The lowest temperatures in the Southern Hemisphere are during the months that are hottest in the northern hemisphere.
May, June, July, August, and September.
According to these graphs, the minimum temperatures on Antarctica tend to hit in August.
http://www.coolantarctica.com/Antarctica%20fact%20file/antarctica%20environment/climate_graph/vostok_south_pole_mcmurdo.htm
That will depend on where you live. If you are in the Northern Hemisphere it appears lowest in December. The further north you are, the lower it looks. If you are in the Southern Hemisphere it appears lowest in June. The further south you are, the lower it looks.
The lowest temperature ever recorded in Canada was -81º F (-63º C) in Snag, Yukon, while the highest was 115º F (46º C) at Gleichen in southern Alberta.
Argentina is the South American country that contains the highest and lowest points in the western hemisphere.
The lowest temperature was -37 on Jan 19, 1994, recorded at Shelbyville,Ky The highest temperature was + 114 degrees July 28, 1930 at Greensburg, Ky
Yellowknife has very cold winters and mild to warm summers. The lowest temperature in Yellowknife ever recorded was -60* F on January 31,1947.
Black dwarfs have the lowest surface temperature.
the color of stars with the lowest surface temperature is red
the color of stars with the lowest surface temperature is red
December in the Northern Hemisphere and June in the Southern Hemisphere.
The lowest surface temperature is Jupiter. 
Surface temperature? Saturn probably doesn't HAVE a "surface".
Death Valley
Red stars have the lowest surface temperatures.
Technically speaking, Neptune is the planet with the lowest surface temperature; however, Neptune does not have a solid surface.
The lowest point in the Western Hemisphere is Laguna del Carbon, Argentina, (105 meters/340 ft below sea level); this is also the lowest point in the Southern Hemisphere and the seventh lowest point on Earth.
The lowest point in the Western Hemisphere is Laguna del Carbon, Argentina, (105 meters/340 ft below sea level); this is also the lowest point in the Southern Hemisphere and the seventh lowest point on Earth.Badwater Basin in Death Valley, California is the lowest point in the Northern Hemisphere and the second lowest point in the Western Hemisphere (eighth lowest on Earth), at 86 meters/282 feet below sea level.
Red