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 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
Groomsport experiences a minor change to a mild 15°C (59°F) in average high-temperature during September, closely reflecting August. September nights in Groomsport reflect a consistent temperature dip to a cool 11.9°C (53.4°F), a slight descent from daytime peaks.Humidity
In September, the average relative humidity is 83%.Rainfall
In Groomsport, in September, during 16.1 rainfall days, 39mm (1.54") of precipitation is typically accumulated. Throughout the year, there are 213 rainfall days, and 602mm (23.7") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Groomsport, United Kingdom, is 12h and 43min.On the first day of September in Groomsport, sunrise is at 6:30 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 7:00 pm BST.
Sunshine
In Groomsport, the average sunshine in September is 6.7h.UV index
June through September, with an average maximum UV index of 4, are months with the highest UV index in Groomsport. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 4 in September translates into this advice:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Tightly woven clothing, when worn loosely, shields effectively against the Sun.
Frequently asked questions
What is the average September temperature in Groomsport?
What is the average humidity in September in Groomsport?
How much does it rain in Groomsport in September?
When it does not snow in Groomsport?
What is the average length of the day in September in Groomsport?
When are sunrise and sunset in September in Groomsport?
How long on average sun shines in September in Groomsport?
What are the months with the highest UV index in Groomsport?
How high is the UV index in September in Groomsport?
Average temperature in September
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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 daylight in September /
Average sunshine in September
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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
Groomsport, 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).
Groomsport, United Kingdom
Weather forecast for your location
2. Allow the app to use your location
