Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
Swanbourne records an average high-temperature of an enjoyable 18.1°C (64.6°F) as September arrives, nearly mirroring the previous month's climate. In Swanbourne, the average low-temperature during the month of September is a fresh 10.4°C (50.7°F).Humidity
In Swanbourne, United Kingdom, the average relative humidity in September is 80%.Rainfall
September is the month with the least rainfall in Swanbourne. Rain falls for 10 days and accumulates 15mm (0.59") of precipitation.Snowfall
In Swanbourne, United Kingdom, snow does not fall in May through November.Daylight
The average length of the day in September is 12h and 39min.On the first day of the month, sunrise is at 6:16 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:42 pm BST.
Sunshine
In September, the average sunshine in Swanbourne is 6.9h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. The solar radiation around mid-day is intense; avoid the Sun and stay safe. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Swanbourne in September?
What is the average humidity in September in Swanbourne?
What is the driest month in Swanbourne?
How much does it rain in Swanbourne in September?
When it does not snow in Swanbourne?
What is the average length of the day in September in Swanbourne?
When is the sunrise / sunset in September in Swanbourne?
How long on average sun shines in September in Swanbourne?
What are the months with the highest UV index in Swanbourne?
What is the UV index reading in September in Swanbourne?
Average temperature in September
Swanbourne, United Kingdom
- Average high temperature in September: 18.1°C
The warmest month (with the highest average high temperature) is July (20.9°C).
The month with the lowest average high temperature is January (6.1°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 (1.5°C).
Average pressure in September
Swanbourne, United Kingdom
- Average pressure in September: 1016.6mbar
The months with the highest atmospheric pressure are May and September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1010.1mbar).
Average wind speed in September
Swanbourne, United Kingdom
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is December (18.7km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in September
Swanbourne, United Kingdom
- Average humidity in September: 80%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is August (78%).
Average rainfall in September
Swanbourne, United Kingdom
- Average rainfall in September: 15mm
The wettest month (with the highest rainfall) is June (36mm).
The driest month (with the least rainfall) is September (15mm).
Average rainfall days in September
Swanbourne, United Kingdom
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (9.9 days).
Average snowfall in September
Swanbourne, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (11mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Swanbourne, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.7 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
Swanbourne, United Kingdom
- Average daylight in September: 12h and 4min
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: 6h and 5min
The month with the most sunshine is July (Average sunshine: 7h and 30min).
The month with the least sunshine is February (Average sunshine: 3h and 42min).
Average sunshine days in September
Swanbourne, United Kingdom
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is March (16.5 days).
The month with the least sunshine days is August (10.3 days).
Average UV index in September
Swanbourne, 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, November and December (UV index 2).
Average cloud cover in September
Swanbourne, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is November (Cloud cover 62).
The month with the least cloud cover is September (Cloud cover 51).
Average visibility in September
Swanbourne, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, July, August, September, October and December (9km).
The months with the lowest visibility are June and November (8km).
