Rainfall in the Namib occurs mainly in the form of convective summer storms from which maximum precipitation is received over the Escarpment to the east. The coastal Namib receives an annual mean rainfall of only 15 mm, whereas this increases further inland to the eastern edge of the desert, which has an annual mean figure of up to 100 mm rainfall. NamibRand probably experiences an annual mean rainfall of  between 70 - 80 mm. Most of the rain falls during summer months, but the reserve is on the edge of the winter rainfall area and occasionally receives a small amount of winter rainfall, though this is normally not more than a few millimetres.