September weather forecastSluipwijk, Netherlands
September
Weather in September
September, the first month of the autumn in Sluipwijk, is also an enjoyable month, with an average temperature varying between 12.8°C (55°F) and 18.7°C (65.7°F).Temperature
The average high-temperature slightly decreases in September, shifting from a pleasant 22°C (71.6°F) in August to a comfortable 18.7°C (65.7°F). Sluipwijk's temperature drops to an average low of 12.8°C (55°F) during the nights of September.Humidity
In September, the average relative humidity is 78%.Rainfall
In Sluipwijk, in September, it is raining for 9.4 days, with typically 13mm (0.51") of accumulated precipitation. In Sluipwijk, during the entire year, the rain falls for 130.3 days and collects up to 205mm (8.07") of precipitation.Snowfall
In Sluipwijk, snow does not fall in April through October.Daylight
The average length of the day in September in Sluipwijk is 12h and 39min.On the first day of the month, sunrise is at 06:53 and sunset at 20:28. On the last day of September, in Sluipwijk, sunrise is at 07:41 and sunset at 19:20 CEST.
Sunshine
In September, the average sunshine is 7.1h.UV index
The average daily maximum UV index in September in Sluipwijk is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 4 during September translates into the following guidance:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. 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
Sluipwijk, Netherlands
- Average high temperature in September: 18.7°C
The warmest months (with the highest average high temperature) are July and August (22°C).
The month with the lowest average high temperature is January (5.6°C).
- Average low temperature in September: 12.8°C
The month with the highest average low temperature is August (15.3°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Sluipwijk, Netherlands
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1011.4mbar).
Average wind speed in September
Sluipwijk, Netherlands
- Average wind speed in September: 14km/h
The windiest month (with the highest average wind speed) is December (20.2km/h).
The calmest months (with the lowest average wind speed) are July and August (13.6km/h).
Average humidity in September
Sluipwijk, Netherlands
- Average humidity in September: 78%
The month with the highest relative humidity is December (85%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Sluipwijk, Netherlands
- Average rainfall in September: 13mm
The wettest month (with the highest rainfall) is June (24mm).
The driest month (with the least rainfall) is April (9mm).
Average rainfall days in September
Sluipwijk, Netherlands
- Average rainfall days in September: 9.4 days
The month with the highest number of rainy days is July (13.8 days).
The month with the least rainy days is February (8.5 days).
Average snowfall in September
Sluipwijk, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Sluipwijk, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.2 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
Sluipwijk, Netherlands
- Average daylight in September: 12h and 42min
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 6min
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 30min).
Average sunshine days in September
Sluipwijk, Netherlands
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is April (17.5 days).
The month with the least sunshine days is July (13 days).
Average UV index in September
Sluipwijk, 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
Sluipwijk, Netherlands
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 40).
Average visibility in September
Sluipwijk, Netherlands
- Average visibility in September: 9km
The months with the highest visibility are April, May, June and August (10km).
The months with the lowest visibility are January, February, March, July, September, October, November and December (9km).
