September weather forecastGroot Valkenisse, Netherlands
September
Weather in September
September, the first month of the autumn in Groot Valkenisse, is still a comfortable month, with an average temperature fluctuating between 14.2°C (57.6°F) and 18.4°C (65.1°F).Temperature
Groot Valkenisse starts September with an average high-temperature of a refreshing 18.4°C (65.1°F), a minor shift from August's 20.8°C (69.4°F). In Groot Valkenisse, September nights experience a modest descent in temperature from daily peaks, cooling down to an average of 14.2°C (57.6°F).Humidity
April, August and September, with an average relative humidity of 76%, are the least humid months.Rainfall
In September, the rain falls for 15.8 days. Throughout September, 49mm (1.93") of precipitation is accumulated. In Groot Valkenisse, during the entire year, the rain falls for 198.8 days and collects up to 634mm (24.96") of precipitation.Snowfall
April through October are months without snowfall in Groot Valkenisse.Daylight
In Groot Valkenisse, Netherlands, the average length of the day in September is 12h and 38min.On the first day of September, sunrise is at 06:59 and sunset at 20:32. On the last day of the month, sunrise is at 07:45 and sunset at 19:25 CEST.
Sunshine
The average sunshine in September is 7.2h.UV index
In September, the average daily maximum UV index in Groot Valkenisse is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Groot Valkenisse, Netherlands
- Average high temperature in September: 18.4°C
The warmest month (with the highest average high temperature) is August (20.8°C).
The month with the lowest average high temperature is January (6.3°C).
- Average low temperature in September: 14.2°C
The month with the highest average low temperature is August (16.2°C).
The coldest months (with the lowest average low temperature) are January and February (3.4°C).
Average pressure in September
Groot Valkenisse, Netherlands
- Average pressure in September: 1017.2mbar
The month with the highest atmospheric pressure is September (1017.2mbar).
The month with the lowest atmospheric pressure is November (1011.6mbar).
Average wind speed in September
Groot Valkenisse, Netherlands
- Average wind speed in September: 18.5km/h
The windiest month (with the highest average wind speed) is December (25.1km/h).
The calmest months (with the lowest average wind speed) are April and July (16.7km/h).
Average humidity in September
Groot Valkenisse, Netherlands
- Average humidity in September: 76%
The months with the highest relative humidity are January and December (83%).
The months with the lowest relative humidity are April, August and September (76%).
Average rainfall in September
Groot Valkenisse, Netherlands
- Average rainfall in September: 49mm
The wettest month (with the highest rainfall) is August (73mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Groot Valkenisse, Netherlands
- Average rainfall days in September: 15.8 days
The month with the highest number of rainy days is December (19.3 days).
The month with the least rainy days is April (12.8 days).
Average snowfall in September
Groot Valkenisse, Netherlands
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (20mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Groot Valkenisse, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3 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
Groot Valkenisse, Netherlands
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).
- Average sunshine in September: 7h and 12min
The month with the most sunshine is June (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 42min).
Average sunshine days in September
Groot Valkenisse, Netherlands
- Average sunshine days in September: 10.3 days
The month with the most sunshine days is March (14.7 days).
The month with the least sunshine days is December (7.2 days).
Average UV index in September
Groot Valkenisse, 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 and December (UV index 2).
Average cloud cover in September
Groot Valkenisse, Netherlands
- Average cloud cover in September: 43
The month with the most cloud cover is December (Cloud cover 64).
The months with the least cloud cover are April and August (Cloud cover 39).
Average visibility in September
Groot Valkenisse, 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).
