Arbéost has an oceanic climate (Köppen climate classificationCfb). The average annual temperature in Arbéost is 10.2 °C (50.4 °F). The average annual rainfall is 1,411.1 mm (55.56 in) with November as the wettest month. The temperatures are highest on average in August, at around 17.0 °C (62.6 °F), and lowest in January, at around 4.2 °C (39.6 °F). The highest temperature ever recorded in Arbéost was 35.8 °C (96.4 °F) on 27 June 2019; the coldest temperature ever recorded was −14.9 °C (5.2 °F) on 8 February 2012.
Climate data for Arbéost (1991−2020 normals, extremes 2007−present)