Weather in City and County of Swansea for December 2025
Until now, December 2025 in City and County of Swansea has been nearly identical to the historical average, with a temperature of 10.6 °C (showing only a slight deviation of 0.4 °C).
The forecast for the next days in City and County of Swansea predicts temperatures to be around 7 °C, close to the historical average.
In general, the average temperature in City and County of Swansea at the beginning of December is 10.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 5.9 °C by the end of December.
City and County of Swansea experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 185.5 mm.
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City and County of Swansea Weather December
Temperatures trend during December in City and County of Swansea
December weather in City and County of Swansea day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Light rain shower | 10° /6° | 9 mm | 3 | |
| 2 Dec. | Light rain shower | 8° /5° | 4 mm | 2 | |
| 3 Dec. | Light rain shower | 9° /6° | 9.4 mm | 2 | |
| 4 Dec. | Light rain shower | 10° /6° | 6.9 mm | 3 | |
| 5 Dec. | Light rain shower | 11° /7° | 11.2 mm | 3 | |
| 6 Dec. |  Light drizzle | 11° /7° | 6.6 mm | 3 | |
| 7 Dec. | Light rain shower | 12° /8° | 17.9 mm | 3 | |
| 8 Dec. | Light rain shower | 10° /8° | 4.2 mm | 3 | |
| 9 Dec. |  Moderate rain | 11° /8° | 10 mm | 3 | |
| 10 Dec. | Moderate rain | 10° /7° | 4.5 mm | 3 | |
| 11 Dec. | Patchy rain possible | 9° /6° | 0.8 mm | 3 | |
| 12 Dec. | Patchy rain possible | 10° /6° | 6.7 mm | 3 | |
| 13 Dec. | Patchy rain possible | 9° /6° | 1.6 mm | 2 | |
| 14 Dec. | Light drizzle | 10° /6° | 0.8 mm | 2 | |
| 15 Dec. | Patchy rain possible | 11° /8° | 11.8 mm | 3 | |
| 16 Dec. | Patchy rain possible | 10° /7° | 0.9 mm | 3 | |
| 17 Dec. | Patchy rain possible | 11° /7° | 8.5 mm | 3 | |
| 18 Dec. | Light rain | 11° /8° | 17.8 mm | 3 | |
| 19 Dec. | Patchy rain possible | 9° /6° | 7.1 mm | 2 | |
| 20 Dec. | Patchy rain possible | 9° /7° | 4 mm | 0.1 | |
| 21 Dec. | Patchy rain possible | 8° /6° | 2.9 mm | 0 | |
| 22 Dec. | Patchy rain possible | 8° /6° | 0.7 mm | 0 | |
| 23 Dec. |  Sunny | 8° /5° | 0 mm | 0 | |
| 24 Dec. |  Overcast | 7° /4° | 0 mm | 0 | |
| 25 Dec. | Sunny | 5° /2° | 0 mm | 2 | |
| 26 Dec. | Overcast | 5° /1° | 0 mm | 1 | |
| 27 Dec. |  Partly cloudy | 6° /5° | 0 mm | 3 | |
| 28 Dec. | Overcast | 7° /3° | 0 mm | 2 | |
| 29 Dec. | Sunny | 5° /2° | 0 mm | 2 | |
| 30 Dec. |  Cloudy | 7° /3° | 0 mm | 1 | |
| 31 Dec. | Partly cloudy | 6° /3° | 0 mm | 2 | |
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City and County of Swansea in December - FAQ
December rainfall patterns in City and County of Swansea
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