Average Temperatures for June at Boise, Idaho for the 156-year period 1878 through 2021 normal (1991-2020) = 67.6 F degrees RANK RANK AMONG AMONG DATA YEAR COLDEST WARMEST 59.4 1953 w+ 1 156 60.0 1891 2 155 60.4 1901 c 3 154 60.8 1907 w- 4 tie 60.8 1942 w- tie tie 60.8 1944 tie 151 61.0 1906 w- 7 tie 61.0 1908 c- tie 149 61.1 1945 c- 9 148 61.3 1954 c- 10 147 61.6 1905 w+ 11 tie 61.6 1943 c+ tie 145 61.7 1894 13 tie 61.7 1984 tie 143 61.8 1915 w 15 tie 61.8 1916 tie tie 61.8 1947 w- tie 140 61.9 1993 w+ 18 139 62.3 1951 w 19 138 62.5 1964 c 20 137 62.6 1895 21 tie 62.6 1917 c+ tie tie 62.6 1923 c tie tie 62.6 1976 tie tie 62.6 1980 w+ tie tie 62.6 1991 w+ tie 131 62.7 1890 27 tie 62.7 1893 tie 129 62.8 1887 29 128 62.9 1941 w+ 30 127 63.0 1914 w 31 126 63.1 1939 c 32 125 63.2 1981 w- 33 124 63.4 1998 w 34 123 63.6 1899 c- 35 tie 63.6 1928 c+ tie tie 63.6 1950 c+ tie 120 63.8 1879 38 tie 63.8 1983 w+ tie tie 63.8 1995 w+ tie 117 63.9 1963 c 41 116 64.0 1880 42 tie 64.0 1929 tie 114 64.1 1920 44 113 64.2 1888 45 tie 64.2 1952 tie tie 64.2 2011 tie 110 64.3 1885 48 109 64.4 1881 49 tie 64.4 1930 tie tie 64.4 1975 c+ tie tie 64.4 2005 tie 105 64.5 1897 w+ 53 tie 64.5 1956 c+ tie tie 64.5 1978 w- tie 102 64.6 1902 c+ 56 tie 64.6 1904 c+ tie 100 64.7 1965 w 58 99 64.9 1971 c+ 59 98 65.0 1913 w 60 tie 65.0 1966 w+ tie 96 65.2 1892 62 95 65.4 1946 w 63 94 65.5 1911 64 tie 65.5 1962 c- tie 92 65.6 1934 66 tie 65.6 1949 tie 90 65.7 1864 68 89 65.8 1982 w- 69 88 66.0 1910 c+ 70 tie 66.0 1937 c- tie tie 66.0 1957 w tie tie 66.0 1958 w- tie tie 66.0 1997 w tie tie 66.0 2020 tie 82 66.1 1882 76 tie 66.1 1935 c- tie tie 66.1 1967 tie 79 66.2 1927 c+ 79 78 66.3 1868 80 tie 66.3 1898 c+ tie tie 66.3 1969 w tie tie 66.3 1999 c+ tie tie 66.3 2010 tie 73 66.4 1909 w 85 tie 66.4 1919 w+ tie tie 66.4 1925 c+ tie 70 66.5 1948 88 69 66.6 1912 w+ 89 68 66.7 1955 c- 90 tie 66.7 1979 tie tie 66.7 1996 tie 65 66.8 1924 w- 93 64 66.9 1877 94 tie 66.9 1886 tie tie 66.9 1990 tie 61 67.0 1938 c 97 60 67.1 1884 98 tie 67.1 2008 tie 58 67.2 1932 w- 100 tie 67.2 1985 c tie 56 67.3 2001 102 tie 67.3 2012 tie tie 67.3 2014 tie 53 67.5 2019 105 52 67.6 1972 w+ 106 tie 67.6 1973 tie 50 67.8 1896 w 108 tie 67.8 2009 w- tie 48 67.9 1968 c- 110 tie 67.9 1994 w+ tie 46 68.2 1874 112 tie 68.2 1921 c+ tie tie 68.2 1931 c+ tie 43 68.3 2018 115 42 68.5 1989 c+ 116 41 68.6 1959 c tie 40 68.6 1883 118 tie 68.6 2000 c+ 119 38 68.9 1889 120 tie 68.9 1960 c tie tie 68.9 1970 tie 35 69.0 2017 123 34 69.2 1936 c+ 124 33 69.3 2004 125 32 69.6 1940 w+ 126 tie 69.6 2002 w- tie 30 69.7 1878 128 tie 69.7 1933 c- tie tie 69.7 2003 tie 27 69.8 1992 w+ 131 26 69.9 2013 132 25 70.0 1900 w+ 133 24 70.2 1873 134 tie 70.2 1926 w+ tie tie 70.2 1977 w+ tie tie 70.2 1987 w+ tie 20 70.3 1922 138 19 70.4 1875 139 18 70.6 1903 c+ 140 tie 70.6 2007 tie 16 70.7 1988 142 15 71.0 2006 143 14 71.3 1865 144 tie 71.3 1872 tie 12 71.7 1974 c+ 146 11 71.8 2016 147 10 72.0 1986 148 9 72.4 1876 149 8 72.9 1961 150 7 73.0 1870 151 6 73.2 1918 c+ 152 5 74.3 1871 153 4 75.9 2015 w 154 tie 75.9 2021 tie 2 77.1 1869 156 1 4/21/2022 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+