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
As September commences, the average high-temperature subtly reduces, transitioning from a moderately hot 23.1°C (73.6°F) in August to an enjoyable 19.4°C (66.9°F). The nighttime temperature, during September, averages of 11°C (51.8°F).Humidity
In September, the average relative humidity in Rotselaar, Belgium, is 79%.Rainfall
September is the month with the least rainfall. Rain falls for 8.5 days and accumulates 16mm (0.63") of precipitation.Snowfall
In Rotselaar, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 38min.On the first day of September, sunrise is at 06:55 and sunset at 20:26. On the last day of the month, sunrise is at 07:40 and sunset at 19:21 CEST.
Sunshine
In September, the average sunshine is 7.7h.UV index
In September, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A daily maximum UV index of 4 in September translates into the following instructions:
Take precautions - Protection against sunburn is recommended. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Rotselaar have in September?
What is the UV index reading in September?
Average temperature in September
Rotselaar, Belgium
- Average high temperature in September: 19.4°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 (4.9°C).
- Average low temperature in September: 11°C
The month with the highest average low temperature is August (14°C).
The coldest month (with the lowest average low temperature) is January (1°C).
Average pressure in September
Rotselaar, Belgium
- Average pressure in September: 1017.5mbar
The month with the highest atmospheric pressure is September (1017.5mbar).
The month with the lowest atmospheric pressure is November (1012.5mbar).
Average wind speed in September
Rotselaar, Belgium
- Average wind speed in September: 11.9km/h
The windiest month (with the highest average wind speed) is December (18.1km/h).
The calmest month (with the lowest average wind speed) is August (11.7km/h).
Average humidity in September
Rotselaar, Belgium
- Average humidity in September: 79%
The month with the highest relative humidity is December (88%).
The month with the lowest relative humidity is August (74%).
Average rainfall in September
Rotselaar, Belgium
- Average rainfall in September: 16mm
The wettest month (with the highest rainfall) is December (57mm).
The driest month (with the least rainfall) is September (16mm).
Average rainfall days in September
Rotselaar, Belgium
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is December (18.5 days).
The month with the least rainy days is September (8.5 days).
Average snowfall in September
Rotselaar, Belgium
- Average snowfall in September: 0mm
The month with the highest snowfall is February (41mm).
The months with the least snowfall are April, May, June, July, August, September and October (0mm).
Average snowfall days in September
Rotselaar, Belgium
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5 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
Rotselaar, Belgium
- 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: 7h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 12min).
The month with the least sunshine is December (Average sunshine: 3h and 48min).
Average sunshine days in September
Rotselaar, Belgium
- Average sunshine days in September: 20.1 days
The month with the most sunshine days is September (20.1 days).
The month with the least sunshine days is February (8.7 days).
Average UV index in September
Rotselaar, Belgium
- 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
Rotselaar, Belgium
- Average cloud cover in September: 42
The month with the most cloud cover is December (Cloud cover 62).
The months with the least cloud cover are April and August (Cloud cover 41).
Average visibility in September
Rotselaar, Belgium
- Average visibility in September: 9km
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (9km).
The month with the lowest visibility is January (8km).
