Average data for 10 years
1 December
Monday
+9°
+4°
2 December
Tuesday
+9°
+1°
3 December
Wednesday
+9°
+2°
4 December
Thursday
+9°
+2°
5 December
Friday
+8°
+2°
6 December
Saturday
+7°
+1°
7 December
Sunday
+6°
+1°
8 December
Monday
+6°
0°
9 December
Tuesday
+7°
+1°
10 December
Wednesday
+8°
+2°
11 December
Thursday
+8°
+1°
12 December
Friday
+7°
+1°
13 December
Saturday
+6°
0°
14 December
Sunday
+8°
+1°
15 December
Monday
+8°
+2°
16 December
Tuesday
+8°
+1°
17 December
Wednesday
+7°
+2°
18 December
Thursday
+6°
0°
19 December
Friday
+6°
0°
20 December
Saturday
+5°
−1°
21 December
Sunday
+7°
0°
22 December
Monday
+7°
+1°
23 December
Tuesday
+7°
0°
24 December
Wednesday
+6°
+1°
25 December
Thursday
+5°
−1°
26 December
Friday
+6°
0°
27 December
Saturday
+7°
0°
28 December
Sunday
+8°
+1°
29 December
Monday
+8°
+2°
30 December
Tuesday
+7°
+1°
31 December
Wednesday
+7°
+1°
Cities with similar weather in December
Austria
Vienna
Germany
Munich
Germany
Hamburg
Denmark
Copenhagen
Switzerland
Geneva
In December, the weather in Portsmouth is typically cold. Average daily high temperature in December is about 7 degrees above zero. On average, Portsmouth has 8 rainy, 8 partly cloudy, 7 sunny, 7 cloudy, and 1 snowy day in December. The rains are usually heavy. December as well as January, February, March, and June is considered the most uncomfortable time to visit Portsmouth.