What defines a 'cool climate' in terms of average growing season temperature?

A 'cool climate' is typically defined by having an average growing season temperature of 16.5°C (62°F) or below. This classification is important for understanding what types of crops and plants can successfully thrive in such environments. In cooler climates, certain varieties of plants that are tolerant of lower temperatures will be more successful, impacting everything from agricultural practices to the selection of landscaping plants.

The designation of temperatures helps growers and agricultural planners make informed decisions about crop selection and management practices suitable for their specific climate conditions. The other temperature ranges in the provided choices either do not adequately specify the upper boundary of cool climates or categorize them differently, which is why they do not align with this definition.