Average Temperatures for August at Boise, Idaho (airport) for the 72-year period 1940 through 2011 normal (1981-10) = 74.7 F degrees RANK RANK AMONG AMONG DATA YEAR COLDEST WARMEST 67.2 1980 1 72 67.7 1976 w+ 2 71 68.2 1954 c- 3 70 68.6 1993 w+ 4 69 68.7 1968 c 5 68 69.0 1960 c 6 67 69.2 1964 c+ 7 tie 69.2 1985 tie 65 69.7 1956 c+ 9 64 69.9 1978 c 10 63 70.0 1959 w- 11 tie 70.0 1975 c+ tie tie 70.0 1987 w+ tie tie 70.0 1989 c tie 59 70.4 1948 w- 15 58 70.7 1944 w- 16 tie 70.7 1957 w- tie tie 70.7 1962 c- tie 55 70.9 1941 w+ 19 tie 70.9 1943 tie tie 70.9 2002 w- tie 52 71.1 1965 w+ 22 51 71.2 1979 c 23 tie 71.2 1995 tie 49 71.5 1953 w+ 25 48 71.6 1988 c+ 26 47 71.7 1974 c+ 27 46 72.1 1966 28 45 72.2 1951 w+ 29 44 72.3 1947 c 30 43 72.4 1969 w 31 42 72.7 1950 c+ 32 tie 72.7 1982 w+ tie 40 72.9 1942 c- 34 tie 72.9 1952 c- tie 38 73.0 1973 c+ 36 37 73.2 1946 w+ 37 36 73.4 1945 c+ 38 35 73.5 1963 w 39 34 73.6 1949 w 40 tie 73.6 1977 w+ tie 32 73.9 1992 w 42 tie 73.9 2010 c+ tie 30 74.0 1990 44 tie 74.0 2006 tie 28 74.2 1940 w+ 46 tie 74.2 1981 c+ tie 26 74.5 1972 w+ 48 25 74.6 1955 c+ 49 24 74.8 1996 50 23 74.9 1983 w- 51 tie 74.9 2004 w- tie 21 75.1 1999 c- 53 tie 75.1 2009 w- tie 19 75.5 1984 55 tie 75.5 2007 tie 17 75.6 1997 w+ 57 16 75.8 1970 c- 58 15 75.9 1958 c- 59 tie 75.9 1986 tie tie 75.9 2000 c tie tie 75.9 2008 tie 11 76.1 1994 w+ 63 10 76.6 1991 w 64 9 76.7 1998 65 tie 76.7 2005 tie 7 77.3 2003 67 6 77.8 1961 68 5 78.0 1967 c- 69 4 78.4 2011 70 3 78.6 1971 c 71 2 78.7 2001 72 1 9/1/2011 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+ average august temperatures at Boise, airport.txt