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 sea temperature 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
September's advent denotes a minor fluctuation in the average high-temperature to a mild 15.3°C (59.5°F) from August's 16.8°C (62.2°F). In the month of September, Llandudno experiences a minor discrepancy from peak daytime temperatures, settling at an average low-temperature of 11.5°C (52.7°F).Humidity
In Llandudno, the average relative humidity in September is 84%.Rainfall
In Llandudno, in September, it is raining for 17.9 days, with typically 45mm (1.77") of accumulated precipitation. In Llandudno, United Kingdom, during the entire year, the rain falls for 228.5 days and collects up to 604mm (23.78") of precipitation.Snowfall
In Llandudno, snow does not fall in May through October.Sea temperature
In Llandudno, the average seawater temperature in September is 16°C (60.8°F).Note: Swimming in water at 16°C (60.8°F) is not a pleasing experience for the majority. As the temperature descends from 21°C (69.8°F) to 15°C (59°F), controlling breathing becomes increasingly hard.
Daylight
In September, the average length of the day is 12h and 41min.On the first day of the month, sunrise is at 6:25 am and sunset at 8:04 pm. On the last day of September, in Llandudno, United Kingdom, sunrise is at 7:16 am and sunset at 6:54 pm BST.
Sunshine
In Llandudno, the average sunshine in September is 6.5h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Frequently asked questions
What is the usual temperature for Llandudno in September?
What is the average humidity in September in Llandudno?
How much does it rain in Llandudno in September?
When it does not snow in Llandudno?
How cold is the water in September in Llandudno?
What is the average length of the day in September in Llandudno?
What time are sunrise and sunset in September in Llandudno?
How long on average sun shines in September in Llandudno?
What are the months with the highest UV index in Llandudno?
What is the UV index intensity in September in Llandudno?
Average temperature in September
Llandudno, 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
Llandudno, 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
Llandudno, 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
Llandudno, 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
Llandudno, 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
Llandudno, 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
Llandudno, 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
Llandudno, 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 sea temperature in September
Llandudno, United Kingdom
- Average sea temperature in September: 16°C
The best month for swimming (with the highest average sea temperature) is August (16.3°C).
The coldest months (with the lowest average sea temperature) are February and March (7.7°C).
Average daylight in September /
Average sunshine in September
Llandudno, 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 3min
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
Llandudno, 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
Llandudno, 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
Llandudno, 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
Llandudno, 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).
Llandudno, United Kingdom
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