Brockville residents should prepare for a chilly and unsettled week as temperatures drop following a warm weekend. According to Environment Canada, the region is facing a significant cool-down that will see temperatures dip below seasonal averages for this time of year.
Conditions today, April 19, 2026, are expected to reach a high of 6°C with a 60 per cent chance of rain showers or snow. The weather will turn much colder overnight, with a low of -2°C and a wind chill reaching -8. Residents heading out on Monday should plan for a mix of sun and cloud with a high of 3°C, though morning wind chills are expected to feel like -8.
The colder weather is part of a broader pattern of fluctuating temperatures expected this spring. The Weather Network notes that climate phenomena like La Niña and the polar vortex have contributed to a fickle start to the season, leading to more detours in typical spring weather than usual. Their seasonal forecast for Ontario suggests that colder-than-normal temperatures and periods of snow could continue through the month of April.
Looking ahead, temperatures in Brockville are expected to undergo a gradual warming trend. Tuesday will see a high of 5°C with a 60 per cent chance of flurries or rain, followed by a high of 12°C on Wednesday. By Thursday, temperatures will climb to 15°C, with similar highs expected heading into Friday and Saturday. Currently, there are no weather alerts in effect for the area.
