September weather forecastSonning, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a comfortable month in Sonning, United Kingdom, with an average temperature ranging between min 10.4°C (50.7°F) and max 18.4°C (65.1°F).Temperature
September experiences an average high-temperature of an enjoyable 18.4°C (65.1°F), barely different from August's 20.8°C (69.4°F). September brings an average low-temperature of 10.4°C (50.7°F) to Sonning.Humidity
In September, the average relative humidity is 81%.Rainfall
September is the month with the least rainfall in Sonning. Rain falls for 10.3 days and accumulates 17mm (0.67") of precipitation.Snowfall
In Sonning, snow does not fall in April through October.Daylight
The average length of the day in September in Sonning is 12h and 38min.On the first day of the month, sunrise is at 6:17 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:43 pm BST.
Sunshine
The average sunshine in September in Sonning, United Kingdom, is 7h.UV index
In September, the average daily maximum UV index in Sonning is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The UV index of 4 in September translates into these instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sonning, United Kingdom
- Average high temperature in September: 18.4°C
The warmest month (with the highest average high temperature) is July (21.4°C).
The month with the lowest average high temperature is January (6.6°C).
- Average low temperature in September: 10.4°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (1.8°C).
Average pressure in September
Sonning, United Kingdom
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1010.4mbar).
Average wind speed in September
Sonning, United Kingdom
- Average wind speed in September: 13.1km/h
The windiest month (with the highest average wind speed) is February (18km/h).
The calmest month (with the lowest average wind speed) is July (13km/h).
Average humidity in September
Sonning, United Kingdom
- Average humidity in September: 81%
The month with the highest relative humidity is December (90%).
The months with the lowest relative humidity are July and August (79%).
Average rainfall in September
Sonning, United Kingdom
- Average rainfall in September: 17mm
The wettest month (with the highest rainfall) is November (36mm).
The driest month (with the least rainfall) is September (17mm).
Average rainfall days in September
Sonning, United Kingdom
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is September (10.3 days).
Average snowfall in September
Sonning, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (11mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Sonning, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.9 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
Sonning, 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: 7h and 54min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is July (Average sunshine: 7h and 54min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Sonning, United Kingdom
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is September (17.7 days).
The month with the least sunshine days is July (11.7 days).
Average UV index in September
Sonning, 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, November and December (UV index 2).
Average cloud cover in September
Sonning, United Kingdom
- Average cloud cover in September: 50
The month with the most cloud cover is November (Cloud cover 63).
The months with the least cloud cover are April and September (Cloud cover 50).
Average visibility in September
Sonning, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (9km).
The months with the lowest visibility are October and November (8km).
