September in Durham averages a daily high of 28.1°C with nights around 17°C. Expect roughly 9.1 wet days totalling 143.6mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Durham is April–May.
Based on RALEIGH DURHAM INTERNATIONAL AIRPORT, NC US (15.4km), 1995–2024. 30 years of September data.