Swansea Climate by Month
The weather in Swansea sees moderate temperature fluctuations over the course of a year.
Temperatures can be pleasant at the high end
to roughly cold at the low end.
It also has a notably wet climate with much precipitation.
Now, let’s explore all the climate details to give you a full picture.
Average day and night temperature
In Swansea, seasonal changes bring about a moderate variation in temperatures. Average daytime temperatures range from a pleasant 20°C in August, the warmest time of the year, to a chilly 9°C during cooler months like February. At night, temperatures typically average around 4°C during these months.
The mean minimum and maximum temperatures throughout the year
Precipitation and rainy days
Swansea experiences significant rainfall throughout the year, averaging 1334 mm of precipitation annually. While rainfall varies throughout the year, each season offers its own charm. December brings wetter days averaging 146 mm of precipitation, spread over 20 rainy days. In contrast, April experiences a drier climate, with about 83 mm of rainfall spread across 14 rainy days.The mean monthly precipitation over the year, including rain, hail and snow
The average number of days each month with precipitation
Sunshine over the year
Seasonal changes in sunshine hours are quite dramatic in Swansea. While July receives considerable daily sunshine with up to 6.7 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.6 hours of sunlight per day.Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Average humidity
The relative humidity is high throughout the year in Swansea.
Relative humidity over the year
The best time of year to visit Swansea in the United Kingdom
Other facts from our historical weather data:August has an average maximum temperature of 20°C and is the warmest month of the year.
The coldest month is February with an average maximum temperature of 9°C.
December tops the wettest month list with 146 mm of rainfall.
April is the driest month with 83 mm of precipitation.
July is the sunniest month with an average of 202 hours of sunshine.
No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.
