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 shift into September uncovers an average high-temperature of a mild 15°C (59°F), subtly different from the previous month. Ballywalter records a negligible downturn from daytime temperatures, averaging a low of 11.9°C (53.4°F) in the month of September.Humidity
In Ballywalter, the average relative humidity in September is 83%.Rainfall
In September, in Ballywalter, the rain falls for 16.1 days. Throughout September, 39mm (1.54") of precipitation is accumulated. Throughout the year, there are 213 rainfall days, and 602mm (23.7") of precipitation is accumulated.Snowfall
In Ballywalter, snow does not fall in April through October.Sea temperature
August and September, with an average sea temperature of 14.3°C (57.7°F), are months with the warmest seawater.Note: Unprotected swimming in 14.3°C (57.7°F) is dangerous due to potential cold shock. Especially when temperatures go below 10°C (50°F), leading to hyperventilation.
Daylight
The average length of the day in September is 12h and 42min.On the first day of September in Ballywalter, sunrise is at 6:30 am and sunset at 8:13 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:00 pm BST.
Sunshine
In September, the average sunshine is 6.7h.UV index
June through September, with an average maximum UV index of 4, are months with the highest UV index in Ballywalter, United Kingdom. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 4 during September leads to these advisories:
Act with care - The suggestion to avoid sunburn is emphasized. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Frequently asked questions
What is the average September temperature in Ballywalter?
What is the average humidity in September in Ballywalter?
How much does it rain in Ballywalter in September?
When it does not snow in Ballywalter?
When is the sea warmest in Ballywalter?
What is the water temperature in September in Ballywalter?
What is the average length of the day in September in Ballywalter?
When are sunrise and sunset in September in Ballywalter?
How long on average sun shines in September in Ballywalter?
When is the highest UV index in Ballywalter?
What is the UV index reading in September in Ballywalter?
Average temperature in September
Ballywalter, United Kingdom
- Average high temperature in September: 15°C
The warmest month (with the highest average high temperature) is July (16.2°C).
The month with the lowest average high temperature is February (7.3°C).
- Average low temperature in September: 11.9°C
The month with the highest average low temperature is August (12.8°C).
The coldest month (with the lowest average low temperature) is February (4.6°C).
Average pressure in September
Ballywalter, United Kingdom
- Average pressure in September: 1014.2mbar
The month with the highest atmospheric pressure is May (1015.6mbar).
The month with the lowest atmospheric pressure is November (1007.3mbar).
Average wind speed in September
Ballywalter, United Kingdom
- Average wind speed in September: 22km/h
The windiest month (with the highest average wind speed) is December (28km/h).
The calmest month (with the lowest average wind speed) is June (16.7km/h).
Average humidity in September
Ballywalter, United Kingdom
- Average humidity in September: 83%
The months with the highest relative humidity are July and August (85%).
The months with the lowest relative humidity are March, April, May and November (81%).
Average rainfall in September
Ballywalter, United Kingdom
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is August (72mm).
The driest month (with the least rainfall) is May (33mm).
Average rainfall days in September
Ballywalter, United Kingdom
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is August (21.5 days).
The month with the least rainy days is April (15 days).
Average snowfall in September
Ballywalter, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is March (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Ballywalter, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.9 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average sea temperature in September
Ballywalter, United Kingdom
- Average sea temperature in September: 14.3°C
The best months for swimming (with the highest average sea temperature) are August and September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (7.8°C).
Average daylight in September /
Average sunshine in September
Ballywalter, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 8h and 12min).
The months with the least sunshine are January and February (Average sunshine: 3h and 54min).
Average sunshine days in September
Ballywalter, United Kingdom
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is April (12.3 days).
The month with the least sunshine days is August (6.4 days).
Average UV index in September
Ballywalter, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are 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
Ballywalter, United Kingdom
- Average cloud cover in September: 53
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are April and May (Cloud cover 51).
Average visibility in September
Ballywalter, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are March, April, September, October, November and December (10km).
The months with the lowest visibility are January, February, May, June, July and August (9km).
Ballywalter, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
