September weather forecastCefneithin, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Cefneithin, United Kingdom, with temperature in the range of an average low of 11.9°C (53.4°F) and an average high of 16.4°C (61.5°F).Temperature
September welcomes an average high-temperature of a still enjoyable 16.4°C (61.5°F), not much different from the preceding month. Cefneithin's nighttime temperature in September shows a minor descent, with a steady average of 11.9°C (53.4°F).Humidity
The average relative humidity in September is 84%.Rainfall
In Cefneithin, in September, during 17.5 rainfall days, 54mm (2.13") of precipitation is typically accumulated. Throughout the year, there are 219.6 rainfall days, and 745mm (29.33") of precipitation is accumulated.Snowfall
In Cefneithin, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:29 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:16 am and sunset at 6:55 pm BST.
Sunshine
The average sunshine in September in Cefneithin is 7h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Cefneithin. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum UV index of 4 during September translates into these guidelines:
Ensure safety - Sun damage prevention is strongly urged. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cefneithin, United Kingdom
- Average high temperature in September: 16.4°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is February (7.7°C).
- Average low temperature in September: 11.9°C
The month with the highest average low temperature is August (13.6°C).
The coldest month (with the lowest average low temperature) is February (4.5°C).
Average pressure in September
Cefneithin, United Kingdom
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is May (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in September
Cefneithin, United Kingdom
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is December (23.9km/h).
The calmest month (with the lowest average wind speed) is June (15.4km/h).
Average humidity in September
Cefneithin, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are January, August, October, November and December (85%).
The month with the lowest relative humidity is April (81%).
Average rainfall in September
Cefneithin, United Kingdom
- Average rainfall in September: 54mm
The wettest month (with the highest rainfall) is December (84mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in September
Cefneithin, United Kingdom
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is December (21.5 days).
The month with the least rainy days is April (15.1 days).
Average snowfall in September
Cefneithin, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Cefneithin, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.3 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
Cefneithin, 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: 7h and 0min
The months with the most sunshine are April and May (Average sunshine: 8h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Cefneithin, United Kingdom
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is May (12.8 days).
The month with the least sunshine days is August (6.5 days).
Average UV index in September
Cefneithin, 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, November and December (UV index 2).
Average cloud cover in September
Cefneithin, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility in September
Cefneithin, 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).
