Ontario weather in December
Are you planning a trip to Ontario in December and wondering what kind of weather to expect? This page has all the details you need.
What is the weather like in Ontario in December?
Ontario is a region in Canada. Ontario has a wide variety of climate types. During December, you can expect temperatures that range from very cold to cold and precipitation levels ranging from moderate to high. During December, winter is in full swing.
The average highest temperatures fluctuate between very cold in Red Lake at -9°C to cold in Saint Catharines at 4°C. Nighttime temperatures generally drop to -1°C in Saint Catharines and -17°C in Red Lake. In many areas in Canada, December brings with it chilling temperatures. When visiting these parts during this time, it's of utmost importance to be ready. Choose clothing that is both layered and insulating to combat the cold effectively.
In December, precipitation varies across different areas. From moderate snowfall in Red Lake with an average of 31 mm to high snowfall in Rockport with 110 mm. Most areas see fewer sunny days, with a projection of about 78 hours of sunshine in Toronto. This reduced sunlight makes it ideal for those who prefer dimmer, overcast conditions over bright sunny days.
To learn more about the conditions in specific areas of Ontario in December, check out the map below. For more details on the yearly weather, visit our Ontario climate page.
Where to go in Ontario in December
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Popular destinations in Ontario
What is the weather like in December for the 5 most popular destinations in Ontario?
Average weather in Toronto
In December Toronto generally has low temperatures with maximum daytime temperatures around 4°C, minimum nighttime temperatures around -3°C and moderate monthly snow/rainfall. So on average the conditions are poor that month.
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Average weather in Ottawa
In December Ottawa generally has very low temperatures with maximum daytime temperatures around -0°C, minimum nighttime temperatures around -9°C and moderate monthly snowfall. So on average the conditions are poor that month.
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Average weather in Niagara Falls
In December Niagara Falls generally has low temperatures with maximum daytime temperatures around 4°C, minimum nighttime temperatures around -3°C and moderate monthly snow/rainfall. So on average the conditions are poor that month.
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Average weather in Mississauga
In December Mississauga generally has low temperatures with maximum daytime temperatures around 3°C, minimum nighttime temperatures around -3°C and moderate monthly snow/rainfall. So on average the conditions are poor that month.
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Average weather in Niagara on the Lake
In December Niagara on the Lake generally has low temperatures with maximum daytime temperatures around 3°C, minimum nighttime temperatures around -2°C and moderate monthly snow/rainfall. So on average the conditions are poor that month.
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Is your destination not in the list? Have a look at other destinations in Ontario, in Canada.
Is December the best time to visit Ontario?
In our opinion, December may not be the ideal time to visit Ontario due to the typically poor weather in Toronto.
Generally speaking, the best visiting conditions can be found in June, July, August and September offering mostly perfect weather in Toronto. In contrast, January, February, March, April, November and December tend to have poor weather conditions.
Interested in more climate information?
We have much more information about the climate in Ontario.
Interested in the weather conditions in a specific month? Select the month below.
Weather and climate has detailed information for every country in the world. Are you going to Canada? Get detailed historical weather averages for many cities in Canada.
Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.