Chattanooga's winters are mild, with temperatures rarely dipping below freezing and averaging around 5-12°C in the coldest months. Spring brings gradual warming, with average highs increasing by about 7°C from March to May, eventually reaching a peak of 22-23°C in June and July. Summer days can be hot, with temperatures sometimes reaching above 30°C, but cooler nights provide some relief. Autumn is characterized by a cooling trend, with average highs dropping back down into the mid-teens by October. Winters return around December, bringing chilly temperatures that are still relatively mild compared to other parts of the country.