What types of air masses influence Canada during the summer?

The correct response highlights the significant influence of maritime polar and maritime tropical air masses on Canada during the summer months.

Maritime polar air masses typically bring cool, moist conditions originating over the ocean, particularly affecting the coastal regions and creating variable weather patterns, including increased cloudiness and precipitation. These air masses can lead to cooler temperatures even in the summer, especially along the Pacific coast and in the eastern parts of the country, due to their maritime origins.

On the other hand, maritime tropical air masses originate from warmer ocean areas and are characterized by warm, humid conditions. In summer, these air masses can significantly affect weather patterns across southern Canada, leading to warmer temperatures, increased humidity, and potential convective activity like thunderstorms.

The interaction between these two types of air masses contributes to the diverse weather phenomena experienced across Canada during the summer, from rainy spells to hot, muggy days, illustrating the dynamic nature of the country's meteorological patterns during this season. Understanding these influences is crucial for weather forecasting and flight planning for pilots.