Giromagny has an oceanic climate (Köppen climate classificationCfb). The average annual temperature in Giromagny is 10.2 °C (50.4 °F). The average annual rainfall is 1,636.6 mm (64.43 in) with December as the wettest month. The temperatures are highest on average in July, at around 19.1 °C (66.4 °F), and lowest in January, at around 1.7 °C (35.1 °F). The highest temperature ever recorded in Giromagny was 37.2 °C (99.0 °F) on 24 July 2019; the coldest temperature ever recorded was −18.9 °C (−2.0 °F) on 20 December 2009.
Climate data for Giromagny (1991–2020 averages, extremes 1991−present)