Geography and urban development of Dresden temperatures are almost the same as those in cities in southwest Germany; on average 10.2°C per year. In hot summers, Dresden is between the hot Lusatia and the milder Ore Mountains. Both regions are characterised by strong winters: temperatures of −20°C are not impossible in Dresden. The driest months are February and March, with precipitation of 40 mm. Spring months have often been arid in the last couple of years (with less than 10 mm of precipitation). The most precipitation falls in July and August, at 60 mm per month. Due to its location on the banks of the Elbe
Accession of Hamburg to the German Customs Union (Zollverein) proposal on 14 June, which was carried by nine votes to six. The three Hanseatic cities, through their joint envoy Friedrich Krüger, voted against the Austrian proposal and made a declaration (formulated by Lübeck) that the events in Holstein did not justify Federal mobilisation, because the danger of immediate military collision had passed. Then on 16 June, Emil von Richthofen, the Prussian envoy to the Hanseatic states, presented to the Hamburg Senate and other German governments an "identical note" asking for an alliance on the basis of Prussia's reform proposal placed before the Diet and requesting that its troops be