While occasional thunderstorms and other rains can occur in summer, June through August are Sydney's driest months on average. Sydney's average annual precipitation cycle reflects these realities; the year's driest month, on average, is July; its wettest month, on average, is December. Average annual precipitation in Sydney is over 1500mm, virtually the highest found anywhere in Canada outside coastal British Columbia. Snowfall is heavy, averaging nearly 300 cm per winter season. However, winter-season storms are variable, and can bring changing precipitation types, commonly from ice/snow to rain and possibly back to ice/snow. As such, actual snow accumulation is variable. A winter storm can bring accumulating snow, followed by heavy rain, then a brief return to snow or ice, resulting in no or minimal additional snow accumulation. Overall, Sydney's climate is moderately cold and strikingly variable, wet, stormy and windy from fall to early spring (October to March), and more stable and drier in summer (June to August).