Consider the following premises. Mary is running or Thomas is not poor. Mary is not running. Thomas is poor if and only if it is snowing. Can we infer the following from them? It is not snowing.
 From the fact that Mary is running or Thomas is not poor we can infer that if Thomas were poor, then Mary is running. From the fact that if Thomas were poor, then Mary is running, and that Mary is not running we can infer that Thomas is not poor. Finally, from the fact that Thomas is poor if and only if it is snowing, and that Thomas is not poor we can infer that it is not snowing. Therefore, the answer is yes.