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Table 2 The 14 Köppen-Geiger climate categories and their grouping into four major climate groups (rightmost column)

From: Clock-dated phylogeny for 48% of the 700 species of Crotalaria (Fabaceae–Papilionoideae) resolves sections worldwide and implies conserved flower and leaf traits throughout its pantropical range

Köppen-Geiger climate category Main climate Annual Precipitation Seasonal temperature Major climate group
Af Equatorial Pmin ≥ 60 mm Tmin ≥ +18 °C Humid tropics
Am Pann ≥ 25(100-Pmin)
As Pmin < 60 mm in summer Dry tropics
Aw Pmin < 60 mm in winter
Bsh Arid Pann > 5 Pth Tann ≥ +18 °C Arid
Bsk Tann < +18 °C
Bwh Pann ≤ 5 Pth Tann ≥ +18 °C
Bwk Tann < +18 °C
Cwa Mild temperate Pwmin < Psmin Psmax > 10 Pwmin Tmax ≥ +22 °C Mild temperate
Cwb Tmax < +22 °C and at least 4 Tmon ≥ +10 °C
Csa Psmin < Pwmin, Pwmax > 3 Psmin and Psmin < 40 mm Tmax ≥ +22 °C
Csb Tmax < +22 °C and at least 4 Tmon ≥ +10 °C
Cfa neither Cs nor Cw Tmax ≥ +22 °C
Cfb Tmax < +22 °C and at least 4 Tmon ≥ +10 °C
  1. Precipitation criteria reflect annual accumulated precipitation (Pann), monthly precipitation in driest (Pmin) and wettest (Pmax) month, for the summer and winter half-years on the hemisphere considered (Psmin, Psmax, Pwmin, Pwmax) and dryness threshold (Pth, only for Arid). Dryness threshold (mm) depends on annual temperature and annual cycle of precipitation. Temperature criteria depend on annual mean near-surface temperature (Tann), monthly mean temperature of warmest (Tmax) and coldest (Tmin) months, and monthly temperature (Tmon). (See [31])