Swansea weather in December
Long-run climate averages for Swansea, Wales in December, plus what the forecast models say for the days ahead.
In December, Swansea averages 10°C by day and 6°C at night. The wettest month is usually March.
December in Swansea averages a daytime high of 10°C and an overnight low of 6°C, which reads as cool for this part of the world. It is among the three coldest months of the year here. Across the whole year Swansea sees roughly 1786 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Swansea forecast with every model compared and how much they currently agree.
Swansea weather by month
what to expect in Swansea through the yearHere is Swansea's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Swansea by season.