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Grimsby, Ontario has a humid continental climate, with warm, humid summers and cold, snowy winters. In the summer months, average temperatures range from 17 to 24 degrees Celsius, with sometimes reaching up to 30 degrees Celsius. In the winter months, average temperatures range from -8 to -2 degrees Celsius, with sometimes reaching down to -20 degrees Celsius.
The average annual precipitation in Grimsby is 845.2 millimetres. The area experiences the most rain in the summer months, with an average of 143.7 millimetres in July, and the least in the winter months, with an average of 46.3 millimetres in February. Snowfall is common in Grimsby, with an average of 147.6 centimetres in the winter months.
On average, Grimsby experiences 2,389 hours of sunshine each year, with the most in the summer months, and the least in the winter months. The average wind speed in Grimsby is 6.7 kilometres per hour.
As of 2020, the city population is 27314.
This map shows the current & 7-day weather forecast, weather alerts, and weather radar for Grimsby, Ontario.