Cardiff weather in September (Wales, United Kingdom)
Is Cardiff, the United Kingdom a good destination in September, weather-wise? Curious if the timing is right for your trip? Our page offers an in-depth look at the monthly weather conditions.
Temperatures
In September, Cardiff typically experiences pleasant temperatures and moderate rainfall. The summer season is characteristic of September. During the daylight hours, temperatures often reach 18°C. After dark they usually decrease to around 12°C.
Precipitation
Cardiff in September usually receives moderate rainfall, averaging around 90 mm for the month. Climate statistics over the past 30 years suggest around 16 days of rain.
Average sunshine
The month experiences a moderate amount of sunlight, with 149 hours of sunshine. This provides a nice balance between sunshine and clouds.
Average windspeed
In September, average wind speeds reach 4 m/s, leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.
Average water temperature in September
The water temperature is 15°C, not quite the ideal temperature for a leisurely swim but certainly doable for the more adventurous. Locals who are accustomed to these conditions might find it refreshing, while visitors often prefer to test the waters gradually.If your ideal day consists of dry skies and pleasant temperatures, July and August typically offer the best circumstances for Cardiff.
Select a Month of Interest
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United Kingdom, check out our Cardiff's climate page.
Cardiff, monthly averages in September
Min Temperature
12°C
Max Temperature
18°C
Water Temperature
15°C
Chance of Rain
52%
Precipitation
90 mm
Rainy days
16 days
Humidity
81%
Windspeed
4 m/s
Sunshine
149 hours
Percentage Sunshine
37%
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.
perfect weather
pleasant
tolerable
unpleasant
poor
Select a Month of Interest
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United Kingdom, check out our Cardiff's climate page.
So, what should you wear in this month?
For visitors traveling to Cardiff, 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. With a water temperature of around 15°C there is no need to bring your swimwear.What To Do
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Interested in more climate information?
This site provides you with all the information you need about the climate in Cardiff.
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.
