September weather forecastKillilan, United Kingdom
September
Weather in September
September, the first month of the autumn in Killilan, is still a cool month, with temperature in the range of an average low of 7.5°C (45.5°F) and an average high of 12.5°C (54.5°F).Temperature
The advent of September denotes an average high-temperature of a fresh 12.5°C (54.5°F), subtly different from August's 14.3°C (57.7°F). During the September nights, Killilan's temperature maintains an average close to the daytime highs, settling at a chilly 7.5°C (45.5°F).Humidity
January, September, November and December, with an average relative humidity of 90%, are the most humid months in Killilan.Rainfall
In September, the rain falls for 22.9 days. Throughout September, 90mm (3.54") of precipitation is accumulated. Throughout the year, there are 257.7 rainfall days, and 1158mm (45.59") of precipitation is accumulated.Snowfall
In Killilan, snow does not fall in June through September.Daylight
In September, the average length of the day in Killilan is 12h and 47min.On the first day of September, sunrise is at 6:24 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 6:58 pm BST.
Sunshine
The average sunshine in September in Killilan is 3.4h.UV index
May through September, with an average maximum UV index of 3, are months with the highest UV index in Killilan. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Take precautions - Protection against sun damage is advised. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Killilan, United Kingdom
- Average high temperature in September: 12.5°C
The warmest month (with the highest average high temperature) is July (14.8°C).
The month with the lowest average high temperature is January (3.5°C).
- Average low temperature in September: 7.5°C
The months with the highest average low temperature are July and August (8.8°C).
The coldest month (with the lowest average low temperature) is February (0.3°C).
Average pressure in September
Killilan, United Kingdom
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The months with the lowest atmospheric pressure are November and December (1005.4mbar).
Average wind speed in September
Killilan, United Kingdom
- Average wind speed in September: 14.1km/h
The windiest month (with the highest average wind speed) is January (18.6km/h).
The calmest month (with the lowest average wind speed) is June (11km/h).
Average humidity in September
Killilan, United Kingdom
- Average humidity in September: 90%
The months with the highest relative humidity are January, September, November and December (90%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Killilan, United Kingdom
- Average rainfall in September: 90mm
The wettest month (with the highest rainfall) is December (134mm).
The driest month (with the least rainfall) is April (51mm).
Average rainfall days in September
Killilan, United Kingdom
- Average rainfall days in September: 22.9 days
The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is February (17.2 days).
Average snowfall in September
Killilan, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (105mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Killilan, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Killilan, United Kingdom
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 17h and 54min).
The month with the shortest days is December (Average daylight: 6h and 48min).
- Average sunshine in September: 3h and 24min
The months with the most sunshine are April, May and June (Average sunshine: 4h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 12min).
Average sunshine days in September
Killilan, United Kingdom
- Average sunshine days in September: 4.9 days
The month with the most sunshine days is May (8.2 days).
The month with the least sunshine days is August (4.3 days).
Average UV index in September
Killilan, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July, August and September (UV index 3).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in September
Killilan, United Kingdom
- Average cloud cover in September: 77
The month with the most cloud cover is August (Cloud cover 78).
The month with the least cloud cover is April (Cloud cover 68).
Average visibility in September
Killilan, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are April and May (9km).
The month with the lowest visibility is August (7km).
