Luxembourg has a moderate, temperate climate, and rarely experiences extreme weather. Winters can get cold, while summers tend to be mild. Expats can expect pleasant temperatures of between 57ºF (14ºC) and 66ºF (19ºC) in the summertime, from June to September. That said, brief periods of hot weather do occur more regularly nowadays, sometimes climbing as high as 86ºF (30ºC). 

From December to March, winter temperatures generally hover above freezing, apart from during the coldest month of January, when it regularly drops below 32ºF (0ºC). Although infrequently, Luxembourg has recorded lows of 5ºF (-15ºC) over the past two decades.

Rain is common and plentiful throughout the year in Luxembourg, although winter does tend to come with more wet weather, as well as wind. That said, summer days can bring afternoon thunderstorms, although this does not occur regularly. Cloud cover is quite common, even on dry days. The warmer months generally get around 7 hours of sunshine per day though, with July averaging 10 hours of sun a day.