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
Greyabbey, United Kingdom, marks the start of September with an average high-temperature of a mild 14.9°C (58.8°F), hinting at a slight fluctuation from August's 16.3°C (61.3°F). A mild drop to an average of 11.5°C (52.7°F) marks the nights during September.Humidity
In Greyabbey, the average relative humidity in September is 84%.Rainfall
In Greyabbey, in September, during 12.6 rainfall days, 24mm (0.94") of precipitation is typically accumulated. In Greyabbey, during the entire year, the rain falls for 173.9 days and collects up to 363mm (14.29") of precipitation.Snowfall
April through November are months without snowfall.Sea temperature
September is the month with the warmest seawater, with an average sea temperature of 14.3°C (57.7°F).Note: It is advised against swimming in 14.3°C (57.7°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
In September, the average length of the day in Greyabbey, United Kingdom, is 12h and 42min.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, in Greyabbey, United Kingdom, sunrise is at 7:23 am and sunset at 7:00 pm BST.
Sunshine
In September, the average sunshine in Greyabbey is 6.6h.UV index
June through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Be vigilant - Suggestions to stave off sun damage are provided. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Frequently asked questions
What are the temperatures in Greyabbey in September?
What is the average humidity in September in Greyabbey?
How many days does it rain in September in Greyabbey?
When it does not snow in Greyabbey?
What is the month with the warmest sea water in Greyabbey?
How cold is the water in September in Greyabbey?
What is the average length of the day in September in Greyabbey?
When are sunrise and sunset in September in Greyabbey?
How long on average sun shines in September in Greyabbey?
When is the highest UV index in Greyabbey?
What is the UV index reading in September in Greyabbey?
Average temperature in September
Greyabbey, United Kingdom
- Average high temperature in September: 14.9°C
The warmest month (with the highest average high temperature) is July (16.4°C).
The month with the lowest average high temperature is January (7°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (12.3°C).
The coldest month (with the lowest average low temperature) is February (4.1°C).
Average pressure in September
Greyabbey, 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
Greyabbey, United Kingdom
- Average wind speed in September: 20.5km/h
The windiest month (with the highest average wind speed) is December (25.8km/h).
The calmest month (with the lowest average wind speed) is June (15.7km/h).
Average humidity in September
Greyabbey, United Kingdom
- Average humidity in September: 84%
The months with the highest relative humidity are July and August (85%).
The months with the lowest relative humidity are April and May (81%).
Average rainfall in September
Greyabbey, United Kingdom
- Average rainfall in September: 24mm
The wettest month (with the highest rainfall) is November (48mm).
The driest month (with the least rainfall) is May (17mm).
Average rainfall days in September
Greyabbey, United Kingdom
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is August (16.7 days).
The month with the least rainy days is September (12.6 days).
Average snowfall in September
Greyabbey, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (8mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Greyabbey, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Greyabbey, 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
Greyabbey, 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 0min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Greyabbey, United Kingdom
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is April (14.7 days).
The months with the least sunshine days are August and October (10.8 days).
Average UV index in September
Greyabbey, 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
Greyabbey, United Kingdom
- Average cloud cover in September: 54
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 51).
Average visibility in September
Greyabbey, United Kingdom
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, August, September, October, November and December (10km).
The months with the lowest visibility are January, June and July (9km).
Greyabbey, United Kingdom
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