The Intensity-Duration-Frequency (IDF) curves for precipitation are a probabilistic tool which has proven its usefulness in water resources management. In particular, the IDF curves for precipitation enable to answer questions on the extreme character of precipitation. The establishment of IDF curves for precipitation is made difficult or impossible in tropical areas by the lack of long-term extreme precipitation data. The authors propose a technique to overcome this shortcoming by using limited high-frequency information on rainfall extremes together with long-term daily rainfall information. Using this technique, IDF curves for precipitation are elaborated for Lubumbashi in Congo and a table with rainfall depths for different durations and return periods is given.