Weather for London, Ontario

Surrounded by Lake Huron to the north and Lake Erie to the south, Lake Breeze fronts often move in from both lakes and approach each other. The two frontal advances push the warm, humid land air into a narrow, and often stationary, convergence zone, forcing it to rise upward. This meeting first forms bands of cumulus clouds, some of which can grow into Lake Breeze thunderstorms when conditions are ripe.

Lake Erie lies to the southwest, the direction of the prevailing wind. Wind flow throughout the year is somewhat higher due to this exposure. The vigorous interplay of warm and cold air masses during the winter and early spring months causes one or more windstorms. Precipitation is moderate and fairly evenly divides throughout the twelve months.

Lake breezes temper the extreme heat of the summer season. Due to the stabilizing effects of Lake Erie, thunderstorms are relatively infrequent. Cloudiness Increases in November, continuing mostly cloudy throughout the winter and early spring. Snow flurries off the lake begin in mid-November or early December. Great Lakes are amongst the cloudiest areas in the world in winter. With an ideal natural environment, the wine region of southwest Ontario benefits from its proximity to Lake Erie.

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