Average temperatures, rainfall and packing tips for Swansea, United Kingdom in December
December in Swansea is typically cool, with average daytime highs around 10°C and nights near 6°C. It is one of the cooler months of Swansea's year.
December is one of the wetter months in Swansea, with around 137 mm of rain - plan around showers.
If your dates are flexible, the most comfortable months in Swansea are usually July and August.
← Swansea weather tomorrow (live)
In December, Swansea 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 Swansea, with around 137 mm of rain - plan around showers.
December is a workable time to visit Swansea, with cool days - just pack accordingly. If your dates are flexible, the most comfortable months in Swansea are usually July and August.