Average data for 10 years
1 December
Sunday
+5°
+1°
2 December
Monday
+5°
+2°
3 December
Tuesday
+4°
+2°
4 December
Wednesday
+4°
+2°
5 December
Thursday
+4°
+1°
6 December
Friday
+2°
−1°
7 December
Saturday
+2°
0°
8 December
Sunday
+1°
−1°
9 December
Monday
+1°
−1°
10 December
Tuesday
+2°
0°
11 December
Wednesday
+2°
0°
12 December
Thursday
+4°
+1°
13 December
Friday
+2°
0°
14 December
Saturday
+1°
0°
15 December
Sunday
+2°
−1°
16 December
Monday
0°
−2°
17 December
Tuesday
+1°
−1°
18 December
Wednesday
+2°
0°
19 December
Thursday
+1°
−1°
20 December
Friday
+2°
0°
21 December
Saturday
+2°
+1°
22 December
Sunday
+2°
−1°
23 December
Monday
−1°
−1°
24 December
Tuesday
0°
−2°
25 December
Wednesday
0°
−3°
26 December
Thursday
−2°
−3°
27 December
Friday
+1°
0°
28 December
Saturday
+2°
0°
29 December
Sunday
+1°
−2°
30 December
Monday
0°
−4°
31 December
Tuesday
0°
−4°
Cities with similar weather in December
Hungary
Budapest
Kyrgyzstan
Bishkek
Bulgaria
Sofia
Kazakhstan
Aktau
United States
Boston
In December, the weather in Ontario is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Ontario has 10 partly cloudy, 9 sunny, 8 rainy, 2 snowy, and 2 cloudy days in December. The rains are usually moderate. December as well as January is considered the most uncomfortable time to visit Ontario.