St. Catharines Weather Forecast

For Wednesday June 1, 2022
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  • Tonight – A few clouds. Increasing cloudiness late this evening then 40 percent chance of showers before morning. Risk of a thunderstorm before morning. Wind southwest 20 km/h gusting to 40 becoming light early this evening. Low 19.
  • Wednesday – Mainly cloudy with 60 percent chance of showers and risk of a thunderstorm. High 23. Humidex 30. UV index 7 or high.
  • Wednesday Night – Clearing late in the evening. Wind north 30 km/h becoming light early in the evening. Low 11.