Africa is a huge continent, the rainfall varies enormously. You need to specify where in Africa you are referring to.
Its almost 50000mm in a year
The Sahara is the largest desert in Africa and the second largest in the world.
For 25 years
Arizona gets an average of 12.7 inches of rain each year.
In Africa they get 7 litres a year .
Approximately 1200mm per year.
Wisconsin gets 34.49 inches of year on average.
Africa is a big continent, and the rainfall varies hugely from place to place. Some desert areas don't see rain from one year to the next, parts of the rainforest get well over 100 inches each year.
Not a lot because its in the middle of the Shara Dessert
According to my research the amount of rainfall the rain forest gets each year is about 600cm.
The average rainfall in the area of Dubai is 5.9 inches per year.