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
September
Weather in September
Temperature
The advent of September sees the average high-temperature at a mild 14.7°C (58.5°F), subtly shifted from August's 16.3°C (61.3°F). September nights are marked by an average temperature drop to a frosty 9.6°C (49.3°F).Humidity
In September, the average relative humidity in Ballymena, United Kingdom, is 87%.Rainfall
The months with the least rainfall in Ballymena are January and September Rain falls for 8.8 days and accumulates 11mm (0.43") of rain.Snowfall
In Ballymena, snow does not fall in April through November.Daylight
The average length of the day in September in Ballymena, United Kingdom, is 12h and 43min.On the first day of September, sunrise is at 6:32 am and sunset at 8:17 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:03 pm BST.
Sunshine
The average sunshine in September in Ballymena is 5.6h.UV index
In September, the average daily maximum UV index is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Ballymena?
What is the average humidity in September in Ballymena?
What is the driest month in Ballymena?
How much does it rain in Ballymena in September?
When it does not snow in Ballymena?
What is the average length of the day in September in Ballymena?
When are sunrise and sunset in September in Ballymena?
How many hours of sunshine does Ballymena have in September?
What is the UV index reading in September in Ballymena?
Average temperature in September
Ballymena, United Kingdom
- Average high temperature in September: 14.7°C
The warmest month (with the highest average high temperature) is July (16.8°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 (10.8°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Ballymena, United Kingdom
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is May (1015.4mbar).
The month with the lowest atmospheric pressure is November (1007mbar).
Average wind speed in September
Ballymena, United Kingdom
- Average wind speed in September: 16.8km/h
The windiest month (with the highest average wind speed) is January (21.5km/h).
The calmest month (with the lowest average wind speed) is July (13.8km/h).
Average humidity in September
Ballymena, United Kingdom
- Average humidity in September: 87%
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
Ballymena, United Kingdom
- Average rainfall in September: 11mm
The wettest month (with the highest rainfall) is June (29mm).
The driest months (with the least rainfall) are January and September (11mm).
Average rainfall days in September
Ballymena, United Kingdom
- Average rainfall days in September: 8.8 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (8.3 days).
Average snowfall in September
Ballymena, United Kingdom
- Average snowfall in September: 0mm
The months with the highest snowfall are February and March (13mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Ballymena, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2.3 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Ballymena, 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 0min).
The month with the least sunshine is February (Average sunshine: 3h and 30min).
Average sunshine days in September
Ballymena, United Kingdom
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is December (19 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Ballymena, United Kingdom
- Average UV index in September: 3
The months with the highest UV index are May, 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
Ballymena, United Kingdom
- Average cloud cover in September: 61
The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is April (Cloud cover 57).
Average visibility in September
Ballymena, 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).
