Loudéac is a commune in the Côtes-d'Armor department, Brittany, northwestern France. Loudéac has an oceanic climate. The average …Loudéac is a commune in the Côtes-d'Armor department, Brittany, northwestern France. Loudéac has an oceanic climate. The average annual temperature in Loudéac is 11.4 °C. The average annual rainfall is 901.3 mm with December as the wettest month. The temperatures are highest on average in August, at around 17.8 °C, and lowest in January, at around 5.6 °C. The highest temperature ever recorded in Loudéac was 37.9 °C on 9 August 2003; the coldest temperature ever recorded was −11.0 °C on 2 January 1997.