Holyhead Weather in September
What's the weather like in Holyhead (Wales) in September 2025?
The climate in Holyhead during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Holyhead and is typically the 3rd warmest month of the year. Daytime maximum temperatures average around 17°C (62°F), whilst at night 11°C (52°F) is normal.
| Daytime temperature | 16.7°C 62.1°F |
|---|---|
| Nightly temperature | 10.9°C 51.6°F |
| Average temperature | 13.8°C 56.8°F |
| Daily sunshine | 5 hrs |
| Avg rainfall | 77 mm 3 ins |
| Rainy days | 16 days |
| Sea temperature | 15.1°C 59.2°F |
| Humidity | 85% |
| Windspeed | 21.6kph 14 mph |
On average September is the 5th wettest month of the year in Holyhead with around 77mm 3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 5 hours of sunshine per day.
September temperatures in Holyhead
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 Holyhead in September 2025.
Other monthly averages
Best places to visit in September
Holyhead weather stats
| Hottest month: | August | 18.4°C 65.1°F |
|---|---|---|
| Driest month: | May | 51mm 2ins |
| Sunniest month: | May | 7.7hrs |
| Coldest month: | February | 7.5°C 45.5°F |
| Wettest month: | November | 102mm 4ins |
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