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June 17th, 2026 :: 6:11 pm EDT   

Local Weather Report for
Harriston
Ontario, Canada

 Harriston Weather Forecast Summary  
 
Today
Jun 17th 		Thursday
Jun 18th 		Friday
Jun 19th 		Saturday
Jun 20th 		Sunday
Jun 21st
Mostly Cloudy with Showers Mostly Cloudy with Showers Mostly Sunny Sunny Mostly Sunny
19°C
 17°C
11°C		 16°C
8°C		 17°C
6°C		 16°C
6°C
 
 Harriston Detailed Weather Forecast  
 
Wednesday, June 17th, 2026
Evening Temperature: 13°C
Cloudy with a few showers. Windy.
Thursday, June 18th, 2026
Overnight Temperature: 15°C
A mix of cloudy and clear skies with a few showers. Slight chance of a thunderstorm. Windy.
Morning Temperature: 12°C
A mix of cloud and sun with a chance of showers. Windy at times.
Afternoon Temperature: 12°C
A mix of cloud and sun. Windy at times.
Evening Temperature: 13°C
Mostly clear. Windy.
Friday, June 19th, 2026
Overnight Temperature: 10°C
Mostly clear. Windy at times.
Morning Temperature: 12°C
A mix of cloud and sun. Windy.
Afternoon Temperature: 16°C
Sunny. Windy.
Evening Temperature: 10°C
Clear. Windy at times.
Saturday, June 20th, 2026
Overnight Temperature: 6°C
Clear. Windy at times.
Morning Temperature: 13°C
Sunny. Windy at times.
Afternoon Temperature: 17°C
Sunny. Windy at times.
Evening Temperature: 12°C
Clear. Slight chance of a thunderstorm.
Sunday, June 21st, 2026
Overnight Temperature: 8°C
Clear.
Morning Temperature: 13°C
Mostly sunny. Windy at times.
Afternoon Temperature: 16°C
Sunny with cloudy periods. Windy at times.
Evening Temperature: 9°C
Mostly clear.
Monday, June 22nd, 2026
Overnight Temperature: 7°C
A mix of cloudy and clear skies. Windy at times.
Morning Temperature: 13°C
A mix of cloud and sun. Windy.
Afternoon Temperature: 18°C
Sunny. Windy.
Evening Temperature: 12°C
Clear. Windy at times.
Tuesday, June 23rd, 2026
Overnight Temperature: 8°C
Clear.
Morning Temperature: 15°C
Sunny.
Afternoon Temperature: 19°C
Mostly cloudy with a chance of showers. Slight chance of a thunderstorm.
Evening Temperature: 14°C
Mostly cloudy with a chance of showers.
Wednesday, June 24th, 2026
Overnight Temperature: 11°C
A mix of cloudy and clear skies.
Morning Temperature: 13°C
Cloudy with a slight chance of showers.
Afternoon Temperature: 17°C
A mix of sun and cloud.
Evening Temperature: 14°C
Clear.
Thursday, June 25th, 2026
Overnight Temperature: 10°C
Clear.
Morning Temperature: 17°C
Sunny.
Afternoon Temperature: 22°C
Mostly sunny.
Evening Temperature: 17°C
Mostly clear.



 

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This WeatherCity Weather Forecast for Harriston, 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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