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
September
Weather in September
Temperature
With the onset of September, the average high-temperature stands at a mild 15.8°C (60.4°F), closely aligned with August's 17.2°C (63°F). During September, the nighttime temperatures in Rhyl align closely with the daytime averages, measuring a cool 11.7°C (53.1°F).Humidity
The average relative humidity in September is 83%.Rainfall
In Rhyl, in September, it is raining for 11.8 days, with typically 19mm (0.75") of accumulated precipitation. In Rhyl, during the entire year, the rain falls for 160.9 days and collects up to 292mm (11.5") of precipitation.Snowfall
May through November are months without snowfall in Rhyl.Sea temperature
In Rhyl, the average seawater temperature in September is 16.2°C (61.2°F).Note: For swimming, a surface water temperature of 16.2°C (61.2°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).
Daylight
The average length of the day in September in Rhyl is 12h and 41min.On the first day of the month, sunrise is at 6:24 am and sunset at 8:03 pm. On the last day of September, in Rhyl, sunrise is at 7:14 am and sunset at 6:52 pm BST.
Sunshine
In Rhyl, the average sunshine in September is 6.6h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 4 during September translates into the following directions:
Guard yourself - Avoiding sunburn is suggested. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Rhyl in September?
What is the average humidity in September in Rhyl?
How much does it rain in Rhyl in September?
When it does not snow in Rhyl?
What is the sea temperature in September in Rhyl?
How many hours of daylight does Rhyl have in September?
When is the sunrise / sunset in September in Rhyl?
How long on average sun shines in September in Rhyl?
What are the months with the highest UV index in Rhyl?
What is the UV index reading in September in Rhyl?
Average temperature in September
Rhyl, United Kingdom
- Average high temperature in September: 15.8°C
The warmest month (with the highest average high temperature) is July (17.3°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 11.7°C
The month with the highest average low temperature is August (13°C).
The coldest month (with the lowest average low temperature) is February (4.1°C).
Average pressure in September
Rhyl, United Kingdom
- Average pressure in September: 1015.5mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.9mbar).
Average wind speed in September
Rhyl, United Kingdom
- Average wind speed in September: 18.4km/h
The windiest month (with the highest average wind speed) is December (24.1km/h).
The calmest month (with the lowest average wind speed) is June (14.8km/h).
Average humidity in September
Rhyl, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are January and December (84%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Rhyl, United Kingdom
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is June (34mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Rhyl, United Kingdom
- Average rainfall days in September: 11.8 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is February (10.9 days).
Average snowfall in September
Rhyl, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (11mm).
The months with the least snowfall are May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Rhyl, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Rhyl, United Kingdom
- Average sea temperature in September: 16.2°C
The best month for swimming (with the highest average sea temperature) is August (16.7°C).
The coldest months (with the lowest average sea temperature) are February and March (7.4°C).
Average daylight in September /
Average sunshine in September
Rhyl, 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 4min
The month with the most sunshine is May (Average sunshine: 7h and 42min).
The month with the least sunshine is November (Average sunshine: 3h and 36min).
Average sunshine days in September
Rhyl, United Kingdom
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is March (15.3 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Rhyl, 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
Rhyl, United Kingdom
- Average cloud cover in September: 54
The month with the most cloud cover is November (Cloud cover 64).
The month with the least cloud cover is May (Cloud cover 49).
Average visibility in September
Rhyl, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (10km).
The month with the lowest visibility is July (9km).
