September weather forecastFahan, Ireland
September
Weather in September
September, the first month of the autumn in Fahan, is also a moderate month, with an average temperature ranging between max 14.9°C (58.8°F) and min 9.7°C (49.5°F).Temperature
The transition into September notes an average high-temperature of a mild 14.9°C (58.8°F), revealing a mild distinction from the 16°C (60.8°F) in August. During September, Fahan observes a consistent average nighttime temperature of 9.7°C (49.5°F).Humidity
The average relative humidity in September is 86%.Rainfall
In Fahan, in September, during 19.9 rainfall days, 43mm (1.69") of precipitation is typically accumulated. In Fahan, during the entire year, the rain falls for 225.7 days and collects up to 615mm (24.21") of precipitation.Snowfall
In Fahan, snow does not fall in April through October.Daylight
In Fahan, the average length of the day in September is 12h and 43min.On the first day of the month, sunrise is at 6:37 am and sunset at 8:22 pm. On the last day of September, sunrise is at 7:31 am and sunset at 7:07 pm IST.
Sunshine
In September, the average sunshine in Fahan, Ireland, is 5.4h.UV index
In Fahan, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The average daily UV index of 3 in September transforms into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Fahan, Ireland
- Average high temperature in September: 14.9°C
The warmest month (with the highest average high temperature) is July (16.3°C).
The month with the lowest average high temperature is January (6.8°C).
- Average low temperature in September: 9.7°C
The month with the highest average low temperature is July (11.2°C).
The coldest month (with the lowest average low temperature) is February (3.3°C).
Average pressure in September
Fahan, Ireland
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is May (1015.1mbar).
The month with the lowest atmospheric pressure is November (1006.5mbar).
Average wind speed in September
Fahan, Ireland
- Average wind speed in September: 18km/h
The windiest month (with the highest average wind speed) is January (23.6km/h).
The calmest month (with the lowest average wind speed) is July (14.7km/h).
Average humidity in September
Fahan, Ireland
- Average humidity in September: 86%
The months with the highest relative humidity are July and August (87%).
The months with the lowest relative humidity are March and April (82%).
Average rainfall in September
Fahan, Ireland
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is August (83mm).
The driest month (with the least rainfall) is April (29mm).
Average rainfall days in September
Fahan, Ireland
- Average rainfall days in September: 19.9 days
The month with the highest number of rainy days is August (25.4 days).
The month with the least rainy days is February (13.4 days).
Average snowfall in September
Fahan, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (25mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Fahan, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 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
Fahan, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in September: 5h and 24min
The month with the most sunshine is June (Average sunshine: 7h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Fahan, Ireland
- Average sunshine days in September: 6.5 days
The month with the most sunshine days is April (12.5 days).
The month with the least sunshine days is August (3.3 days).
Average UV index in September
Fahan, Ireland
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Fahan, Ireland
- Average cloud cover in September: 62
The months with the most cloud cover are January and July (Cloud cover 65).
The month with the least cloud cover is April (Cloud cover 55).
Average visibility in September
Fahan, Ireland
- Average visibility in September: 9km
The month with the highest visibility is February (10km).
The months with the lowest visibility are January, March, April, May, June, July, August, September, October, November and December (9km).
