Le Quiou has an oceanic climate (Köppen climate classificationCfb). The average annual temperature in Le Quiou is 11.8 °C (53.2 °F). The average annual rainfall is 714.9 mm (28.15 in) with November as the wettest month. The temperatures are highest on average in July, at around 18.4 °C (65.1 °F), and lowest in January, at around 5.8 °C (42.4 °F). The highest temperature ever recorded in Le Quiou was 40.4 °C (104.7 °F) on 5 August 2003; the coldest temperature ever recorded was −14.5 °C (5.9 °F) on 25 February 1986.
Climate data for Le Quiou (1981–2010 averages, extremes 1985−2020)