Average data for 10 years
1 December
Sunday
+17°
+14°
2 December
Monday
+16°
+13°
3 December
Tuesday
+16°
+12°
4 December
Wednesday
+14°
+11°
5 December
Thursday
+15°
+13°
6 December
Friday
+15°
+13°
7 December
Saturday
+17°
+15°
8 December
Sunday
+18°
+14°
9 December
Monday
+16°
+13°
10 December
Tuesday
+16°
+12°
11 December
Wednesday
+16°
+13°
12 December
Thursday
+18°
+15°
13 December
Friday
+19°
+14°
14 December
Saturday
+17°
+14°
15 December
Sunday
+19°
+15°
16 December
Monday
+17°
+14°
17 December
Tuesday
+16°
+13°
18 December
Wednesday
+19°
+15°
19 December
Thursday
+19°
+14°
20 December
Friday
+17°
+13°
21 December
Saturday
+18°
+15°
22 December
Sunday
+19°
+15°
23 December
Monday
+19°
+15°
24 December
Tuesday
+19°
+15°
25 December
Wednesday
+17°
+14°
26 December
Thursday
+19°
+15°
27 December
Friday
+20°
+16°
28 December
Saturday
+19°
+14°
29 December
Sunday
+18°
+15°
30 December
Monday
+22°
+17°
31 December
Tuesday
+22°
+17°
In December, the weather in Swansea is typically warm. Average daily high temperature in December is about 18 degrees above zero. On average, Swansea has 13 partly cloudy, 7 sunny, 7 cloudy, and 4 rainy days in December. The rains are usually light.