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
As September takes its course, Llanmorlais's average high-temperature registers at a still comfortable 16.5°C (61.7°F), closely aligning with the preceding month. Night temperatures during September in Llanmorlais experience a slight downturn, averaging a fresh 12.6°C (54.7°F).Humidity
In Llanmorlais, the average relative humidity in September is 83%.Rainfall
In Llanmorlais, during September, the rain falls for 16.9 days and regularly aggregates up to 55mm (2.17") of precipitation. Throughout the year, in Llanmorlais, there are 210.8 rainfall days, and 785mm (30.91") of precipitation is accumulated.Snowfall
In Llanmorlais, snow does not fall in April through November.Daylight
The average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 6:29 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:56 pm BST.
Sunshine
In September, the average sunshine in Llanmorlais is 7.1h.UV index
The months with the highest UV index in Llanmorlais are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum daily UV index of 4 during September morphs into the following directions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Llanmorlais in September?
What is the average humidity in September in Llanmorlais?
How many days does it rain in September in Llanmorlais?
When it does not snow in Llanmorlais?
How many hours of daylight does Llanmorlais have in September?
When are sunrise and sunset in September in Llanmorlais?
How many hours of sunshine does Llanmorlais have in September?
What are the months with the highest UV index in Llanmorlais?
What is the UV index intensity in September in Llanmorlais?
Average temperature in September
Llanmorlais, United Kingdom
- Average high temperature in September: 16.5°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in September: 12.6°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°C).
Average pressure in September
Llanmorlais, United Kingdom
- Average pressure in September: 1016.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.8mbar).
Average wind speed in September
Llanmorlais, United Kingdom
- Average wind speed in September: 19.3km/h
The windiest month (with the highest average wind speed) is December (25.7km/h).
The calmest month (with the lowest average wind speed) is June (16.4km/h).
Average humidity in September
Llanmorlais, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are January, August and December (84%).
The month with the lowest relative humidity is April (80%).
Average rainfall in September
Llanmorlais, United Kingdom
- Average rainfall in September: 55mm
The wettest month (with the highest rainfall) is December (101mm).
The driest month (with the least rainfall) is May (37mm).
Average rainfall days in September
Llanmorlais, United Kingdom
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is December (21.4 days).
The month with the least rainy days is April (14.4 days).
Average snowfall in September
Llanmorlais, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is December (8mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Llanmorlais, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (1.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Llanmorlais, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 1min
The months with the most sunshine are April and May (Average sunshine: 8h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Llanmorlais, United Kingdom
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is May (13 days).
The month with the least sunshine days is December (6.6 days).
Average UV index in September
Llanmorlais, 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 and December (UV index 2).
Average cloud cover in September
Llanmorlais, United Kingdom
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 63).
The months with the least cloud cover are April and May (Cloud cover 45).
Average visibility in September
Llanmorlais, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are March, April, June, July and October (10km).
The months with the lowest visibility are January, February, May, August, September, November and December (9km).
