Ontario Weather in December
December in Ontario sees daytime temperatures around 4°C (39°F) and lows of -6°C (21°F) at night. As the wettest month of the year, keep in mind that snow/rainfall is at its highest.
Rainfall in Ontario in December
The month brings the most rain, so be prepared with an umbrella for the occasional shower. You can expect snow/rain on roughly 13 days based on historical data, averaging 45 mm (1.8 in) for the month. The rainfall pattern this month is fairly balanced. Showers tend to be moderate rather than extreme.
Temperature in Ontario in December
In December, Ontario gets low temperatures, with highs of 4°C (39°F). Nights cool to around -6°C (21°F). During December, the winter season is in full swing. Time outdoors is usually more comfortable with proper winter clothing and protection from wind. Nights drop below freezing to -6°C (21°F). An extra blanket is worth packing if you're unsure about the heating where you're staying. With the coldest weather of the year, this month demands extra warmth. Be sure to layer up to stay comfortable.If you prefer dry days with pleasant temperatures, December may not be the ideal month to visit Ontario. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Ontario's climate page.
Ontario Temperature in December
Min Temperature
-6°C (21°F)
Max Temperature
4°C (39°F)
Chance of Rain
43%
Precipitation
45 mm (1.8 in)
Rainy days
13 days
Best Places in the United States of America in December
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in December →
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What to Wear in Ontario in December
We recommend to layer up for chilly conditions in Ontario in December. You could start with thermal underwear or a good base layer to keep your core warm on the cooler days this month. Maybe also add a sweater or fleece, and top it off with a windproof jacket. Rain is likely on several days, so bring a good rain jacket.What To Do in Ontario in December
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Ontario's climate page.
See the full Ontario climate overview or explore weather in the United States of America.
