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
September begins with an average high-temperature of a still refreshing 16.2°C (61.2°F), reflecting close similarity to the preceding month. Throughout the month of September, the nighttime temperature dips to an average of 9.6°C (49.3°F).Humidity
The average relative humidity in September is 86%.Rainfall
The month with the least rainfall is September, when the rain falls for 15.4 days and typically collects 34mm (1.34") of precipitation.Snowfall
In Llansantffraed, snow does not fall in June through October.Daylight
In September, the average length of the day is 12h and 39min.On the first day of September, sunrise is at 6:26 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:13 am and sunset at 6:52 pm BST.
Sunshine
In September, the average sunshine is 6.8h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: A typical high UV index of 3 in September suggests the following recommendations:
Adopt protective measures - It is advised to guard against sun damage. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow in Llansantffraed?
How many hours of daylight does Llansantffraed have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Llansantffraed, United Kingdom
- Average high temperature in September: 16.2°C
The warmest month (with the highest average high temperature) is July (18.4°C).
The month with the lowest average high temperature is January (6.2°C).
- Average low temperature in September: 9.6°C
The month with the highest average low temperature is August (11.6°C).
The coldest month (with the lowest average low temperature) is January (2.2°C).
Average pressure in September
Llansantffraed, United Kingdom
- Average pressure in September: 1016.6mbar
The months with the highest atmospheric pressure are May and September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed in September
Llansantffraed, United Kingdom
- Average wind speed in September: 14.4km/h
The windiest month (with the highest average wind speed) is February (20.2km/h).
The calmest month (with the lowest average wind speed) is June (13.5km/h).
Average humidity in September
Llansantffraed, United Kingdom
- Average humidity in September: 86%
The months with the highest relative humidity are November and December (90%).
The months with the lowest relative humidity are April and May (84%).
Average rainfall in September
Llansantffraed, United Kingdom
- Average rainfall in September: 34mm
The wettest month (with the highest rainfall) is November (75mm).
The driest month (with the least rainfall) is September (34mm).
Average rainfall days in September
Llansantffraed, United Kingdom
- Average rainfall days in September: 15.4 days
The months with the highest number of rainy days are July and November (19.1 days).
The month with the least rainy days is February (12.8 days).
Average snowfall in September
Llansantffraed, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (37mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Llansantffraed, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (3.9 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
Llansantffraed, 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: 6h and 5min
The month with the most sunshine is July (Average sunshine: 7h and 36min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days in September
Llansantffraed, United Kingdom
- Average sunshine days in September: 11.3 days
The months with the most sunshine days are March and April (12.3 days).
The month with the least sunshine days is November (7.3 days).
Average UV index in September
Llansantffraed, 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
Llansantffraed, United Kingdom
- Average cloud cover in September: 54
The month with the most cloud cover is November (Cloud cover 65).
The months with the least cloud cover are April and May (Cloud cover 51).
Average visibility in September
Llansantffraed, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June and December (9km).
The months with the lowest visibility are July, August, September, October and November (8km).
