Chattanooga averages 9.8 days a year above 90°F, with February the wettest month at 5.99 in of normal rain. The hottest day on record was 100°F on Jun 26, 2010; the coldest, −6°F on Dec 23, 2022. The single biggest 24-hour rain event recorded was 8.4 in on Sep 17, 2004.
Climate and Average Weather Year Round in Chattanooga
Year-round temperature
In Chattanooga, the warmest months are June through September, with average daily highs between 78°F and 84°F. The coldest stretch runs December through February, with highs between 46°F and 49°F and overnight lows reaching 29°F.
Rainfall through the year
Rainfall in Chattanooga averages 4.9 in per month over the long run. February is the wettest at 6.0 in, while October is the driest at 3.8 in.
Days at 90 °F or hotter
Chattanooga averages 9.8 days per year at 90 °F or hotter. The hottest year on record saw 39 such days (2016); the coolest just 1 (1999).
Precipitation this year
As of May 28, Chattanooga has received 20.7 in of precipitation this year — 22% below the long-term normal for this point in the year (26.5 in).