Current Conditions
More Information
WeatherCity Home
Switch to Imperial Units
[ Almanac ]  
Sunrise:  5:53 am
Sunset:  8:48 pm
[ Moon Phases ]  

First Quarter
May 24

Full Moon
Jun 1

Last Quarter
Jun 8

New Moon
Jun 16




May 20th, 2026 :: 2:44 am EDT   

Local Weather Report for
St Marys
Ontario, Canada

 St Marys Weather Forecast Summary  
 
Today
May 20th 		Thursday
May 21st 		Friday
May 22nd 		Saturday
May 23rd 		Sunday
May 24th
Mostly Sunny Mostly Sunny Mix of Cloud and Sun Cloudy Showers
10°C
 14°C
3°C		 14°C
4°C		 11°C
9°C		 13°C
9°C
 
 St Marys Detailed Weather Forecast  
 
Wednesday, May 20th, 2026
Overnight Temperature: 8°C
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 7°C
Mostly sunny. Windy.
Afternoon Temperature: 10°C
Mostly sunny. Windy.
Evening Temperature: 5°C
Mostly clear. Windy at times.
Thursday, May 21st, 2026
Overnight Temperature: 4°C
Mostly clear.
Morning Temperature: 8°C
Mostly sunny. Windy at times.
Afternoon Temperature: 13°C
Mostly sunny. Windy at times.
Evening Temperature: 8°C
Mostly clear.
Friday, May 22nd, 2026
Overnight Temperature: 4°C
Mostly clear. Windy at times.
Morning Temperature: 9°C
A mix of cloud and sun. Windy.
Afternoon Temperature: 13°C
A mix of cloud and sun. Windy at times.
Evening Temperature: 10°C
A mix of cloudy and clear skies. Windy at times.
Saturday, May 23rd, 2026
Overnight Temperature: 10°C
Cloudy with a chance of showers. Windy.
Morning Temperature: 10°C
Cloudy with a slight chance of showers. Windy.
Afternoon Temperature: 10°C
Mostly cloudy. Windy.
Evening Temperature: 9°C
Mostly cloudy. Windy.
Sunday, May 24th, 2026
Overnight Temperature: 9°C
A mix of cloudy and clear skies. Windy.
Morning Temperature: 10°C
Cloudy. Windy at times.
Afternoon Temperature: 12°C
Cloudy with showers. Windy at times.
Evening Temperature: 13°C
A mix of cloudy and clear skies with a few showers.
Monday, May 25th, 2026
Overnight Temperature: 11°C
A mix of cloudy and clear skies.
Morning Temperature: 12°C
A mix of cloud and sun.
Afternoon Temperature: 19°C
Mostly sunny.
Evening Temperature: 15°C
Mostly clear.
Tuesday, May 26th, 2026
Overnight Temperature: 12°C
Clear with cloudy periods.
Morning Temperature: 16°C
A mix of sun and cloud. Windy at times.
Afternoon Temperature: 21°C
Mostly cloudy. Windy at times.
Evening Temperature: 18°C
Cloudy.
Wednesday, May 27th, 2026
Overnight Temperature: 16°C
Cloudy with showers likely. Windy at times.
Morning Temperature: 19°C
Mostly cloudy with a chance of showers. Slight chance of a thunderstorm. Windy at times.
Afternoon Temperature: 23°C
A mix of cloud and sun with showers likely. Chance of a thunderstorm. Windy at times.
Evening Temperature: 20°C
Clear with showers likely. Chance of a thunderstorm.



 

  [ Local Weather Report ]
Saint Marys, ON 
 
Browns Corners, ON 
 
Blanshard, ON 
 
Downie, ON 
 
Granton, ON 
 
Thorndale, ON 
 
Stratford, ON 
 
Holiday, ON 
 
South Easthope, ON 
 
Lucan, ON 

 
This WeatherCity Weather Forecast for St Marys, 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
  St Marys weather brought to you by WeatherCity Server: us-chi1   Rendered in 0.00242s  
Home   |   About WeatherCity