September weather forecastGlencullen, Ireland
September
Weather in September
The first month of the autumn, September, is still a mild month in Glencullen, Ireland, with temperature in the range of an average low of 11.3°C (52.3°F) and an average high of 15.2°C (59.4°F).Temperature
The shift from August to September is characterized by an average high-temperature of a mild 15.2°C (59.4°F), not significantly different from the 16.9°C (62.4°F) of August. The temperature during September experiences a small drop from daytime peaks, recording an average of 11.3°C (52.3°F) at night.Humidity
In Glencullen, the average relative humidity in September is 85%.Rainfall
In Glencullen, Ireland, in September, it is raining for 14.9 days, with typically 36mm (1.42") of accumulated precipitation. In Glencullen, during the entire year, the rain falls for 200.5 days and collects up to 530mm (20.87") of precipitation.Snowfall
In Glencullen, snow does not fall in April through October.Daylight
In September, the average length of the day in Glencullen 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
In Glencullen, the average sunshine in September is 7.3h.UV index
May through September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Take precautions - Protection against skin and eye damage is obliged. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Glencullen, Ireland
- Average high temperature in September: 15.2°C
The warmest months (with the highest average high temperature) are July and August (16.9°C).
The months with the lowest average high temperature are January and February (7.8°C).
- Average low temperature in September: 11.3°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 (4.4°C).
Average pressure in September
Glencullen, Ireland
- Average pressure in September: 1015.4mbar
The month with the highest atmospheric pressure is May (1016mbar).
The month with the lowest atmospheric pressure is November (1008.3mbar).
Average wind speed in September
Glencullen, Ireland
- Average wind speed in September: 19.1km/h
The windiest month (with the highest average wind speed) is December (25.9km/h).
The calmest month (with the lowest average wind speed) is July (15.9km/h).
Average humidity in September
Glencullen, Ireland
- Average humidity in September: 85%
The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is March (82%).
Average rainfall in September
Glencullen, Ireland
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is November (71mm).
The driest month (with the least rainfall) is May (27mm).
Average rainfall days in September
Glencullen, Ireland
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is July (20.4 days).
The months with the least rainy days are March and September (14.9 days).
Average snowfall in September
Glencullen, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Glencullen, Ireland
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.3 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
Glencullen, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 36min).
- Average sunshine in September: 7h and 18min
The month with the most sunshine is May (Average sunshine: 8h and 0min).
The month with the least sunshine is November (Average sunshine: 4h and 18min).
Average sunshine days in September
Glencullen, Ireland
- Average sunshine days in September: 11 days
The month with the most sunshine days is April (11.7 days).
The month with the least sunshine days is July (7.2 days).
Average UV index in September
Glencullen, 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
Glencullen, Ireland
- Average cloud cover in September: 48
The months with the most cloud cover are February and November (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 48).
Average visibility in September
Glencullen, Ireland
- Average visibility in September: 9km
The months with the highest visibility are January, March, October and November (10km).
The months with the lowest visibility are February, April, May, June, July, August, September and December (9km).
