Normal weather for Ontario in December
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.
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.
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.
Ontario in December |
UK | ||
|---|---|---|---|
 Average Temperature |
4°C | 9°C | |
 High Temp |
7°C | 11°C | |
| Low Temp |
1°C | 8°C | |
 Total Precipitation |
74 mm | 67 mm | |
| Rainy Days |
9 days | 10 days | |
 Total Snowfall |
19 cm | 1,2 cm | |
| Snowy Days |
10 days | 1 day | |
Curious about the climate in other parts of Canada? Check out the weather and climate in places like Vancouver, Toronto, Niagara Falls, or have a look at other destinations in Canada.
Start of December
The month of December starts in Ontario with cold temperatures, averaging around 6°C during the day and nights close to 1°C. There’s little chance of precipitation. The weather is mostly sunny and dry.
Mid-December
By mid-December, the average daytime temperature drops to around 4°C, with nights close to -1°C. There might be a few showers during this period, but plenty of dry days with sunshine too.
End of December
By the end of December, the average daytime temperature in Ontario will be around 4°C, with nights close to -1°C. A shower might show up, but overall the weather will be dry and sunny.
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Temperature records for Ontario in December
With 16°C, Ontario hit the highest temperature in the last 10 years in December 2021. The lowest daytime temperature in this month was -14°C in 2017. The extreme night temperatures ranged from a low of -21°C to a high of 10°C.
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Daily Temperature in December in Ontario
This chart shows the average daily temperatures, both day and night, for each day in December in Ontario, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in December in Ontario
The chart below shows the average daily precipitation in December for Ontario, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for December, you can expect around 9 days of rain in Ontario.
Daily Snowfall in December in Ontario
This chart shows the average daily snowfall in December in Ontario, measured in centimetres. The bottom of the chart shows the days of the month. The data is based on historical measurements and gives an idea of the average snowfall in December.
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.
Temperature in December in Ontario Over the Years
This chart shows the average temperature in December in Ontario, measured in degrees Celsius, over the past years.
Total Precipitation in December in Ontario Over the Years
This chart shows the average precipitation in December in Ontario, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Snowfall in December in Ontario per year
This chart shows the average snowfall in December in Ontario, measured in centimetres, over the past years.
Daily climate in December for Ontario
Click on a specific day in December for detailed info on the typical weather on that day in Ontario. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in December in Ontario
Have you been to Ontario in December?
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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.
