Cardiff Weather in September
What's the weather like in Cardiff (Wales) in September 2024?
The climate in Cardiff during September can be summarized as mild and a little damp.
September is in the fall / autumn in Cardiff and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 18°C (64°F), whilst at night 10°C (51°F) is normal.
| Daytime temperature | 17.9°C 64.1°F |
|---|---|
| Nightly temperature | 10.4°C 50.6°F |
| Average temperature | 14.1°C 57.4°F |
| Daily sunshine | 5.2 hrs |
| Avg rainfall | 91 mm 3.6 ins |
| Rainy days | 15 days |
| Sea temperature | 16.1°C 60.9°F |
| Humidity | 86% |
| Windspeed | 16.2kph 10 mph |
On average September is the 5th wettest month of the year in Cardiff with around 91mm 3.6 inches of rain making it a a little damp time to visit. This rainfall is typically spread over 15 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.2 hours of sunshine per day.
September temperatures in Cardiff
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Cardiff in September 2024.
Other monthly averages
Best places to visit in September
Cardiff weather stats
| Hottest month: | July | 20.2°C 68.4°F |
|---|---|---|
| Driest month: | April | 60mm 2.4ins |
| Sunniest month: | August | 6.6hrs |
| Coldest month: | February | 7.2°C 45°F |
| Wettest month: | December | 109mm 4.3ins |
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