Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The advent of September brings an average high-temperature of a mild 15.5°C (59.9°F), exhibiting minor difference from the previous month. Nighttime temperature experiences an average drop to a chilly 8.7°C (47.7°F) in September.Humidity
In Llanhamlach, the average relative humidity in September is 89%.Rainfall
In Llanhamlach, in September, during 14.3 rainfall days, 41mm (1.61") of precipitation is typically accumulated. Throughout the year, there are 192.1 rainfall days, and 679mm (26.73") of precipitation is accumulated.Snowfall
June through October are months without snowfall.Daylight
In September, the average length of the day in Llanhamlach is 12h and 39min.On the first day of September, sunrise is at 6:26 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:52 pm BST.
Sunshine
The average sunshine in September is 5.4h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 3 turns into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Llanhamlach in September?
What is the average humidity in September in Llanhamlach?
How much does it rain in Llanhamlach in September?
When it does not snow in Llanhamlach?
How many hours of daylight does Llanhamlach have in September?
When is the sunrise / sunset in September in Llanhamlach?
How many hours of sunshine does Llanhamlach have in September?
What is the UV index reading in September in Llanhamlach?
Average temperature in September
Llanhamlach, 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 (5.7°C).
- Average low temperature in September: 8.7°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 (1.3°C).
Average pressure in September
Llanhamlach, 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
Llanhamlach, United Kingdom
- Average wind speed in September: 13.9km/h
The windiest month (with the highest average wind speed) is February (19.6km/h).
The calmest month (with the lowest average wind speed) is June (13.3km/h).
Average humidity in September
Llanhamlach, United Kingdom
- Average humidity in September: 89%
The months with the highest relative humidity are November and December (92%).
The month with the lowest relative humidity is April (84%).
Average rainfall in September
Llanhamlach, United Kingdom
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is December (79mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in September
Llanhamlach, United Kingdom
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (19.1 days).
The month with the least rainy days is February (12.5 days).
Average snowfall in September
Llanhamlach, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (41mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Llanhamlach, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.7 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
Llanhamlach, United Kingdom
- Average daylight in September: 12h and 4min
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 2min
The month with the most sunshine is May (Average sunshine: 6h and 30min).
The month with the least sunshine is November (Average sunshine: 2h and 54min).
Average sunshine days in September
Llanhamlach, United Kingdom
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is March (13.3 days).
The month with the least sunshine days is November (9 days).
Average UV index in September
Llanhamlach, 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
Llanhamlach, United Kingdom
- Average cloud cover in September: 64
The month with the most cloud cover is November (Cloud cover 73).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility in September
Llanhamlach, United Kingdom
- Average visibility in September: 7km
The months with the highest visibility are February and March (9km).
The month with the lowest visibility is September (7km).
