Cool
Average highs are around 19°C, so pack for cooler days.
September verdict
Luxembourg in September
Weather score40Poor
Poor for holiday weather
Average highs are around 19°C, so pack for cooler days. Sunshine averages 5.1h per day, enough for a balanced month. Rainfall averages 73mm, which is relatively low for holiday planning.
September weather
Monthly averages
Temp
19°C
Rain
73mm
Sun
5.1h
Sea
0°C
Weather score
40
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 73mm, which is relatively low for holiday planning.
Some sun
Sunshine averages 5.1h per day, enough for a balanced month.
Cool sea
Sea temperatures average 0°C, so the water can feel cool.
Map
Weather map
Compare Luxembourg with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September19°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September73mm average rain
September sits on the drier side of Luxembourg's year, which helps with sightseeing and transfers.
Driest monthsJanuary to October
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September5.1 hours average sun
September sits close to Luxembourg's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsMay to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September0°C average sea
September is close to Luxembourg's usual sea temperature, with limited seasonal change in the water.
Warmest seaAll year
Sea temperatures stay warm enough for easy swimming through the year.
Weather score
September40 weather score
September sits close to Luxembourg's yearly weather-score average, giving a typical overall read on the month.
Best weather monthsJune to August
These months have the strongest weather score in the monthly averages.
