 Like much of the rest of the state, Oak Ridge has a humid subtropical climate ("Cfa" in the Köppen climate classification); it is part of USDA hardiness zone 7a.The normal monthly mean temperature ranges from in January to in July, while, on average, there are 5.4 days where the temperature stays at or below freezing and 41 days with a high at or above per year.The all-time record low is , set on January 21, 1985, while the all-time record high is , set on June 30, 2012 and July 28, 1952.