Wales (Cardiff)
December
Weather in Wales for December 2025
Your guide to Wales weather in December - trends and predictions
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So far, December 2025 in Wales is slightly warmer than the historical average by 0.8 °C.
Expect cooler weather in the next days in Wales with the forecast suggesting a temperature of 8.2 °C, lower than the historical average.
In general, the average temperature in Wales at the beginning of December is 10 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 8.7 °C by the end of December.
Wales experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 132.2 mm.
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Temperatures
Rain 🌧️
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5
Dry days
26
Rainy days
0
Snow days
10°/6°
Temperatures
34 km/h
Avg max wind
85 %
Avg humidity
Wales Weather December
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What’s the Weather Like in Wales This December?
Discover the average temperatures and weather trends across Wales’s cities this December.
Temperatures trend during December in Wales
See the weather trend as well as the moving average line
December weather in Wales day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Dec. |  Partly cloudy | 10° /5° | 9.9 mm | 3 | |
| 2 Dec. |  Cloudy | 8° /3° | 1.8 mm | 2 | |
| 3 Dec. |  Light rain shower | 8° /4° | 7.5 mm | 2 | |
| 4 Dec. | Light rain shower | 10° /4° | 5.9 mm | 2 | |
| 5 Dec. | Patchy rain possible | 11° /5° | 11.3 mm | 3 | |
| 6 Dec. | Patchy rain possible | 11° /5° | 6.1 mm | 3 | |
| 7 Dec. |  Light rain | 12° /7° | 11 mm | 3 | |
| 8 Dec. | Light rain shower | 9° /8° | 1.7 mm | 2 | |
| 9 Dec. |  Moderate rain | 11° /7° | 8.4 mm | 3 | |
| 10 Dec. | Patchy rain possible | 10° /6° | 3.9 mm | 3 | |
| 11 Dec. | Patchy rain possible | 9° /5° | 0.5 mm | 3 | |
| 12 Dec. | Patchy rain possible | 9° /5° | 3.7 mm | 3 | |
| 13 Dec. | Patchy rain possible | 8° /5° | 1.6 mm | 2 | |
| 14 Dec. | Partly cloudy | 11° /7° | 0 mm | 0.1 | |
| 15 Dec. | Moderate rain | 11° /10° | 10.1 mm | 0 | |
| 16 Dec. | Patchy rain possible | 9° /5° | 0.7 mm | 0.1 | |
| 17 Dec. | Partly cloudy | 9° /4° | 0 mm | 0.1 | |
| 18 Dec. | Moderate rain | 12° /8° | 7.3 mm | 0.1 | |
| 19 Dec. | Partly cloudy | 10° /6° | 0 mm | 3 | |
| 20 Dec. |  Sunny | 7° /4° | 0 mm | 3 | |
| 21 Dec. |  Overcast | 6° /4° | 0 mm | 1 | |
| 22 Dec. | Cloudy | 6° /4° | 0 mm | 1 | |
| 23 Dec. | Partly cloudy | 6° /3° | 0 mm | 2 | |
| 24 Dec. | Partly cloudy | 7° /4° | 0 mm | 3 | |
| 25 Dec. | Overcast | 10° /8° | 0.1 mm | 2 | |
| 26 Dec. | Sunny | 6° /3° | 0 mm | 2 | |
| 27 Dec. | Sunny | 5° /2° | 0 mm | 2 | |
| 28 Dec. |  Moderate or heavy rain shower | 10° /7° | 5.4 mm | 3 | |
| 29 Dec. | Moderate rain at times | 9° /6° | 4.1 mm | 2 | |
| 30 Dec. | Moderate or heavy rain shower | 11° /6° | 6 mm | 3 | |
| 31 Dec. |  Heavy rain at times | 10° /7° | 9.1 mm | 3 | |
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Important Notice
Our weather forecast for Wales in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Wales forecast closer to your planned date for the most up-to-date weather information.
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Wales in December - FAQ
What are the expected maximum and minimum temperatures in Wales during December?
During December, expect a variety of temperatures with highs around 10° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Wales during December?
Significant rainfall exceeding 132.2 mm is expected in Wales during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Wales during December?
The average wind speed in Wales during December is 34 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Wales
Explore the daily rainfall trends and prepare for Waless December weather 💧
Typically, Wales has 26 rainy days in December with a total of 132.2 mm of rainfall.
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