The Rutor glacier is one of the most important glaciers in the north-west of Italy (Aosta Valley). Due to both climate change related phenomena and to natural cycles it is melting quite fast. Water coming from the melting of the main glacier tongue is converging through a seasonal stream to a lake, located in the periglacial area. The temperature and the water level of this seasonal lake has been measured during the summer period (mid-July to mid-September 2021) with a probe. The objective of the work is to create a model that can estimate the temperature of the lake based on the air temperature, incoming radiation, wind speed and relative humidity, measured in different meteorological stations located close to the lake area.