December in Welland averages a daily high of 3.2°C with nights around -3.7°C. Expect roughly 13.7 wet days totalling 72.4mm. A hard month to visit for comfort alone.
Across the year, the best time to visit Welland is May–September.
Based on WELLAND PELHAM, ON CA (7.1km), 1995–2024. 19 years of December data.