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 notes an average high-temperature of a still refreshing 15.8°C (60.4°F), revealing a mild distinction from the 17.2°C (63°F) in August. Llanasa's temperature during September nights registers a minor decrease to an average low of 11.7°C (53.1°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In September, in Llanasa, the rain falls for 11.8 days. Throughout September, 19mm (0.75") of precipitation is accumulated. In Llanasa, during the entire year, the rain falls for 160.9 days and collects up to 292mm (11.5") of precipitation.Snowfall
May through November are months without snowfall in Llanasa.Daylight
The average length of the day in September in Llanasa is 12h and 41min.On the first day of the month, sunrise is at 6:23 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:14 am and sunset at 6:52 pm BST.
Sunshine
The average sunshine in September is 6.6h.UV index
The months with the highest UV index in Llanasa are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 4 translates into these guidelines:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Frequently asked questions
What is the usual temperature for Llanasa in September?
What is the average humidity in September in Llanasa?
How much does it rain in Llanasa in September?
When it does not snow in Llanasa?
How many hours of daylight does Llanasa have in September?
When are sunrise and sunset in September in Llanasa?
How many hours of sunshine does Llanasa have in September?
When is the highest UV index in Llanasa?
How high is the UV index in September in Llanasa?
Average temperature in September
Llanasa, United Kingdom
- Average high temperature in September: 15.8°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.7°C
The month with the highest average low temperature is August (13°C).
The coldest month (with the lowest average low temperature) is February (4.1°C).
Average pressure in September
Llanasa, United Kingdom
- Average pressure in September: 1015.5mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).
Average wind speed in September
Llanasa, United Kingdom
- Average wind speed in September: 18.4km/h
The windiest month (with the highest average wind speed) is December (24.1km/h).
The calmest month (with the lowest average wind speed) is June (14.8km/h).
Average humidity in September
Llanasa, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are January and December (84%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Llanasa, United Kingdom
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is June (34mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Llanasa, United Kingdom
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (10.9 days).
Average snowfall in September
Llanasa, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (11mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Llanasa, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Llanasa, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is May (Average sunshine: 7h and 42min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days in September
Llanasa, United Kingdom
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is March (15.3 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Llanasa, 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, March, November and December (UV index 2).
Average cloud cover in September
Llanasa, United Kingdom
- Average cloud cover in September: 54
The month with the most cloud cover is November (Cloud cover 64).
The month with the least cloud cover is May (Cloud cover 49).
Average visibility in September
Llanasa, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
Llanasa, United Kingdom
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