The temperatures are highest on average in July, at around , and lowest in January, at around . The highest temperature ever recorded in Montmélian was  on 7 July 2015; the coldest temperature ever recorded was  on 27 November 2005.
The temperatures are typically highest in July around ; they are lowest in January, around . The highest temperature ever measured in Montmélian was on 7 July 2015 at ; the lowest temperature ever recorded was on 27 November 2005 at .