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
September's beginning signals an average high-temperature of a still comfortable 17.4°C (63.3°F), barely different from August's 19.6°C (67.3°F). During September, the temperature tends to dip to an average of 9.7°C (49.5°F) at night.Humidity
The average relative humidity in September is 82%.Rainfall
In Illey, in September, it is raining for 13.2 days, with typically 24mm (0.94") of accumulated precipitation. In Illey, during the entire year, the rain falls for 176.5 days and collects up to 391mm (15.39") of precipitation.Snowfall
April through October are months without snowfall in Illey, United Kingdom.Daylight
In September, the average length of the day in Illey is 12h and 40min.On the first day of September, sunrise is at 6:20 am and sunset at 7:55 pm. On the last day of the month, sunrise is at 7:08 am and sunset at 6:47 pm BST.
Sunshine
The average sunshine in September in Illey is 6.1h.UV index
The months with the highest UV index in Illey, United Kingdom, are May through September, with an average maximum UV index of 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: A daily high UV index of 4 in September leads to these guidelines:
Undertake precautions - Guarding against sun damage is counselled. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Illey?
What is the average humidity in September in Illey?
How many days does it rain in September in Illey?
When it does not snow in Illey?
How many hours of daylight does Illey have in September?
When are sunrise and sunset in September in Illey?
How many hours of sunshine does Illey have in September?
What are the months with the highest UV index in Illey?
What is the UV index reading in September in Illey?
Average temperature in September
Illey, United Kingdom
- Average high temperature in September: 17.4°C
The warmest month (with the highest average high temperature) is July (20.3°C).
The month with the lowest average high temperature is January (6.1°C).
- Average low temperature in September: 9.7°C
The month with the highest average low temperature is August (12°C).
The coldest month (with the lowest average low temperature) is January (1.4°C).
Average pressure in September
Illey, United Kingdom
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009.7mbar).
Average wind speed in September
Illey, 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 (12.6km/h).
Average humidity in September
Illey, United Kingdom
- Average humidity in September: 82%
The month with the highest relative humidity is December (90%).
The months with the lowest relative humidity are May, July and August (80%).
Average rainfall in September
Illey, United Kingdom
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is June (52mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Illey, United Kingdom
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is February (11.8 days).
Average snowfall in September
Illey, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (29mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Illey, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.1 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Illey, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is July (Average sunshine: 6h and 54min).
The months with the least sunshine are February and November (Average sunshine: 3h and 30min).
Average sunshine days in September
Illey, United Kingdom
- Average sunshine days in September: 13.3 days
The month with the most sunshine days is March (14.2 days).
The month with the least sunshine days is August (8.4 days).
Average UV index in September
Illey, 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
Illey, United Kingdom
- Average cloud cover in September: 57
The month with the most cloud cover is November (Cloud cover 65).
The month with the least cloud cover is April (Cloud cover 55).
Average visibility in September
Illey, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, July, August and October (9km).
The months with the lowest visibility are September, November and December (8km).
