D2 CLIMATIC Climatic data at Cape Flats Wastewater Treatment Plant Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ann. Mean temp. [deg C]*1 21.0 20.5 19.2 16.8 14.1 12.2 11.4 12.5 13.8 15.2 17.7 19.5 16.2 Precipitation [mm]*2 4 7 18 69 61 111 124 85 35 17 7 9 547 *1 1989-1990. *2 1986-1990. Water temperature [deg C] 1981-1990 Depth [m] Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dep Surface 23.1 22.5 20.4 19.0 16.1 13.7 12.5 14.4 16.0 17.9 20.3 22.1