Winters in Stouffville are cold and snowy, with temperatures often dropping below -20°C in January and February. By March, the average temperature has risen to around 2°C, marking a slow transition into spring. As April arrives, temperatures begin to rise more noticeably, averaging 7°C, but still experiencing occasional cooler days. Summers are mild and pleasant, with July and August often seeing highs of around 32°C, while springs and autumns tend to be milder, with temperatures ranging from just below 0°C to mid-20s. In the winter months, frosts can occur frequently, while summer evenings still have a crispness to them.