September in Waterford averages a daily high of 18.4°C with nights around 10.7°C. Expect roughly 13 wet days totalling 76.5mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Waterford is June–September.
Based on WATERFORD TYCOR, EI (1.4km), 1995–2024. 19 years of September data.