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November 17th, 2025 :: 8:11 am EST   

Local Weather Report for
Newcastle
Ontario, Canada

 Newcastle Weather Forecast Summary  
 
Today
Nov 17th
Tuesday
Nov 18th
Wednesday
Nov 19th
Thursday
Nov 20th
Friday
Nov 21st
Cloudy Cloudy Cloudy Cloudy Cloudy
3°C
4°C
-3°C
4°C
-3°C
5°C
-1°C
10°C
0°C
 
 Newcastle Detailed Weather Forecast  
 
Monday, November 17th, 2025
Morning Temperature: 2°C
Cloudy. Windy.
Afternoon Temperature: 1°C
Sunny. Windy at times.
Evening Temperature: -2°C
Clear.
Tuesday, November 18th, 2025
Overnight Temperature: -3°C
Clear.
Morning Temperature: 2°C
Cloudy.
Afternoon Temperature: 0°C
Cloudy.
Evening Temperature: -2°C
Clear.
Wednesday, November 19th, 2025
Overnight Temperature: -3°C
Clear.
Morning Temperature: 3°C
A mix of cloud and sun.
Afternoon Temperature: 0°C
Cloudy.
Evening Temperature: -1°C
Cloudy.
Thursday, November 20th, 2025
Overnight Temperature: -1°C
Cloudy.
Morning Temperature: 4°C
Sunny with cloudy periods.
Afternoon Temperature: 2°C
Cloudy.
Evening Temperature: 2°C
A mix of cloudy and clear skies.
Friday, November 21st, 2025
Overnight Temperature: 4°C
Cloudy.
Morning Temperature: 8°C
Cloudy. Windy.
Afternoon Temperature: 4°C
Cloudy. Windy.
Evening Temperature: 0°C
Cloudy.
Saturday, November 22nd, 2025
Overnight Temperature: 0°C
Cloudy.
Morning Temperature: 3°C
Cloudy.
Afternoon Temperature: 1°C
Sunny.
Evening Temperature: -2°C
Cloudy.
Sunday, November 23rd, 2025
Overnight Temperature: -1°C
Cloudy.
Morning Temperature: 3°C
Mostly cloudy.
Afternoon Temperature: 2°C
Sunny with cloudy periods.
Evening Temperature: 2°C
A mix of cloudy and clear skies.
Monday, November 24th, 2025
Overnight Temperature: 2°C
Cloudy.
Morning Temperature: 6°C
A mix of cloud and sun. Windy at times.
Afternoon Temperature: 4°C
Sunny.
Evening Temperature: 1°C
Cloudy.
Tuesday, November 25th, 2025
Overnight Temperature: 1°C
Cloudy.
Morning Temperature: 6°C
A mix of cloud and sun.
Afternoon Temperature: 5°C
Cloudy.
Evening Temperature: 4°C
Cloudy with a chance of showers. Showers possibly mixed with wet flurries.





 

  [ Local Weather Report ]
Bowmanville, ON 
7:01 AM  -1°C
light snow
 
Port Darlington, ON 
7:01 AM  -1°C
light snow
 
Clarington, ON 
7:01 AM  -1°C
light snow
 
Salem, ON 
7:01 AM  -1°C
light snow
 
Tyrone, ON 
7:01 AM  -1°C
light snow
 
Decker Hollow, ON 
 
Pontypool, ON 
 
Burketon Station, ON 
7:01 AM  -1°C
light snow
 
Oshawa, ON 
7:01 AM  -1°C
light snow
 
Port Hope, ON 
7:00 AM  -1°C
 

 
This WeatherCity Weather Forecast for Newcastle, 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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