The study of extreme rainfall events is of paramount importance for socio-economic management and safeguarding. Road infrastructure, population, agricultural activities are among the sectors most affected by these events. To take the measures to reduce the impacts of these events, this work aims to characterize extreme rainfall in the Mono department over the period from 1960 to 2022. Daily rainfall data for the above-mentioned period interval are used. The methods used are: linear regression, generalized extreme values ​​and the return period based on the Gumel formula and the standardized rainfall index. Trends in maximum daily rainfall were also explored for rainfall amounts ≥ 10 mm and 20 mm, 95th, 99th and 99.5th percentiles. In general, a positive trend of the extremes events is observed at the district of Grand-Popo (0,207 mm/year) while in Athieme (˗0,216 mm/year) and Bopa (˗0,114 mm/year), a decrease in these extremes events is evident, but with a slight increase over the department. The return periods between 2 and 5 years have experienced rainfall amounts varying between 80 and 125 mm throughout the department. These results are useful for water resources management and consequently those of agricultural activities as well as climate change adaptation and resilience.