Are you considering a trip to Ontario in December? Well, the weather is usually on your side with an average maximum temperature of +64°F and about 9 sunny days. Just keep in mind that there may be some rain, with an average of 8 rainy days and 78 mm of precipitation. Expect good weather and pack accordingly to enjoy the outdoors. Search flightsin one click on Avionero.
Good to know:
December is usually the coldest month of the year in Ontario;
Average weather
☀️
+64°F
Avg. max. temperature
+27°F
Min.
+86°F
Max.
78 mm
Total precipitation
58%
Avg. humidity
1 m/s
Avg. wind
9 ☀️
Sunny Days
14 ⛅️
Cloudy
8 🌦
Rainy
Our opinion: Ontario has good weather in December.
Avionero - Smarter Travel Planning for a Better World
Cheapest prices on the market!
Check all your dates and date combinations in a single search!
Want inspiration, set your dates and find the cheapest destinations!
Saves your searches in the browser so you can easily return to them!
Donates 10% of all revenue to charity!
Average temperature in Ontario in December
Here are the expected maximum, average and minimum temperatures in Ontario for December based on the historical data.
Last Year
Historical Data
The temperature in December is +70°F on average, with a range between a maximum of +82°F during the day and a minimum of +45°F at night.
The average maximum temperature goes down 14% by the end of the month, compared with the beginning of the month, from +64°F to +59°F.
Is Ontario warm or cold in December?
Ontario is typically mild in December.
Maximum temperatures go down compared to the previous month from +72°F to +64°F. The minimum temperature also goes down from +50°F to +46°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
December is the coldest month in Ontario, here is the comparison with other months:
Climate in Ontario in December
Ontario weather looks like this, on average, in December and the surrounding months.
November
December
January
Avg. temperature
+72°F
+64°F
+66°F
Min. temperature
+34°F
+27°F
+25°F
Max. temperature
+95°F
+86°F
+88°F
Rainfall
33 mm
78 mm
85 mm
Wind
1 m/s
1 m/s
1 m/s
Humidity
55%
58%
61%
Air pressure
1015 HPa
1017 HPa
1017 HPa
Sunny days
10
9
8
Cloudy days
14
14
14
Rainy days
5
8
9
Snowy days
0
0
0
December weather is still as good as in November.It’s getting colder in December. From +72°F in the day, the average maximum temperature lowers to +64°F.Prepare for more rain. Average rainfall goes from 33 mm to 78 mm.Humidity rises from 55% to 58%.The average wind speed doesn’t change much during December, staying around 1 m/s.The days becoming less sunny, going from 10 sunny days in November to 9 in December.
January brings much the same weather, it remains good.
Wind speed in Ontario in December based on historical data.
Last Year
Historical Data
The average wind speed is 2 m/s getting up to 4 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Ontario is gradually decreasing during December, going from 3 m/s to 2 m/s over the course of the month.
Rain
Amount of rainfall in mm during December in Ontario based on historical data.
Last Year
Historical Data
A chance of rain on a typical day in December stands at 32%, leading to total precipitation of around 77 mm. The maximum amount of rainfall per day is around 27 mm, which is moderate rain.December is a pretty wet month with over 10 rainy days, so don’t forget to pack an umbrella, raincoat, and a pair of wellies.
December is one of the rainiest months in Ontario, here is a comparison with other months, total mm:
Ontario wettest month is February, where a typical day has a 32% chance of precipitation and 99 mm of rainfall per day. June, on the other hand, is the driest month with a mere 3% chance of precipitation and 2 mm of rainfall per day.
How was the weather last December in Ontario?
This is the weather in Ontario in December 2024:
1 December
☁️
+65°F
2 December
☀️
+67°F
3 December
☀️
+68°F
4 December
☁️
+77°F
5 December
☀️
+82°F
6 December
☀️
+80°F
7 December
🌫️
+73°F
8 December
☀️
+66°F
9 December
☀️
+71°F
10 December
☀️
+74°F
11 December
☁️
+75°F
12 December
☀️
+72°F
13 December
☀️
+69°F
14 December
☀️
+73°F
15 December
☁️
+77°F
16 December
☁️
+79°F
17 December
☁️
+77°F
18 December
☁️
+73°F
19 December
🌧️
+70°F
20 December
🌧️
+66°F
21 December
☁️
+67°F
22 December
🌧️
+65°F
23 December
🌧️
+63°F
24 December
🌫️
+64°F
25 December
☀️
+68°F
26 December
☁️
+67°F
27 December
☁️
+67°F
28 December
🌫️
+67°F
29 December
🌫️
+69°F
30 December
🌫️
+67°F
31 December
☁️
+59°F
In December 2024 Ontario had 11 sunny days, 11 cloudy days, and 4 rainy days. The average maximum temperature was +70°F, with an absolute maximum of +82°F and a minimum of +59°F. The average humidity was 58%, with a maximum of 100% and a minimum of 11%. The average wind speed was 2 m/s, with a maximum of 11 m/s and a minimum of 0 m/s.
Are you planning a trip in December?
Climate Change Over the Years
This is how Ontario climate has changed over the last 43 years.
The climate in Ontario in December has not changed that much over the last 43 years.
The average temperature was the lowest in 1998 (+74°F) and the highest in 2014 (+82°F). The driest year was 1989 with only 153 mm of rainfall, and the wettest year was 2022 with 1158 mm.
FAQ
Frequently asked questions about the weather in Ontario in December:
Is December a good time to visit Ontario?
December is a really good time to go to Ontario. The weather is nice so plan your packing around outdoor activities and exploring. Check out other good time to visit Ontario.
Can you sunbathe in Ontario in December?
December has mild temperatures in Ontario. Not ideal for sunbathing, but still good for daytime outdoor activities, but plan for cool evenings. Pack a light jacket and shorts!
Is Ontario rainy in December?
Ontario is often rainy in December. You may get a bit damp when outside, so pack an umbrella, and maybe even a raincoat.
Is it sunny in Ontario in December?
Usually, it’s not very sunny in Ontario in December, often it’s pretty cloudy. Pack for any eventuality; layering can help reduce the number of bulky items needed.
For this page, we’ve looked at the typical weather in Ontario, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
