September weather forecastDe Bilt, Netherlands
September
Weather in September
The first month of the autumn, September, is still a comfortable month in De Bilt, Netherlands, with an average temperature varying between 18.7°C (65.7°F) and 11.5°C (52.7°F).Temperature
In De Bilt, entering September brings a subtle temperature decrement, reducing from August's pleasant 22.1°C (71.8°F) to a comfortable 18.7°C (65.7°F). The nights of September anticipate an average low-temperature of 11.5°C (52.7°F).Humidity
In September, the average relative humidity in De Bilt is 81%.Rainfall
In De Bilt, Netherlands, in September, during 7.9 rainfall days, 10mm (0.39") of precipitation is typically accumulated. Throughout the year, in De Bilt, there are 116.8 rainfall days, and 163mm (6.42") of precipitation is accumulated.Snowfall
In De Bilt, snow does not fall in March through November.Daylight
In De Bilt, the average length of the day in September is 12h and 39min.On the first day of the month, sunrise is at 06:51 and sunset at 20:26. On the last day of September, sunrise is at 07:39 and sunset at 19:18 CEST.
Sunshine
The average sunshine in September is 7.3h.UV index
In September, the average daily maximum UV index in De Bilt is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Be vigilant - Preventing sunburn is recommended. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
De Bilt, Netherlands
- Average high temperature in September: 18.7°C
The warmest months (with the highest average high temperature) are July and August (22.1°C).
The month with the lowest average high temperature is January (5.1°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is February (1.4°C).
Average pressure in September
De Bilt, 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 (1011.5mbar).
Average wind speed in September
De Bilt, Netherlands
- Average wind speed in September: 12.3km/h
The windiest month (with the highest average wind speed) is December (17.9km/h).
The calmest month (with the lowest average wind speed) is August (11.9km/h).
Average humidity in September
De Bilt, Netherlands
- Average humidity in September: 81%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
De Bilt, Netherlands
- Average rainfall in September: 10mm
The wettest months (with the highest rainfall) are June and July (19mm).
The driest month (with the least rainfall) is April (8mm).
Average rainfall days in September
De Bilt, Netherlands
- Average rainfall days in September: 7.9 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is October (7.3 days).
Average snowfall in September
De Bilt, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (12mm).
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
De Bilt, 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
De Bilt, 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 18min
The month with the most sunshine is July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
De Bilt, Netherlands
- Average sunshine days in September: 18 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (12.7 days).
Average UV index in September
De Bilt, 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
De Bilt, Netherlands
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 65).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in September
De Bilt, Netherlands
- 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).
