Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The commencement of September records an average high-temperature of a refreshing 17.6°C (63.7°F), barely varying from August's 20.3°C (68.5°F). September nights witness a slight temperature decrease, averaging at a mild 13.4°C (56.1°F).Humidity
In Grou, the average relative humidity in September is 80%.Rainfall
In September, the rain falls for 17.3 days. Throughout September, 41mm (1.61") of precipitation is accumulated. In Grou, during the entire year, the rain falls for 188.1 days and collects up to 390mm (15.35") of precipitation.Snowfall
April through October are months without snowfall in Grou.Daylight
In Grou, the average length of the day in September is 12h and 40min.On the first day of the month, sunrise is at 06:47 and sunset at 20:25. On the last day of September, in Grou, sunrise is at 07:37 and sunset at 19:15 CEST.
Sunshine
The average sunshine in September in Grou is 7.3h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 suggests these recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Frequently asked questions
What is the temperature in September in Grou?
What is the average humidity in September in Grou?
How many days does it rain in September in Grou?
When it does not snow in Grou?
What is the average length of the day in September in Grou?
What time are sunrise and sunset in September in Grou?
How long on average sun shines in September in Grou?
What is the UV index intensity in September in Grou?
Average temperature in September
Grou, Netherlands
- Average high temperature in September: 17.6°C
The warmest month (with the highest average high temperature) is August (20.3°C).
The months with the lowest average high temperature are January and February (5.3°C).
- Average low temperature in September: 13.4°C
The month with the highest average low temperature is August (15.2°C).
The coldest month (with the lowest average low temperature) is February (2.3°C).
Average pressure in September
Grou, Netherlands
- Average pressure in September: 1016.2mbar
The month with the highest atmospheric pressure is May (1016.4mbar).
The month with the lowest atmospheric pressure is November (1010.7mbar).
Average wind speed in September
Grou, Netherlands
- Average wind speed in September: 19.3km/h
The windiest month (with the highest average wind speed) is December (26.8km/h).
The calmest month (with the lowest average wind speed) is July (17.2km/h).
Average humidity in September
Grou, Netherlands
- Average humidity in September: 80%
The month with the highest relative humidity is December (85%).
The months with the lowest relative humidity are April, May and August (79%).
Average rainfall in September
Grou, Netherlands
- Average rainfall in September: 41mm
The wettest month (with the highest rainfall) is August (46mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in September
Grou, Netherlands
- Average rainfall days in September: 17.3 days
The month with the highest number of rainy days is December (18.8 days).
The month with the least rainy days is April (11.1 days).
Average snowfall in September
Grou, Netherlands
- Average snowfall in September: 0mm
The months with the highest snowfall are January and February (15mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Grou, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.1 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
Grou, Netherlands
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 54min).
The month with the shortest days is December (Average daylight: 7h and 42min).
- Average sunshine in September: 7h and 2min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in September
Grou, Netherlands
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is March (16.7 days).
The month with the least sunshine days is December (7.1 days).
Average UV index in September
Grou, Netherlands
- Average UV index in September: 4
The month with the highest UV index is 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
Grou, Netherlands
- Average cloud cover in September: 46
The month with the most cloud cover is December (Cloud cover 67).
The months with the least cloud cover are April and August (Cloud cover 39).
Average visibility in September
Grou, Netherlands
- Average visibility in September: 10km
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (10km).
The months with the lowest visibility are January and December (9km).
Grou, Netherlands
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