The Kraków-Częstochowa Upland, also known as the Polish Jurassic Highland or Polish Jura (Polish: Jura Krakowsko-Częstochowska), is part of the Jurassic System of south?central Poland, stretching between the cities of Kraków, Częstochowa and Wieluń.
The Vistula (/?v?stj?l?/; Polish: Wisła ?viswa) is the longest and largest river in Poland, at 1,047 kilometres (651 miles) in length.The drainage basin area of the Vistula is 194,424 km2 (75,068 sq mi), of which 168,699 km2 (65,135 sq mi) lies within Poland (splitting the country in half). The remainder is in Belarus, Ukraine and Slovakia. The Vistula rises at Barania Góra in the south of Poland, 1,220 meters (4,000 ft) above sea level in the Silesian Beskids (western part of Carpathian Mountains), where it begins with the White Little Vistula (Biała Wisełka) and the Black Little Vistula (Czarna Wisełka).1 It then continues to flow over the vast Polish plains, passing several large Polish cities along its way, including Kraków, Sandomierz, Warsaw, Płock, Włocławek, Toruń, Bydgoszcz, Świecie, Grudziądz, Tczew and Gdańsk.
It empties into the Vistula Lagoon (Zalew Wiślany) or directly into the Gdańsk Bay of the Baltic Sea with a delta and several branches (Leniwka, Przekop, Śmiała Wisła, Martwa Wisła, Nogat and Szkarpawa).Źródło: https://en.wikipedia.org/wiki/Vistula
Kraków has an oceanic climate (Cfb) according to the Köppen climate classification system, one of the easternmost localities in Europe to do so..A mere 100 km (62 mi) north-east of Kraków (east of Tarnów, and north of Kielce), the January mean dips below ?3 °C (27 °F) and thus becomes continental (Dfb) in nature.The Kraków climate is also influenced by its far inland position, with significant temperature differences between seasons.Average temperatures in summer range from 18 to 19.6 °C (64 to 67 °F) and in winter from ?2.0 to ?0.6 °C (28 to 31 °F).
The average annual temperature is 8.7 °C (48 °F).
In summer temperatures often exceed 25 °C (77 °F), and even 30 °C (86 °F), while winter drops to ?5 °C (23 °F) at night and about 0 °C (32 °F) at day; during very cold nights the temperature can drop to ?15 °C (5 °F).Since Kraków lies near the Tatra Mountains, there are often occurrences of halny blowing (a foehn wind), causing temperatures to rise rapidly, and even in winter reach up to 20 °C (68 °F).Źródło: https://en.wikipedia.org/wiki/Krak%C3%B3w#Climate