Winters are generally mild, with a January daily average temperature of . On average, the low temperature falls to the freezing mark or below on 59 days a year, and to or below on 9.2 days. Winters usually do not produce much snow; a large amount of snow is rare within the city limits. A small, measurable amount of snow can be experienced a few times each year. In 2011, Decatur received up to of snow in a single storm. It tied for the most since 1963. Summers are hot and humid with a July daily average temperature of . There are 51–52 days of + highs annually and 1.7 days of + highs. Thunderstorms are common during the summer months. The latter part of summer tends to be drier. Autumn, which spans from mid-September to early-December, tends to be similar to spring in terms of temperature and precipitation, although it begins relatively dry.