Continentality is defined as which of the following?

• A. The amount of annual rainfall
• B. The length of the growing season
• C. The average wind speed during summer
• D. A measure of the difference between the annual mean temperatures of the hottest and coldest months

Answer: (D)

Continentality reflects how strongly a region’s climate is shaped by inland landmasses versus maritime influence. The best way to quantify it is by the difference between the mean temperatures of the warmest and coldest months—the annual temperature range. Inland areas without nearby seas experience large swings, becoming hot in summer and cold in winter, while coastal areas with the sea’s moderating effect show smaller temperature swings. That’s why this measure directly captures how continental a climate is. The other options describe rainfall, growing-season length, or summer wind speed, which don’t directly quantify the moderating influence of distant seas.