The South African Weather Bureau, together with the Fraunhofer Institute in Garmisch, Germany, maintains a research laboratory at Cape Point to monitor longterm changes in the chemistry of the earth's atmosphere, which may impact upon climate. The laboratory, which was architecturally designed to blend into the western slopes of Cape Point , is one of the World Meteorological Organisations' 20 Global Atmosphere Watch (GAW) stations.

It monitors environmentally important air components, including trace gases like ozone, methane and carbon dioxide, as well as solar radiation and various meteorological parameters.   The air at Cape Point is regarded as being particularly pure for most of the time, thereby providing insights into such phenomenon a stratospheric ozone depletion and climate change.

Monthly averages - Table Mountain Aerial Cableway

Month Temperature Precipitation
Average Daily Maximum Average Daily Minimum Average Monthly
January 26  °C 16  °C 15 mm
February 27  °C 16  °C 17 mm
March 25  °C 14  °C 20 mm
April 23  °C 12  °C 41 mm
May 20  °C 9  °C 69 mm
June 18  °C 8  °C 93 mm
July 18  °C 7  °C 82 mm
August 18  °C 8  °C 77 mm
September 19  °C 9  °C 40 mm
October 21  °C 11  °C 30 mm
November 24  °C 13  °C 14 mm
December 25  °C 15  °C 17 mm
Year 22  °C 11  °C 515 mm

This climatological information  are the normal values and according to World Meteorological Organization (WMO) prescripts, based on monthly averages for the 30 year period 1961 - 1990