September weather forecastMerum, Netherlands
September
Weather in September
September, the first month of the autumn in Merum, is still a refreshing month, with an average temperature varying between 11.1°C (52°F) and 19.3°C (66.7°F).Temperature
September ushers in a minor alteration in Merum's climate, with the average high-temperature moving from August's warm 23.2°C (73.8°F) to an enjoyable 19.3°C (66.7°F). During the nights in September, an average low-temperature of 11.1°C (52°F) is observed.Humidity
In Merum, Netherlands, the average relative humidity in September is 78%.Rainfall
In Merum, in September, during 6.7 rainfall days, 7mm (0.28") of precipitation is typically accumulated. Throughout the year, in Merum, there are 86.6 rainfall days, and 113mm (4.45") of precipitation is accumulated.Snowfall
In Merum, snow does not fall in April through November.Daylight
In Merum, the average length of the day in September 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
The average sunshine in September in Merum is 8h.UV index
In Merum, Netherlands, 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 radiation for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Prioritize safety - Suggestions to prevent sun damage are offered. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Merum, Netherlands
- Average high temperature in September: 19.3°C
The warmest months (with the highest average high temperature) are July and August (23.2°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 (14.1°C).
The coldest month (with the lowest average low temperature) is January (1°C).
Average pressure in September
Merum, Netherlands
- Average pressure in September: 1017.4mbar
The month with the highest atmospheric pressure is September (1017.4mbar).
The month with the lowest atmospheric pressure is November (1012.8mbar).
Average wind speed in September
Merum, Netherlands
- Average wind speed in September: 11.5km/h
The windiest month (with the highest average wind speed) is December (17.5km/h).
The calmest months (with the lowest average wind speed) are July and August (11.3km/h).
Average humidity in September
Merum, 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
Merum, Netherlands
- Average rainfall in September: 7mm
The wettest month (with the highest rainfall) is February (12mm).
The driest month (with the least rainfall) is April (5mm).
Average rainfall days in September
Merum, Netherlands
- Average rainfall days in September: 6.7 days
The month with the highest number of rainy days is May (9.1 days).
The month with the least rainy days is April (5.6 days).
Average snowfall in September
Merum, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (9mm).
The months with the least snowfall are April, May, June, July, August, September, October and November (0mm).
Average snowfall days in September
Merum, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.2 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
Merum, Netherlands
- Average daylight in September: 12h and 36min
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 0min
The month with the most sunshine is August (Average sunshine: 9h and 24min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Merum, Netherlands
- Average sunshine days in September: 20.9 days
The month with the most sunshine days is October (23.2 days).
The month with the least sunshine days is June (17.8 days).
Average UV index in September
Merum, 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
Merum, Netherlands
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 39).
Average visibility in September
Merum, 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).
