Weather in September
Sea temperature
In Sennen, United Kingdom, in September, the average water temperature is 16.5°C (61.7°F).Note: Swimming is not an enjoyable activity for the majority when the water is at 16.5°C (61.7°F). The difficulty of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
In Sennen, United Kingdom, the average length of the day in September is 12h and 37min.On the first day of the month, sunrise is at 6:38 am and sunset at 8:06 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:03 pm BST.
Frequently asked questions
How cold is the water in September in Sennen?
In Sennen, in September, the average water temperature is 16.5°C (61.7°F). For most, swimming in 16.5°C (61.7°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).
What is the average length of the day in September in Sennen?
In September, the average day length in Sennen, United Kingdom, is 12h and 37min.
What time are sunrise and sunset in September in Sennen?
In September, on the first day of the month, sunrise is at 6:38 am and sunset at 8:06 pm. On the last day of the month, in Sennen, sunrise is at 7:22 am and sunset at 7:03 pm BST.
Average sea temperature in September
Sennen, United Kingdom
- Average sea temperature in September: 16.5°C
The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (9.7°C).
Average daylight in September
Sennen, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 18min).
The month with the shortest days is December (Average daylight: 8h and 12min).
Sennen, United Kingdom
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