St. Catharines Weather Forecast

For Tuesday May 31, 2022
/ by
  • Tonight – Clear. Wind southwest 30 km/h becoming light early this evening. Low 19.
  • Tuesday – Sunny. Wind becoming southwest 20 km/h gusting to 40 in the morning. High 30. Humidex 34. UV index 10 or very high.
  • Tuesday Night – Clear in the evening then partly cloudy with 40 percent chance of showers before morning. Risk of a thunderstorm before morning. Low 19.