Welland Weather Today (1–3 days) A dusting of new snow. Freeze-thaw conditions (max 1°C on Thu morning, min -10°C on Fri morning). Mainly strong winds. Welland Weather (4–7 days) A heavy fall of snow, heaviest during Sun afternoon. Temperatures will be below freezing (max -3°C on Sat night, min -11°C on Sun night). Mainly strong winds. 10 Day Welland Weather (7–10 days) A moderate fall of snow, heaviest on Tue night.