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
Leidschendam's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's pleasant 21.1°C (70°F) to a refreshing 18.1°C (64.6°F). In Leidschendam, September's low temperatures hover around a mild 13.8°C (56.8°F), reflecting a minor decrease from the daytime highs.Humidity
The average relative humidity in September is 77%.Rainfall
In Leidschendam, during September, the rain falls for 16.8 days and regularly aggregates up to 51mm (2.01") of precipitation. Throughout the year, there are 198.4 rainfall days, and 554mm (21.81") of precipitation is accumulated.Snowfall
In Leidschendam, snow does not fall in May through October.Daylight
In September, the average length of the day in Leidschendam is 12h and 39min.On the first day of the month, sunrise is at 06:55 and sunset at 20:29. On the last day of September, in Leidschendam, sunrise is at 07:42 and sunset at 19:21 CEST.
Sunshine
The average sunshine in September in Leidschendam is 7.2h.UV index
The average daily maximum UV index in September in Leidschendam is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: A maximum high UV index of 4 in September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Leidschendam?
What is the average humidity in September in Leidschendam?
How much does it rain in Leidschendam in September?
When it does not snow in Leidschendam?
What is the average length of the day in September in Leidschendam?
When are sunrise and sunset in September in Leidschendam?
How long on average sun shines in September in Leidschendam?
What is the UV index intensity in September in Leidschendam?
Average temperature in September
Leidschendam, Netherlands
- Average high temperature in September: 18.1°C
The warmest month (with the highest average high temperature) is August (21.1°C).
The month with the lowest average high temperature is January (5.9°C).
- Average low temperature in September: 13.8°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (2.9°C).
Average pressure in September
Leidschendam, Netherlands
- Average pressure in September: 1016.9mbar
The month with the highest atmospheric pressure is September (1016.9mbar).
The month with the lowest atmospheric pressure is November (1011.2mbar).
Average wind speed in September
Leidschendam, Netherlands
- Average wind speed in September: 17.7km/h
The windiest month (with the highest average wind speed) is December (24.9km/h).
The calmest month (with the lowest average wind speed) is July (16.2km/h).
Average humidity in September
Leidschendam, Netherlands
- Average humidity in September: 77%
The months with the highest relative humidity are January and December (83%).
The months with the lowest relative humidity are April and August (75%).
Average rainfall in September
Leidschendam, Netherlands
- Average rainfall in September: 51mm
The wettest month (with the highest rainfall) is August (65mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Leidschendam, Netherlands
- Average rainfall days in September: 16.8 days
The months with the highest number of rainy days are August and December (19.8 days).
The month with the least rainy days is April (12.3 days).
Average snowfall in September
Leidschendam, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (24mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Leidschendam, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 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
Leidschendam, Netherlands
- 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: 7h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 30min).
Average sunshine days in September
Leidschendam, Netherlands
- Average sunshine days in September: 10 days
The month with the most sunshine days is April (15.8 days).
The month with the least sunshine days is December (7.1 days).
Average UV index in September
Leidschendam, Netherlands
- 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
Leidschendam, Netherlands
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Leidschendam, Netherlands
- Average visibility in September: 10km
The months with the highest visibility are March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January, February and December (9km).
