ORANGE RIVER: Climate

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Map of the ORANGE River

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TEMPERATURE
Upper Orange area (upstream of  Douglas in the Northern Cape): Climate over the area is cool to temperate and ranges from semi-arid to arid. (Ref.1)
    RAINFALL                                    
Upper Orange area (upstream of  Douglas in the Northern Cape): Rainfall mainly occurs as summer thundershowers, and reduces dramatically from as high as 1 000 mm per year in South Africa at locations in the east to about 200 mm per year in the west. In Lesotho, which is the source of most of the water in the Upper Orange area, rainfall varies between 600 mm per year to about 1 500 mm per year. (Ref.1)
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  References                                      

Ref.1. Department of Water Affairs and Forestry, South Africa. 2004. Internal Strategic Perspective: Upper Orange Water Management Area. Prepared by PDNA, WRP Consulting Engineers (Pty) Ltd, WMB and Kwezi-V3 on behalf of the Directorate: National Water Resource Planning. DWAF Report No P WMA.
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