Residents in Kingston, Ontario, should prepare for a significant weather shift starting Wednesday, March 11, 2026, as mild temperatures give way to rain and snow. Environment Canada is forecasting a transition from double-digit highs to freezing conditions that will last through the end of the week.
The city will see a major drop in temperature between March 10 and March 12, 2026. Daytime highs are expected to fall from 11°C on Tuesday to 0°C by Thursday, with overnight lows reaching minus 8°C by Thursday night.
The weather change will begin with periods of rain on Wednesday that are expected to turn into snow by Wednesday night. Forecasters expect periods of snow to continue through Thursday, which could create slick road conditions for people driving on major routes like Highway 401.
This shift is driven by a process known as lake-effect snow. According to the National Weather Service, this occurs when cold air moves over the relatively warmer waters of the Great Lakes, picking up moisture that eventually falls as intense snow bands.
While the recent days have been mild, these upcoming conditions are a return to more typical winter weather for the region. Drivers and residents are encouraged to monitor local updates as the temperatures begin to drop mid-week.
