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 arrival of September corresponds with a minor reduction in the average high-temperature, down from August's moderately hot 23.1°C (73.6°F) to a comfortable 19.2°C (66.6°F). The temperature in Riel dips to an average of 11.3°C (52.3°F) during September nights.Humidity
In Riel, the average relative humidity in September is 79%.Rainfall
In Riel, in September, during 11 rainfall days, 23mm (0.91") of precipitation is typically accumulated. In Riel, during the entire year, the rain falls for 154.3 days and collects up to 321mm (12.64") of precipitation.Snowfall
In Riel, snow does not fall in April through October.Daylight
In Riel, the average length of the day in September is 12h and 38min.On the first day of the month, sunrise is at 06:53 and sunset at 20:26. On the last day of September, in Riel, Netherlands, sunrise is at 07:39 and sunset at 19:19 CEST.
Sunshine
In September, the average sunshine is 7.5h.UV index
In September, the average daily maximum UV index in Riel is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Undertake protective steps - Recommendations to avoid sunburn are issued. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.
Frequently asked questions
What is the average September temperature in Riel?
What is the average humidity in September in Riel?
How much does it rain in Riel in September?
When it does not snow in Riel?
How many hours of daylight does Riel have in September?
When are sunrise and sunset in September in Riel?
How many hours of sunshine does Riel have in September?
What is the UV index reading in September in Riel?
Average temperature in September
Riel, Netherlands
- Average high temperature in September: 19.2°C
The warmest months (with the highest average high temperature) are July and August (23.1°C).
The month with the lowest average high temperature is January (4.9°C).
- Average low temperature in September: 11.3°C
The month with the highest average low temperature is August (14.3°C).
The coldest months (with the lowest average low temperature) are January and February (1.3°C).
Average pressure in September
Riel, 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 (1012.3mbar).
Average wind speed in September
Riel, Netherlands
- Average wind speed in September: 11.6km/h
The windiest month (with the highest average wind speed) is December (17.5km/h).
The calmest month (with the lowest average wind speed) is August (11.3km/h).
Average humidity in September
Riel, Netherlands
- Average humidity in September: 79%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Riel, Netherlands
- Average rainfall in September: 23mm
The wettest months (with the highest rainfall) are July, August and December (32mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in September
Riel, Netherlands
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is July (15.4 days).
The month with the least rainy days is February (10.8 days).
Average snowfall in September
Riel, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (32mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Riel, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.3 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
Riel, Netherlands
- Average daylight in September: 12h and 4min
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 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 24min).
Average sunshine days in September
Riel, Netherlands
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is September (16.4 days).
The month with the least sunshine days is February (12.3 days).
Average UV index in September
Riel, 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
Riel, Netherlands
- Average cloud cover in September: 45
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 42).
Average visibility in September
Riel, 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).
Riel, Netherlands
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