Method
Mean Annual Temperature
Mean annual temperature (MAT, in °C) represents the very broadest of indices of the environmental status of a location. Although it integrates and smooths the effects of diurnal, monthly and seasonal patterns of maximum and minimum temperatures, it is nevertheless used as a general first guide to determine the suitability of a location for specific crops.
MAT was calculated from daily temperatures. More detail is provided in the section Background: Climate Change Modelling.
The modelling for the intermediate future (2050s) was conducted using five different CMIP3 GCMs (Schulze, 2011).
Maps
Map Information
Stellenbosch-Berg has a historical MAT of 16-17°C (Franschhoek, Stellenbosch), 17-18°C (Paarl, Riebeeck Kasteel) and higher than 18°C (Wellington). Climate model projections for the intermediate future (mid-century) show a gradient of increases from around 2.1°C (Franschhoek, Stellenbosch) to 2.3°C (Riebeeck Kasteel).