Environment Canada has issued a frost advisory for Ajax and the surrounding region, with freezing temperatures expected to continue through the weekend. The advisory, which carries a moderate impact level, warns that dropping temperatures may damage sensitive plants and crops.
Residents should prepare for cold overnight conditions starting Friday, May 1, 2026. The temperature is expected to hit a low of near or below 0°C on Friday night, with even colder weather arriving Saturday night as temperatures drop under clear skies.
To prevent damage, Environment Canada recommends that homeowners cover vulnerable plants with items like plastic containers, sheets, or bags. This is particularly important for gardens in low-lying or frost-prone areas where temperatures can fall more quickly.
While this cold snap may feel unexpected, frosty nights during the first week of May are a typical occurrence for the region. Conditions are expected to moderate by Sunday with a high of 13°C, followed by a warmer day on Monday with a high of 17°C and a 60 percent chance of rain.
The Weather Network and other official forecasters continue to monitor the situation as the community navigates this spring cool-down.
