The climate in Luxembourg during September can be summarized as mild and reasonably dry.
September is in the fall / autumn in Luxembourg and is typically the 4th warmest month of the year. Daytime maximum temperatures average around 19°C (67°F), whilst at night 10°C (49°F) is normal.
|Daytime temperature||19.2°C 66.5°F|
|Nightly temperature||9.5°C 49°F|
|Average temperature||14.3°C 57.7°F|
|Daily sunshine||5.8 hrs|
|Avg rainfall||71 mm 2.8 ins|
|Rainy days||13 days|
|Sea temperature||19.1°C 66.4°F|
|Windspeed||11.5kph 7 mph|
On average September is the 5th driest month of the year in Luxembourg with around 71mm 2.8 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.8 hours of sunshine per day.
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Luxembourg in September 2023.
Best places to visit in September
|Hottest month:||July||22.6°C 72.7°F|
|Driest month:||April||59mm 2.3ins|
|Coldest month:||January||2.8°C 37°F|
|Wettest month:||December||95mm 3.7ins|