September weather forecastKostvlies, Netherlands
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Kostvlies, Netherlands, with an average temperature ranging between min 10.8°C (51.4°F) and max 18.7°C (65.7°F).Temperature
September's onset introduces a mild reduction in the average high-temperature, from a pleasant 22.1°C (71.8°F) in August to a comfortable 18.7°C (65.7°F). During September nights, Kostvlies witnesses a consistent average temperature of 10.8°C (51.4°F).Humidity
In September, the average relative humidity in Kostvlies is 82%.Rainfall
In September, the rain falls for 15.5 days. Throughout September, 27mm (1.06") of precipitation is accumulated. Throughout the year, there are 175.1 rainfall days, and 369mm (14.53") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
In Kostvlies, the average length of the day in September is 12h and 40min.On the first day of September, sunrise is at 06:43 and sunset at 20:21. On the last day of the month, sunrise is at 07:33 and sunset at 19:11 CEST.
Sunshine
In September, the average sunshine is 6.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In September, the maximum UV index of 4 translates into these guidelines:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Kostvlies, Netherlands
- Average high temperature in September: 18.7°C
The warmest month (with the highest average high temperature) is August (22.1°C).
The month with the lowest average high temperature is January (4.1°C).
- Average low temperature in September: 10.8°C
The month with the highest average low temperature is August (13.3°C).
The coldest month (with the lowest average low temperature) is January (0.2°C).
Average pressure in September
Kostvlies, Netherlands
- Average pressure in September: 1016.6mbar
The month with the highest atmospheric pressure is September (1016.6mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).
Average wind speed in September
Kostvlies, Netherlands
- Average wind speed in September: 13.3km/h
The windiest month (with the highest average wind speed) is December (19km/h).
The calmest month (with the lowest average wind speed) is July (12.7km/h).
Average humidity in September
Kostvlies, Netherlands
- Average humidity in September: 82%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Kostvlies, Netherlands
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is June (43mm).
The driest month (with the least rainfall) is April (18mm).
Average rainfall days in September
Kostvlies, Netherlands
- Average rainfall days in September: 15.5 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is February (10.4 days).
Average snowfall in September
Kostvlies, Netherlands
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (25mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Kostvlies, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.4 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
Kostvlies, Netherlands
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 16h and 48min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 6h and 54min
The month with the most sunshine is August (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days in September
Kostvlies, Netherlands
- Average sunshine days in September: 10.9 days
The month with the most sunshine days is March (15.8 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in September
Kostvlies, Netherlands
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Kostvlies, Netherlands
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 70).
The months with the least cloud cover are April and August (Cloud cover 45).
Average visibility in September
Kostvlies, Netherlands
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, July, August, October and December (9km).
The months with the lowest visibility are September and November (8km).
