Clover stem borers,Languria mozardiLatreille, were reared at constant temperatures ranging from 12° to 39°C on artificial diet. Development times were inversely proportional to temperature between 12 and 35°C and increased above 35°C. The duration of preimaginal development (egg to adult) varied from 90.5 d at 15°C to 20.9 d at 35°C. The optimal temperature for development was about 30°C. Parameter values were reported for the Weibull distribution fitted to mean normalized development times (r2= 0.993–0.998) and for a biophysical model fitted to development rates of each stage (r2= 0.991–0.999). A six parameter model with high- and low-temperature inhibition was derived for the egg stage. Four parameter models with high-temperature inhibition were proposed for development rates of the larvae and pupae. The predictions of these models, combined with estimates of oviposition rates, should facilitate development of efficient sampling protocol for all stages of clover stem borers.