Winters in Barrie are cold and snowy, with January being the coldest month, averaging around -4°C. Temperatures slowly rise in February and March, but still experience occasional cold snaps. Spring arrives in April, with temperatures warming up to a more pleasant average of 7°C, and May sees a significant jump to an average high of 12°C. Summer months bring warm temperatures, with June being the warmest, averaging around 20°C, followed by July and August which are slightly cooler at 19 and 21°C respectively. As autumn sets in, September brings a slight drop in temperature, but October is similar to May, while November cools down again, and December returns to winter-like temperatures.