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
September
Weather in September
Temperature
A modest decline in the average high-temperature is seen during September, decreasing from a warm 23.2°C (73.8°F) in August to a refreshing 19.4°C (66.9°F). Posterholt reports a consistent average low-temperature of 11.1°C (52°F) throughout September nights.Humidity
In Posterholt, the average relative humidity in September is 78%.Rainfall
In September, in Posterholt, the rain falls for 10.8 days. Throughout September, 23mm (0.91") of precipitation is accumulated. Throughout the year, there are 164.3 rainfall days, and 397mm (15.63") of precipitation is accumulated.Snowfall
April through October are months without snowfall.Daylight
The average length of the day in September in Posterholt is 12h and 38min.On the first day of September, sunrise is at 06:50 and sunset at 20:21. On the last day of the month, sunrise is at 07:35 and sunset at 19:15 CEST.
Sunshine
In September, the average sunshine in Posterholt is 8.1h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: The daily maximum UV index of 4 in September interprets into the following advice:
Be vigilant - Suggestions to stave off sun damage are provided. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Posterholt in September?
What is the average humidity in September in Posterholt?
How many days does it rain in September in Posterholt?
When it does not snow in Posterholt?
What is the average length of the day in September in Posterholt?
When is the sunrise / sunset in September in Posterholt?
How long on average sun shines in September in Posterholt?
What is the UV index reading in September in Posterholt?
Average temperature in September
Posterholt, Netherlands
- Average high temperature in September: 19.4°C
The warmest month (with the highest average high temperature) is July (23.3°C).
The month with the lowest average high temperature is January (4.8°C).
- Average low temperature in September: 11.1°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°C).
Average pressure in September
Posterholt, Netherlands
- Average pressure in September: 1017.6mbar
The month with the highest atmospheric pressure is September (1017.6mbar).
The month with the lowest atmospheric pressure is November (1012.9mbar).
Average wind speed in September
Posterholt, Netherlands
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is December (17.3km/h).
The calmest month (with the lowest average wind speed) is August (11.1km/h).
Average humidity in September
Posterholt, Netherlands
- Average humidity in September: 78%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Posterholt, Netherlands
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is June (42mm).
The driest month (with the least rainfall) is April (20mm).
Average rainfall days in September
Posterholt, Netherlands
- Average rainfall days in September: 10.8 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is September (10.8 days).
Average snowfall in September
Posterholt, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is January (31mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Posterholt, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.7 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
Posterholt, Netherlands
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 30min).
The month with the shortest days is December (Average daylight: 8h and 0min).
- Average sunshine in September: 8h and 1min
The months with the most sunshine are July and August (Average sunshine: 9h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 54min).
Average sunshine days in September
Posterholt, Netherlands
- Average sunshine days in September: 17.2 days
The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Posterholt, 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
Posterholt, Netherlands
- Average cloud cover in September: 40
The month with the most cloud cover is December (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Posterholt, 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).
