September weather forecastStanmer, United Kingdom
September weather for Stanmer, United Kingdom: In Stanmer, United Kingdom, in September, it is raining for 12.8 days, with typically 33mm (1.3") of accumulated precipitation. September, the first month of the autumn in Stanmer, is also an enjoyable month, with an average temperature varying between 17.8°C (64°F) and 12.9°C (55.2°F).
September
Weather in September
September, the first month of the autumn in Stanmer, is also an enjoyable month, with an average temperature varying between 17.8°C (64°F) and 12.9°C (55.2°F).Temperature
The onset of September brings with it an average high-temperature of a still enjoyable 17.8°C (64°F), showing a negligible variation from the month before. During September, nights in Stanmer cool slightly to an average low of 12.9°C (55.2°F).Humidity
August and September, with an average relative humidity of 79%, are the least humid months.Rainfall
In Stanmer, during September, the rain falls for 12.8 days and regularly aggregates up to 33mm (1.3") of precipitation. In Stanmer, during the entire year, the rain falls for 183 days and collects up to 470mm (18.5") of precipitation.Snowfall
In Stanmer, United Kingdom, snow does not fall in May through October.Daylight
In Stanmer, United Kingdom, the average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 6:15 am and sunset at 7:45 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 6:40 pm BST.
Sunshine
In September, the average sunshine in Stanmer is 8.3h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Stanmer, United Kingdom
- Average high temperature in September: 17.8°C
The warmest month (with the highest average high temperature) is August (19.7°C).
The months with the lowest average high temperature are January and February (7.5°C).
- Average low temperature in September: 12.9°C
The month with the highest average low temperature is August (14.5°C).
The coldest month (with the lowest average low temperature) is February (4.2°C).
Average pressure in September
Stanmer, United Kingdom
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1011mbar).
Average wind speed in September
Stanmer, United Kingdom
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is December (24.6km/h).
The calmest month (with the lowest average wind speed) is July (16.8km/h).
Average humidity in September
Stanmer, United Kingdom
- Average humidity in September: 79%
The months with the highest relative humidity are January and December (85%).
The months with the lowest relative humidity are August and September (79%).
Average rainfall in September
Stanmer, United Kingdom
- Average rainfall in September: 33mm
The wettest months (with the highest rainfall) are November and December (59mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Stanmer, United Kingdom
- Average rainfall days in September: 12.8 days
The month with the highest number of rainy days is November (18.5 days).
The month with the least rainy days is September (12.8 days).
Average snowfall in September
Stanmer, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (8mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Stanmer, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.7 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
Stanmer, United Kingdom
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 24min).
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 July (Average sunshine: 9h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 54min).
Average sunshine days in September
Stanmer, United Kingdom
- Average sunshine days in September: 14.1 days
The month with the most sunshine days is September (14.1 days).
The month with the least sunshine days is November (8.2 days).
Average UV index in September
Stanmer, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in September
Stanmer, United Kingdom
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 59).
The months with the least cloud cover are July and August (Cloud cover 40).
Average visibility in September
Stanmer, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January and December (9km).
