September in Suffolk averages a daily high of 27.1°C with nights around 17.6°C. Expect roughly 9.9 wet days totalling 154.4mm. Comfortable conditions for being outdoors all day.
Across the year, the best time to visit Suffolk is April–May.
Based on SUFFOLK LAKE KILBY, VA US (1.5km), 1995–2024. 30 years of September data.