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
With the arrival of September, Randalstown's average high-temperature registers at a mild 14.7°C (58.5°F), indicating a subtle variation from the previous month. Throughout September, Randalstown records an average temperature of 9.6°C (49.3°F) at night.Humidity
The average relative humidity in September is 88%.Rainfall
September is the month with the least rainfall in Randalstown, United Kingdom. Rain falls for 17.1 days and accumulates 38mm (1.5") of precipitation.Snowfall
In Randalstown, snow does not fall in May through October.Daylight
In September, the average length of the day in Randalstown is 12h and 43min.On the first day of the month, sunrise is at 6:33 am and sunset at 8:16 pm. On the last day of September, in Randalstown, United Kingdom, sunrise is at 7:26 am and sunset at 7:03 pm BST.
Sunshine
In Randalstown, the average sunshine in September is 5.6h.UV index
In Randalstown, the average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Randalstown?
What is the average humidity in September in Randalstown?
What is the driest month in Randalstown?
How much does it rain in Randalstown in September?
When it does not snow in Randalstown?
How many hours of daylight does Randalstown have in September?
What time are sunrise and sunset in September in Randalstown?
How many hours of sunshine does Randalstown have in September?
What is the UV index intensity in September in Randalstown?
Average temperature in September
Randalstown, United Kingdom
- Average high temperature in September: 14.7°C
The warmest month (with the highest average high temperature) is July (16.7°C).
The month with the lowest average high temperature is January (6.1°C).
- Average low temperature in September: 9.6°C
The month with the highest average low temperature is August (10.9°C).
The coldest month (with the lowest average low temperature) is February (2.4°C).
Average pressure in September
Randalstown, United Kingdom
- Average pressure in September: 1014mbar
The month with the highest atmospheric pressure is May (1015.5mbar).
The month with the lowest atmospheric pressure is November (1007.1mbar).
Average wind speed in September
Randalstown, United Kingdom
- Average wind speed in September: 16.8km/h
The windiest month (with the highest average wind speed) is January (21.4km/h).
The calmest month (with the lowest average wind speed) is July (13.7km/h).
Average humidity in September
Randalstown, United Kingdom
- Average humidity in September: 88%
The months with the highest relative humidity are January and December (89%).
The months with the lowest relative humidity are April and May (83%).
Average rainfall in September
Randalstown, United Kingdom
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is August (75mm).
The driest month (with the least rainfall) is September (38mm).
Average rainfall days in September
Randalstown, United Kingdom
- Average rainfall days in September: 17.1 days
The month with the highest number of rainy days is August (23.2 days).
The month with the least rainy days is February (16.8 days).
Average snowfall in September
Randalstown, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (37mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Randalstown, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Randalstown, 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 18min).
- Average sunshine in September: 5h and 4min
The month with the most sunshine is June (Average sunshine: 7h and 6min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in September
Randalstown, United Kingdom
- Average sunshine days in September: 7.4 days
The months with the most sunshine days are April and May (10 days).
The month with the least sunshine days is August (5.3 days).
Average UV index in September
Randalstown, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are June 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
Randalstown, United Kingdom
- Average cloud cover in September: 60
The months with the most cloud cover are January and February (Cloud cover 65).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in September
Randalstown, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (9km).
The month with the lowest visibility is July (8km).
Randalstown, United Kingdom
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