A good average is between 25 and 30 mm per week during the warm summer months and reducing during cooler or rainy months of the year.
Nhlayo yale xikarhi hi leyingale ka 25 na 30 mm hi vhiki hi tinhweti ta ximumu kutani swihunguteka loko kutitimela kumbe eka tinhweti ta mpfula e lembeni.