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
The start of September sees the average high-temperature at a moderate 14.8°C (58.6°F), showing little difference from August's 16.4°C (61.5°F). Rathfriland records a negligible downturn from daytime temperatures, averaging a low of 10.3°C (50.5°F) in the month of September.Humidity
In September, the average relative humidity in Rathfriland, United Kingdom, is 87%.Rainfall
In Rathfriland, during September, the rain falls for 15.6 days and regularly aggregates up to 38mm (1.5") of precipitation. Throughout the year, there are 199.5 rainfall days, and 567mm (22.32") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Daylight
In Rathfriland, the average length of the day in September is 12h and 42min.On the first day of the month, sunrise is at 6:33 am and sunset at 8:15 pm. On the last day of September, sunrise is at 7:25 am and sunset at 7:02 pm BST.
Sunshine
In Rathfriland, United Kingdom, the average sunshine in September is 6.2h.UV index
May, June, August and September, with an average maximum UV index of 4, are months with the highest UV index. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The daily high UV index of 4 in September translates into this advice:
Guard yourself - Precautionary measures against sun damage are advocated. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Rathfriland?
What is the average humidity in September in Rathfriland?
How much does it rain in Rathfriland in September?
When it does not snow in Rathfriland?
What is the average length of the day in September in Rathfriland?
What time are sunrise and sunset in September in Rathfriland?
How long on average sun shines in September in Rathfriland?
What are the months with the highest UV index in Rathfriland?
How high is the UV index in September in Rathfriland?
Average temperature in September
Rathfriland, United Kingdom
- Average high temperature in September: 14.8°C
The warmest months (with the highest average high temperature) are July and August (16.4°C).
The month with the lowest average high temperature is January (6.7°C).
- Average low temperature in September: 10.3°C
The month with the highest average low temperature is August (11.5°C).
The coldest month (with the lowest average low temperature) is February (3.1°C).
Average pressure in September
Rathfriland, United Kingdom
- Average pressure in September: 1014.6mbar
The month with the highest atmospheric pressure is May (1015.7mbar).
The month with the lowest atmospheric pressure is November (1007.6mbar).
Average wind speed in September
Rathfriland, United Kingdom
- Average wind speed in September: 17.3km/h
The windiest month (with the highest average wind speed) is January (22.8km/h).
The calmest months (with the lowest average wind speed) are June and July (14.2km/h).
Average humidity in September
Rathfriland, United Kingdom
- Average humidity in September: 87%
The month with the highest relative humidity is December (88%).
The months with the lowest relative humidity are March, April and May (84%).
Average rainfall in September
Rathfriland, United Kingdom
- Average rainfall in September: 38mm
The wettest month (with the highest rainfall) is August (66mm).
The driest months (with the least rainfall) are January and April (35mm).
Average rainfall days in September
Rathfriland, United Kingdom
- Average rainfall days in September: 15.6 days
The month with the highest number of rainy days is August (21.6 days).
The month with the least rainy days is February (13.5 days).
Average snowfall in September
Rathfriland, United Kingdom
- Average snowfall in September: 0mm
The month with the highest snowfall is February (40mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Rathfriland, United Kingdom
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.7 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
Rathfriland, United Kingdom
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 24min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is June (Average sunshine: 7h and 36min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).
Average sunshine days in September
Rathfriland, United Kingdom
- Average sunshine days in September: 9.8 days
The months with the most sunshine days are January and November (12 days).
The month with the least sunshine days is August (6.1 days).
Average UV index in September
Rathfriland, United Kingdom
- Average UV index in September: 4
The months with the highest UV index are May, June, 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
Rathfriland, United Kingdom
- Average cloud cover in September: 56
The months with the most cloud cover are January and February (Cloud cover 61).
The month with the least cloud cover is April (Cloud cover 52).
Average visibility in September
Rathfriland, United Kingdom
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
