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 from August to September sees an average high-temperature of a mild 15.5°C (59.9°F), indicating a minor variance from the prior month. Llanengan's September nights observe a minor shift from the daytime temperatures, resulting in an average dip to a still refreshing 13.4°C (56.1°F).Humidity
In Llanengan, the average relative humidity in September is 81%.Rainfall
In Llanengan, during September, the rain falls for 17.2 days and regularly aggregates up to 61mm (2.4") of precipitation. Throughout the year, there are 214.6 rainfall days, and 798mm (31.42") of precipitation is accumulated.Snowfall
April through November are months without snowfall in Llanengan.Daylight
In September, the average length of the day is 12h and 40min.On the first day of the month, sunrise is at 6:29 am and sunset at 8:06 pm. On the last day of September, in Llanengan, sunrise is at 7:18 am and sunset at 6:57 pm BST.
Sunshine
The average sunshine in September in Llanengan 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 moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Take necessary precautions - Protection from skin and eye injury is mandatory. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Llanengan?
What is the average humidity in September in Llanengan?
How much does it rain in Llanengan in September?
When it does not snow in Llanengan?
How many hours of daylight does Llanengan have in September?
What time are sunrise and sunset in September in Llanengan?
How long on average sun shines in September in Llanengan?
What is the month with the highest UV index in Llanengan?
What is the UV index intensity in September in Llanengan?
Average temperature in September
Llanengan, United Kingdom
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is August (16.3°C).
The month with the lowest average high temperature is February (7.6°C).
- Average low temperature in September: 13.4°C
The month with the highest average low temperature is August (14.1°C).
The coldest month (with the lowest average low temperature) is February (5.7°C).
Average pressure in September
Llanengan, United Kingdom
- Average pressure in September: 1015.9mbar
The month with the highest atmospheric pressure is May (1016.3mbar).
The month with the lowest atmospheric pressure is November (1009mbar).
Average wind speed in September
Llanengan, United Kingdom
- Average wind speed in September: 23.9km/h
The windiest month (with the highest average wind speed) is December (32.6km/h).
The calmest month (with the lowest average wind speed) is June (18.9km/h).
Average humidity in September
Llanengan, United Kingdom
- Average humidity in September: 81%
The months with the highest relative humidity are June and July (84%).
The month with the lowest relative humidity is November (78%).
Average rainfall in September
Llanengan, United Kingdom
- Average rainfall in September: 61mm
The wettest month (with the highest rainfall) is November (99mm).
The driest months (with the least rainfall) are April and May (42mm).
Average rainfall days in September
Llanengan, United Kingdom
- Average rainfall days in September: 17.2 days
The month with the highest number of rainy days is November (21.4 days).
The month with the least rainy days is May (14.7 days).
Average snowfall in September
Llanengan, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (6mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Llanengan, United Kingdom
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Llanengan, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is May (Average sunshine: 8h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Llanengan, United Kingdom
- Average sunshine days in September: 11.5 days
The month with the most sunshine days is May (13.9 days).
The month with the least sunshine days is November (6.5 days).
Average UV index in September
Llanengan, 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 and February (UV index 2).
Average cloud cover in September
Llanengan, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 64).
The months with the least cloud cover are May and June (Cloud cover 45).
Average visibility in September
Llanengan, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (10km).
The month with the lowest visibility is January (9km).
Llanengan, United Kingdom
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