Katana VentraIP

Trewartha climate classification

The Trewartha climate classification (TCC) or the Köppen–Trewartha climate classification (KTC) is a climate classification system first published by American geographer Glenn Thomas Trewartha in 1966. It is a modified version of the Köppen–Geiger system, created to answer some of its deficiencies.[1] The Trewartha system attempts to redefine the middle latitudes to be closer to vegetation zoning and genetic climate systems.[2]

i — severely hot: Mean monthly temperature ≥35 °C (95 °F) or higher

h — very hot: 28 to 34.9 °C (82.4 to 94.8 °F)

a — hot: 22.2 to 27.9 °C (72.0 to 82.2 °F)

b — warm: 18 to 22.1 °C (64.4 to 71.8 °F)

l — mild: 10 to 17.9 °C (50.0 to 64.2 °F)

k — cool: 0.1 to 9.9 °C (32.2 to 49.8 °F)

o — cold: −9.9 to 0 °C (14.2 to 32.0 °F)

c — very cold: −24.9 to −10 °C (−12.8 to 14.0 °F)

d — severely cold: −39.9 to −25 °C (−39.8 to −13.0 °F)

e — excessively cold: −40 °C (−40 °F) or below.

climate classification by three dimensions: precipitation, humidity, and potential evapotranspiration ratio

Holdridge life zones

Koppen climate classification

Use of the Köppen–Trewartha climate classification for the People’s Republic of China