In August the temperature usually fluctuates from +10/12oC at night up to +15/25oC in the daytime, rains are quite possible.
The tender in Poland is the Polish zloty (PLN)
The Current rates of exchange is here (www.nbp.pl/homen.aspx?f=/srodeken.htm)
Currency exchange facilities are available at several domestic and international bank branches and exchange offices in the downtown.
OPENING HOURS OF SHOPS AND SOME OTHER FACILITIES
Shops: mainly open from 10 a.m. till 7-8 p.m.
Supermarkets: mainly open from 9 a.m. till 10 p.m.
Restaurants: mainly open from 10 a.m.