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
September
Weather in September
Temperature
As September unfolds, the average high-temperature reaches a still refreshing 15.3°C (59.5°F), hinting at a slight fluctuation from the previous month. Hollymount records an average low of 9.5°C (49.1°F) throughout the nights in September.Humidity
In Hollymount, Ireland, the average relative humidity in September is 87%.Rainfall
September is the month with the least rainfall in Hollymount. Rain falls for 6 days and accumulates 7mm (0.28") of precipitation.Snowfall
April through November are months without snowfall in Hollymount, Ireland.Daylight
In September, the average length of the day is 12h and 41min.On the first day of September, sunrise is at 6:46 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 7:37 am and sunset at 7:15 pm IST.
Sunshine
In September, the average sunshine is 5h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The daily maximum UV index of 3 in September interprets into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Hollymount have in September?
When is the sunrise / sunset in September?
How many hours of sunshine does Hollymount have in September?
What is the UV index reading in September?
Average temperature in September
Hollymount, Ireland
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (16.9°C).
The month with the lowest average high temperature is January (7.3°C).
- Average low temperature in September: 9.5°C
The month with the highest average low temperature is August (10.9°C).
The coldest month (with the lowest average low temperature) is February (3.2°C).
Average pressure in September
Hollymount, Ireland
- Average pressure in September: 1014.3mbar
The month with the highest atmospheric pressure is May (1015.4mbar).
The month with the lowest atmospheric pressure is November (1007.2mbar).
Average wind speed in September
Hollymount, Ireland
- Average wind speed in September: 15.5km/h
The windiest month (with the highest average wind speed) is January (20.8km/h).
The calmest month (with the lowest average wind speed) is July (13.5km/h).
Average humidity in September
Hollymount, Ireland
- Average humidity in September: 87%
The months with the highest relative humidity are January, October and November (88%).
The month with the lowest relative humidity is April (83%).
Average rainfall in September
Hollymount, Ireland
- Average rainfall in September: 7mm
The wettest month (with the highest rainfall) is August (22mm).
The driest month (with the least rainfall) is September (7mm).
Average rainfall days in September
Hollymount, Ireland
- Average rainfall days in September: 6 days
The months with the highest number of rainy days are June and July (10.6 days).
The month with the least rainy days is September (6 days).
Average snowfall in September
Hollymount, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (5mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Hollymount, Ireland
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.8 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Hollymount, Ireland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 0min).
The month with the shortest days is December (Average daylight: 7h and 30min).
- Average sunshine in September: 5h and 0min
The month with the most sunshine is June (Average sunshine: 7h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Hollymount, Ireland
- Average sunshine days in September: 21.1 days
The month with the most sunshine days is December (21.5 days).
The month with the least sunshine days is July (14.3 days).
Average UV index in September
Hollymount, Ireland
- Average UV index in September: 3
The month with the highest UV index is June (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
Hollymount, Ireland
- Average cloud cover in September: 65
The months with the most cloud cover are July and August (Cloud cover 70).
The month with the least cloud cover is April (Cloud cover 59).
Average visibility in September
Hollymount, Ireland
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (9km).
The months with the lowest visibility are July and August (8km).
