Average Winter Temperatures (Dec,Jan,Feb) Boise, Idaho for the 148-season period 1864-1865 through 2011-2012 normal (1981-10) = 32.8 degrees Rank Rank Among Among Data Season Coldest Warmest D, J, F 22.1 1948-49 1 148 22.6 1984-85 c-,c-,c- 2 147 24.8 1882-83 3 146 24.9 1983-84 c-,c-,c- 4 145 25.0 1988-89 c+,c+,c+ 5 144 25.6 1928-29 6 143 25.7 1867-68 7 142 25.8 1978-79 8 141 26.0 1864-65 9 140 26.4 1865-66 10 tie 26.4 1874-75 tie 138 26.7 1932-33 12 137 26.8 1891-92 13 tie 26.8 1963-64 w tie 135 27.0 1909-10 15 134 27.1 1954-55 c,c,c 16 133 27.4 1916-17 17 tie 27.4 1976-77 w- tie tie 27.4 1992-93 w-,w-.w- tie 130 27.5 1977-78 w-,w-.w- 20 129 27.7 1936-37 21 tie 27.7 1985-86 tie 127 28.0 1990-91 w-,w-.w- 23 126 28.1 1961-62 24 125 28.2 1951-52 w- 25 124 28.5 1921-22 26 tie 28.5 1959-60 tie 122 28.9 1931-32 28 tie 28.9 1956-57 c- tie 120 29.1 1890-91 30 tie 29.1 1941-42 tie 118 29.3 1881-82 32 117 29.7 1919-20 33 tie 29.7 1935-36 tie 115 29.9 1898-99 35 114 30.0 1981-82 36 113 30.1 1930-31 37 112 30.2 1884-85 38 tie 30.2 1887-88 tie tie 30.2 1892-93 tie 109 30.3 1912-13 41 108 30.5 1927-28 42 107 30.6 1889-90 43 tie 30.6 1943-44 tie tie 30.6 1949-50 tie 104 30.7 2000-01 46 103 30.8 1914-15 47 102 31.1 1870-71 48 tie 31.1 1897-98 tie tie 31.1 1905-06 tie tie 31.1 1986-87 w,w,w tie 98 31.2 1945-46 52 97 31.3 1883-84 53 tie 31.3 1902-03 tie tie 31.3 1972-73 w+,w,w tie 94 31.7 1894-95 56 93 31.8 1893-94 57 92 31.9 1888-89 58 tie 31.9 1965-66 w+,w,w tie 90 32.0 1929-30 60 89 32.1 1922-23 61 tie 32.1 1924-25 tie tie 32.1 1947-48 tie tie 32.1 1955-56 c+,c,c tie tie 32.1 2001-02 tie 84 32.2 1911-12 66 83 32.3 1878-79 67 tie 32.3 1987-88 w,w-,w- tie 81 32.4 1923-24 69 tie 32.4 1934-35 tie 79 32.5 1942-43 71 tie 32.5 1946-47 tie tie 32.5 1971-72 c- tie tie 32.5 2007-08 c+ tie 75 32.7 1918-19 75 tie 32.7 1975-76 c+,c,c tie 73 32.8 1910-11 77 tie 32.8 1967-68 tie tie 32.8 1974-75 c-,c-,c- tie 70 32.9 1872-73 80 tie 32.9 1938-39 tie tie 32.9 1944-45 tie tie 32.9 1989-90 tie 66 33.2 1915-16 84 tie 33.2 2008-09 ,c-,c tie 64 33.3 1904-05 86 tie 33.3 2006-07 w-,w-,w- tie 62 33.5 2003-04 88 tie 33.5 2005-06 c-,c-,c- tie 60 33.6 1896-97 90 tie 33.6 1993-94 w- tie 58 33.7 1869-70 92 tie 33.7 1995-96 c-,c-,c- tie 56 33.8 1879-80 94 55 33.9 1926-27 95 54 34.0 1962-63 96 53 34.1 2010-11 c+,c+,c+ 97 tie 34.1 1895-96 tie tie 34.1 1950-51 c,c,c tie 50 34.2 1913-14 100 49 34.3 1998-99 c+,c+ 101 48 34.4 1899-00 102 47 34.5 1866-67 103 tie 34.5 1885-86 tie tie 34.5 1901-02 tie 44 34.6 1980-81 106 43 34.7 1873-74 107 tie 34.7 1886-87 tie tie 34.7 1903-04 tie 40 34.8 1920-21 110 tie 34.8 2009-10 w,w,w tie tie 34.8 2011-12 c-,c-,c- tie 37 34.9 1880-81 113 tie 34.9 1960-61 tie 35 35.0 1970-71 c,c,c 115 tie 35.0 2004-05 w-,w-,w- tie 33 35.1 1996-97 117 32 35.2 1968-69 w-,w,w 118 31 35.3 1877-79 119 tie 35.3 1966-67 tie tie 35.3 1979-80 tie 28 35.4 1876-77 122 tie 35.4 1964-65 c,c-,c- tie 26 35.5 1953-54 124 tie 35.5 1973-74 c+,c+,c+ tie 24 35.6 1991-92 w,w+,w+ 126 23 35.7 1900-01 127 tie 35.7 1908-09 tie tie 35.7 1925-26 tie 20 35.9 1871-72 130 19 35.9 1999-00 c,c,c 131 18 36.0 1940-41 132 tie 36.0 1957-58 w,w+,w+ tie tie 36.0 1994-95 w,w,w tie 15 36.3 1982-83 w+,w+,w+ 135 14 36.4 1868-69 136 13 36.5 1958-59 w-,w-,w- 137 12 36.6 1907-08 138 11 36.8 1997-98 w+,w+,w+ 139 10 37.2 1952-53 140 9 37.3 1906-07 141 tie 37.3 1969-70 w-,w-,w- tie 7 37.4 1939-40 143 6 37.6 2002-03 w,w,w 144 5 37.8 1875-76 145 4 37.9 1917-18 146 3 38.0 1937-38 147 2 42.1 1933-34 148 1 3/1/2012 c = la nina w = el nino weak c- or w- moderate c or w strong c+ or w+ average winter temperatures at boise, all sites.txt