Sol-gel deposited electrochromic WO3/TiO2 films have been reversibly cycled at temperatures up to 70 degreesC using a constant-current charge injection technique, in a stringently dry environment. The resultant switching voltages have been simulated with a model involving several parameters including the chemical diffusion coefficient (D) of lithium in the films. The experimental data at various elevated temperatures have been fitted with the model by varying the diffusion coefficient at each temperature and holding other parameters constant. The Values of D estimated from the simulation of experimental data are within the range of published Values for similar films, however there are some limitations due to assumptions made in the model. This paper discusses the application of the model for the prediction of cycling voltages at high temperatures and the suitability of the model in the estimation of the chemical diffusion coefficient (D).