The humid continental climate is a climate found over large areas of land masses in the temperate regions of the mid-latitudes where there is a zone of conflict between polar and tropical air masses. The humid continental climate is marked by variable weather patterns and a large seasonal temperature variance. The seasonal temperature variance can be as great as 30-39° Celsius (55-70° Fahrenheit). The temperature difference between the warmest and coldest months increases as one moves further inland and away from the moderating influence of the ocean.

Dfb: Cool summer subtype
The cool summer subtype (Köppen: Dfb) lies north of the warm summer subtype; in North America, from about 44°N to 50°N in the east but places of adequate precipitation as far north as 54°N in the Canadian Prairie Provinces and below 40°N in the high Appalachians, separated by the 22°C isotherm for the warmest month from the Dfa climates (which passes near Minneapolis, Minnesota and Grand Rapids, Michigan).Summer temperatures in this zone are usually between 70 F and 85 F during the daytime.
It includes the following places:
In Canada, it includes these areas:
Some of the major cities in this zone:
It is also found in central Scandinavia. East central Europe (east of Germany and Hungary) is a cool summer subtype with less severe winters, similar to the winters of the warm summer subtype - the winters here are modified by the oceanic climate influence of western Europe.
The cool summer subtype is marked by mild summers, long cold winters and less precipitation than the warm summer subtype, however, short periods of extreme heat are not uncommon. In this region, summers shorten and are cooler, and winters become longer and colder toward the north parts of this zone. Northern Japan has a similar climate.
Much of Mongolia and parts of southern Siberia has a thermal regime fitting this climate, but it has steppe or desert like precipitation and so is not really considered to be a humid continental climate.
Countries with this climate:
In the Southern Hemisphere it exists only in the cold uplands of New Zealand and perhaps as isolated microclimates of the southern Andes of Chile and Argentina.
Cities with such climates outside North America include:
A dry-winter variant (Köppen: Dwb) is to be found in northeastern China, northern Korea and the Southeastern region of Russian Far East, as at Vladivostok and Chongjin, North Korea, and Harbin, China.

Central and Northern New England
Northern New York
Northern Michigan
Northern and central Wisconsin
Northern and central Minnesota
Eastern parts of The Dakotas
Highest elevations of the central Appalachians
Some high-altitude areas of the Sierra Nevada
Most of Atlantic Canada
Southern Quebec
Most of Ontario except south of Toronto and far northern regions
Southern Manitoba
Central and southeastern Saskatchewan
Central (latitudinal) Alberta
Barrie, Ontario
Buffalo, New York
Burlington, Vermont
Duluth, Minnesota
Edmonton, Alberta
Erie, Pennsylvania
Fargo, North Dakota
Green Bay, Wisconsin
Halifax, Nova Scotia
Ottawa, Ontario
Portland, Maine
Watertown, New York
Sault Sainte Marie, Ontario
Montreal, Quebec
Thunder Bay, Ontario
Traverse City, Michigan
Winnipeg, Manitoba
Truckee, California
Eastern Poland
Most of Ukraine
Belarus
Latvia, Lithuania, and Estonia
Central European Russia
Southern areas of Far Eastern (as dwb) and Siberian Federal Districts, Russia
Northern North Korea (as dwb)
Northern Japan
Central regions of Sweden and southern part of Finland
Southeast Norway
Most of Slovakia
Parts of Austria and Hungary
Northeastern Romania
Mountainous areas in the Balkans
Oslo, Norway
Stockholm, Sweden
Helsinki, Finland
Tallinn, Estonia
Warsaw, Poland
Saint Petersburg, Russia
Minsk, Belarus
Moscow, Russia
Kiev, Ukraine
Sapporo, Japan
Riga, Latvia
Vilnius, Lithuania
Dobbiaco, Italy
Wanaka, New Zealand