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 commencement of September records an average high-temperature of a moderate 15.7°C (60.3°F), barely varying from August's 17.3°C (63.1°F). Nighttime temperatures consistently average a frosty 8.5°C (47.3°F) during September.Humidity
In September, the average relative humidity in Knocklong is 90%.Rainfall
In Knocklong, Ireland, during September, the rain falls for 10.4 days and regularly aggregates up to 19mm (0.75") of precipitation. Throughout the year, in Knocklong, there are 148.4 rainfall days, and 306mm (12.05") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 40min.On the first day of the month, sunrise is at 6:45 am and sunset at 8:21 pm. On the last day of September, in Knocklong, sunrise is at 7:34 am and sunset at 7:12 pm IST.
Sunshine
The average sunshine in September in Knocklong, Ireland, is 5.4h.UV index
In Knocklong, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Knocklong in September?
What is the average humidity in September in Knocklong?
How much does it rain in Knocklong in September?
When it does not snow in Knocklong?
What is the average length of the day in September in Knocklong?
When are sunrise and sunset in September in Knocklong?
How many hours of sunshine does Knocklong have in September?
How high is the UV index in September in Knocklong?
Average temperature in September
Knocklong, Ireland
- Average high temperature in September: 15.7°C
The warmest month (with the highest average high temperature) is July (17.9°C).
The month with the lowest average high temperature is January (7.2°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (10.5°C).
The coldest months (with the lowest average low temperature) are February and March (1.8°C).
Average pressure in September
Knocklong, Ireland
- Average pressure in September: 1015.8mbar
The month with the highest atmospheric pressure is May (1016.2mbar).
The month with the lowest atmospheric pressure is November (1008.6mbar).
Average wind speed in September
Knocklong, Ireland
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is February (18.3km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in September
Knocklong, Ireland
- Average humidity in September: 90%
The months with the highest relative humidity are November and December (92%).
The month with the lowest relative humidity is April (86%).
Average rainfall in September
Knocklong, Ireland
- Average rainfall in September: 19mm
The wettest month (with the highest rainfall) is November (36mm).
The driest month (with the least rainfall) is January (18mm).
Average rainfall days in September
Knocklong, Ireland
- Average rainfall days in September: 10.4 days
The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (10.3 days).
Average snowfall in September
Knocklong, Ireland
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (11mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Knocklong, Ireland
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.8 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
Knocklong, Ireland
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is June (Average sunshine: 5h and 54min).
The month with the least sunshine is November (Average sunshine: 3h and 42min).
Average sunshine days in September
Knocklong, Ireland
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is December (17.4 days).
The month with the least sunshine days is July (9.4 days).
Average UV index in September
Knocklong, 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
Knocklong, Ireland
- Average cloud cover in September: 65
The month with the most cloud cover is July (Cloud cover 71).
The month with the least cloud cover is April (Cloud cover 60).
Average visibility in September
Knocklong, Ireland
- Average visibility in September: 7km
The month with the highest visibility is February (9km).
The months with the lowest visibility are July, August and September (7km).
