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's arrival coincides with a soft drop in the average high-temperature, subtly decreasing from August's warm 23.3°C (73.9°F) to an agreeable 20°C (68°F). Lannoy's average low-temperature for the month of September records at a cool 11.4°C (52.5°F).Humidity
In September, the average relative humidity in Lannoy is 77%.Rainfall
The month with the least rainfall is September, when the rain falls for 10.3 days and typically collects 20mm (0.79") of precipitation.Snowfall
In Lannoy, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 37min.On the first day of September, sunrise is at 07:02 and sunset at 20:31. On the last day of the month, sunrise is at 07:46 and sunset at 19:27 CEST.
Sunshine
In September, the average sunshine is 7.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Heed the precautions - It is counselled to guard against solar damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
How many hours of daylight does Lannoy have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Lannoy have in September?
How high is the UV index in September?
Average temperature in September
Lannoy, Belgium
- Average high temperature in September: 20°C
The warmest month (with the highest average high temperature) is August (23.3°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in September: 11.4°C
The month with the highest average low temperature is August (13.8°C).
The coldest month (with the lowest average low temperature) is January (1.2°C).
Average pressure in September
Lannoy, Belgium
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1012.3mbar).
Average wind speed in September
Lannoy, Belgium
- Average wind speed in September: 12.3km/h
The windiest month (with the highest average wind speed) is December (17.8km/h).
The calmest month (with the lowest average wind speed) is August (11.9km/h).
Average humidity in September
Lannoy, Belgium
- Average humidity in September: 77%
The months with the highest relative humidity are January and December (87%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Lannoy, Belgium
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is December (63mm).
The driest month (with the least rainfall) is September (20mm).
Average rainfall days in September
Lannoy, Belgium
- Average rainfall days in September: 10.3 days
The month with the highest number of rainy days is December (17.9 days).
The month with the least rainy days is September (10.3 days).
Average snowfall in September
Lannoy, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is January (36mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Lannoy, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.9 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
Lannoy, Belgium
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 24min).
The month with the shortest days is December (Average daylight: 8h and 6min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 48min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in September
Lannoy, Belgium
- Average sunshine days in September: 17.7 days
The month with the most sunshine days is September (17.7 days).
The months with the least sunshine days are January, February and December (8.8 days).
Average UV index in September
Lannoy, Belgium
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Lannoy, Belgium
- Average cloud cover in September: 42
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are April and August (Cloud cover 41).
Average visibility in September
Lannoy, Belgium
- 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).
