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
The arrival of September brings an average high-temperature of a moderate 15.3°C (59.5°F), closely following the temperature pattern of August. The average temperature during September nights dips to a cool 10°C (50°F).Humidity
In Llannefydd, the average relative humidity in September is 86%.Rainfall
In Llannefydd, in September, it is raining for 14.7 days, with typically 25mm (0.98") of accumulated precipitation. In Llannefydd, during the entire year, the rain falls for 176 days and collects up to 343mm (13.5") of precipitation.Snowfall
In Llannefydd, snow does not fall in May through September.Daylight
In Llannefydd, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:24 am and sunset at 8:03 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 6.1h.UV index
In Llannefydd, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: During September, 3 as the daily maximum UV index converts into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Llannefydd?
What is the average humidity in September in Llannefydd?
How much does it rain in Llannefydd in September?
When it does not snow in Llannefydd?
Does it snow in Llannefydd in September?
What is the average length of the day in September in Llannefydd?
When are sunrise and sunset in September in Llannefydd?
How long on average sun shines in September in Llannefydd?
What is the UV index intensity in September in Llannefydd?
Average temperature in September
Llannefydd, United Kingdom
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (17.5°C).
The months with the lowest average high temperature are January and February (6.3°C).
- Average low temperature in September: 10°C
The month with the highest average low temperature is August (11.8°C).
The coldest months (with the lowest average low temperature) are January and February (2.5°C).
Average pressure in September
Llannefydd, United Kingdom
- Average pressure in September: 1015.7mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1009mbar).
Average wind speed in September
Llannefydd, United Kingdom
- Average wind speed in September: 14.8km/h
The windiest month (with the highest average wind speed) is December (19.5km/h).
The calmest month (with the lowest average wind speed) is June (12.4km/h).
Average humidity in September
Llannefydd, United Kingdom
- Average humidity in September: 86%
The months with the highest relative humidity are January, November and December (88%).
The months with the lowest relative humidity are April and May (82%).
Average rainfall in September
Llannefydd, United Kingdom
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is November (39mm).
The driest month (with the least rainfall) is April (20mm).
Average rainfall days in September
Llannefydd, United Kingdom
- Average rainfall days in September: 14.7 days
The month with the highest number of rainy days is November (17.6 days).
The month with the least rainy days is February (11.7 days).
Average snowfall in September
Llannefydd, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (35mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Llannefydd, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.8 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
Llannefydd, 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 1min
The month with the most sunshine is May (Average sunshine: 7h and 12min).
The month with the least sunshine is November (Average sunshine: 3h and 12min).
Average sunshine days in September
Llannefydd, United Kingdom
- Average sunshine days in September: 11.6 days
The month with the most sunshine days is April (13.1 days).
The month with the least sunshine days is November (7.9 days).
Average UV index in September
Llannefydd, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (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
Llannefydd, United Kingdom
- Average cloud cover in September: 58
The month with the most cloud cover is November (Cloud cover 68).
The months with the least cloud cover are April and May (Cloud cover 53).
Average visibility in September
Llannefydd, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
