Arreau (; ) is a commune in the Hautes-Pyrénées department in southwestern France. It is situated on the former Route nationale 618, the Route of the Pyrénées. Arreau is at the crossroads of the Louron valley and the Aure valley. Geography Climate Arreau has a oceanic climate (Köppen climate classification Cfb). The average annual temperature in Arreau is . The average annual rainfall is with November as the wettest month. The temperatures are highest on average in July, at around , and lowest in January, at around . The highest temperature ever recorded in Arreau was on 30 July 1983; the coldest temperature ever recorded was on 3 February 1956. Population See also Communes of the Hautes-Pyrénées department References Communes of Hautes-Pyrénées