September weather forecastLlandeilo, United Kingdom
September weather for Llandeilo, United Kingdom: September, the first month of the autumn in Llandeilo, is still a mild month, with temperature in the range of an average low of 8.8°C (47.8°F) and an average high of 15.5°C (59.9°F). In Llandeilo, during September, the rain falls for 10.7 days and regularly aggregates up to 23mm (0.91") of precipitation.
September
Weather in September
September, the first month of the autumn in Llandeilo, is still a mild month, with temperature in the range of an average low of 8.8°C (47.8°F) and an average high of 15.5°C (59.9°F).Temperature
Llandeilo, United Kingdom, experiences a transition to a still refreshing 15.5°C (59.9°F) in average high-temperatures with the arrival of September, not greatly differing from August's 17.1°C (62.8°F). Llandeilo's average low-temperature is measured at a chilly 8.8°C (47.8°F) during September.Humidity
In Llandeilo, the average relative humidity in September is 89%.Rainfall
September is the month with the least rainfall in Llandeilo. Rain falls for 10.7 days and accumulates 23mm (0.91") of precipitation.Snowfall
In Llandeilo, snow does not fall in May through October.Daylight
In September, the average length of the day in Llandeilo is 12h and 39min.On the first day of September, sunrise is at 6:28 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:55 pm BST.
Sunshine
In September, the average sunshine in Llandeilo is 5.6h.UV index
In Llandeilo, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 3 turns into the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Llandeilo, United Kingdom
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 8.8°C
The month with the highest average low temperature is August (10.8°C).
The coldest month (with the lowest average low temperature) is February (1.5°C).
Average pressure in September
Llandeilo, United Kingdom
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is May (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in September
Llandeilo, United Kingdom
- Average wind speed in September: 13.7km/h
The windiest month (with the highest average wind speed) is February (19km/h).
The calmest months (with the lowest average wind speed) are June and July (13km/h).
Average humidity in September
Llandeilo, United Kingdom
- Average humidity in September: 89%
The month with the highest relative humidity is December (92%).
The months with the lowest relative humidity are April and May (84%).
Average rainfall in September
Llandeilo, United Kingdom
- Average rainfall in September: 23mm
The wettest months (with the highest rainfall) are June and November (45mm).
The driest month (with the least rainfall) is September (23mm).
Average rainfall days in September
Llandeilo, United Kingdom
- Average rainfall days in September: 10.7 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is February (10.4 days).
Average snowfall in September
Llandeilo, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is November (35mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Llandeilo, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Llandeilo, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 5h and 36min
The months with the most sunshine are April and May (Average sunshine: 6h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).
Average sunshine days in September
Llandeilo, United Kingdom
- Average sunshine days in September: 16.3 days
The month with the most sunshine days is September (16.3 days).
The month with the least sunshine days is June (10.7 days).
Average UV index in September
Llandeilo, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (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
Llandeilo, United Kingdom
- Average cloud cover in September: 63
The month with the most cloud cover is November (Cloud cover 71).
The month with the least cloud cover is April (Cloud cover 57).
Average visibility in September
Llandeilo, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are February and March (9km).
The month with the lowest visibility is August (7km).
