Average Temperature in Idaho by Year

This page is a list of the average statewide temperature in the U.S. state of Idaho for each year from 1895–2021. It is a statewide average over the entire territory of the state, based on data from the NOAA.
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What Was the Hottest Year in Idaho History?
1934 was the warmest year in Idaho history. Statewide, the average daily high temperature was 59.5 °F, and the average low was 34.4 °F.
What Was the Coldest Year in Idaho History?
1985 was the coolest year in Idaho history. Statewide, the average daily high temperature was 51.7 °F, and the average low was 27.7 °F.
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Year Rank High (°F) Low (°F)
2021 3 57.4 33.5
2020 14 56.5 32.2
2019 54 54.4 31.6
2018 11 56.2 32.8
2017 14 55.8 32.7
2016 5 56.8 33.4
2015 2 58.3 34.4
2014 5 56.8 33.4
2013 30 55.8 31.7
2012 5 57.3 32.9
2011 77 54.0 30.8
2010 42 54.7 31.9
2009 61 54.6 31.0
2008 73 54.7 30.3
2007 10 57.1 32.4
2006 19 56.3 32.1
2005 31 55.5 31.6
2004 19 55.6 32.6
2003 3 57.3 33.4
2002 54 55.0 31.0
2001 19 56.5 32.0
2000 29 55.8 32.1
1999 31 55.7 31.4
1998 14 55.5 33.2
1997 45 54.7 31.7
1996 45 54.8 31.5
1995 31 54.9 32.4
1994 14 56.4 32.2
1993 118 52.2 29.6
1992 8 57.1 32.8
1991 42 54.9 31.6
1990 37 55.5 31.4
1989 61 54.5 31.0
1988 19 56.5 31.8
1987 11 57.1 31.9
1986 25 55.7 32.5
1985 127 51.7 27.7
1984 120 51.6 29.9
1983 59 53.5 32.2
1982 115 51.9 30.2
1981 14 56.0 32.7
1980 42 54.4 32.0
1979 77 54.6 30.1
1978 77 53.7 31.0
1977 54 54.8 31.2
1976 88 54.3 29.9
1975 113 52.0 30.4
1974 54 55.0 31.0
1973 61 54.3 31.2
1972 88 53.4 30.8
1971 102 52.9 30.5
1970 73 53.8 31.2
1969 61 54.8 30.7
1968 82 53.7 31.0
1967 31 55.1 32.0
1966 37 55.8 31.2
1965 73 53.9 31.0
1964 124 52.2 29.0
1963 37 55.0 32.0
1962 77 54.3 30.5
1961 31 55.2 31.9
1960 82 54.4 30.1
1959 69 54.5 30.8
1958 11 56.4 32.6
1957 88 53.8 30.3
1956 92 54.0 29.9
1955 125 51.9 28.7
1954 45 55.5 30.9
1953 19 56.2 32.2
1952 98 54.6 29.0
1951 110 53.0 29.6
1950 82 53.6 30.8
1949 102 54.4 29.0
1948 110 53.1 29.7
1947 45 54.9 31.5
1946 61 54.4 31.2
1945 77 53.8 30.9
1944 102 53.8 29.6
1943 69 54.8 30.3
1942 106 53.7 29.6
1941 31 54.8 32.5
1940 9 56.6 33.2
1939 25 56.8 31.3
1938 40 54.7 32.1
1937 92 54.2 29.8
1936 59 55.5 30.3
1935 98 54.0 29.5
1934 1 59.5 34.4
1933 73 54.9 30.1
1932 118 52.8 28.9
1931 69 55.2 30.1
1930 106 53.6 29.5
1929 120 53.4 28.2
1928 82 54.4 30.3
1927 86 53.1 31.3
1926 19 56.2 32.1
1925 25 55.3 32.9
1924 98 54.2 29.4
1923 95 53.4 30.3
1922 120 52.8 28.7
1921 45 54.9 31.5
1920 98 52.7 30.8
1919 95 54.1 29.6
1918 52 54.7 31.5
1917 108 53.3 29.7
1916 126 52.0 28.3
1915 52 54.8 31.4
1914 61 54.8 30.8
1913 115 52.3 29.8
1912 115 51.8 30.2
1911 120 52.4 29.1
1910 40 55.6 31.1
1909 88 53.3 31.0
1908 92 53.4 30.7
1907 68 54.0 31.4
1906 54 54.4 31.5
1905 86 54.2 30.1
1904 45 55.3 31.2
1903 114 52.9 29.3
1902 95 53.8 30.1
1901 45 54.9 31.5
1900 28 56.0 32.0
1899 108 53.0 30.1
1898 102 54.3 29.1
1897 69 54.2 30.9
1896 61 54.0 31.6
1895 110 53.8 29.0