September weather forecastAmersfoort, Netherlands
September
Weather in September
September introduces Sol’s retreat, with a decrease in daylight hours and an introduction to cooler temperatures. Despite these changes, the climate remains comfortable, welcoming the beginning of autumn in Amersfoort. As the month progresses, daylight diminishes and autumnal hues adorn the city's landscape. Although the weather turns a bit nippy, the consistent pressure contributes to the comfortable ambiance. Brace for a medley of warm and cold, as September embraces transitional weather.Temperature
The beginning of September in Amersfoort brings a minor change in the average high-temperature, shifting from a pleasant 22.1°C (71.8°F) in August to a refreshing 18.7°C (65.7°F). Amersfoort, during September nights, observes an average temperature of 11.5°C (52.7°F).Humidity
In Amersfoort, the average relative humidity in September is 81%.Rainfall
In Amersfoort, during September, the rain falls for 12 days and regularly aggregates up to 25mm (0.98") of precipitation. In Amersfoort, Netherlands, during the entire year, the rain falls for 173.5 days and collects up to 441mm (17.36") of precipitation.Snowfall
In Amersfoort, Netherlands, snow does not fall in April through October.Daylight
The average length of the day in September is 12h and 39min.On the first day of September in Amersfoort, sunrise is at 06:50 and sunset at 20:25. On the last day of the month, sunrise is at 07:38 and sunset at 19:17 CEST.
Sunshine
In September, the average sunshine is 7.4h.UV index
In September, the average daily maximum UV index in Amersfoort, Netherlands, is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Amersfoort, 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 (4.9°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
Amersfoort, 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 (1011.6mbar).
Average wind speed in September
Amersfoort, Netherlands
- Average wind speed in September: 12.4km/h
The windiest month (with the highest average wind speed) is December (18.2km/h).
The calmest months (with the lowest average wind speed) are July and August (12km/h).
Average humidity in September
Amersfoort, 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
Amersfoort, Netherlands
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is December (45mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Amersfoort, Netherlands
- Average rainfall days in September: 12 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is September (12 days).
Average snowfall in September
Amersfoort, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (29mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Amersfoort, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Amersfoort, 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 24min
The months with the most sunshine are June and July (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Amersfoort, Netherlands
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is October (16.5 days).
The month with the least sunshine days is February (11.7 days).
Average UV index in September
Amersfoort, 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
Amersfoort, 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 41).
Average visibility in September
Amersfoort, 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).
