September weather forecastBallyknockan, Ireland
September
Weather in September
September, the first month of the autumn in Ballyknockan, is still a refreshing month, with temperature in the range of an average high of 15.1°C (59.2°F) and an average low of 11.4°C (52.5°F).Temperature
Ballyknockan experiences a subtle adjustment in high-temperatures to a still refreshing 15.1°C (59.2°F) with the onset of September, maintaining near parity with August's 16.6°C (61.9°F). During the September nights, Ballyknockan's temperature maintains an average close to the daytime highs, settling at a cool 11.4°C (52.5°F).Humidity
In September, the average relative humidity is 85%.Rainfall
In Ballyknockan, in September, during 10.1 rainfall days, 18mm (0.71") of precipitation is typically accumulated. In Ballyknockan, during the entire year, the rain falls for 149.4 days and collects up to 284mm (11.18") of precipitation.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:35 am and sunset at 8:13 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:03 pm IST.
Sunshine
The average sunshine in September is 7.2h.UV index
The months with the highest UV index are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a daily UV index of 4 turns into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Ballyknockan, Ireland
- Average high temperature in September: 15.1°C
The warmest month (with the highest average high temperature) is August (16.6°C).
The month with the lowest average high temperature is February (7.8°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (12.7°C).
The coldest month (with the lowest average low temperature) is February (4.8°C).
Average pressure in September
Ballyknockan, Ireland
- Average pressure in September: 1015.6mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.6mbar).
Average wind speed in September
Ballyknockan, Ireland
- Average wind speed in September: 19.5km/h
The windiest month (with the highest average wind speed) is December (26.9km/h).
The calmest month (with the lowest average wind speed) is July (16.6km/h).
Average humidity in September
Ballyknockan, Ireland
- Average humidity in September: 85%
The months with the highest relative humidity are June, July and August (86%).
The month with the lowest relative humidity is March (82%).
Average rainfall in September
Ballyknockan, Ireland
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is November (38mm).
The driest months (with the least rainfall) are January and May (16mm).
Average rainfall days in September
Ballyknockan, Ireland
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is September (10.1 days).
Average snowfall in September
Ballyknockan, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (7mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Ballyknockan, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.3 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Ballyknockan, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 7h and 12min
The months with the most sunshine are May and June (Average sunshine: 7h and 48min).
The months with the least sunshine are February and November (Average sunshine: 4h and 6min).
Average sunshine days in September
Ballyknockan, Ireland
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Ballyknockan, Ireland
- Average UV index in September: 4
The months with the highest UV index are May, June, July, August and September (UV index 4).
The months with the lowest UV index are January, February and November (UV index 2).
Average cloud cover in September
Ballyknockan, Ireland
- Average cloud cover in September: 49
The months with the most cloud cover are February and November (Cloud cover 58).
The month with the least cloud cover is September (Cloud cover 49).
Average visibility in September
Ballyknockan, Ireland
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, June, August, September, October, November and December (10km).
The months with the lowest visibility are May and July (9km).
