September weather forecastDonard, Ireland
September
Weather in September
September, the first month of the autumn in Donard, is still a mild month, with an average temperature varying between 8.5°C (47.3°F) and 15.1°C (59.2°F).Temperature
The transition into September is marked with an average high-temperature of a mild 15.1°C (59.2°F), showing an insignificant shift from August's 17.1°C (62.8°F). During September, Donard witnesses a consistent average low-temperature of 8.5°C (47.3°F).Humidity
In September, the average relative humidity is 90%.Rainfall
In September, in Donard, the rain falls for 10.1 days. Throughout September, 16mm (0.63") of precipitation is accumulated. In Donard, during the entire year, the rain falls for 142.7 days and collects up to 221mm (8.7") of precipitation.Snowfall
In Donard, snow does not fall in May through October.Daylight
The average length of the day in September in Donard is 12h and 40min.On the first day of the month, sunrise is at 6:37 am and sunset at 8:15 pm. On the last day of September, sunrise is at 7:27 am and sunset at 7:05 pm IST.
Sunshine
The average sunshine in September is 5.6h.UV index
In September, the average daily maximum UV index in Donard is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum daily UV index of 3 during September translates into the following directions:
Prioritize safety - Suggestions to prevent sun damage are offered. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Donard, 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
Donard, 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
Donard, 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
Donard, 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
Donard, 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
Donard, 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
Donard, 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
Donard, 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
Donard, Ireland
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 5h and 36min
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
Donard, 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
Donard, 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
Donard, 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
Donard, 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).
