Southern Ontario - Climate

Climate

Southern Ontario has a humid continental climate (Köppen Dfa to Dfb) with four distinct seasons. The average highs in July for the region range between 25°C (77 °F) to 28 °C (82 °F). The average high in January ranges from -6 °C (21 °F) to 0 °C (32 °F). The highest recorded temperature in Southern Ontario was 45 °C (113 °F) and 52 °C (125 °F) with the humidex. During cold snaps, winter temperatures on occasion drop below -30 °C (-22 °F) in central and eastern parts of Southern Ontario, while in the southwest and Niagara region temperatures infrequently dip below -20 °C (-4 °F).

Harsh weather is not uncommon in the region, in the early summer months Southern Ontario is sometimes victim to tornadoes but far more often, straight line wind damage, hail and localized flooding from severe thunderstorms. Although the majority of tornadoes rarely cause excessive damage, the region is on the periphery of Tornado Alley and (F4) tornadoes touchdown every few decades causing widespread damage. Southern Ontario also gets hurricane remnants, floods, ice storms, heavy fog, hail, and blizzards.

Small earthquakes occur in the region. The largest recorded in the region was 5.6 on the Richter scale around the Cornwall area.

Many tourists visit the area in the autumn months to look at the bright vibrant colours of fall foliage.

Southern Ontario has a very different climate from the rest of the country. It is the only area of Canada that has Carolinian forest. Many trees, plants, and wildlife in Southern Ontario are not found anywhere else in Canada. Some rare trees to Canada in this region include the tulip tree, pawpaw fruit tree and the Cucumber tree. The Carolinian forests of Southern Ontario have in large part been destroyed by development sprawl. Very few original growth areas remain.

The region has the most fresh water beaches in the nation. With relatively warm waters by mid-summer due to the hot and humid summer months and significant costalines with white sand, the major beaches in the region are visited by millions of tourists every summer. The most popular beaches are Wasaga Beach, Grand Bend, Sauble Beach, and Sandbanks.

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