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
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a pleasant 22.3°C (72.1°F) in August to a comfortable 18.6°C (65.5°F). In the month of September, the temperature generally rests at an average low of 10.9°C (51.6°F).Humidity
In September, the average relative humidity in Welsum, Netherlands, is 83%.Rainfall
In Welsum, in September, during 8.7 rainfall days, 12mm (0.47") of precipitation is typically accumulated. Throughout the year, there are 131.6 rainfall days, and 193mm (7.6") of precipitation is accumulated.Snowfall
In Welsum, snow does not fall in April through October.Daylight
In Welsum, Netherlands, the average length of the day in September is 12h and 40min.On the first day of September in Welsum, sunrise is at 06:47 and sunset at 20:23. On the last day of the month, sunrise is at 07:35 and sunset at 19:14 CEST.
Sunshine
The average sunshine in September is 7.5h.UV index
In September, the average daily maximum UV index in Welsum is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Take necessary precautions - Defending against sun damage is advocated. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
What is the temperature in September in Welsum?
What is the average humidity in September in Welsum?
How much does it rain in Welsum in September?
When it does not snow in Welsum?
What is the average length of the day in September in Welsum?
What time are sunrise and sunset in September in Welsum?
How many hours of sunshine does Welsum have in September?
How high is the UV index in September in Welsum?
Average temperature in September
Welsum, Netherlands
- Average high temperature in September: 18.6°C
The warmest month (with the highest average high temperature) is August (22.3°C).
The month with the lowest average high temperature is January (4.4°C).
- Average low temperature in September: 10.9°C
The month with the highest average low temperature is August (13.5°C).
The coldest month (with the lowest average low temperature) is January (0.7°C).
Average pressure in September
Welsum, Netherlands
- Average pressure in September: 1017mbar
The month with the highest atmospheric pressure is September (1017mbar).
The month with the lowest atmospheric pressure is November (1011.8mbar).
Average wind speed in September
Welsum, Netherlands
- Average wind speed in September: 12.2km/h
The windiest month (with the highest average wind speed) is December (18.1km/h).
The calmest months (with the lowest average wind speed) are July and August (11.9km/h).
Average humidity in September
Welsum, 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 (75%).
Average rainfall in September
Welsum, Netherlands
- Average rainfall in September: 12mm
The wettest month (with the highest rainfall) is June (24mm).
The driest month (with the least rainfall) is April (11mm).
Average rainfall days in September
Welsum, Netherlands
- Average rainfall days in September: 8.7 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is September (8.7 days).
Average snowfall in September
Welsum, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is January (9mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Welsum, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.7 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
Welsum, Netherlands
- Average daylight in September: 12h and 4min
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 3min
The month with the most sunshine is August (Average sunshine: 9h and 6min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Welsum, Netherlands
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is October (18.7 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in September
Welsum, 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
Welsum, Netherlands
- Average cloud cover in September: 45
The month with the most cloud cover is December (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 41).
Average visibility in September
Welsum, Netherlands
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, July, August, October, November and December (9km).
The month with the lowest visibility is September (8km).
Welsum, Netherlands
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