In the southern hemisphere the cold temperate
climate zone
extends from 45 degrees south latitude (North Patagonia) to the Antarctic Circle at 66,5 degrees south latitude.
The angle of the plane of the
sun´s apparent path
varies between 45 and 23,5 degrees and the angle of the sun´s rays
(
Solar Altitude) between 68,5 and 0 degrees.
Day length varies between +/- 3,5 h and +/- 24 h from 12 h at the
Equinox and average temperatures are between
10 and minus 17 degrees Celsius. Note that at the Antarctic Circle on 21st of December the day length is 24 hours (polar day)
and the sun rises and sets exactly in the South.
