September in Fayetteville averages a daily high of 28.3°C with nights around 15.8°C. Expect roughly 6.2 wet days totalling 106.1mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Fayetteville is April–May.
Based on FAYETTEVILLE EXPERIMENTAL STATION, AR US (4.5km), 1995–2024. 15 years of September data.