Winters in Welland are cold and variable, with temperatures often dropping below -10°C in January and February. Spring arrives gradually, with March experiencing warmer days above 20°C, while April and May see a steady increase in temperature. Summer is mild to warm, with July and August averaging around 24°C, but with occasional spikes above 30°C. Autumn brings a return to cooler temperatures, with September and October seeing highs in the mid-teens to low twenties, before dropping again in November and December. Overall, Welland's climate is characterized by moderate temperature fluctuations throughout the year.