Main groups
•A: Tropical rainy climate, all months > +18 C
•B: Dry climate, Evaporation > Precipitation
•C: Mild humid climate, coldest month +18 C - -3 C
•D: Snowy - forest climate, coldest month < -3C but warmest > +10
•E: Polar climate , warmest month < +10 C
•ET: Tundra climate, warmest month > 0 C
•Subgroups
•f : Moist, no dry seasons
•w: Dry season in winter
•s : Dry season in summer