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
Weather in September
Temperature
The start of September marks an average high-temperature of a still refreshing 16.6°C (61.9°F), hardly distinguishable from the conditions in August. In September, Trehafod records an average nighttime temperature of 10.4°C (50.7°F).Humidity
In Trehafod, the average relative humidity in September is 85%.Rainfall
In September, in Trehafod, the rain falls for 10.1 days. Throughout September, 18mm (0.71") of precipitation is accumulated. Throughout the year, in Trehafod, there are 150.3 rainfall days, and 270mm (10.63") of precipitation is accumulated.Snowfall
In Trehafod, snow does not fall in May through October.Daylight
In September, the average length of the day in Trehafod, United Kingdom, is 12h and 38min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:59 pm. On the last day of September, in Trehafod, sunrise is at 7:13 am and sunset at 6:53 pm BST.
Sunshine
In Trehafod, United Kingdom, the average sunshine in September is 6.8h.UV index
The months with the highest UV index in Trehafod are May through September, with an average maximum UV index of 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Act with care - The need to guard against sun damage is communicated. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Trehafod?
What is the average humidity in September in Trehafod?
How many days does it rain in September in Trehafod?
When it does not snow in Trehafod?
How many hours of daylight does Trehafod have in September?
When is the sunrise / sunset in September in Trehafod?
How long on average sun shines in September in Trehafod?
What are the months with the highest UV index in Trehafod?
How high is the UV index in September in Trehafod?
Average temperature in September
Trehafod, United Kingdom
- Average high temperature in September: 16.6°C
The warmest month (with the highest average high temperature) is July (18.8°C).
The month with the lowest average high temperature is January (7°C).
- Average low temperature in September: 10.4°C
The month with the highest average low temperature is August (12.2°C).
The coldest month (with the lowest average low temperature) is January (3.1°C).
Average pressure in September
Trehafod, United Kingdom
- Average pressure in September: 1016.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in September
Trehafod, United Kingdom
- Average wind speed in September: 15.4km/h
The windiest month (with the highest average wind speed) is February (21.3km/h).
The calmest month (with the lowest average wind speed) is June (14.4km/h).
Average humidity in September
Trehafod, United Kingdom
- Average humidity in September: 85%
The months with the highest relative humidity are November and December (88%).
The months with the lowest relative humidity are April and May (82%).
Average rainfall in September
Trehafod, United Kingdom
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is November (35mm).
The driest month (with the least rainfall) is May (11mm).
Average rainfall days in September
Trehafod, United Kingdom
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is November (15.4 days).
The month with the least rainy days is April (9.5 days).
Average snowfall in September
Trehafod, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (6mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Trehafod, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.3 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
Trehafod, 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 May (Average sunshine: 7h and 54min).
The month with the least sunshine is November (Average sunshine: 3h and 42min).
Average sunshine days in September
Trehafod, United Kingdom
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is April (16.8 days).
The month with the least sunshine days is November (10.7 days).
Average UV index in September
Trehafod, 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
Trehafod, United Kingdom
- Average cloud cover in September: 53
The month with the most cloud cover is November (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 49).
Average visibility in September
Trehafod, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Trehafod, United Kingdom
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