Thursday
Chance of showers
High:
20°C
Cloudy with 60 percent chance of showers. High 20.
St. Catharines, Ontario Weather - Extended Forecast
Thursday Night
Cloudy periods
Overnight low:
13°C
Cloudy periods. Low 13.
Friday
Chance of showers
High:
21°C
Friday Night
Cloudy
Overnight low:
16°C
Saturday
Chance of showers
High:
20°C
Saturday Night
Chance of showers
Overnight low:
12°C
Sunday
Sunny
High:
23°C
Sunday Night
Chance of showers
Overnight low:
15°C
Monday
Chance of showers
High:
20°C