Weather in Ontario in December
Ontario, United States averages a high of 17.4°C (63.3°F) and low of 6.6°C (43.9°F) in December, with 5 rain days and 8.3 hours of daily sunshine. Travel score: 79.5/100 (Good). The best time to visit Ontario is July.
High
17°C63°F
Low
7°C44°F
🌧️
5
rain days
☀️
8.3
hrs/day sunshine
💧
60%
humidity
80— Good
December in Ontario is mild and mostly dry — good for most activities.
What are the average temperatures in Ontario?
How much does it rain in Ontario in December?
Ontario receives an average of 64.7mm of rainfall across 5 rainy days in December. The annual total is 403.1mm.
What should I pack for Ontario in December?
Essentials
👟
Comfortable walking shoes
Essential for exploring the city
🧥
Mix of light and warm layers
Mild temperatures around 17°C
Recommended
🧴
Sunscreen
Sun protection is still recommended
🕶️
Sunglasses
Useful for sunny periods
Traveling to United States in December?
Don't let a public holiday surprise you — restaurants, shops, and attractions may be closed.
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Data based on 1994–2024 averages · Last updated: 2024-12-31