A situation is continuously subject to changes. Therefore, all the representations and the mechanisms used in order to build up a situation model, must take the temporal factor into account. In order to model the current situation, information is collected from different sources, by different ways, and at different degrees of precision. Making such an information useful in a reasoning mechanism, requires a mechanism that is able to fuse information at different levels of uncertainty. The proposed model aims at classifying and representing the temporal information that may be used in the situation analysis process. The combination of multi-source fuzzy information is also addressed.