Wehrs, the son of an official, studied theology from 1769 to 1775. His knowledge of French, English and Italian led in 1772 to his being invited to be part of the Hainbund. Just one poem by him appeared in the Göttinger Musenalmanach of 1777. The poet Hölty died in his arms in 1776 in Hanover, during Wehrs's employment as house tutor (1775–79). In 1780 he became a pastor in Kirchhorst near Hannover, moving in 1788 to Isernhagen.