Residents in Cornwall, Ontario, are preparing for a significant warmup this week as temperatures are expected to reach double digits. According to Environment Canada, daytime highs will hit 11°C on Monday, March 09, and Tuesday, March 10, 2026.
These temperatures are much higher than what is usually expected for early March. A typical day during this time of year usually sees a high of only 1°C and overnight lows around -10°C.
The sudden warm spell follows a weekend of rain and mild weather, which is causing winter snowpacks to melt quickly. Local residents should watch for potential drainage issues as the melting snow combines with more precipitation expected later in the week.
The spring-like weather will not last long, as conditions are expected to change on Wednesday, March 11, 2026. The area will see a transition back to colder temperatures with periods of snow or flurries for the remainder of the week.
