Average Monthly Temperatures for January Boise, Idaho (airport) for the 73-year period 1940 through 2012 normal(1981-10) = 31.3 F degrees RANK RANK AMONG AMONG DATA YEAR COLDEST WARMEST 10.3 1949 w- 1 73 16.2 1979 2 72 19.0 1977 w- 3 71 19.1 1985 4 70 20.7 1942 w+ 5 69 21.1 1962 c+ 6 68 21.2 1984 7 67 21.5 1957 c- 8 66 23.2 1947 w 9 65 23.3 1963 c 10 64 23.5 1955 c 11 63 24.0 1960 c- 12 62 24.4 1991 13 61 24.7 1989 c+ 14 60 24.8 1982 c 15 tie 24.8 1993 w+ tie 58 25.0 1944 w- 17 57 25.4 1950 c+ 18 56 26.0 1964 w 19 55 26.1 1988 w- 20 54 26.6 1952 w+ 21 53 27.2 2001 22 52 27.8 1987 w+ 23 51 28.2 1943 c+ 24 tie 28.2 1975 tie 49 28.4 2004 26 48 29.0 1946 27 tie 29.0 2008 c+ tie 46 29.1 1951 c+ 29 45 29.2 2007 w- 30 44 29.4 1974 c+ 31 tie 29.4 1986 tie 42 29.5 1968 c- 33 41 30.3 1980 34 40 30.7 1973 w+ 35 39 30.9 1972 c- 36 38 31.5 1958 w+ 37 tie 31.5 2002 tie 36 31.3 2009 c- 39 35 31.7 2011 c+ 40 34 32.1 1997 41 33 32.2 1945 c- 42 tie 32.2 1976 c+ tie 31 32.4 1966 w 44 30 32.5 1996 c- 45 29 32.7 1994 46 28 32.8 2005 c- 47 27 32.9 1961 48 26 33.0 1940 w 49 tie 33.0 1948 tie 24 33.1 1992 w+ 51 23 33.2 1941 w+ 52 22 33.5 1956 c+ 53 21 33.9 1971 c+ 54 tie 33.9 1981 tie 19 34.1 1965 56 18 34.2 1990 w+ 57 tie 34.2 2000 c+ tie 16 34.3 1969 w+ 59 15 34.8 2012 c- 60 14 35.3 1999 c+ 61 13 35.8 1959 w+ 62 12 35.9 1983 w+ 63 11 36.2 1967 c+ 64 tie 36.2 1970 w tie tie 36.2 1995 w tie 8 36.4 2006 w- 67 7 36.5 1954 68 6 37.0 1978 w+ 69 5 37.4 2010 W+ 70 4 38.7 2003 w 71 3 38.9 1998 w+ 72 2 41.0 1953 w 73 1 2/6/2012 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+ average january temperatures at boise, airport.txt