Average temperatures, rainfall and packing tips for Cardiff, United Kingdom in December
December in Cardiff is typically cool, with average daytime highs around 10°C and nights near 6°C. It is one of the cooler months of Cardiff's year.
December is one of the wetter months in Cardiff, with around 99 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Cardiff are usually June, July and August.
← Cardiff weather tomorrow (live)
In December, Cardiff averages a daytime high of about 10°C and a night-time low of around 6°C, based on recent historical data.
December is one of the wetter months in Cardiff, with around 99 mm of rain - plan around showers.
December is a workable time to visit Cardiff, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in Cardiff are usually June, July and August.