Family farms in Moundou are facing the effects of climate variability. Due to increased rainfall variability and rising temperatures marked by an evolving trend, farm household incomes are increasingly affected. The objective of this study is to assess the effects of climate variability on the incomes of farm managers in order to contribute to a better understanding of the effects of climate variability on family farming. The study uses the Ricardian model to analyze the effects of rainfall and temperature variations and socioeconomic determinants on the incomes of farm managers. Data were collected from 105 farm managers distributed according to their wealth level. The results showed that an increase of 1 mm in average rainfall will lead to an increase of 1.2% FCFA/hectare of agricultural income, i.e., a gain of 1633 FCFA/hectare. On the other hand, a 1% increase in temperature will result in a 5.65% decrease in agricultural income, i.e., a loss of 7,692 FCFA/hectare on average. The analysis of the projected effects of climate variability through scenarios of increases in average temperatures of 1°C and 1.5°C and average annual decreases in rainfall of 5% and 8% showed that income losses will be accentuated. Thus, this situation calls for reflection on appropriate adaptation strategies to mitigate the adverse effects on family farming while taking into account the diversification of family farms.