Summer (July and August) is peak tourist season, with warm temperatures, long daylight hours and a host of festivals. Hotels in Luxembourg City are generally cheaper than during the rest of the year.
Spring (April to June) and autumn (particularly September and October) see milder temperatures, beautiful foliage and, outside the capital, fewer crowds. Autumn harvests in the Moselle Valley are celebrated with wine festivals.
Winter (November to March) can be chilly and often brings snow. Days are shorter and darker but are brightened by Christmas markets and pre-Lent Carnaval celebrations.