Map showing mean rainfall amount (mm) for the monsoon season (May 1-September 30) in West Africa.  Period 1995-2006.  Based on NOAA/CPC Climatology Method Rainfall Estimates. Africa Rainfall Climatology (CPC ARC) Series
NOAA/  National Weather Service
between 2007 and 2008 <div style="display: none;">date QS:P,+2007-00-00T00:00:00Z/8,P1319,+2007-00-00T00:00:00Z/9,P1326,+2008-00-00T00:00:00Z/9</div>
NOAA, US Govt <a rel="nofollow" class="external free" href="http://www.cpc.ncep.noaa.gov/products/fews/AFR_CLIM/afr_clim_season.shtml">http://www.cpc.ncep.noaa.gov/products/fews/AFR_CLIM/afr_clim_season.shtml</a>