Cardiff
December
Weather in Cardiff for December 2025
Your guide to Cardiff weather in December - trends and predictions
So far, December 2025 in Cardiff is slightly warmer than the historical average by 0.9 °C.
Expect cooler weather in the next days in Cardiff with the forecast suggesting a temperature of 8.6 °C, lower than the historical average.
In general, the average temperature in Cardiff at the beginning of December is 10 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 8.9 °C by the end of December.
Cardiff experiences heavy rainfall in December, with over 20 rainy days and an average total precipitation 132.2 mm.
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Temperatures
Rain 🌧️
More
5
Dry days
26
Rainy days
0
Snow days
10°/6°
Temperatures
34 km/h
Avg max wind
85 %
Avg humidity
Cardiff Weather December
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Temperatures trend during December in Cardiff
See the weather trend as well as the moving average line
December weather in Cardiff 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. | Patchy rain possible | 10° /4° | 0.1 mm | 3 | |
| 15 Dec. | Cloudy | 10° /7° | 0.1 mm | 3 | |
| 16 Dec. | Moderate rain | 9° /5° | 6.5 mm | 0.1 | |
| 17 Dec. | Patchy rain possible | 9° /4° | 1.7 mm | 0.1 | |
| 18 Dec. | Moderate rain | 11° /8° | 7.6 mm | 0 | |
| 19 Dec. | Patchy rain possible | 9° /6° | 0.5 mm | 0.1 | |
| 20 Dec. | Partly cloudy | 7° /5° | 0 mm | 3 | |
| 21 Dec. | Patchy rain possible | 8° /5° | 3.6 mm | 2 | |
| 22 Dec. | Patchy rain possible | 9° /8° | 1.2 mm | 2 | |
| 23 Dec. | Patchy rain possible | 9° /7° | 0.5 mm | 2 | |
| 24 Dec. | Patchy rain possible | 9° /7° | 3.3 mm | 2 | |
| 25 Dec. | Partly cloudy | 9° /6° | 0 mm | 3 | |
| 26 Dec. |  Overcast | 9° /6° | 0 mm | 2 | |
| 27 Dec. | Patchy rain possible | 8° /5° | 0.2 mm | 2 | |
| 28 Dec. | Patchy rain possible | 6° /4° | 0.1 mm | 1 | |
| 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 Cardiff 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 Cardiff forecast closer to your planned date for the most up-to-date weather information.
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Cardiff in December - FAQ
What are the expected maximum and minimum temperatures in Cardiff 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 Cardiff during December?
Significant rainfall exceeding 132.2 mm is expected in Cardiff during December, occurring over more than 26 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cardiff during December?
The average wind speed in Cardiff during December is 34 km/h, suggesting breezy to windy conditions, depending on your activities.
December rainfall patterns in Cardiff
Explore the daily rainfall trends and prepare for Cardiffs December weather 💧
Typically, Cardiff has 26 rainy days in December with a total of 132.2 mm of rainfall.
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