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
The commencement of September introduces an average high-temperature of a still comfortable 17.1°C (62.8°F), closely mirroring the preceding month. The average low-temperature, in September, in Penarth, is a cool 11.4°C (52.5°F).Humidity
The average relative humidity in September in Penarth is 83%.Rainfall
In September, the rain falls for 10 days. Throughout September, 17mm (0.67") of precipitation is accumulated. In Penarth, during the entire year, the rain falls for 132.6 days and collects up to 252mm (9.92") of precipitation.Snowfall
March through October are months without snowfall in Penarth, United Kingdom.Sea temperature
August and September, with an average sea temperature of 16.6°C (61.9°F), are months with the warmest seawater.Note: Most people find swimming in 16.6°C (61.9°F) to be not enjoyable. The control of one's breathing becomes more challenging as the water temperature drops below 21°C (69.8°F).
Daylight
In Penarth, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:58 pm. On the last day of September, in Penarth, sunrise is at 7:12 am and sunset at 6:52 pm BST.
Sunshine
In September, the average sunshine is 7.2h.UV index
The months with the highest UV index in Penarth are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Take necessary precautions - Defending against sun damage is advocated. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly.
Frequently asked questions
What is the average September temperature in Penarth?
What is the average humidity in September in Penarth?
How much does it rain in Penarth in September?
When it does not snow in Penarth?
What are the months with the warmest sea water in Penarth?
What is the sea temperature in September in Penarth?
What is the average length of the day in September in Penarth?
When are sunrise and sunset in September in Penarth?
How long on average sun shines in September in Penarth?
What is the month with the highest UV index in Penarth?
What is the UV index reading in September in Penarth?
Average temperature in September
Penarth, United Kingdom
- Average high temperature in September: 17.1°C
The warmest month (with the highest average high temperature) is July (19°C).
The month with the lowest average high temperature is January (7.5°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure in September
Penarth, United Kingdom
- Average pressure in September: 1016.8mbar
The month with the highest atmospheric pressure is September (1016.8mbar).
The month with the lowest atmospheric pressure is November (1010mbar).
Average wind speed in September
Penarth, United Kingdom
- Average wind speed in September: 16.3km/h
The windiest month (with the highest average wind speed) is February (22.3km/h).
The calmest months (with the lowest average wind speed) are June and July (15.2km/h).
Average humidity in September
Penarth, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are November and December (86%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Penarth, United Kingdom
- Average rainfall in September: 17mm
The wettest months (with the highest rainfall) are August and November (31mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in September
Penarth, United Kingdom
- Average rainfall days in September: 10 days
The month with the highest number of rainy days is November (13.5 days).
The months with the least rainy days are February and April (9.1 days).
Average snowfall in September
Penarth, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (5mm).
The months with the least snowfall are March, April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Penarth, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Penarth, United Kingdom
- Average sea temperature in September: 16.6°C
The best months for swimming (with the highest average sea temperature) are August and September (16.6°C).
The coldest month (with the lowest average sea temperature) is March (8.7°C).
Average daylight in September /
Average sunshine in September
Penarth, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 1min
The month with the most sunshine is May (Average sunshine: 8h and 12min).
The month with the least sunshine is November (Average sunshine: 3h and 54min).
Average sunshine days in September
Penarth, United Kingdom
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is April (19.2 days).
The month with the least sunshine days is November (13.7 days).
Average UV index in September
Penarth, 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
Penarth, United Kingdom
- Average cloud cover in September: 50
The month with the most cloud cover is November (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 46).
Average visibility in September
Penarth, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are February, March and December (10km).
The months with the lowest visibility are January, April, May, June, July, August, September, October and November (9km).
Penarth, United Kingdom
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