Belgium weather in September 2025
Belgium weather in September 2025
Day
19 °C
Night
12 °C
Sea
17 °C
Precipitation
68 mm
in month
Rainy days
11 days
in month
Daylight
13 hours
average
Sunshine
5 hours
average
Humidity
81 %
Day
19 °C
Night
12 °C
Sea
17 °C
Precipitation
68 mm
in month
Rainy days
11 days
in month
Daylight
13 hours
average
Sunshine
5 hours
average
Humidity
81 %
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Weather overview and FAQs
Weather overview
In Belgium in September, the average air temperature ranges from 19 °C (66 °F) during the day to 12 °C (53 °F) at night. There are 11 days of rain on average, where the rainfall is 68 mm (2.66 in).
Is September a good month to visit Belgium?
There are good conditions for visiting in Belgium in September. Especially for non-beach activities, such as hiking or sightseeing. There are some people, who may feel a slight chill at 19 °C (66 °F), but others will feel perfectly fine. The temperature of 12 °C (53 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the sea temperature in September in Belgium?
The temperature of the sea in Belgium in September is 17 °C (63 °F). At this sea temperature, swimming probably won't be the best experience. You probably won't like to stay in water for a long time. On the other hand, there are a minority of people who seek these conditions.
What temperature can I expect during the day in September in Belgium?
In Belgium in September, the average daily temperatures will be 19 °C (66 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
What is the air temperature in Belgium in September at night?
The average night temperature in Belgium in September is 12 °C (53 °F). Nights can be cooler, morning running can be refreshing but choose appropriate clothing, evening outdoor sitting can be pleasant but you can also be cold.
How many rainy days can I expect in Belgium in September?
There are 11 days, which are rainy in September in Belgium, that is, days with precipitation more than 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.5 days of the week, or in general - 36 % days.
What is the rainfall intensity in September in Belgium?
There is precipitation of 68 mm (2.66 in) in September in Belgium, which means 2 mm (0.09 in) rainfall per day on average.
How many sunny hours can I expect in Belgium in September?
In September in Belgium, you can expect around 5 hours of sunshine.
Is September part of the wet season in Belgium?
No, there is no wet season in September in Belgium - you can expect 11 days of rain during the month.
Is September part of the dry season in Belgium?
No, September is not a dry month in Belgium, expect rain approximately 11 days in a month.
How humid is Belgium in September?
Humidity in Belgium in September is 81 %. This humidity is rather above average, but except for sensitive individuals, it should not be a problem.
How long is the day (from dawn till dusk) in Belgium in September?
The length of daylight in Belgium in September is 13 hours.
Is the weather in Belgium warmer in September than in August?
No, September is not warmer in Belgium than August.
How windy is Belgium in September?
In Belgium in September, there will be an average wind scale of 5.
Is the sea in Belgium warmer in September than in August?
No, the sea is not warmer in September in Belgium than in August.
Is Belgium rainier in September than in October?
No, September in Belgium is not a rainier month than October.