Climate diagram of <a href="//commons.wikimedia.org/wiki/Siegen" title="Siegen">Siegen</a>, <a href="//commons.wikimedia.org/wiki/Germany" class="mw-redirect" title="Germany">Germany</a> over the period 1961–1990. Data source: <a href="https://en.wikipedia.org/wiki/Deutscher_Wetterdienst" class="extiw" title="en:Deutscher Wetterdienst">Deutscher Wetterdienst</a>.
<a rel="nofollow" class="external text" href="mailto:bob.commons@gmail.com">Bob Ionescu</a>
Attribution
self-made by author