August in Decatur averages a daily high of 31.3°C with nights around 21.3°C. Expect roughly 8.5 wet days totalling 101.4mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Decatur is April–May.
Based on DECATUR 4 SE, AL US (5.6km), 1995–2024. 21 years of August data.