Residents of Brockville, Ontario, should prepare for a return to cold weather and snow this week as temperatures are expected to drop significantly starting Wednesday, March 11, 2026. After a warm Monday, a cooling trend will bring freezing temperatures and potential icy conditions to the community.
The week begins with a high of 11°C on Monday, March 9, 2026, which is much warmer than the usual weather for this time of year. However, according to Environment Canada, this mild weather will not last as a cold front moves into the region.
On Wednesday, March 11, 2026, the weather will shift from rain to snow as the daytime high reaches only 3°C. Overnight on Wednesday, the temperature will drop to -3°C, which may create slippery roads and sidewalks for local drivers and pedestrians.
By Thursday, March 12, 2026, the daytime high will struggle to reach 0°C. The coldest point of the week is expected on Thursday night, when temperatures are forecast to fall to a low of -9°C.
Property owners are encouraged to watch for ice build-up following the mid-week mix of rain and snow. These changing conditions represent a return to more typical winter weather for the area after the brief warm spell.
