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
Zoological Garden of Hamburg society for the purposes of creating a zoo. On July 10, 1860, at the charter meeting of the Zoological Society of Hamburg (German: "Zoologische Gesellschaft in Hamburg"), Merck was selected as president. It was the fifth zoo in Germany, following the Berlin Zoological Garden in 1844, the Frankfurt Zoological Garden in 1858, the Cologne Zoological Garden in 1860 and the Dresden Zoo in 1861. The Society was a shareholding company. In 1861 it purchased a 13-hectare (32 acre) plot of land outside the Hamburg city walls, next to a municipal cemetery. In November 1862 the zoo issued additional shares to