Average data for 10 years
1 December
Monday
+5°
−1°
2 December
Tuesday
+5°
0°
3 December
Wednesday
+5°
0°
4 December
Thursday
+5°
0°
5 December
Friday
+4°
−1°
6 December
Saturday
+2°
−2°
7 December
Sunday
+1°
−4°
8 December
Monday
+2°
−3°
9 December
Tuesday
+3°
−2°
10 December
Wednesday
+3°
−3°
11 December
Thursday
+2°
−3°
12 December
Friday
+2°
−4°
13 December
Saturday
+3°
−3°
14 December
Sunday
+4°
−2°
15 December
Monday
+4°
−1°
16 December
Tuesday
+3°
−1°
17 December
Wednesday
+1°
−3°
18 December
Thursday
+1°
−4°
19 December
Friday
+1°
−5°
20 December
Saturday
+1°
−4°
21 December
Sunday
+1°
−3°
22 December
Monday
+1°
−3°
23 December
Tuesday
+2°
−4°
24 December
Wednesday
0°
−5°
25 December
Thursday
0°
−4°
26 December
Friday
+2°
−4°
27 December
Saturday
+2°
−3°
28 December
Sunday
+3°
−3°
29 December
Monday
+3°
−1°
30 December
Tuesday
+2°
−4°
31 December
Wednesday
+1°
−2°
Cities with similar weather in December
Belarus
Gomel
Finland
Helsinki
Estonia
Tallinn
Lithuania
Vilnius
Belarus
Bobruisk
December in Ottawa is the cloudiest month of the year. In December, the weather in Ottawa is typically cold. Average daily high temperature in December is about 2 degrees above zero. On average, Ottawa has 9 cloudy, 9 partly cloudy, 6 sunny, 4 rainy, and 3 snowy days in December. The rains are usually moderate. December as well as January, February, March, and April is considered the most uncomfortable time to visit Ottawa.