Wales weather in September
Thinking about venturing to Wales this September and curious about the weather conditions to expect? This page holds all the key information you seek, responding to your question:
What is the weather like in Wales in September?
Wales is a region in the United Kingdom. September in Wales generally has pleasant temperatures, with precipitation levels ranging from moderate to high. September is a summer month.
You can expect pleasant maximum daytime temperatures of around 18°C and nighttime temperatures around 12°C in Cardiff.
In September, precipitation varies across different areas. From moderate rainfall in Cardiff with an average of 90 mm to high rainfall in Swansea with 103 mm. Cardiff enjoys a balanced 149 hours of sunlight. Ensuring it's neither too overcast nor too sunny.
For a closer look at September's conditions in Wales, see the map below. For a more detailed look at Wales's yearly weather, check out our Wales climate page.
Where to go in Wales in September
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Popular destinations in Wales
What is the weather like in September for the 2 most popular destinations in Wales?
Average weather in Cardiff
In September Cardiff generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 12°C and moderate monthly rainfall. So on average the conditions are pleasant that month.
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Average weather in Swansea
In September Swansea generally has pleasant temperatures with maximum daytime temperatures around 18°C, minimum nighttime temperatures around 12°C and high monthly rainfall. So on average the conditions are tolerable that month.
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Is your destination not in the list? Have a look at other destinations in Wales, in the United Kingdom.
Is September the best time to visit Wales?
Given the typically pleasant weather conditions in Cardiff, September might be a good time to visit Wales. It's worth noting that weather conditions might differ depending on the location you visit.
On average, the best time to visit Wales is in July and August with generally perfect weather in Cardiff. On the other hand, the weather in January, February, November and December tend to be poor.
Interested in more climate information?
We have much more information about the climate in Wales.
Interested in the weather conditions in a specific month? Select the month below.
Weather and climate has detailed information for every country in the world. Are you going to the United Kingdom? Get detailed 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 climate conditions. Find out where to go with our weather planner.