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
Barmouth notes an average high-temperature of a mild 15°C (59°F) in September, hardly diverging from August. Barmouth experiences an average low-temperature reading of 9.3°C (48.7°F) throughout September.Humidity
In September, the average relative humidity in Barmouth is 88%.Rainfall
In Barmouth, in September, during 16.9 rainfall days, 58mm (2.28") of precipitation is typically accumulated. Throughout the year, there are 218 rainfall days, and 849mm (33.43") of precipitation is accumulated.Snowfall
In Barmouth, snow does not fall in June through October.Sea temperature
With an average sea temperature of 15.7°C (60.3°F), September is the month with the warmest seawater.Note: The majority of individuals find it unpleasurable to swim in 15.7°C (60.3°F). It becomes progressively harder to manage one's breathing as the water temperature falls below 21°C (69.8°F).
Daylight
In Barmouth, United Kingdom, the average length of the day in September is 12h and 40min.On the first day of September, sunrise is at 6:27 am and sunset at 8:04 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 6:55 pm BST.
Sunshine
In Barmouth, the average sunshine in September is 5.7h.UV index
In September, the average daily maximum UV index in Barmouth is 3. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: The daily high UV index of 3 in September translates into this advice:
Prioritize safety - Recommendations to avert sunburn are shared. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Frequently asked questions
What is the usual temperature for Barmouth in September?
What is the average humidity in September in Barmouth?
How many days does it rain in September in Barmouth?
When it does not snow in Barmouth?
What is the month with the warmest sea water in Barmouth?
What is the sea temperature in September in Barmouth?
How many hours of daylight does Barmouth have in September?
When are sunrise and sunset in September in Barmouth?
How long on average sun shines in September in Barmouth?
What is the UV index intensity in September in Barmouth?
Average temperature in September
Barmouth, United Kingdom
- Average high temperature in September: 15°C
The warmest month (with the highest average high temperature) is July (17.2°C).
The month with the lowest average high temperature is January (5.8°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is August (10.8°C).
The coldest month (with the lowest average low temperature) is February (1.9°C).
Average pressure in September
Barmouth, United Kingdom
- Average pressure in September: 1016mbar
The month with the highest atmospheric pressure is May (1016.3mbar).
The month with the lowest atmospheric pressure is November (1009.2mbar).
Average wind speed in September
Barmouth, United Kingdom
- Average wind speed in September: 13.8km/h
The windiest month (with the highest average wind speed) is December (19.1km/h).
The calmest month (with the lowest average wind speed) is June (11.9km/h).
Average humidity in September
Barmouth, United Kingdom
- Average humidity in September: 88%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Barmouth, United Kingdom
- Average rainfall in September: 58mm
The wettest month (with the highest rainfall) is December (94mm).
The driest month (with the least rainfall) is May (41mm).
Average rainfall days in September
Barmouth, United Kingdom
- Average rainfall days in September: 16.9 days
The month with the highest number of rainy days is November (21 days).
The month with the least rainy days is February (14.7 days).
Average snowfall in September
Barmouth, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is January (57mm).
The months with the least snowfall are June, July, August, September and October (0mm).
Average snowfall days in September
Barmouth, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (5.7 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average sea temperature in September
Barmouth, United Kingdom
- Average sea temperature in September: 15.7°C
The best month for swimming (with the highest average sea temperature) is September (15.7°C).
The coldest months (with the lowest average sea temperature) are February and March (8.3°C).
Average daylight in September /
Average sunshine in September
Barmouth, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 5h and 4min
The month with the most sunshine is May (Average sunshine: 7h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in September
Barmouth, United Kingdom
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is March (11.7 days).
The month with the least sunshine days is November (6.4 days).
Average UV index in September
Barmouth, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (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
Barmouth, United Kingdom
- Average cloud cover in September: 60
The month with the most cloud cover is December (Cloud cover 70).
The month with the least cloud cover is April (Cloud cover 54).
Average visibility in September
Barmouth, United Kingdom
- Average visibility in September: 8km
The months with the highest visibility are March, April, November and December (9km).
The months with the lowest visibility are January, February, May, June, July, August, September and October (8km).
Barmouth, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
