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CanadaThe weather in December in Ontario
It's cold in December in Ontario with an average temperature of 4°C. Temperatures this month range from a low of 1°C to a high of 7°C. At night, you can expect temperatures between -4°C and 1°C.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in December for Ontario, Canada. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 16°C in 2021, Ontario reached the highest temperature in December over the past 10 years. The lowest daytime temperature in this month was -14°C in 2017. The extreme nighttime temperatures ranged from a lowest recorded value of -21°C to a highest value of 10°C.
Precipitation and snowfall
In December, there is an average of 74 mm of precipitation, spread over 9 days. Of the total precipitation, about 19 cm falls as snow in December. The wind speed is around 5 Bft, mostly coming from the Southwest.
Daily weather in December for Ontario
Click on any day in December to get detailed info about the usual weather on that day in Ontario. Check out the historical temperatures and precipitation over the past 10 years on this day.
December weather comparison
| Ontario | New York | |
|---|---|---|
| Average temperature | 4°C | 9°C |
| Max. temperature | 7°C | 12°C |
| Min. temperature | -4°C | -5°C |
| Total precipitation | 74 mm | 133 mm |
| Rainy days | 9 days | 17 days |
| Total snowfall | 19 cm | 9,7 cm |
| Snowy days | 10 days | 3 days |
Start of December
The month of December starts in Ontario with cold temps, averaging around 6°C during the day and nights around 1°C.
Mid December
By mid-December, daytime temps drop to around 4°C, with nights around -1°C. There’s a chance of some showers during this time, but plenty of dry and sunny days too.
End of December
By the end of December, the average daytime temperature in Ontario is around 4°C, while nighttime temps are about -1°C. A shower might pop up, but overall, the weather will be dry and sunny.
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UV index
The UV index is a maximum of 2 this month. That's a low value on the intensity scale of 1 to 11. The risk of sunburn is minimal at this time.
Check out the climate of Ontario for all months and discover the best travel time
Curious about the weather in other parts of Canada? Check out the climate and weather for spots like Vancouver, Toronto, Niagara Falls, or explore other destinations in Canada.
Temperature charts
These charts show the average temperatures in December in Ontario, Canada. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in December in Ontario
Temperature in December in Ontario over the years
Precipitation charts
These charts show the average amount of precipitation in December in Ontario, Canada. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in December in Ontario
Total precipitation in December in Ontario over the years
Daily Snowfall in December in Ontario
Snowfall in December in Ontario per year
Daily UV index in December in Ontario
This chart shows the average daily UV index in December in Ontario, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in December in Ontario
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Average weather in Ontario by month
Click on a month below to see detailed weather info for Ontario. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.