September weather forecastHei, Netherlands
September
Weather in September
September, the first month of the autumn in Hei, is still a comfortable month, with an average temperature fluctuating between 11.1°C (52°F) and 19.2°C (66.6°F).Temperature
The onset of September is marked by a minor decrease in temperature, transitioning from a moderately hot 23.1°C (73.6°F) in August to an enjoyable 19.2°C (66.6°F). Hei, during September, witnesses an average low-temperature of 11.1°C (52°F).Humidity
The average relative humidity in September in Hei is 79%.Rainfall
In September, the rain falls for 9.9 days. Throughout September, 14mm (0.55") of precipitation is accumulated. Throughout the year, there are 140.7 rainfall days, and 236mm (9.29") of precipitation is accumulated.Snowfall
In Hei, snow does not fall in April through October.Daylight
In September, the average length of the day in Hei is 12h and 38min.On the first day of the month, sunrise is at 06:49 and sunset at 20:21. On the last day of September, in Hei, sunrise is at 07:35 and sunset at 19:15 CEST.
Sunshine
The average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September leads to these instructions:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hei, Netherlands
- Average high temperature in September: 19.2°C
The warmest month (with the highest average high temperature) is July (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
Hei, Netherlands
- Average pressure in September: 1017.3mbar
The month with the highest atmospheric pressure is September (1017.3mbar).
The month with the lowest atmospheric pressure is November (1012.6mbar).
Average wind speed in September
Hei, 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
Hei, Netherlands
- Average humidity in September: 79%
The month with the highest relative humidity is December (87%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Hei, Netherlands
- Average rainfall in September: 14mm
The wettest month (with the highest rainfall) is December (25mm).
The driest month (with the least rainfall) is April (12mm).
Average rainfall days in September
Hei, Netherlands
- Average rainfall days in September: 9.9 days
The month with the highest number of rainy days is July (14 days).
The month with the least rainy days is September (9.9 days).
Average snowfall in September
Hei, Netherlands
- Average snowfall in September: 0mm
The month with the highest snowfall is February (19mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Hei, Netherlands
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.2 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
Hei, 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: 7h and 54min
The months with the most sunshine are July and August (Average sunshine: 9h and 18min).
The month with the least sunshine is December (Average sunshine: 3h and 36min).
Average sunshine days in September
Hei, Netherlands
- Average sunshine days in September: 17 days
The month with the most sunshine days is April (17.2 days).
The month with the least sunshine days is June (12.8 days).
Average UV index in September
Hei, 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
Hei, 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
Hei, 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).
