Average Monthly Temperatures for January Boise, Idaho (airport) for the 82-year period 1940 through 2021 normal(1991-2020) = 32.0 F degrees RANK RANK AMONG AMONG DATA YEAR COLDEST WARMEST 10.3 1949 w- 1 82 16.2 1979 2 81 19.0 1977 w- 3 80 19.1 1985 4 79 19.6 2013 5 78 20.7 1942 w+ 6 77 21.1 1962 c+ 7 76 21.2 1984 8 75 21.3 2017 c- 9 74 21.5 1957 c- 10 73 23.2 1947 w 11 72 23.3 1963 c 12 71 23.5 1955 c 13 70 24.0 1960 c- 14 69 24.4 1991 15 68 24.7 1989 c+ 16 67 24.8 1982 c 17 tie 24.8 1993 w+ tie 65 25.0 1944 w- 19 64 25.4 1950 c+ 20 63 26.0 1964 w 21 62 26.1 1988 w- 22 61 26.6 1952 w+ 23 60 27.2 2001 24 59 27.8 1987 w+ 25 58 28.2 1943 c+ 26 tie 28.2 1975 tie 56 28.4 2004 28 55 29.0 1946 29 tie 29.0 2008 c+ tie 53 29.1 1951 c+ 31 52 29.2 2007 w- 32 51 29.4 1974 c+ 33 tie 29.4 1986 tie 49 29.5 1968 c- 35 48 30.3 1980 36 47 30.5 2014 37 46 30.7 1973 w+ 38 45 30.9 1972 c- 39 44 31.5 1958 w+ 40 tie 31.5 2002 tie 42 31.3 2009 c- 42 41 31.7 2011 c+ 43 tie 31.7 2015 w- tie 39 32.1 1997 45 38 32.2 1945 c- 46 tie 32.2 1976 c+ tie 36 32.4 1966 w+ 48 35 32.5 1996 c- 49 34 32.7 1994 50 33 32.8 2005 c- 51 32 32.9 1961 52 31 33.0 1940 w 53 tie 33.0 1948 tie 29 33.1 1992 w+ 55 28 33.2 1941 w+ 56 27 33.5 1956 c+ 57 26 33.6 2016 w+ 58 25 33.9 1971 c+ 59 tie 33.9 1981 tie 23 34.1 1965 61 22 34.2 1990 w+ 62 tie 34.2 2000 c+ tie 20 34.3 1969 w+ 64 19 34.8 2012 c- 65 18 35.3 1999 c+ 66 tie 35.3 2019 tie 16 35.8 1959 w+ 68 15 35.9 1983 w+ 69 14 36.2 1967 c+ 70 tie 36.2 1970 w tie tie 36.2 1995 w tie 11 36.4 2006 w- 73 tie 36.4 2021 c tie 9 36.5 1954 75 8 37.0 1978 w+ 76 7 37.4 2010 W+ 77 6 37.5 2020 78 5 37.8 2018 c- 79 4 38.7 2003 w 80 3 38.9 1998 w+ 81 2 41.0 1953 w 82 1 4/21/2022 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+ very strong c++ or w++ no nino (blank) average january temperatures at boise, airport.txt