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 denotes an average high-temperature of a still moderate 14.5°C (58.1°F), subtly different from August's 15.9°C (60.6°F). Ballyshannon, during the nights of September, averages a temperature close to its daytime high, at a fresh 10.1°C (50.2°F).Humidity
January, July through September, with an average relative humidity of 87%, are the most humid months.Rainfall
In September, the rain falls for 19.4 days. Throughout September, 43mm (1.69") of precipitation is accumulated. In Ballyshannon, during the entire year, the rain falls for 234.8 days and collects up to 634mm (24.96") of precipitation.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day in Ballyshannon is 12h and 42min.On the first day of September in Ballyshannon, Ireland, sunrise is at 6:41 am and sunset at 8:23 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:10 pm IST.
Sunshine
In Ballyshannon, Ireland, the average sunshine in September is 5h.UV index
The average daily maximum UV index in September in Ballyshannon is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Exercise prevention - Protecting skin and eyes from harm is required. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Ballyshannon?
What is the most humid month in Ballyshannon?
What is the average humidity in September in Ballyshannon?
How many days does it rain in September in Ballyshannon?
When it does not snow in Ballyshannon?
How many hours of daylight does Ballyshannon have in September?
When is the sunrise / sunset in September in Ballyshannon?
How long on average sun shines in September in Ballyshannon?
How high is the UV index in September in Ballyshannon?
Average temperature in September
Ballyshannon, Ireland
- Average high temperature in September: 14.5°C
The warmest month (with the highest average high temperature) is July (16.2°C).
The month with the lowest average high temperature is January (6.9°C).
- Average low temperature in September: 10.1°C
The months with the highest average low temperature are July and August (11.3°C).
The coldest months (with the lowest average low temperature) are January and February (3.4°C).
Average pressure in September
Ballyshannon, Ireland
- Average pressure in September: 1013.9mbar
The month with the highest atmospheric pressure is May (1015.3mbar).
The month with the lowest atmospheric pressure is November (1006.8mbar).
Average wind speed in September
Ballyshannon, Ireland
- Average wind speed in September: 17.6km/h
The windiest month (with the highest average wind speed) is January (23.7km/h).
The calmest month (with the lowest average wind speed) is July (14.5km/h).
Average humidity in September
Ballyshannon, Ireland
- Average humidity in September: 87%
The months with the highest relative humidity are January, July, August and September (87%).
The month with the lowest relative humidity is April (82%).
Average rainfall in September
Ballyshannon, Ireland
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is August (75mm).
The driest month (with the least rainfall) is April (30mm).
Average rainfall days in September
Ballyshannon, Ireland
- Average rainfall days in September: 19.4 days
The month with the highest number of rainy days is August (23.8 days).
The month with the least rainy days is February (16.8 days).
Average snowfall in September
Ballyshannon, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (20mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Ballyshannon, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.1 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
Ballyshannon, Ireland
- 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: 5h and 0min
The month with the most sunshine is June (Average sunshine: 7h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Ballyshannon, Ireland
- Average sunshine days in September: 7.1 days
The month with the most sunshine days is May (9.9 days).
The month with the least sunshine days is August (3.8 days).
Average UV index in September
Ballyshannon, Ireland
- Average UV index in September: 3
The months with the highest UV index are May, June and July (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
Ballyshannon, Ireland
- Average cloud cover in September: 65
The months with the most cloud cover are January and August (Cloud cover 69).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility in September
Ballyshannon, Ireland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
