September weather forecastMersham, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a refreshing month in Mersham, United Kingdom, with temperature in the range of an average high of 17.8°C (64°F) and an average low of 13.5°C (56.3°F).Temperature
The onset of September marks an average high-temperature of a comfortable 17.8°C (64°F), hardly differing from August's 20°C (68°F). Mersham indicates a consistently low-temperature of 13.5°C (56.3°F) during the nights of September.Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 78%.Rainfall
In Mersham, during September, the rain falls for 11.1 days and regularly aggregates up to 27mm (1.06") of precipitation. In Mersham, during the entire year, the rain falls for 170.5 days and collects up to 433mm (17.05") of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Mersham is 12h and 38min.On the first day of September, sunrise is at 6:10 am and sunset at 7:41 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:36 pm BST.
Sunshine
In Mersham, the average sunshine in September is 8.3h.UV index
In September, the average daily maximum UV index in Mersham is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Exercise prevention - Precautions against solar damage are endorsed. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mersham, United Kingdom
- Average high temperature in September: 17.8°C
The warmest month (with the highest average high temperature) is August (20°C).
The month with the lowest average high temperature is January (7.2°C).
- Average low temperature in September: 13.5°C
The month with the highest average low temperature is August (15.5°C).
The coldest month (with the lowest average low temperature) is January (4.1°C).
Average pressure in September
Mersham, United Kingdom
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is September (1017.2mbar).
The month with the lowest atmospheric pressure is November (1011.1mbar).
Average wind speed in September
Mersham, United Kingdom
- Average wind speed in September: 18.7km/h
The windiest month (with the highest average wind speed) is December (25km/h).
The calmest month (with the lowest average wind speed) is July (16.6km/h).
Average humidity in September
Mersham, United Kingdom
- Average humidity in September: 78%
The month with the highest relative humidity is December (85%).
The months with the lowest relative humidity are August and September (78%).
Average rainfall in September
Mersham, United Kingdom
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is November (56mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Mersham, United Kingdom
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is November (17.5 days).
The month with the least rainy days is September (11.1 days).
Average snowfall in September
Mersham, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Mersham, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 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
Mersham, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Mersham, United Kingdom
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is May (15.8 days).
The month with the least sunshine days is November (9.5 days).
Average UV index in September
Mersham, United Kingdom
- Average UV index in September: 4
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in September
Mersham, United Kingdom
- Average cloud cover in September: 39
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are August and September (Cloud cover 39).
Average visibility in September
Mersham, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January and February (9km).
