Northern Hemisphere, the warmest month is usually July or August. High temperatures during the warmest month tend to be in the high 20s to low 30s °C (80s °F), while average January afternoon temperatures are near or well below freezing. Frost-free periods typically last 4 to 7 months in this climate regime.

Within North America, this climate includes portions of the central and eastern United States from east of 100°W to south of about the 44°N