September weather forecastLlysfaen, United Kingdom
September weather for Llysfaen, United Kingdom: The first month of the autumn, September, is still a mild month in Llysfaen, United Kingdom, with temperature in the range of an average high of 15.3°C (59.5°F) and an average low of 11.5°C (52.7°F). On the first day of September in Llysfaen, United Kingdom, sunrise is at 6:25 am and sunset at 8:03 pm.
September
Weather in September
The first month of the autumn, September, is still a mild month in Llysfaen, United Kingdom, with temperature in the range of an average high of 15.3°C (59.5°F) and an average low of 11.5°C (52.7°F).Temperature
The shift into September finds Llysfaen, United Kingdom, at an average high-temperature of a still refreshing 15.3°C (59.5°F), closely comparable to August's conditions. Llysfaen's average temperature during the nights of September is recorded at a fresh 11.5°C (52.7°F).Humidity
In Llysfaen, the average relative humidity in September is 84%.Rainfall
In Llysfaen, in September, it is raining for 17.9 days, with typically 45mm (1.77") of accumulated precipitation. In Llysfaen, during the entire year, the rain falls for 228.5 days and collects up to 604mm (23.78") of precipitation.Snowfall
In Llysfaen, snow does not fall in May through October.Daylight
In September, the average length of the day in Llysfaen is 12h and 41min.On the first day of September in Llysfaen, United Kingdom, sunrise is at 6:25 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 6:53 pm BST.
Sunshine
The average sunshine in September in Llysfaen, United Kingdom, is 6.5h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Llysfaen, United Kingdom. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take precautions - Protection against skin and eye damage is obliged. To guard against the harmful effects of the Sun, minimize exposure during midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Llysfaen, United Kingdom
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure in September
Llysfaen, United Kingdom
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.8mbar).
Average wind speed in September
Llysfaen, United Kingdom
- Average wind speed in September: 17.9km/h
The windiest month (with the highest average wind speed) is December (23.8km/h).
The calmest month (with the lowest average wind speed) is June (14.4km/h).
Average humidity in September
Llysfaen, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are January and August (85%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Llysfaen, United Kingdom
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is May (31mm).
Average rainfall days in September
Llysfaen, United Kingdom
- Average rainfall days in September: 17.9 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is February (15.8 days).
Average snowfall in September
Llysfaen, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Llysfaen, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Llysfaen, United Kingdom
- Average daylight in September: 12h and 42min
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: 6h and 30min
The months with the most sunshine are May and June (Average sunshine: 7h and 42min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days in September
Llysfaen, United Kingdom
- Average sunshine days in September: 8.5 days
The months with the most sunshine days are March and May (11 days).
The month with the least sunshine days is November (5.2 days).
Average UV index in September
Llysfaen, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Llysfaen, United Kingdom
- Average cloud cover in September: 55
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 49).
Average visibility in September
Llysfaen, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, September and October (10km).
The months with the lowest visibility are January, February, April, May, June, July, August, November and December (9km).
