September weather forecastMillisle, United Kingdom
September
Weather in September
The first month of the autumn, September, is also a moderate month in Millisle, United Kingdom, with an average temperature fluctuating between 15°C (59°F) and 11.9°C (53.4°F).Temperature
Millisle observes a minor difference in average high-temperatures between August's 16°C (60.8°F) and September's 15°C (59°F). A modest decline from daytime high temperatures in Millisle is noticed in September, marking the average low at a fresh 11.9°C (53.4°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In September, the rain falls for 16.1 days. Throughout September, 39mm (1.54") of precipitation is accumulated. In Millisle, during the entire year, the rain falls for 213 days and collects up to 602mm (23.7") of precipitation.Snowfall
In Millisle, snow does not fall in April through October.Sea temperature
September is the month with the warmest seawater in Millisle, with an average sea temperature of 14.3°C (57.7°F).Note: Beware of 14.3°C (57.7°F) waters at 13°C (55.4°F), they're uninviting, and a dip below 10°C (50°F) has risks of breath loss and cold shock, contingent on health.
Daylight
The average length of the day in September in Millisle is 12h and 43min.On the first day of the month, sunrise is at 6:30 am and sunset at 8:13 pm. On the last day of September, sunrise is at 7:23 am and sunset at 7:00 pm BST.
Sunshine
In September, the average sunshine in Millisle is 6.7h.UV index
The months with the highest UV index in Millisle are June through September, with an average maximum UV index of 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Around midday, solar radiation is most harmful; hence, exposure should be limited. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, United Kingdom
- Average sea temperature in September: 14.3°C
The best month for swimming (with the highest average sea temperature) is September (14.3°C).
The coldest month (with the lowest average sea temperature) is March (8°C).
Average daylight in September /
Average sunshine in September
Millisle, United Kingdom
- Average daylight in September: 12h and 42min
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 42min
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
Millisle, 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
Millisle, 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
Millisle, 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
Millisle, 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).
