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 takes its course, Greencastle's average high-temperature registers at a still refreshing 58.6°F, closely aligning with the preceding month. During September, Greencastle's temperature averages to a chilly 48.6°F at night.Humidity
The average relative humidity in September is 87%.Rainfall
September is the month with the least rainfall. Rain falls for 16.1 days and accumulates 1.14" of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Greencastle, the average length of the day in September is 12h and 43min.On the first day of the month, sunrise is at 6:35 am and sunset at 8:20 pm. On the last day of September, in Greencastle, Ireland, sunrise is at 7:29 am and sunset at 7:05 pm IST.
Sunshine
In September, the average sunshine is 5.1h.UV index
In Greencastle, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index, 3 during September, leads to the following recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Greencastle?
What is the average humidity in September in Greencastle?
What is the driest month in Greencastle?
How many days does it rain in September in Greencastle?
When it does not snow in Greencastle?
How many hours of daylight does Greencastle have in September?
When are sunrise and sunset in September in Greencastle?
How many hours of sunshine does Greencastle have in September?
How high is the UV index in September in Greencastle?
Average temperature in September
Greencastle, Ireland
- Average high temperature in September: 58.6°F
The warmest month (with the highest average high temperature) is July (61.7°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in September: 48.6°F
The month with the highest average low temperature is August (50.7°F).
The coldest month (with the lowest average low temperature) is February (36.1°F).
Average pressure in September
Greencastle, Ireland
- Average pressure in September: 29.93"Hg
The month with the highest atmospheric pressure is May (29.98"Hg).
The month with the lowest atmospheric pressure is November (29.72"Hg).
Average wind speed in September
Greencastle, Ireland
- Average wind speed in September: 10.5mph
The windiest month (with the highest average wind speed) is January (13.6mph).
The calmest month (with the lowest average wind speed) is July (8.6mph).
Average humidity in September
Greencastle, Ireland
- Average humidity in September: 87%
The months with the highest relative humidity are January, August and December (88%).
The month with the lowest relative humidity is April (82%).
Average rainfall in September
Greencastle, Ireland
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is August (2.36").
The driest month (with the least rainfall) is September (1.14").
Average rainfall days in September
Greencastle, Ireland
- Average rainfall days in September: 16.1 days
The month with the highest number of rainy days is August (21.5 days).
The month with the least rainy days is April (15.7 days).
Average snowfall in September
Greencastle, Ireland
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.83").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Greencastle, 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 April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Greencastle, Ireland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 18min).
The month with the shortest days is December (Average daylight: 7h and 12min).
- Average sunshine in September: 5h and 1min
The month with the most sunshine is June (Average sunshine: 6h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Greencastle, Ireland
- Average sunshine days in September: 9.9 days
The month with the most sunshine days is April (11.1 days).
The month with the least sunshine days is August (6.3 days).
Average UV index in September
Greencastle, Ireland
- Average UV index in September: 3
The months with the highest UV index are May and 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
Greencastle, Ireland
- Average cloud cover in September: 64
The month with the most cloud cover is July (Cloud cover 68).
The month with the least cloud cover is April (Cloud cover 58).
Average visibility in September
Greencastle, Ireland
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
