Average Summer Temperatures (Jun,Jul,Aug) Boise, Idaho (airport) for the 72-season period 1940 through 2011 normal(1981-10) = 72.7 F degrees RANK RANK AMONG AMONG DATA YEAR COLDEST WARMEST 65.2 1993 w+ 1 72 67.6 1980 2 71 67.8 1976 w+ 3 70 67.9 1944 w- 4 69 68.3 1953 w+ 5 tie 68.3 1954 c- tie 67 68.6 1943 7 66 68.9 1964 c+ 8 65 69.1 1948 w- 9 tie 69.1 1978 c tie 63 69.3 1983 w- 11 62 69.4 1962 c- 12 61 69.5 1981 c+ 13 tie 69.5 1982 w+ tie tie 69.5 1995 tie 58 69.7 1941 w+ 16 tie 69.7 1947 c tie tie 69.7 1965 w+ tie 55 69.8 1942 c- 19 tie 69.8 1945 c+ tie tie 69.8 1956 c+ tie 52 69.9 1950 c+ 22 tie 69.9 1963 w tie 50 70.0 1957 w- 24 49 70.1 1951 w+ 25 tie 70.1 1966 tie 47 70.2 1952 c- 27 46 70.5 1969 w 28 tie 70.5 1984 tie tie 70.5 1987 w+ tie 43 70.7 1979 c 31 42 70.9 1955 c+ 32 tie 70.9 1975 c+ tie 40 71.1 1946 w+ 34 39 71.2 1949 w 35 38 71.3 1968 c 36 37 71.4 1985 37 36 71.5 1959 w- 38 tie 71.5 1997 w+ tie 34 71.6 1991 w 40 33 71.7 1992 w 41 tie 71.7 1999 c- tie 31 71.8 1989 c 43 30 71.9 1972 w+ 44 29 72.0 1958 c- 45 tie 72.0 2010 tie 27 72.1 1973 c+ 47 26 72.2 1977 w+ 48 25 72.3 1988 c+ 49 24 72.4 1974 c+ 50 tie 72.4 1990 tie 22 72.5 1986 52 21 72.7 1971 c 53 tie 72.7 2011 tie 19 72.8 1996 55 18 72.9 1940 w+ 56 tie 72.9 1960 c tie 16 73.1 1998 58 tie 73.1 2005 tie 14 73.4 2001 60 tie 73.4 2002 w- tie 12 73.5 2000 c+ 62 11 73.5 2008 63 10 73.7 1970 c- 64 tie 73.7 1994 w+ tie 8 73.8 2009 w- 66 7 74.1 2004 w- 67 6 74.2 1967 c- 68 5 75.5 2006 69 4 75.7 1961 70 3 75.9 2003 71 2 76.4 2007 72 1 9/1/2011 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+ average summer temperatures at boise, airport.txt