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CLIMATE CLASSIFICATIONS
TROPICAL RAINFOREST
coldest month greater than 18°C rainfall every month greater than 60
mm
SAVANNA
coldest month greater than 18°C summer rainy season, winter dry
season, one month less than 60 mm rainfall
MONSOON
coldest month greater than 18°C monsoon: very heavy rain in summer,
almost none in winter
HOT DESERT
evaporation is greater than precipitation, precipitation is less than 500mm/year
dry, rain less than 250mm/year hot, average annual temperature over
18°C
COLD DESERT
evaporation is greater than precipitation, precipitation is less than 500mm/year
dry, rain less than 250mm/year cold, average annual temperature
under 18°C
HOT STEPPE
evaporation is greater than precipitation, precipitation is less than 500mm/year
semi-arid, rain 250mm to 500mm hot, average annual temperature over
18°C
COLD STEPPE
evaporation is greater than precipitation, precipitation is less than 500mm/year
semi-arid, rain 250mm to 500mm cold, average annual temperature
under 18°C
SUBTROPICAL
warmest month greater than 10°C, coldest month -3°C to 18°C
rainfall every month greater than 30 mm
warmest month over 22°C
MARINE WEST COAST (A OR B)
warmest month greater than 10°C, coldest month -3°C to 18°C
rainfall every month greater than 30 mm
A) warmest month below 22°C OR
B) fewer than 4 months over 10°C
MEDITERRANEAN (A OR B)
warmest month greater than 10°C, coldest month -3°C to 18°C
summer drought, winter heavy rain A) warmest month over 22°C
OR B) warmest month below 22°C
CONTINENTAL (A OR B)
warmest month greater than 10°C, coldest month below 18°C
rainfall every month greater than 30 mm
A) warmest month over 22°C OR
B) warmest month below 22°C
SUBARCTIC (A OR B)
warmest month greater than 10°C, coldest month below 18°C
rainfall every month greater than 30 mm
A) fewer than 4 months over 10°C OR
B) coldest month below -38°C
POLAR (A OR B)
warmest month below 10°C A) tundra, average temperature 0°C to
10°C B) Icecap, average temperature below
0°C, ice covered