September weather forecastLetterbreen, United Kingdom
September
Weather in September
The first month of the autumn, September, is still a mild month in Letterbreen, United Kingdom, with an average temperature fluctuating between 14.5°C (58.1°F) and 8.1°C (46.6°F).Temperature
As September takes its course, Letterbreen's average high-temperature registers at a moderate 14.5°C (58.1°F), closely aligning with the preceding month. Letterbreen observes an average low-temperature of 8.1°C (46.6°F) during September nights.Humidity
In September, the average relative humidity in Letterbreen is 90%.Rainfall
In Letterbreen, United Kingdom, in September, it is raining for 15.1 days, with typically 32mm (1.26") of accumulated precipitation. In Letterbreen, during the entire year, the rain falls for 195 days and collects up to 525mm (20.67") of precipitation.Snowfall
In Letterbreen, snow does not fall in May through November.Daylight
The average length of the day in September in Letterbreen is 12h and 42min.On the first day of the month, sunrise is at 6:39 am and sunset at 8:21 pm. On the last day of September, sunrise is at 7:32 am and sunset at 7:09 pm BST.
Sunshine
In Letterbreen, the average sunshine in September is 4.5h.UV index
In September, the average daily maximum UV index in Letterbreen is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The UV index of 3 in September translates into these instructions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Letterbreen, United Kingdom
- Average high temperature in September: 14.5°C
The warmest month (with the highest average high temperature) is July (16.8°C).
The month with the lowest average high temperature is January (5.9°C).
- Average low temperature in September: 8.1°C
The months with the highest average low temperature are July and August (9.8°C).
The coldest months (with the lowest average low temperature) are January and February (1.5°C).
Average pressure in September
Letterbreen, United Kingdom
- Average pressure in September: 1014.1mbar
The month with the highest atmospheric pressure is May (1015.4mbar).
The month with the lowest atmospheric pressure is November (1007.1mbar).
Average wind speed in September
Letterbreen, United Kingdom
- Average wind speed in September: 12.4km/h
The windiest month (with the highest average wind speed) is January (16.9km/h).
The calmest month (with the lowest average wind speed) is July (11km/h).
Average humidity in September
Letterbreen, United Kingdom
- Average humidity in September: 90%
The months with the highest relative humidity are November and December (92%).
The month with the lowest relative humidity is April (85%).
Average rainfall in September
Letterbreen, United Kingdom
- Average rainfall in September: 32mm
The wettest month (with the highest rainfall) is August (59mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in September
Letterbreen, United Kingdom
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is February (13.5 days).
Average snowfall in September
Letterbreen, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (31mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Letterbreen, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Letterbreen, United Kingdom
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 4h and 30min
The month with the most sunshine is June (Average sunshine: 6h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Letterbreen, United Kingdom
- Average sunshine days in September: 12.7 days
The months with the most sunshine days are September and December (12.7 days).
The month with the least sunshine days is July (7.5 days).
Average UV index in September
Letterbreen, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May and June (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
Letterbreen, United Kingdom
- Average cloud cover in September: 71
The month with the most cloud cover is August (Cloud cover 76).
The month with the least cloud cover is April (Cloud cover 63).
Average visibility in September
Letterbreen, United Kingdom
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, April, May, June, November and December (8km).
The months with the lowest visibility are July, August, September and October (7km).
