Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's arrival brings an average high-temperature of a mild 15.2°C (59.4°F), demonstrating subtle variation from the preceding month. An average low-temperature of 11.3°C (52.3°F) is witnessed throughout the month of September, a mere drop from the daytime peak.Humidity
In September, the average relative humidity is 85%.Rainfall
In Dalkey, in September, it is raining for 14.9 days, with typically 36mm (1.42") of accumulated precipitation. Throughout the year, there are 200.5 rainfall days, and 530mm (20.87") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Dalkey, Ireland, the average length of the day in September is 12h and 41min.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 Dalkey, 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 of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum UV index of 4 in September translates into the following recommendations:
Take precautions - Protection against skin and eye damage is obliged. It's recommended to limit sun exposure when its radiation is at its peak during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Frequently asked questions
What is the temperature in September in Dalkey?
What is the average humidity in September in Dalkey?
How many days does it rain in September in Dalkey?
When it does not snow in Dalkey?
What is the average length of the day in September in Dalkey?
When are sunrise and sunset in September in Dalkey?
How long on average sun shines in September in Dalkey?
What is the month with the highest UV index in Dalkey?
What is the UV index reading in September in Dalkey?
Average temperature in September
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, Ireland
- Average daylight in September: 12h and 4min
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 2min
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
Dalkey, 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
Dalkey, 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
Dalkey, 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
Dalkey, 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).
Dalkey, Ireland
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