Which air mass is typically associated with summer over Canada?

The Maritime Tropical (mT) air mass is typically associated with summer over Canada due to its warm and moist characteristics. This air mass forms over warm ocean waters, particularly in the Gulf of Mexico and the Atlantic Ocean. During the summer months, these warm waters contribute to high moisture levels in the air, leading to increased humidity. As mT air moves into southern and eastern Canada, it brings warm temperatures and can result in convective weather, such as thunderstorms and precipitation, which are common during the summer season.

In contrast, the other air masses have different properties that make them less suitable for summer conditions. For example, the Continental Arctic (cA) air mass is extremely cold and dry, making it more common in winter months rather than summer. The Continental Polar (cP) air mass is also cold but signifies more stable, cool conditions that do not align with the hotter, humid environment typically experienced in summer. The Continental Tropical (cT) air mass represents hot conditions, but it usually forms over land areas with little moisture, making it less relevant than the Maritime Tropical when discussing summer weather patterns in Canada.