Humid Subtropical Climate (Cfa)

Latitude/Longitude = 35o N; 90o W
Average Annual Temperature (oC) = 17
Annual Temperature Range (oC) = 22
Total Annual Precipitation (mm) = 1222
Summer Precipitation (mm) = 536
Winter Precipitation (mm) = 686

Map Location

The Sinks. Great Smoky Mountains, TN.

The ample precipitation and generally mild temperatures of the humid subtropical climate support a lush environment of temperate deciduous to temperate evergreen forests. 

(Source:  USGS Digital Data Series DDS-21. Used with permission)

Geographic Distribution 

    Southeastern U.S.

    southeastern South America;

    coastal southeast South Africa;

    eastern Australia;

    eastern Asia from northern India through south China to Japan.

Controlling Factors

    East coast location between 20o and 40o N and S latitudes.

    Humid (mTu air masses) onshore air movement in summer. 

    Cyclonic storms in winter (cP air masses)

 Characteristics

    High humidity; summers like humid tropics.

    Frost with polar air masses in winter. 

    25 to 100 in of precipitation, decreasing inland.

    Monsoon influence in Asia.

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© Michael Ritter
Last revised October 19, 2001