Canada Winter Temperature Departures, 1948-2010. Environment Canada

The temperature trend graph shows that winter temperatures have remained at or above normal since 1997. The red dashed line indicates winter temperatures have warmed over the last 63 years by 2.5°C. The winter season shows the greatest warming of any season, but all seasons have shown a warming trend since 1948.

Climate Trends and Variations Bulletin, Winter 2009/2010