There is no question that climate change during the last century has had a significant impact on winter hydrology in Ontario, Canada. On the basis of data from 13 climatological stations from across Ontario, Canada, for the last 70 years of record, time series for a number of winter temperature variables revealed steady and significant upward trends. There were no significant trends in the time series of total winter precipitation; however, winter rainfall revealed increasing trends and winter snowfall revealed decreasing trends. Correspondingly, winter rainfall as a percentage of total...