Average Temperatures for May at Boise, Idaho for the 148-year period 1864 through 2011 normal (1981-10) = 59.1 F degrees RANK RANK AMONG AMONG DATA YEAR COLDEST WARMEST 50.1 1896 w 1 148 52.2 1953 w+ 2 147 52.5 1899 c- 3 tie 52.5 1916 tie 145 52.6 1908 c- 5 144 52.7 1959 c 6 143 53.0 1942 w- 7 142 53.5 1880 8 141 53.6 1909 w 9 tie 53.6 1955 c- tie tie 53.6 2010 w- tie 138 53.7 1977 w+ 12 137 53.9 1911 13 136 54.0 1933 c- 14 tie 54.0 1943 c+ tie 134 54.1 1950 c+ 16 133 54.3 1978 w- 17 132 54.4 1927 c+ 18 131 54.5 1960 c 19 130 54.7 1879 20 tie 54.7 1981 w- tie 128 54.8 1905 w+ 22 tie 54.8 1918 c+ tie tie 54.8 1984 tie 125 54.9 1965 w 25 tie 54.9 1982 w- tie tie 54.9 1991 w+ tie 122 55.0 1915 w 28 tie 55.0 1917 c+ tie tie 55.0 1920 tie 119 55.1 1893 31 tie 55.1 1964 c tie 117 55.3 1906 w- 33 116 55.4 1974 c+ 34 115 55.5 1996 35 tie 55.5 2011 c- tie 113 55.6 1892 37 112 55.7 1990 38 111 55.8 1930 39 tie 55.8 1999 c+ tie 109 56.0 1883 41 tie 56.0 1962 c- tie 107 56.2 1876 43 tie 56.2 1938 c tie tie 56.2 1975 c+ tie 104 56.3 1948 46 tie 56.3 1989 c+ tie 102 56.3 1998 w 48 101 56.4 1912 w+ 49 tie 56.4 1922 tie 99 56.5 1967 51 tie 56.5 1983 w+ tie tie 56.6 1935 c- 53 tie 56.6 1945 c- tie 95 56.7 1898 c+ 55 94 56.8 1868 56 tie 56.8 1923 c tie tie 56.8 1951 w tie 91 56.9 1995 w+ 59 90 57.1 1878 60 89 57.2 1895 61 tie 57.2 1921 c+ tie tie 57.2 1980 w+ tie 86 57.4 1903 c+ 64 85 57.5 1882 65 tie 57.5 1970 tie 83 57.6 1902 c+ 67 tie 57.6 1946 w tie tie 57.6 1952 tie 80 57.7 1873 70 tie 57.7 1877 tie 78 57.8 1929 72 tie 57.8 1968 c- tie tie 57.8 1979 tie 75 57.9 1961 75 tie 57.9 1988 tie 73 58.0 1907 w- 77 72 58.2 1957 w 78 71 58.4 1881 79 tie 58.4 1932 w- tie tie 58.4 1941 w+ tie 68 58.5 1985 c 82 67 58.6 1904 c+ 83 tie 58.6 1944 tie 65 58.7 1926 w+ 85 tie 58.7 2003 tie tie 58.7 2004 tie 62 58.9 1885 88 tie 58.9 1889 tie 60 59.0 1913 w 90 59 59.1 1886 91 tie 59.1 1986 tie tie 59.1 2002 tie 56 59.3 1894 94 tie 59.3 1919 w+ tie tie 59.3 1976 c tie 53 59.4 2000 c 97 tie 59.4 2005 tie 51 59.5 1956 c+ 99 50 59.7 1870 100 tie 59.7 1900 w+ tie 48 59.8 1910 c+ 102 47 59.9 1871 103 tie 59.9 1872 tie tie 59.9 1888 tie tie 59.9 1954 c- tie 43 60.0 1971 c+ 107 42 60.1 1891 108 41 60.2 1890 109 40 60.3 1887 110 39 60.4 1937 c- 111 38 60.5 1973 112 tie 60.5 2008 c tie 36 60.6 1972 w+ 114 35 60.9 1963 c 115 34 61.0 1875 116 tie 61.0 1994 w+ tie tie 61.0 2006 tie 31 61.1 1884 119 tie 61.1 1969 w tie 29 61.2 1867 121 tie 61.2 1914 w tie 27 61.3 1940 w+ 123 26 61.4 1931 c+ 124 tie 61.4 2001 tie 24 61.5 1949 126 tie 61.5 1966 w+ tie 22 61.6 2009 128 21 61.7 1901 c 129 20 61.8 1925 c+ 130 tie 61.8 1939 c tie 18 62.0 1866 132 17 62.2 1947 w- 133 tie 62.2 1987 w+ tie 15 62.5 2007 135 14 62.8 1936 c+ 136 13 62.9 1997 w 137 12 63.1 1993 w+ 138 11 63.4 1897 w+ 139 10 63.5 1874 140 9 63.8 1924 w- 141 8 64.3 1958 w- 142 tie 64.3 1992 w+ tie 6 64.6 1928 c+ 144 5 65.4 1934 145 4 65.5 1864 146 3 66.1 1869 147 2 67.2 1865 148 1 8/8/2011 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+ average may temperatures at boise, all sites.txt