Chattanooga is typically chill in December.

Maximum temperatures go down compared to the previous month from +61°F to +52°F. The minimum temperature also goes down from +43°F to +37°F.

Pack a jumper and a jacket as there will be cooler temperatures.

December is one of the coolest months in Chattanooga, here is the comparison with other months:

December typically has worse weather conditions compared to November. It’s getting colder in December. From +61°F in the day, the average maximum temperature lowers to +52°F. Prepare for more rain. Average rainfall goes from 100 mm to 120 mm. Humidity rises from 71% to 72%. The average wind speed doesn’t change much during December, staying around 1 m/s. The days becoming less sunny, going from 9 sunny days in November to 6 in December.

January brings much the same weather, it remains ok.

The climate in Chattanooga in December has not changed that much over the last 43 years.

The average temperature was the lowest in 1979 (+67°F) and the highest in 2016 (+75°F). The driest year was 2007 with only 654 mm of rainfall, and the wettest year was 2019 with 2402 mm.

For this page, we’ve looked at the typical weather in Chattanooga, based on historical hourly weather data from January 1, 1979, to December 31, 2023.

For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.