September weather forecastClonalvy, Ireland
September
Weather in September
September, the first month of the autumn in Clonalvy, is still a refreshing month, with an average temperature fluctuating between 15.6°C (60.1°F) and 10.6°C (51.1°F).Temperature
During September, Clonalvy observes a subtle ascent to a still refreshing 15.6°C (60.1°F) from August's 17.3°C (63.1°F) in the average high-temperature. September nights in Clonalvy document an average temperature reading of 10.6°C (51.1°F).Humidity
In Clonalvy, Ireland, the average relative humidity in September is 85%.Rainfall
In Clonalvy, in September, it is raining for 10.9 days, with typically 25mm (0.98") of accumulated precipitation. In Clonalvy, during the entire year, the rain falls for 159.4 days and collects up to 362mm (14.25") of precipitation.Snowfall
In Clonalvy, snow does not fall in April through October.Daylight
The average length of the day in September in Clonalvy, Ireland, is 12h and 41min.On the first day of September in Clonalvy, sunrise is at 6:35 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:04 pm IST.
Sunshine
In Clonalvy, the average sunshine in September is 7h.UV index
The months with the highest UV index in Clonalvy, Ireland, are May through September, with an average maximum UV index of 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take heed. Individuals of lighter complexion can be burned in less than half an hour. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clonalvy, Ireland
- Average high temperature in September: 15.6°C
The warmest month (with the highest average high temperature) is July (17.4°C).
The month with the lowest average high temperature is January (7.6°C).
- Average low temperature in September: 10.6°C
The months with the highest average low temperature are July and August (12.1°C).
The coldest months (with the lowest average low temperature) are February and March (3.9°C).
Average pressure in September
Clonalvy, Ireland
- Average pressure in September: 1015.2mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.2mbar).
Average wind speed in September
Clonalvy, Ireland
- Average wind speed in September: 18.1km/h
The windiest month (with the highest average wind speed) is January (24.2km/h).
The calmest month (with the lowest average wind speed) is June (15.2km/h).
Average humidity in September
Clonalvy, Ireland
- Average humidity in September: 85%
The months with the highest relative humidity are July and December (86%).
The months with the lowest relative humidity are March, April and May (83%).
Average rainfall in September
Clonalvy, Ireland
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is November (51mm).
The driest month (with the least rainfall) is May (19mm).
Average rainfall days in September
Clonalvy, Ireland
- Average rainfall days in September: 10.9 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is February (10.7 days).
Average snowfall in September
Clonalvy, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (12mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Clonalvy, 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 May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Clonalvy, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 7h and 0min
The months with the most sunshine are April, May and June (Average sunshine: 7h and 30min).
The months with the least sunshine are January, February and November (Average sunshine: 4h and 18min).
Average sunshine days in September
Clonalvy, Ireland
- Average sunshine days in September: 16.4 days
The months with the most sunshine days are January and December (16.8 days).
The month with the least sunshine days is July (11 days).
Average UV index in September
Clonalvy, 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, November and December (UV index 2).
Average cloud cover in September
Clonalvy, Ireland
- Average cloud cover in September: 50
The months with the most cloud cover are January and February (Cloud cover 57).
The months with the least cloud cover are April and September (Cloud cover 50).
Average visibility in September
Clonalvy, Ireland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, October, November and December (10km).
The months with the lowest visibility are April, May, June, July, August and September (9km).
