Comparison of D-type Climates

Humid middle-latitude climates with severe winters (D climates)
Average temperature of the coldest month is below –3ºC and the warmest monthly mean exceeds 10ºC
Land-controlled climates
Absent in the Southern Hemisphere

Subgroups
Humid continental
Confined to the central and eastern portions of North America and Eurasia between 40 and 50 degrees north latitude
Severe winter and summer temperatures
High annual temperature ranges
Precipitation is generally greater in the summer than in the winter
Snow remains on the ground for extended periods

Subgroups
Subarctic
North of the humid continental climate
Often referred to as the taiga climate
Largest stretch of continuous forests on Earth
Source regions of cP air masses
Frigid winters, remarkably warm but short summers