A hemiboreal forest has some characteristics of a boreal forest, and also shares features with temperate-zone forests to the south. Coniferous trees predominate in the hemiboreal zone, but a significant number of deciduous species, such as aspens, oaks, maples, ash trees, birches, beeches, hazels, and hornbeams, also occur.
The term sometimes denotes the form of climate characteristic of the zone of hemiboreal forests—specifically, the climates designated Dfb, Dwb and Dsb in the Köppen climate classification scheme. On occasion, it is applied to all areas that have long, cold winters and warm (but not hot) summers—including areas that are semiarid and arid based on average annual precipitation. It can also be applied to some areas with a subpolar oceanic climate (Cfc), particularly those with continental climate characteristics.
Examples of locations with hemiboreal climates or ecosystems include: