Data on microfungi isolated from the soils of four forests in southern Quebec were analysed, to detect seasonal changes in the community. Two-way analysis of variance showed that significant changes occurred for individual species, both between sites and sample times, and that significant season–site interactions occurred. Discriminant analysis showed that at all sites, there was a tendency for the community to shift towards a characteristic winter community during the colder periods of the year. Geomyces pannorus, Paecilomyces fumosoroseus, Pae. marquandii, Penicillium purpurogenum, Trichoderma koningii, T. polysporum, Botryotrichum piluliferum, Chrysosporum verrucosum, and Exophiala sp. LP111 were associated with samples from the colder months, in one or more of the sites. Sterile fungi, Fusarium solani, T. harzianum, T. hamatum, Pen. thomii, and Staphyotrichum coccosporum tended to be associated with the warmer months. There was also a tendency for samples from the seasonal "extremes" (warm dry summer samples and cold winter samples) to show some similarities. It is suggested that this trend may exist because fungi abundant during relatively unfavorable times of the year are not good competitors and therefore should be considered as "survivors." In this study, Exophiala sp. LP111, Gliomastix murorum, Paecilomyces carneus, T. viride, and Trichoderma sp. LP58 may fall into this category.