September weather forecastLlanfaethlu, United Kingdom
September
Weather in September
September, the first month of the autumn in Llanfaethlu, is still a refreshing month, with an average temperature ranging between min 13.5°C (56.3°F) and max 15.5°C (59.9°F).Temperature
In Llanfaethlu, September's average high-temperature stands at a moderate 15.5°C (59.9°F), closely related to the preceding month. Llanfaethlu maintains an average low-temperature of 13.5°C (56.3°F) throughout September's nights.Humidity
In Llanfaethlu, the average relative humidity in September is 81%.Rainfall
In September, in Llanfaethlu, the rain falls for 19.5 days. Throughout September, 61mm (2.4") of precipitation is accumulated. Throughout the year, there are 233.6 rainfall days, and 739mm (29.09") of precipitation is accumulated.Snowfall
In Llanfaethlu, United Kingdom, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 41min.On the first day of the month, sunrise is at 6:28 am and sunset at 8:07 pm. On the last day of September, in Llanfaethlu, United Kingdom, sunrise is at 7:18 am and sunset at 6:56 pm BST.
Sunshine
The average sunshine in September is 6.8h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the UV index of 4 transforms into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Llanfaethlu, United Kingdom
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is August (16.6°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in September: 13.5°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in September
Llanfaethlu, United Kingdom
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.7mbar).
Average wind speed in September
Llanfaethlu, United Kingdom
- Average wind speed in September: 23.5km/h
The windiest month (with the highest average wind speed) is December (31.3km/h).
The calmest month (with the lowest average wind speed) is June (18.7km/h).
Average humidity in September
Llanfaethlu, United Kingdom
- Average humidity in September: 81%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is November (79%).
Average rainfall in September
Llanfaethlu, United Kingdom
- Average rainfall in September: 61mm
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is May (36mm).
Average rainfall days in September
Llanfaethlu, United Kingdom
- Average rainfall days in September: 19.5 days
The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is April (15.6 days).
Average snowfall in September
Llanfaethlu, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are January and December (4mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Llanfaethlu, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Llanfaethlu, 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 48min
The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Llanfaethlu, United Kingdom
- Average sunshine days in September: 8.1 days
The month with the most sunshine days is May (12.3 days).
The month with the least sunshine days is December (4.3 days).
Average UV index in September
Llanfaethlu, 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 and December (UV index 2).
Average cloud cover in September
Llanfaethlu, United Kingdom
- Average cloud cover in September: 53
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 46).
Average visibility in September
Llanfaethlu, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
