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 average high-temperature during September registers at a cool 12.5°C (54.5°F), closely corresponding to the preceding month. Nights during September maintain a steady temperature, averaging at a chilly 7.5°C (45.5°F).Humidity
The months with the highest humidity are January, September, November and December, with an average relative humidity of 90%.Rainfall
In Letterfearn, during September, the rain falls for 22.9 days and regularly aggregates up to 90mm (3.54") of precipitation. In Letterfearn, during the entire year, the rain falls for 257.7 days and collects up to 1158mm (45.59") of precipitation.Snowfall
In Letterfearn, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 46min.On the first day of the month, sunrise is at 6:25 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:24 am and sunset at 6:58 pm BST.
Sunshine
The average sunshine in September is 3.4h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 3. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average UV index of 3 in September transforms into this advice:
Be vigilant - Suggestions to stave off sun damage are provided. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the average September temperature in Letterfearn?
What is the most humid month in Letterfearn?
What is the average humidity in September in Letterfearn?
How many days does it rain in September in Letterfearn?
When it does not snow in Letterfearn?
Does it snow in Letterfearn in September?
What is the average length of the day in September in Letterfearn?
What time are sunrise and sunset in September in Letterfearn?
How many hours of sunshine does Letterfearn have in September?
What is the month with the highest UV index in Letterfearn?
What is the UV index reading in September in Letterfearn?
Average temperature in September
Letterfearn, United Kingdom
- Average high temperature in September: 12.5°C
The warmest month (with the highest average high temperature) is July (14.8°C).
The month with the lowest average high temperature is January (3.5°C).
- Average low temperature in September: 7.5°C
The months with the highest average low temperature are July and August (8.8°C).
The coldest month (with the lowest average low temperature) is February (0.3°C).
Average pressure in September
Letterfearn, United Kingdom
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The months with the lowest atmospheric pressure are November and December (1005.4mbar).
Average wind speed in September
Letterfearn, United Kingdom
- Average wind speed in September: 14.1km/h
The windiest month (with the highest average wind speed) is January (18.6km/h).
The calmest month (with the lowest average wind speed) is June (11km/h).
Average humidity in September
Letterfearn, United Kingdom
- Average humidity in September: 90%
The months with the highest relative humidity are January, September, November and December (90%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Letterfearn, United Kingdom
- Average rainfall in September: 90mm
The wettest month (with the highest rainfall) is December (134mm).
The driest month (with the least rainfall) is April (51mm).
Average rainfall days in September
Letterfearn, United Kingdom
- Average rainfall days in September: 22.9 days
The month with the highest number of rainy days is August (24.8 days).
The month with the least rainy days is February (17.2 days).
Average snowfall in September
Letterfearn, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (105mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Letterfearn, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Letterfearn, United Kingdom
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 17h and 48min).
The month with the shortest days is December (Average daylight: 6h and 48min).
- Average sunshine in September: 3h and 2min
The months with the most sunshine are April, May and June (Average sunshine: 4h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 12min).
Average sunshine days in September
Letterfearn, United Kingdom
- Average sunshine days in September: 4.9 days
The month with the most sunshine days is May (8.2 days).
The month with the least sunshine days is August (4.3 days).
Average UV index in September
Letterfearn, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July, August and September (UV index 3).
The months with the lowest UV index are January and November (UV index 1).
Average cloud cover in September
Letterfearn, United Kingdom
- Average cloud cover in September: 77
The month with the most cloud cover is August (Cloud cover 78).
The month with the least cloud cover is April (Cloud cover 68).
Average visibility in September
Letterfearn, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are April and May (9km).
The month with the lowest visibility is August (7km).
Letterfearn, United Kingdom
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