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
Porthcawl records a slight change with September's average high-temperatures adjusting to a still comfortable 16.7°C (62.1°F) from August's 18.2°C (64.8°F). Porthcawl's temperature during September nights registers a minor decrease to an average low of 11.9°C (53.4°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In Porthcawl, during September, the rain falls for 10.8 days and regularly aggregates up to 21mm (0.83") of precipitation. In Porthcawl, during the entire year, the rain falls for 148.6 days and collects up to 256mm (10.08") of precipitation.Snowfall
In Porthcawl, snow does not fall in April through November.Sea temperature
In September, the average sea temperature in Porthcawl is 16.8°C (62.2°F).Note: Swimming in water at 16.8°C (62.2°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 Porthcawl, United Kingdom, the average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 6:28 am and sunset at 8:00 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 6:54 pm BST.
Sunshine
In Porthcawl, the average sunshine in September is 6.9h.UV index
The months with the highest UV index in Porthcawl, United Kingdom, are May through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Porthcawl?
What is the average humidity in September in Porthcawl?
How many days does it rain in September in Porthcawl?
When it does not snow in Porthcawl?
How cold is the water in September in Porthcawl?
What is the average length of the day in September in Porthcawl?
What time are sunrise and sunset in September in Porthcawl?
How many hours of sunshine does Porthcawl have in September?
What is the month with the highest UV index in Porthcawl?
What is the UV index reading in September in Porthcawl?
Average temperature in September
Porthcawl, United Kingdom
- Average high temperature in September: 16.7°C
The warmest month (with the highest average high temperature) is July (18.4°C).
The months with the lowest average high temperature are January and February (7.8°C).
- Average low temperature in September: 11.9°C
The month with the highest average low temperature is August (13.7°C).
The coldest month (with the lowest average low temperature) is February (4.4°C).
Average pressure in September
Porthcawl, United Kingdom
- Average pressure in September: 1016.7mbar
The months with the highest atmospheric pressure are May and September (1016.7mbar).
The month with the lowest atmospheric pressure is November (1009.9mbar).
Average wind speed in September
Porthcawl, United Kingdom
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is December (24.6km/h).
The calmest month (with the lowest average wind speed) is June (16.2km/h).
Average humidity in September
Porthcawl, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are January, October, November and December (84%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Porthcawl, United Kingdom
- Average rainfall in September: 21mm
The wettest months (with the highest rainfall) are November and December (33mm).
The driest month (with the least rainfall) is May (9mm).
Average rainfall days in September
Porthcawl, United Kingdom
- Average rainfall days in September: 10.8 days
The months with the highest number of rainy days are November and December (15.5 days).
The month with the least rainy days is May (9.1 days).
Average snowfall in September
Porthcawl, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are January and December (2mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Porthcawl, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in September
Porthcawl, United Kingdom
- Average sea temperature in September: 16.8°C
The best month for swimming (with the highest average sea temperature) is August (17.1°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).
Average daylight in September /
Average sunshine in September
Porthcawl, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 6h and 5min
The month with the most sunshine is May (Average sunshine: 8h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Porthcawl, United Kingdom
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is May (19.1 days).
The month with the least sunshine days is November (10.1 days).
Average UV index in September
Porthcawl, 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, November and December (UV index 2).
Average cloud cover in September
Porthcawl, United Kingdom
- Average cloud cover in September: 52
The months with the most cloud cover are November and December (Cloud cover 62).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility in September
Porthcawl, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, October, November and December (10km).
The months with the lowest visibility are January, July, August and September (9km).
