forecast
detailed forecast
| Extented weather forecast for Cornwall Ontario and the Seaway Issued by Environment Canada at 1100 ET Tue Jul 21 2026 |
| Today: Mainly cloudy. 40 percent chance of showers early this afternoon. Showers beginning this afternoon. Risk of a thunderstorm. Local amount 5 mm. Wind south 20 km/h gusting to 40. High 25. Humidex 30. Uv index 7 or high. Tonight: Showers ending near midnight then cloudy with 40 percent chance of showers. Risk of a thunderstorm this evening. Local amount 10 to 15 mm. Wind southwest 20 km/h. Low 17. Wednesday: Cloudy. 40 percent chance of showers in the morning. Wind west 20 km/h gusting to 40. High 21. Uv index 5 or moderate. Wednesday Night: Cloudy periods with 30 percent chance of showers. Low 11. Thursday: Sunny. High 24. Thursday Night: Clear. Low 13. Friday: Sunny. High 27. Friday Night: Clear. Low 14. Saturday: Sunny. High 28. Saturday Night: Cloudy periods with 30 percent chance of showers. Low 17. Sunday: Cloudy with 40 percent chance of showers. High 28. Sunday Night: Cloudy with 40 percent chance of showers. Low 17. Monday: Cloudy with 30 percent chance of showers. High 24. |
regional radar
news headlines
U.S. President Donald Trump's surprise escalation in his trade war with Canada puts renewed pressure on the premiers — most . . . more
More than 30 American states have reported illnesses related to Cyclospora, an intestinal parasite that contaminates food that has come . . . more
One of the Toronto police officers charged in the sweeping police corruption and organized crime investigation dubbed Project South pleaded . . . more
Surveillance pricing, where businesses use consumer data to offer different prices based on what they think each individual customer will . . . more
sports headlines
Wheelchair basketball player Kady Dandeneau and lawn bowler Ryan Bester will lead Canada’s delegation at the opening ceremony for the . . . more
Canadian forward Jordyn Huitema has ruptured the anterior cruciate ligament in her left leg and will miss the rest of . . . more
It seems like yesterday and forever ago when Owen Goodman, Canada’s 22-year-old goalkeeper of the future, sat beside the pool . . . more
Canadian researcher Margie Davenport is helping pregnant and postpartum soccer players keep playing the game they love. . . . more
Saskatchewan Roughriders linebacker Jayden Dalke was driving the wrong way on the highway with alcohol and cannabis in his vehicle . . . more
uv forecast
air quality health index
weather alert
explore the seaway city
discover the counties of sdg
