Temperatures are expected to dip near or below freezing overnight into Friday morning. Environment Canada predicts patchy frost likely under clearing skies as cold air settles in.

The advisory covers a wide stretch of southern Ontario, including municipalities such as Hamilton, Mississauga, Brampton, and Durham Region.

Officials report a moderate impact level with high confidence in the forecast. Jessie Uppal from Environment Canada noted that frost is typically experienced in the GTA during the last week of April and first week of May.

Residents are advised to cover vulnerable plants or bring potted ones indoors. This is especially important in frost-prone or low-lying areas where temperatures can fall more quickly.

The weather forecast indicates Thursday’s high will only reach 11°C with scattered showers. Friday’s high is expected near 10°C, with a low around 1°C and potential for flurries.

This chilly start to May will see daytime highs struggling to reach the low teens. The region is preparing for an unusual cold spell as spring progresses.

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