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July 18th, 2026 :: 9:44 pm EDT   

Local Weather Report for
St Catharines
Ontario, Canada

 Current St Catharines Weather Conditions Updated July 18th at 9:00 pm 
Overcast smoke
Temperature:22°C Dew Point:18°C
Barometer:100.7 kPa Wind:N 38 Km/h
Humidity:78.1% Visibility:0 Km
 
 St Catharines Weather Forecast Summary  
 
Today
Jul 18th 		Sunday
Jul 19th 		Monday
Jul 20th 		Tuesday
Jul 21st 		Wednesday
Jul 22nd
Thundershowers Sunny Mostly Sunny Thundershowers Mostly Sunny
27°C
 25°C
16°C		 26°C
15°C		 23°C
20°C		 19°C
14°C
 
 St Catharines Detailed Weather Forecast  
 
Saturday, July 18th, 2026
Evening Temperature: 22°C
Mostly clear with showers likely. Slight chance of a thunderstorm. Windy at times.
Sunday, July 19th, 2026
Overnight Temperature: 17°C
Clear. Windy at times.
Morning Temperature: 19°C
Sunny. Windy at times.
Afternoon Temperature: 24°C
Sunny.
Evening Temperature: 19°C
Clear.
Monday, July 20th, 2026
Overnight Temperature: 16°C
Clear.
Morning Temperature: 21°C
Sunny.
Afternoon Temperature: 26°C
Sunny with cloudy periods. Windy at times.
Evening Temperature: 21°C
A mix of cloudy and clear skies.
Tuesday, July 21st, 2026
Overnight Temperature: 20°C
Clear with cloudy periods.
Morning Temperature: 22°C
Mostly cloudy with a chance of showers. Windy at times.
Afternoon Temperature: 23°C
A mix of cloud and sun with showers likely. Chance of a thunderstorm. Windy.
Evening Temperature: 21°C
Mostly cloudy with a few showers. Chance of a thunderstorm. Windy at times.
Wednesday, July 22nd, 2026
Overnight Temperature: 17°C
Mostly clear with a chance of showers.
Morning Temperature: 17°C
Mostly sunny. Windy at times.
Afternoon Temperature: 19°C
A mix of cloud and sun with a slight chance of showers. Windy at times.
Evening Temperature: 15°C
A mix of cloudy and clear skies with a slight chance of showers. Windy at times.
Thursday, July 23rd, 2026
Overnight Temperature: 14°C
A mix of cloudy and clear skies.
Morning Temperature: 17°C
Mostly sunny. Windy at times.
Afternoon Temperature: 23°C
Mostly sunny. Windy at times.
Evening Temperature: 19°C
Clear.
Friday, July 24th, 2026
Overnight Temperature: 15°C
Clear.
Morning Temperature: 20°C
Sunny.
Afternoon Temperature: 26°C
Mostly sunny.
Evening Temperature: 20°C
Mostly clear.
Saturday, July 25th, 2026
Overnight Temperature: 18°C
A mix of cloudy and clear skies.
Morning Temperature: 23°C
A mix of sun and cloud.
Afternoon Temperature: 28°C
Sunny. Windy at times.
Evening Temperature: 22°C
Mostly clear. Windy at times.
Sunday, July 26th, 2026
Overnight Temperature: 19°C
Clear with cloudy periods.
Morning Temperature: 23°C
Sunny.
Afternoon Temperature: 27°C
Sunny. Windy at times.
Evening Temperature: 23°C
Mostly clear.



 

  [ Local Weather Report ]
Niagara-on-the-lake, ON 
9:00 PM  22°C
Overcast smoke
 
Thorold, ON 
9:00 PM  22°C
Overcast smoke
 
Lewiston, NY 
8:53 PM  22°C
Overcast haze
 
Youngstown, NY 
 
Niagara Falls, ON 
 
Niagara Falls, NY 
8:53 PM  22°C
Overcast haze
 
Pelham, ON 
 
White Pigeon, ON 
 
Welland, ON 
 
Lincoln, ON 
9:00 PM  23°C
 

 
This WeatherCity Weather Forecast for St Catharines, Ontario, Canada is computed using a computer-generated forecast model and should be considered experimental. Please confirm this weather information with your official weather information office
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