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 advent of September brings an average high-temperature of a still refreshing 15.5°C (59.9°F), almost identical to the preceding month. September records a small disparity from daytime temperatures, marking an average low-temperature of 13.5°C (56.3°F).Humidity
In September, the average relative humidity is 81%.Rainfall
In September, the rain falls for 19.5 days. Throughout September, 61mm (2.4") of precipitation is accumulated. In Llanfachraeth, during the entire year, the rain falls for 233.6 days and collects up to 739mm (29.09") of precipitation.Snowfall
In Llanfachraeth, snow does not fall in April through October.Daylight
In September, the average length of the day in Llanfachraeth is 12h and 41min.On the first day of September, sunrise is at 6:28 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 6:56 pm BST.
Sunshine
The average sunshine in September is 6.8h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Llanfachraeth, United Kingdom. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The UV index of 4 during September leads to these advisories:
Preventative actions are necessary - The mandate to avoid skin and eye damage is in place. It's recommended to limit sun exposure when its radiation is at its peak during midday. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What is the temperature in September in Llanfachraeth?
What is the average humidity in September in Llanfachraeth?
How much does it rain in Llanfachraeth in September?
When it does not snow in Llanfachraeth?
How many hours of daylight does Llanfachraeth have in September?
When are sunrise and sunset in September in Llanfachraeth?
How many hours of sunshine does Llanfachraeth have in September?
What are the months with the highest UV index in Llanfachraeth?
What is the UV index intensity in September in Llanfachraeth?
Average temperature in September
Llanfachraeth, United Kingdom
- Average high temperature in September: 15.5°C
The warmest month (with the highest average high temperature) is August (16.6°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in September: 13.5°C
The month with the highest average low temperature is August (14.3°C).
The coldest month (with the lowest average low temperature) is February (5.8°C).
Average pressure in September
Llanfachraeth, United Kingdom
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.1mbar).
The month with the lowest atmospheric pressure is November (1008.7mbar).
Average wind speed in September
Llanfachraeth, United Kingdom
- Average wind speed in September: 23.5km/h
The windiest month (with the highest average wind speed) is December (31.3km/h).
The calmest month (with the lowest average wind speed) is June (18.7km/h).
Average humidity in September
Llanfachraeth, United Kingdom
- Average humidity in September: 81%
The months with the highest relative humidity are July and August (84%).
The month with the lowest relative humidity is November (79%).
Average rainfall in September
Llanfachraeth, United Kingdom
- Average rainfall in September: 61mm
The wettest month (with the highest rainfall) is November (87mm).
The driest month (with the least rainfall) is May (36mm).
Average rainfall days in September
Llanfachraeth, United Kingdom
- Average rainfall days in September: 19.5 days
The month with the highest number of rainy days is August (23.4 days).
The month with the least rainy days is April (15.6 days).
Average snowfall in September
Llanfachraeth, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are January and December (4mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Llanfachraeth, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
Llanfachraeth, 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 5min
The month with the most sunshine is May (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Llanfachraeth, United Kingdom
- Average sunshine days in September: 8.1 days
The month with the most sunshine days is May (12.3 days).
The month with the least sunshine days is December (4.3 days).
Average UV index in September
Llanfachraeth, 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
Llanfachraeth, United Kingdom
- Average cloud cover in September: 53
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 46).
Average visibility in September
Llanfachraeth, 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).
Llanfachraeth, United Kingdom
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