993 82 42 0.00 0.0
1992 95 65 0.00 0.0
1991 88 53 0.00 0.0
1990 94 66 0.00 0.0
1989 99 61 0.00 0.0
1988 90 48 0.00 0.0
1987 68 50 0.00 0.0
1986 90 54 0.00 0.0
1985 93 53 0.00 0.0
1984 89 68 0.00 0.0
1983 91 49 0.00 0.0
1982 91 56 0.00 0.0
1981 92 63 0.00 0.0
1980 87 52 0.00 0.0
1979 101 65 0.00 0.0
1978 87 54 0.00 0.0
1977 94 56 0.00 0.0
1976 75 58 0.24 0.0
1975 89 57 0.00 0.0
1974 101 65 0.00 0.0
1973 95 63 0.00 0.0
1972 95 57 0.00 0.0
1971 86 70 0.00 0.0
1970 98 60 0.00 0.0
1969 93 51 0.00 0.0
1968 93 54 0.00 0.0
1967 92 59 0.00 0.0
1966 95 60 0.00 0.0
1965 90 67 0.00 0.0
1964 94 62 0.00 0.0
1963 84 51 0.00 0.0
1962 78 50 0.00 0.0
1961 93 55 0.00 0.0
1960 103 66 0.00 0.0
1959 98 64 0.00 0.0
1958 87 55 0.00 0.0
1957 85 48 0.00 0.0
1956 93 58 0.00 0.0
1955 94 63 0.00 0.0
1954 92 61 0.00 0.0
1953 92 57 0.00 0.0
1952 92 56 0.05 0.0
1951 99 65 0.00 0.0
1950 90 55 0.00 0.0
1949 95 62 0.00 0.0
1948 92 62 0.00 0.0
1947 94 70 0.00 0.0
1946 88 52 0.00 0.0
1945 88 49 0.00 0.0
1944 95 62 0.00 0.0
1943 91 56 0.00 0.0
1942 81 45 0.00 0.0
1941 92 71 0.00 0.0
1940 90 52 0.00 0.0
1939 92 51 0.00 0.0
1938 98 57 0.00 0.0
1937 96 57 0.00 0.0
1936 n/a n/a 0.00 n/a
1935 98 52 0.00 n/a
1934 98 n/a 0.00 n/a
1933 94 50 0.00 0.0
1932 85 n/a 0.00 n/a
1931 104 55 n/a n/a
1930 96 50 0.00 n/a
1929 91 62 0.00 0.0
1928 87 48 0.00 n/a
1927 97 50 0.00 n/a
1926 102 64 0.00 0.0
1925 95 63 0.00 0.0
1924 85 57 0.00 0.0
1923 92 50 0.00 0.0
1922 100 61 0.00 0.0
1921 100 50 0.00 0.0
1920 98 67 0.00 0.0
1919 82 42 0.00 0.0
1918 100 66 0.00 0.0
1917 100 67 0.00 0.0
1916 74 40 0.00 0.0
1915 80 40 0.00 0.0
1914 97 49 0.00 0.0
1913 92 49 0.00 0.0
1912 89 71 0.00 0.0
1911 96 60 0.00 0.0
What's the all-time high for Boise on 7/18?
For the date of Jul 18, the highest temperature ever reached in Boise history is 106 °F which happened in 2009.
Highest Temperatures in Boise on July 18
Rank Temperature Year
1 106 °F 2009
2 104 °F 1931
3 103 °F 1960
3 103 °F 2003
5 102 °F 1926
6 101 °F 1979
6 101 °F 2021
6 101 °F 1974
9 100 °F 2013
9 100 °F 1922
9 100 °F 1921
9 100 °F 1918
9 100 °F 1917
What's the all-time low for Boise on 7/18?
For the date of Jul 18, the lowest temperature ever reached in Boise history is 40 °F which has happened 2 times, most recently in 1916.
Lowest Temperatures in Boise on July 18
Rank Temperature Year
1 40 °F 1916
1 40 °F 1915
3 42 °F 1919
3 42 °F 1993
5 45 °F 1942
6 48 °F 1988
6 48 °F 1957
6 48 °F 1928
9 49 °F 1945
9 49 °F 1983
9 49 °F 1914
9 49 °F 1913
Lowest High Temperatures in Boise on July 18
Rank Temperature Year
1 68 °F 1987
2 72 °F 1997
3 74 °F 1916
4 75 °F 1976
5 78 °F 1962
6 80 °F 1915
6 80 °F 1996
8 81 °F 2001
8 81 °F 1942
10 82 °F 1919
10 82 °F 1993
What's the most it has ever rained in Boise on 7/18?
For the date of Jul 18, the most precipitation ever recorded in Boise history is 0.24 inches which happened in 1976.
All-Time Most Precipitation in Boise on July 18
Rank Precipitation Year
1 0.24 inches 1976
2 0.05 inches 1952
3 0.03 inches 2000
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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