September weather forecastLlanfairfechan, United Kingdom
September
Weather in September
The first month of the autumn, September, is also a moderate month in Llanfairfechan, United Kingdom, with temperature in the range of an average low of 11.5°C (52.7°F) and an average high of 15.3°C (59.5°F).Temperature
The transition into September shows a subtle variation to a moderate 15.3°C (59.5°F) from August's 16.8°C (62.2°F) in the average high-temperature. The temperature in Llanfairfechan during September sees a subtle transition from day to night, averaging a low of 11.5°C (52.7°F).Humidity
In Llanfairfechan, the average relative humidity in September is 84%.Rainfall
In Llanfairfechan, in September, it is raining for 17.9 days, with typically 45mm (1.77") of accumulated precipitation. In Llanfairfechan, during the entire year, the rain falls for 228.5 days and collects up to 604mm (23.78") of precipitation.Snowfall
May through October are months without snowfall in Llanfairfechan.Daylight
The average length of the day in September is 12h and 41min.On the first day of the month, sunrise is at 6:26 am and sunset at 8:04 pm. On the last day of September, sunrise is at 7:16 am and sunset at 6:54 pm BST.
Sunshine
In September, the average sunshine is 6.5h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index in Llanfairfechan, United Kingdom. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Llanfairfechan, United Kingdom
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is January (3.8°C).
Average pressure in September
Llanfairfechan, United Kingdom
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.8mbar).
Average wind speed in September
Llanfairfechan, United Kingdom
- Average wind speed in September: 17.9km/h
The windiest month (with the highest average wind speed) is December (23.8km/h).
The calmest month (with the lowest average wind speed) is June (14.4km/h).
Average humidity in September
Llanfairfechan, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are January and August (85%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Llanfairfechan, United Kingdom
- Average rainfall in September: 45mm
The wettest month (with the highest rainfall) is November (68mm).
The driest month (with the least rainfall) is May (31mm).
Average rainfall days in September
Llanfairfechan, United Kingdom
- Average rainfall days in September: 17.9 days
The month with the highest number of rainy days is December (22.5 days).
The month with the least rainy days is February (15.8 days).
Average snowfall in September
Llanfairfechan, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (21mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Llanfairfechan, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Llanfairfechan, United Kingdom
- Average daylight in September: 12h and 42min
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 30min
The months with the most sunshine are May and June (Average sunshine: 7h and 42min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days in September
Llanfairfechan, United Kingdom
- Average sunshine days in September: 8.5 days
The months with the most sunshine days are March and May (11 days).
The month with the least sunshine days is November (5.2 days).
Average UV index in September
Llanfairfechan, 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, March, November and December (UV index 2).
Average cloud cover in September
Llanfairfechan, United Kingdom
- Average cloud cover in September: 55
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is May (Cloud cover 49).
Average visibility in September
Llanfairfechan, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, September and October (10km).
The months with the lowest visibility are January, February, April, May, June, July, August, November and December (9km).
