September weather forecastRunham, United Kingdom
September
Weather in September
September, the first month of the autumn in Runham, is still a comfortable month, with an average temperature fluctuating between 13.7°C (56.7°F) and 17.4°C (63.3°F).Temperature
Transitioning from August to September, Runham observes an average high-temperature of a still comfortable 17.4°C (63.3°F), differing subtly from the previous month. Runham, during the September nights, maintains an average temperature of 13.7°C (56.7°F), closely aligned with its daytime readings.Humidity
In September, the average relative humidity in Runham is 78%.Rainfall
In September, the rain falls for 12.9 days. Throughout September, 25mm (0.98") of precipitation is accumulated. In Runham, during the entire year, the rain falls for 174.3 days and collects up to 337mm (13.27") of precipitation.Snowfall
April through October are months without snowfall in Runham.Daylight
The average length of the day in September is 12h and 40min.On the first day of September in Runham, United Kingdom, sunrise is at 6:05 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 6:53 am and sunset at 6:32 pm BST.
Sunshine
The average sunshine in September in Runham is 8.1h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily high UV index of 4 in September leads to these guidelines:
Guard yourself - Precautionary measures against sun damage are advocated. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Runham, United Kingdom
- Average high temperature in September: 17.4°C
The warmest month (with the highest average high temperature) is August (19.3°C).
The months with the lowest average high temperature are January and February (6.7°C).
- Average low temperature in September: 13.7°C
The month with the highest average low temperature is August (15.3°C).
The coldest months (with the lowest average low temperature) are January and February (4.3°C).
Average pressure in September
Runham, United Kingdom
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is May (1016.5mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed in September
Runham, United Kingdom
- Average wind speed in September: 20km/h
The windiest month (with the highest average wind speed) is December (27.4km/h).
The calmest month (with the lowest average wind speed) is July (17.1km/h).
Average humidity in September
Runham, United Kingdom
- Average humidity in September: 78%
The months with the highest relative humidity are January, June and December (83%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Runham, United Kingdom
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is October (42mm).
The driest month (with the least rainfall) is April (13mm).
Average rainfall days in September
Runham, United Kingdom
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is October (17.6 days).
The month with the least rainy days is February (12 days).
Average snowfall in September
Runham, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (17mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Runham, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 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
Runham, United Kingdom
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 8h and 6min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The months with the least sunshine are January and February (Average sunshine: 4h and 0min).
Average sunshine days in September
Runham, United Kingdom
- Average sunshine days in September: 13.3 days
The months with the most sunshine days are March and April (15.3 days).
The month with the least sunshine days is November (9.2 days).
Average UV index in September
Runham, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Runham, United Kingdom
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Runham, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
