During the Second World War, Wiehle was a German soldier in the Flak and the Kriegsmarine from 1943 to 1945.
In the post-war period, he worked as a farm labourer in the Landkreis Bremervörde [de] until 1946, before he was then employed as a miner in Rositz in Thuringia until 1948.
He worked from 1951 to 1954 as a librarian at the Landesstelle für Bibliothekswesen, first in Jena, later in Weimar.
From 1957 to 1963, Wiehle completed a distance learning course in history at Berlin's Humboldt University, from which he came out as a graduate historian.
His main focus was on regional and library history as well as library-related publications.