St. Catharines Weather Forecast – Local Skim St. Catharines

Tonight – Mainly cloudy. 40 percent chance of showers early this evening. Fog patches developing this evening. Wind southwest 20 km/h becoming light early this evening. Low 6.
Tuesday – A mix of sun and cloud. Becoming cloudy late in the morning with 40 percent chance of showers in the afternoon. Rain beginning late in the afternoon. Risk of a thunderstorm late in the afternoon. Amount 5 mm. Wind becoming northeast 20 km/h in the afternoon. High 15. UV index 7 or high.
Tuesday Night – Showers at times heavy ending near midnight then cloudy with 40 percent chance of showers. Risk of a thunderstorm in the evening and overnight. Amount 10 to 20 mm. Wind northeast 20 km/h becoming light after midnight. Low 8.