Cardiff
December
Weather in Cardiff for December 2026
Your guide to Cardiff weather in December - trends and predictions
In general, the average temperature in Cardiff at the beginning of December is 9.5 °C. As the month progressed, temperatures tended to moderately fall, reaching an average of 8.7 °C by the end of December.
Cardiff in December brings notable rainfall, with an average of 18 rainy days and a total precipitation of 163.8 mm.
Is December a good time to visit Cardiff? check out the best time to travel to Cardiff page.
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Temperatures
Rain 🌧️
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13
Dry days
18
Rainy days
0
Snow days
9°/6°
Temperatures
33 km/h
Avg max wind
86 %
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. |  Light rain | 10° /6° | 9.9 mm | 0.6 | |
| 2 Dec. |  Patchy rain possible | 7° /4° | 1.8 mm | 0.6 | |
| 3 Dec. | Light rain | 8° /5° | 7.5 mm | 0.6 | |
| 4 Dec. | Light rain | 10° /4° | 5.9 mm | 0.6 | |
| 5 Dec. |  Moderate rain | 10° /6° | 11.3 mm | 0.5 | |
| 6 Dec. | Light rain | 10° /6° | 6.1 mm | 0.5 | |
| 7 Dec. | Moderate rain | 12° /7° | 11 mm | 0.5 | |
| 8 Dec. | Light rain shower | 9° /8° | 1.7 mm | 0.5 | |
| 9 Dec. | Moderate rain | 11° /8° | 8.4 mm | 0.5 | |
| 10 Dec. | Light rain | 9° /7° | 3.9 mm | 0.5 | |
| 11 Dec. | Patchy rain possible | 9° /6° | 0.5 mm | 0.5 | |
| 12 Dec. | Light rain | 9° /5° | 3.7 mm | 0.5 | |
| 13 Dec. | Patchy rain possible | 8° /5° | 1.6 mm | 0.5 | |
| 14 Dec. | Patchy rain possible | 9° /4° | 0.1 mm | 0.5 | |
| 15 Dec. | Moderate rain | 10° /7° | 16.6 mm | 0.5 | |
| 16 Dec. | Patchy rain possible | 10° /6° | 1.2 mm | 0.5 | |
| 17 Dec. | Light rain | 10° /6° | 8.8 mm | 0.5 | |
| 18 Dec. | Moderate rain | 12° /7° | 15.6 mm | 0.5 | |
| 19 Dec. | Light rain | 9° /5° | 2.9 mm | 0.5 | |
| 20 Dec. | Light rain | 9° /5° | 5.1 mm | 0.5 | |
| 21 Dec. | Light rain | 10° /7° | 3.7 mm | 0.5 | |
| 22 Dec. | Patchy rain possible | 10° /7° | 2 mm | 0.5 | |
| 23 Dec. | Light rain | 10° /6° | 3.8 mm | 0.5 | |
| 24 Dec. | Patchy rain possible | 10° /7° | 2.3 mm | 0.5 | |
| 25 Dec. | Patchy rain possible | 9° /6° | 2.3 mm | 0.5 | |
| 26 Dec. | Light rain | 7° /4° | 2.7 mm | 0.5 | |
| 27 Dec. | Light rain | 10° /6° | 4.8 mm | 0.5 | |
| 28 Dec. | Light rain | 9° /6° | 4.1 mm | 0.5 | |
| 29 Dec. | Light rain | 8° /5° | 3.1 mm | 0.5 | |
| 30 Dec. | Light rain | 10° /5° | 4.5 mm | 0.5 | |
| 31 Dec. |  Heavy rain at times | 9° /6° | 6.8 mm | 0.5 | |
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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 9° and lows near 6°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cardiff during December?
Significant rainfall exceeding 163.8 mm is expected in Cardiff during December, occurring over more than 18 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Cardiff in December 2026?
Cardiff typically sees 0 cm of snowfall during December.
What are the typical wind conditions in Cardiff during December?
The average wind speed in Cardiff during December is 33 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 18 rainy days in December with a total of 163.8 mm of rainfall.
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