September weather forecastCwmcarn, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Cwmcarn, United Kingdom, with an average temperature varying between 16.7°C (62.1°F) and 10.3°C (50.5°F).Temperature
Cwmcarn's shift into September is marked by a subtle change to a still enjoyable 16.7°C (62.1°F) from August's 18.4°C (65.1°F) in temperature. An average low-temperature of 10.3°C (50.5°F) is common in Cwmcarn during the nights of September.Humidity
In Cwmcarn, United Kingdom, the average relative humidity in September is 85%.Rainfall
In Cwmcarn, in September, it is raining for 14.8 days, with typically 33mm (1.3") of accumulated precipitation. Throughout the year, there are 192.5 rainfall days, and 549mm (21.61") of precipitation is accumulated.Snowfall
May through October are months without snowfall in Cwmcarn.Daylight
In September, the average length of the day in Cwmcarn is 12h and 38min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:52 pm BST.
Sunshine
The average sunshine in September in Cwmcarn is 7.1h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Undertake protective steps - Preventing sun damage is advised. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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
Average temperature in September
Cwmcarn, United Kingdom
- Average high temperature in September: 16.7°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 (6.8°C).
- Average low temperature in September: 10.3°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is February (2.9°C).
Average pressure in September
Cwmcarn, 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
Cwmcarn, United Kingdom
- Average wind speed in September: 15.2km/h
The windiest month (with the highest average wind speed) is February (21km/h).
The calmest months (with the lowest average wind speed) are June and July (14.2km/h).
Average humidity in September
Cwmcarn, 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 (83%).
Average rainfall in September
Cwmcarn, United Kingdom
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in September
Cwmcarn, United Kingdom
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is November (19 days).
The month with the least rainy days is February (13.8 days).
Average snowfall in September
Cwmcarn, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Cwmcarn, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2.5 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
Cwmcarn, 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 6min
The month with the most sunshine is July (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 3h and 48min).
Average sunshine days in September
Cwmcarn, United Kingdom
- Average sunshine days in September: 11.9 days
The month with the most sunshine days is April (12.9 days).
The month with the least sunshine days is November (7.9 days).
Average UV index in September
Cwmcarn, 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
Cwmcarn, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is November (Cloud cover 62).
The months with the least cloud cover are April and May (Cloud cover 48).
Average visibility in September
Cwmcarn, 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).
