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
The arrival of September is marked by an average high-temperature of a moderate 15.1°C (59.2°F), bearing a close resemblance to August. Derrymullen cools down to an average low-temperature of 8.5°C (47.3°F) throughout the month of September.Humidity
The average relative humidity in September in Derrymullen is 90%.Rainfall
In September, the rain falls for 10.1 days. Throughout September, 16mm (0.63") of precipitation is accumulated. In Derrymullen, Ireland, during the entire year, the rain falls for 142.7 days and collects up to 221mm (8.7") of precipitation.Snowfall
In Derrymullen, Ireland, snow does not fall in May through October.Daylight
In September, the average length of the day in Derrymullen is 12h and 41min.On the first day of September in Derrymullen, sunrise is at 6:38 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:06 pm IST.
Sunshine
The average sunshine in September in Derrymullen is 5.6h.UV index
The average daily maximum UV index in September in Derrymullen is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Derrymullen in September?
What is the average humidity in September in Derrymullen?
How much does it rain in Derrymullen in September?
When it does not snow in Derrymullen?
How many hours of daylight does Derrymullen have in September?
When are sunrise and sunset in September in Derrymullen?
How many hours of sunshine does Derrymullen have in September?
What is the UV index reading in September in Derrymullen?
Average temperature in September
Derrymullen, Ireland
- Average high temperature in September: 15.1°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 (6.6°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (10.7°C).
The coldest month (with the lowest average low temperature) is February (1.8°C).
Average pressure in September
Derrymullen, 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
Derrymullen, Ireland
- Average wind speed in September: 14.2km/h
The windiest month (with the highest average wind speed) is January (19.7km/h).
The calmest month (with the lowest average wind speed) is July (12.9km/h).
Average humidity in September
Derrymullen, Ireland
- Average humidity in September: 90%
The month with the highest relative humidity is December (92%).
The months with the lowest relative humidity are April and May (86%).
Average rainfall in September
Derrymullen, Ireland
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is August (26mm).
The driest months (with the least rainfall) are January and October (13mm).
Average rainfall days in September
Derrymullen, Ireland
- Average rainfall days in September: 10.1 days
The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is October (9.8 days).
Average snowfall in September
Derrymullen, Ireland
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (15mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Derrymullen, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.7 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
Derrymullen, 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: 5h and 4min
The month with the most sunshine is April (Average sunshine: 6h and 12min).
The month with the least sunshine is February (Average sunshine: 3h and 36min).
Average sunshine days in September
Derrymullen, Ireland
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is December (15.8 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Derrymullen, Ireland
- Average UV index in September: 3
The months with the highest UV index are May, June and August (UV index 4).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Derrymullen, Ireland
- Average cloud cover in September: 63
The month with the most cloud cover is July (Cloud cover 69).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility in September
Derrymullen, Ireland
- Average visibility in September: 8km
The months with the highest visibility are January, February, March and December (9km).
The month with the lowest visibility is July (7km).
Derrymullen, Ireland
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