Compared to Germany, the net of hydrological and meteorological measuring stations in Africa is of low density. Thus, the covered area of each measuring station is very large and the meaning of the data correspondingly low. Illust. 1 shows the comparison of area per weather station in Africa and in Germany.

In Africa, one WMO weather station covers an area of 27,347 km². Altogether, there are 1,108 WMO weather stations on the continent. In Germany, the covered area per WMO weather station is 1,244 km². There are 287 WMO weather stations operated in Germany.

You can find a table with the number of WMO weather stations in some African countries here

In Africa (without the area of Sahara), there are 888 gauging stations in an area of 21,300,000 km². Because the Sahara is practically  drain-off free, the area of the continent is reduced by that area. Illust. 2 shows the area of Africa without Sahara and that of Germany with the existing number of gauging stations.

Both illustrations clearly show at how few locations on the African continent measure hydrological and meteorological data.