September weather forecastGrenagh, Ireland
September
Weather in September
September, the first month of the autumn in Grenagh, is still a refreshing month, with an average temperature ranging between max 15.9°C (60.6°F) and min 10.5°C (50.9°F).Temperature
In September, Grenagh experiences a barely noticeable shift in meteorological conditions, with average high-temperatures moving from 17.6°C (63.7°F) in August to a mild 15.9°C (60.6°F). Throughout September, the temperature tends to fall to a consistent average low of 10.5°C (50.9°F).Humidity
The average relative humidity in September is 86%.Rainfall
In Grenagh, during September, the rain falls for 15.3 days and regularly aggregates up to 41mm (1.61") of precipitation. Throughout the year, there are 198 rainfall days, and 586mm (23.07") of precipitation is accumulated.Snowfall
In Grenagh, snow does not fall in April through October.Daylight
The average length of the day in September in Grenagh is 12h and 39min.On the first day of September in Grenagh, sunrise is at 6:47 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:13 pm IST.
Sunshine
The average sunshine in September is 6.3h.UV index
In September, the average daily maximum UV index in Grenagh is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grenagh, Ireland
- Average high temperature in September: 15.9°C
The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (8.3°C).
- Average low temperature in September: 10.5°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is February (3.9°C).
Average pressure in September
Grenagh, Ireland
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1009mbar).
Average wind speed in September
Grenagh, Ireland
- Average wind speed in September: 17.5km/h
The windiest month (with the highest average wind speed) is December (23.5km/h).
The calmest months (with the lowest average wind speed) are June and July (16.1km/h).
Average humidity in September
Grenagh, Ireland
- Average humidity in September: 86%
The months with the highest relative humidity are October and December (87%).
The months with the lowest relative humidity are February, March and April (84%).
Average rainfall in September
Grenagh, Ireland
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is December (66mm).
The driest month (with the least rainfall) is March (33mm).
Average rainfall days in September
Grenagh, Ireland
- Average rainfall days in September: 15.3 days
The month with the highest number of rainy days is July (21.3 days).
The month with the least rainy days is February (13.5 days).
Average snowfall in September
Grenagh, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is March (6mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Grenagh, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.2 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
Grenagh, Ireland
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 6h and 18min
The month with the most sunshine is June (Average sunshine: 7h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Grenagh, Ireland
- Average sunshine days in September: 10.5 days
The month with the most sunshine days is March (14.3 days).
The month with the least sunshine days is August (5.8 days).
Average UV index in September
Grenagh, Ireland
- Average UV index in September: 3
The months with the highest UV index are 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
Grenagh, Ireland
- Average cloud cover in September: 53
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in September
Grenagh, Ireland
- Average visibility in September: 9km
The months with the highest visibility are February and March (10km).
The months with the lowest visibility are January, April, May, June, July, August, September, October, November and December (9km).
