List of locations with a subtropical climate

These regions can also exist beyond 45 degrees poleward due to maritime influences on the NW European and Argentinian coasts, according to Trewartha.

Six climate classifications utilise the term to help define the various temperature and precipitation regions for the planet Earth.

The Köppen climate classification instead classifies the warmest month above 22 °C (71.6 °F) and the coldest above 0 °C (32 °F) or −3 °C (26.6 °F) depending on preference.

On the colder temperate side of the line, the total flora is adapted to survive periods of variable length of low temperatures, whether as seeds in the case of the annuals or as perennial plants which can withstand the cold.

However Wladimir Köppen has distinguished the hot or subtropical and tropical (semi-)arid climates (BWh or BSh) having an average annual temperature greater than or equal to 18 °C (64.4 °F) from the cold or temperate (semi-)arid climates (BWk or BSk) whose annual temperature average is lower.

Within the humid monsoon regions in the subtropics such as Northern Vietnam (including Hanoi), a wet season is seen annually during the summer, which is when most of the yearly rainfall falls.

Plants such as date palms, citrus, mango, litchi, and avocado are grown within the subtropical zones.

Many of the higher mountains at tropical latitudes have sparsely (if at all) inhabited areas with a subtropical climate.