Second Polish Republic shares border with Nazi Germany
The country's total area, after the annexation of Zaolzie, was 389,720 km2 (150,470 sq mi). It extended 903 km (561 mi) from north to south and 894 km (556 mi) from east to west. On 1 January 1938, total length of boundaries was 5,529 km (3,436 mi), including: 140 km (87 mi) of coastline (out of which 71 km (44 mi) were made by the Hel Peninsula), the 1,412 km (877 mi) with Soviet Union, 948 kilometers with Czechoslovakia (until 1938), 1,912 km (1,188 mi) with Germany (together with East Prussia), and 1,081 km (672 mi) with other countries (Lithuania, Romania, Latvia, Danzig). The warmest yearly average temperature was in Kraków among major cities of the Second Polish Republic, at 9.1 °C (48.4 °F) in 1938; and the coldest in Wilno (7.6 °C or 45.7 °F in 1938). Extreme geographical points of Poland included Przeświata River in Somino to the north (located in the Braslaw county of the Wilno Voivodeship); Manczin River to the south (located in the Kosów county of the Stanisławów Voivodeship); Spasibiorki near railway to Połock to the east (located in the Dzisna county of the Wilno Voivodeship); and Mukocinek near Warta River and Meszyn Lake to the west (located in the Międzychód county of the Poznań Voivodeship).
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