September weather forecastGraswijk, Netherlands
September
Weather in September
September, the first month of the autumn in Graswijk, is still a refreshing month, with an average temperature ranging between max 18.5°C (65.3°F) and min 10.7°C (51.3°F).Temperature
Graswijk observes a small decrease in the average high-temperature with the arrival of September, falling from August's pleasant 21.9°C (71.4°F) to a refreshing 18.5°C (65.3°F). In September, Graswijk's temperature tends to fall to an average low of 10.7°C (51.3°F) during the night.Humidity
In September, the average relative humidity in Graswijk, Netherlands, is 83%.Rainfall
In Graswijk, in September, during 11.1 rainfall days, 27mm (1.06") of precipitation is typically accumulated. In Graswijk, during the entire year, the rain falls for 176.6 days and collects up to 457mm (17.99") of precipitation.Snowfall
May through October are months without snowfall in Graswijk.Daylight
The average length of the day in September in Graswijk is 12h and 40min.On the first day of the month, sunrise is at 06:44 and sunset at 20:22. On the last day of September, in Graswijk, sunrise is at 07:34 and sunset at 19:12 CEST.
Sunshine
In September, the average sunshine in Graswijk is 6.9h.UV index
The average daily maximum UV index in September in Graswijk is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Graswijk, Netherlands
- Average high temperature in September: 18.5°C
The warmest month (with the highest average high temperature) is August (21.9°C).
The month with the lowest average high temperature is January (4.3°C).
- Average low temperature in September: 10.7°C
The month with the highest average low temperature is August (13.2°C).
The coldest month (with the lowest average low temperature) is February (0.5°C).
Average pressure in September
Graswijk, Netherlands
- Average pressure in September: 1016.5mbar
The month with the highest atmospheric pressure is September (1016.5mbar).
The month with the lowest atmospheric pressure is November (1011.2mbar).
Average wind speed in September
Graswijk, Netherlands
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is December (18.9km/h).
The calmest months (with the lowest average wind speed) are July and August (12.7km/h).
Average humidity in September
Graswijk, Netherlands
- Average humidity in September: 83%
The month with the highest relative humidity is December (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Graswijk, Netherlands
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (25mm).
Average rainfall days in September
Graswijk, Netherlands
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is September (11.1 days).
Average snowfall in September
Graswijk, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (31mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Graswijk, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.5 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
Graswijk, 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 months with the most sunshine are July and August (Average sunshine: 8h and 30min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Graswijk, Netherlands
- Average sunshine days in September: 16.7 days
The months with the most sunshine days are September and October (16.7 days).
The month with the least sunshine days is July (10.3 days).
Average UV index in September
Graswijk, 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
Graswijk, Netherlands
- Average cloud cover in September: 51
The month with the most cloud cover is December (Cloud cover 71).
The month with the least cloud cover is April (Cloud cover 44).
Average visibility in September
Graswijk, 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).
