For the period 1931 to 1996 rainfall station data was used to
calculate (interpolation using kriging) the rainfall over
West Africa for each month. The annual rainfall was then caluclated as the sum of
the rainfall over 12 months. The number of active stations between 1931 and 1996 varies,
but is always at least 30.
To see rainfall for individual years
click here
or below the map.
