This handbook is a comprehensive guide that deals with installing and using rain gauges for rainfall data collection. Based on the World Meteorological Organization’s (WMO) recommended procedures, it describes the types of rain gauges commonly used in Somalia; gives tips on how to select an appropriate location/site that is free of distorting factors; shows how to install and maintain each type of rain gauge and ensure that the resulting catch is representative of the rainfall area. The report gives detailed instructions on how to make and record readings, as well as on how to complete, archive and transmit all forms associated with the rain gauge. It is intended for use by anyone involved with rainfall observation in Somalia. To promote widespread use of this manual, excerpts of the practical sections have been translated into the Somali language.