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
Llandecwyn in September witnesses an average high-temperature of a still refreshing 14.8°C (58.6°F), indicating a slight variation from August's 16.5°C (61.7°F). Llandecwyn's temperature lowers to a mean of 8.7°C (47.7°F) during the nights in September.Humidity
In Llandecwyn, United Kingdom, the average relative humidity in September is 89%.Rainfall
In Llandecwyn, during September, the rain falls for 18.3 days and regularly aggregates up to 61mm (2.4") of precipitation. Throughout the year, in Llandecwyn, there are 230 rainfall days, and 940mm (37.01") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September in Llandecwyn is 12h and 40min.On the first day of September, sunrise is at 6:27 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:55 pm BST.
Sunshine
The average sunshine in September is 4.9h.UV index
The average daily maximum UV index in September in Llandecwyn, United Kingdom, is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 3 during September leads to these advisories:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Direct Sun exposure should be minimized especially during midday when radiation is most intense. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What are September temperatures in Llandecwyn?
What is the average humidity in September in Llandecwyn?
How much does it rain in Llandecwyn in September?
When it does not snow in Llandecwyn?
What is the average length of the day in September in Llandecwyn?
When is the sunrise / sunset in September in Llandecwyn?
How many hours of sunshine does Llandecwyn have in September?
How high is the UV index in September in Llandecwyn?
Average temperature in September
Llandecwyn, United Kingdom
- Average high temperature in September: 14.8°C
The warmest month (with the highest average high temperature) is July (17.2°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in September: 8.7°C
The month with the highest average low temperature is August (10.6°C).
The coldest month (with the lowest average low temperature) is February (1.5°C).
Average pressure in September
Llandecwyn, 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 (1009.1mbar).
Average wind speed in September
Llandecwyn, United Kingdom
- Average wind speed in September: 12.7km/h
The windiest month (with the highest average wind speed) is December (17.8km/h).
The calmest month (with the lowest average wind speed) is June (11.2km/h).
Average humidity in September
Llandecwyn, United Kingdom
- Average humidity in September: 89%
The months with the highest relative humidity are January and December (91%).
The months with the lowest relative humidity are April and May (84%).
Average rainfall in September
Llandecwyn, United Kingdom
- Average rainfall in September: 61mm
The wettest month (with the highest rainfall) is December (103mm).
The driest months (with the least rainfall) are April and May (52mm).
Average rainfall days in September
Llandecwyn, United Kingdom
- Average rainfall days in September: 18.3 days
The month with the highest number of rainy days is August (22.4 days).
The month with the least rainy days is February (15.3 days).
Average snowfall in September
Llandecwyn, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (70mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Llandecwyn, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Llandecwyn, 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: 4h and 5min
The months with the most sunshine are May and June (Average sunshine: 6h and 12min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Llandecwyn, United Kingdom
- Average sunshine days in September: 8.5 days
The month with the most sunshine days is March (10.8 days).
The month with the least sunshine days is August (5.9 days).
Average UV index in September
Llandecwyn, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June and August (UV index 4).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in September
Llandecwyn, United Kingdom
- Average cloud cover in September: 68
The month with the most cloud cover is December (Cloud cover 76).
The month with the least cloud cover is April (Cloud cover 60).
Average visibility in September
Llandecwyn, United Kingdom
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (8km).
The months with the lowest visibility are August and September (7km).
Llandecwyn, United Kingdom
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