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.
Nosetsô-bogareng e e siameng ke magareng ga 25 le 35 mm ka beke ka dikgwedi tse di bothitho tsa selemo, mme e fokotswe ka dikgwedi tsa ngwaga tse di rurufetseng kgotsa tse di dipula.