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
September welcomes an average high-temperature of a still refreshing 15.8°C (60.4°F), not much different from the preceding month. September generally records an average low-temperature of 9.3°C (48.7°F).Humidity
The average relative humidity in September is 88%.Rainfall
The month with the least rainfall is September, when the rain falls for 14.9 days and typically collects 33mm (1.3") of precipitation.Snowfall
April through November are months without snowfall.Daylight
In Knockaderry, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 6:47 am and sunset at 8:23 pm. On the last day of September, sunrise is at 7:36 am and sunset at 7:15 pm IST.
Sunshine
The average sunshine in September in Knockaderry, Ireland, is 5.6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 3 suggests this advice:
Exercise prevention - Precautions against solar damage are endorsed. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Knockaderry in September?
What is the average humidity in September in Knockaderry?
What is the driest month in Knockaderry?
How much does it rain in Knockaderry in September?
When it does not snow in Knockaderry?
How many hours of daylight does Knockaderry have in September?
When is the sunrise / sunset in September in Knockaderry?
How many hours of sunshine does Knockaderry have in September?
What is the UV index reading in September in Knockaderry?
Average temperature in September
Knockaderry, Ireland
- Average high temperature in September: 15.8°C
The warmest month (with the highest average high temperature) is July (18°C).
The month with the lowest average high temperature is January (7.8°C).
- Average low temperature in September: 9.3°C
The month with the highest average low temperature is July (11.1°C).
The coldest months (with the lowest average low temperature) are February and March (2.9°C).
Average pressure in September
Knockaderry, 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
Knockaderry, Ireland
- Average wind speed in September: 14.5km/h
The windiest month (with the highest average wind speed) is February (19km/h).
The calmest month (with the lowest average wind speed) is July (13.3km/h).
Average humidity in September
Knockaderry, Ireland
- Average humidity in September: 88%
The months with the highest relative humidity are November and December (90%).
The month with the lowest relative humidity is April (84%).
Average rainfall in September
Knockaderry, Ireland
- Average rainfall in September: 33mm
The wettest month (with the highest rainfall) is December (56mm).
The driest month (with the least rainfall) is September (33mm).
Average rainfall days in September
Knockaderry, Ireland
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is August (20.4 days).
The month with the least rainy days is February (14.8 days).
Average snowfall in September
Knockaderry, Ireland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (21mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Knockaderry, Ireland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (0.9 days).
The months with the least snowfall days are May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Knockaderry, 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 4min
The month with the most sunshine is June (Average sunshine: 7h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 0min).
Average sunshine days in September
Knockaderry, Ireland
- Average sunshine days in September: 11.4 days
The month with the most sunshine days is December (12.6 days).
The month with the least sunshine days is July (7.6 days).
Average UV index in September
Knockaderry, 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
Knockaderry, Ireland
- Average cloud cover in September: 62
The month with the most cloud cover is July (Cloud cover 67).
The month with the least cloud cover is April (Cloud cover 56).
Average visibility in September
Knockaderry, Ireland
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, November and December (9km).
The months with the lowest visibility are May, June, July, August, September and October (8km).
