Weather in September
Temperature
With the onset of September, a modest change to a still enjoyable 17.4°C (63.3°F) from August's 19.3°C (66.7°F) is noted in high-temperature. During September, Llanfairpwllgwyngyll's temperature falls to a steady low-temperature average of 10.4°C (50.7°F).Rainfall
In September, the rain falls for 15.8 days. Throughout September, 98mm (3.86") of precipitation is accumulated. In Llanfairpwllgwyngyll, during the entire year, the rain falls for 202 days and collects up to 1102mm (43.39") of precipitation.Snowfall
In Llanfairpwllgwyngyll, snow does not fall in June through October.Sea temperature
In Llanfairpwllgwyngyll, in September, the average water temperature is 15.6°C (60.1°F).Note: Swimming in water at 15.6°C (60.1°F) is not a pleasurable experience for most. The task of managing breathing becomes more challenging as the water temperature descends from 21°C (69.8°F) to 15°C (59°F).
Daylight
The average length of the day in September in Llanfairpwllgwyngyll, United Kingdom, is 12h and 40min.On the first day of September in Llanfairpwllgwyngyll, sunrise is at 6:27 am and sunset at 8:05 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 6:55 pm BST.
Sunshine
In September, the average sunshine in Llanfairpwllgwyngyll, United Kingdom, is 4.2h.Frequently asked questions
What are the temperatures in Llanfairpwllgwyngyll in September?
How much does it rain in Llanfairpwllgwyngyll in September?
When it does not snow in Llanfairpwllgwyngyll?
How cold is the water in September in Llanfairpwllgwyngyll?
What is the average length of the day in September in Llanfairpwllgwyngyll?
When is the sunrise / sunset in September in Llanfairpwllgwyngyll?
How many hours of sunshine does Llanfairpwllgwyngyll have in September?
Average temperature in September
Llanfairpwllgwyngyll, United Kingdom
- Average high temperature in September: 17.4°C
The warmest month (with the highest average high temperature) is July (19.4°C).
The month with the lowest average high temperature is January (7.7°C).
- Average low temperature in September: 10.4°C
The months with the highest average low temperature are July and August (11.9°C).
The coldest month (with the lowest average low temperature) is February (2.2°C).
Average rainfall in September
Llanfairpwllgwyngyll, United Kingdom
- Average rainfall in September: 98mm
The wettest month (with the highest rainfall) is November (130mm).
The driest months (with the least rainfall) are April and May (65mm).
Average rainfall days in September
Llanfairpwllgwyngyll, United Kingdom
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is January (19.7 days).
The month with the least rainy days is July (13.1 days).
Average snowfall days in September
Llanfairpwllgwyngyll, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.1 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Llanfairpwllgwyngyll, United Kingdom
- Average sea temperature in September: 15.6°C
The best month for swimming (with the highest average sea temperature) is August (15.7°C).
The coldest month (with the lowest average sea temperature) is March (7.9°C).
Average daylight in September /
Average sunshine in September
Llanfairpwllgwyngyll, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 4h and 1min
The month with the most sunshine is May (Average sunshine: 6h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 18min).
Llanfairpwllgwyngyll, United Kingdom
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