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
Weather in September
Temperature
The transition into September is marked with an average high-temperature of a refreshing 17.8°C (64°F), showing an insignificant shift from August's 20.2°C (68.4°F). In Alton Barnes, September nights witness a steady temperature drop to a fresh 10.1°C (50.2°F).Humidity
In Alton Barnes, the average relative humidity in September is 83%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.4 days and typically collects 23mm (0.91") of precipitation.Snowfall
In Alton Barnes, snow does not fall in April through October.Daylight
In September, the average length of the day in Alton Barnes is 12h and 38min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:07 am and sunset at 6:47 pm BST.
Sunshine
In September, the average sunshine in Alton Barnes is 7.1h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Make use of precautions - It is urged to ward off sun damage. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Frequently asked questions
What is the average September temperature in Alton Barnes?
What is the average humidity in September in Alton Barnes?
What is the driest month in Alton Barnes?
How much does it rain in Alton Barnes in September?
When it does not snow in Alton Barnes?
What is the average length of the day in September in Alton Barnes?
When are sunrise and sunset in September in Alton Barnes?
How many hours of sunshine does Alton Barnes have in September?
When is the highest UV index in Alton Barnes?
What is the UV index reading in September in Alton Barnes?
Average temperature in September
Alton Barnes, United Kingdom
- Average high temperature in September: 17.8°C
The warmest month (with the highest average high temperature) is July (20.7°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 10.1°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is January (1.9°C).
Average pressure in September
Alton Barnes, 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
Alton Barnes, United Kingdom
- Average wind speed in September: 12.8km/h
The windiest month (with the highest average wind speed) is February (17.2km/h).
The calmest month (with the lowest average wind speed) is July (12.6km/h).
Average humidity in September
Alton Barnes, United Kingdom
- Average humidity in September: 83%
The month with the highest relative humidity is December (91%).
The month with the lowest relative humidity is July (80%).
Average rainfall in September
Alton Barnes, United Kingdom
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is December (52mm).
The driest month (with the least rainfall) is September (23mm).
Average rainfall days in September
Alton Barnes, United Kingdom
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is August (17.8 days).
The month with the least rainy days is September (12.4 days).
Average snowfall in September
Alton Barnes, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (16mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Alton Barnes, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.6 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Alton Barnes, United Kingdom
- Average daylight in September: 12h and 4min
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: 7h and 1min
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
Alton Barnes, United Kingdom
- Average sunshine days in September: 13.7 days
The months with the most sunshine days are March and September (13.7 days).
The month with the least sunshine days is August (9.1 days).
Average UV index in September
Alton Barnes, 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
Alton Barnes, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is November (Cloud cover 64).
The months with the least cloud cover are April and September (Cloud cover 51).
Average visibility in September
Alton Barnes, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are February and March (9km).
The months with the lowest visibility are January, April, May, June, July, August, September, October, November and December (8km).
Alton Barnes, United Kingdom
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