Swansea weather in September (Wales, United Kingdom)

Will it be rainy or sunny in Swansea this September? Discover if this is the best time for your journey with our detailed monthly weather breakdown.

Temperatures

The typical weather for September in Swansea includes pleasant temperatures and high rainfall. September marks the summer season. Throughout the day, temperatures can rise to about 18°C. At night, they generally drop to 12°C.

Precipitation

Swansea in September usually receives high rainfall, averaging around 103 mm for the month. Past climate data indicates that roughly 16 days will see rain.

Average sunshine

The city usually sees around 149 hours of sunlight, indicating a moderately sunny period.

Should you favor a climate that's both dry and comfortably warm July typically offers the most agreeable circumstances. On the other hand, January, February, November and December tend to be characterized by conditions that may not be as optimal.

For an in-depth look at the yearly conditions, visit our specialized Swansea climate page with graphs.

 

Swansea, monthly averages in September

Min Temperature 12°C  

Max Temperature 18°C  

Chance of Rain 53%  

Precipitation 103 mm  

Rainy days 16 days  

Humidity 81% *  

Sunshine 149 hours *  

Percentage Sunshine 37% *  

Data from: Cardiff, the United Kingdom (48 KM, 29 Miles).

Where to go in the United Kingdom in September

Find out more about the weather in the United Kingdom and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

For visitors traveling to Swansea, we recommend wearing layers. So maybe a skirt, t-shirt, shorts for during the day and jeans and a warm jacket for some days and evenings. Bring a rain jacket in case it rains during your stay. Plan on layering your clothes.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

6/10

Cycling

9/10

Walking

9/10

Camping

6/10

Outdoor sports

9/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Swansea.

Our site offers climate and forecast data for every country in the world. Are you going to the United Kingdom? On this website you can find historical weather averages for many cities in the United Kingdom. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.