Average data for 10 years
1 December
Sunday
+6°
+4°
2 December
Monday
+8°
+5°
3 December
Tuesday
+6°
+5°
4 December
Wednesday
+7°
+4°
5 December
Thursday
+6°
+6°
6 December
Friday
+4°
+3°
7 December
Saturday
+2°
+1°
8 December
Sunday
+3°
0°
9 December
Monday
+4°
+2°
10 December
Tuesday
+4°
+2°
11 December
Wednesday
+4°
+1°
12 December
Thursday
+3°
+2°
13 December
Friday
+1°
0°
14 December
Saturday
+4°
0°
15 December
Sunday
+2°
+2°
16 December
Monday
0°
−1°
17 December
Tuesday
+1°
−2°
18 December
Wednesday
+4°
0°
19 December
Thursday
0°
+1°
20 December
today
+2°
−2°
21 December
tomorrow
+3°
+2°
22 December
Sunday
+2°
+1°
23 December
Monday
+2°
0°
24 December
Tuesday
+3°
+1°
25 December
Wednesday
+2°
+2°
26 December
Thursday
+3°
0°
27 December
Friday
+3°
+2°
28 December
Saturday
+1°
−1°
29 December
Sunday
0°
−3°
30 December
Monday
+3°
−3°
31 December
Tuesday
+3°
−3°
Cities near you
United States
Boston
United States
Islandia
Canada
Montreal
United States
Jamaica
United States
Colchester
Cities with similar weather in December
Finland
Helsinki
Latvia
Riga
Estonia
Tallinn
Sweden
Stockholm
Norway
Oslo
In December, the weather in Portsmouth is typically cold. Average daily high temperature in December is about 3 degrees above zero. On average, Portsmouth has 11 rainy, 9 sunny, 9 partly cloudy, and 2 cloudy days in December. The rains are usually heavy. December as well as February and March is considered the most uncomfortable time to visit Portsmouth.