Ontario Weather in December

December in Ontario sees daytime temperatures around 19°C (66°F) and lows of 6°C (43°F) at night. As the wettest month of the year, keep in mind that rainfall is at its highest.

Rainfall in Ontario in December

Being the wettest month, having an umbrella on standby can help you avoid getting caught in the rain. Climate statistics over the past 30 years suggest around 8 days of rain, with 78 mm (3.1 in) average for the month. Rainfall intensity is on the higher side this month. Expect more substantial showers rather than light, passing rain.

Temperature in Ontario in December

December in Ontario brings typical temperatures with highs around 19°C (66°F) and lows of 6°C (43°F). During December, you'll experience the winter season. Even when the weather is stable, mornings and evenings can still feel distinctly cool. With overnight lows of 6°C (43°F), nights are cold. The cold air does make for deep, comfortable sleep if you have enough blankets. Experience the year's lowest temperatures this month, but they are still mild and pleasant.

Sunshine in Ontario in December

With approximately 205 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Should you favor a climate that's both dry and comfortably warm, January, February, March, April, May, October and November typically offer the most agreeable circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.