Weather in Cardiff in December 2024
- December is usually the wettest month of the year in Cardiff;
Average weather
Average temperature in Cardiff in December
Going from a maximum of +13°C during the day to a minimum of -3°C during the night, the temperature in December averages around +10°C.
The average maximum temperature goes up 38% by the end of the month, compared with the beginning of the month, from +4°C to +10°C.
Is Cardiff warm or cold in December?
Cardiff is typically cool in December.
Maximum temperatures go down compared to the previous month from +11°C to +9°C. The minimum temperature also goes down from +6°C to +4°C.
Pack a sweater and a jacket as there will be cooler temperatures.
December is one of the coolest months in Cardiff, here is the comparison with other months:
Water temperature in Cardiff in December
Water in Cardiff in December is Cold. It varies from +10°C to +13°C, with an average of +11°C. Note that the air temperature is lower than the water temperature, averaging around +9°C.
In December, water temperatures are average relative to the rest of the year:
Can you swim in Cardiff in December?
Climate in Cardiff in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +11°C | +9°C | +8°C | ||||
| Min. temperature | ||||||
| -7°C | -7°C | -9°C | ||||
| Max. temperature | ||||||
| +17°C | +16°C | +14°C | ||||
| Rainfall | ||||||
| 103 mm | 108 mm | 89 mm | ||||
| Wind | ||||||
| 5 m/s | 5 m/s | 5 m/s | ||||
| Avg. water temperature | ||||||
| +14°C | +11°C | +9°C | ||||
| Humidity | ||||||
| 84% | 85% | 85% | ||||
| Air pressure | ||||||
| 1012 HPa | 1013 HPa | 1014 HPa | ||||
| Sunny days | ||||||
| 2 | 2 | 2 | ||||
| Cloudy days | ||||||
| 8 | 9 | 9 | ||||
| Rainy days | ||||||
| 19 | 18 | 18 | ||||
| Snowy days | ||||||
| 0 | 1 | 2 | ||||
December weather is still as ok as in November. It’s getting colder in December. From +11°C in the day, the average maximum temperature lowers to +9°C. Prepare for more rain. Average rainfall goes from 103 mm to 108 mm. Humidity rises from 84% to 85%. The average wind speed doesn’t change much during December, staying around 5 m/s. The amount of sunny days stay about the same, averaging 2 sunny days during the month.
Next month (January) brings a further decline in the weather.
Wind
The average wind speed is 5 m/s getting up to 10 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Cardiff is gradually increasing during December, going from 3 m/s to 8 m/s over the course of the month.
Rain
How was the weather last December in Cardiff?
Climate Change over Years
The climate in Cardiff in December has not changed much over the last 43 years.
The average temperature was the lowest in 1979 (+12°C) and the highest in 2022 (+16°C). The driest year was 2010 with only 736 mm of rainfall, and the wettest year was 2022 with 1906 mm.
FAQ
Is December a good time to visit Cardiff?
Can you sunbathe in Cardiff in December?
Can you swim in Cardiff in December?
Is Cardiff rainy in December?
Is it sunny in Cardiff in December?
Other cities in United Kingdom
Monthly weather in Cardiff
Source of the data
For this page, we’ve looked at the typical weather in Cardiff, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.