Weather St. Catharines, ON 1°C : -2°C Overcast : 9km/h N : 101.8 kPa : -6°C : 59% : -5°C / : 0°C Tonight -2°C Cloudy with clear breaks Tuesday morning -1°C Snow Tuesday afternoon 0°C Snow 0°C : 90% -3°C : 30% -5°C : 30% -8°C : 30% Stormdesk Link - MOVE