Wroclaw, where it's located

The climate of Wroclaw is moderately continental, characterized by cold winters, with temperatures often below freezing (0 °C or 32 °F), and mild or pleasantly warm summers.
Wroclaw (or Vratislavia) is located in southwestern Poland, in Lower Silesia.
The average temperature of the coldest month (January) is of -0.8 °C (31 °F), that of the warmest month (July) is of 19 °C (66 °F). Here are the average temperatures.
Wroclaw - Average temperatures
Min (°C)-4-3038111313950-3
Max (°C)2481520222524191483
Min (°F)252732374652555548413227
Max (°F)363946596872777566574637

Precipitation amounts to 535 millimeters (21.1 inches) per year: so, it is at an intermediate level. It ranges from 25 mm (1 in) in the driest month (January) to 80 mm (3.1 in) in the wettest (July). Here is the average precipitation.
Wroclaw - Average precipitation

On average, there are around 1,860 sunshine hours per year. Here are the average sunshine hours per day.
Wroclaw - Sunshine


Best Time

The best time to visit Wroclaw runs from mid-May to mid-September, since it is the warmest and sunniest period of the year. Sometimes, it can be hot in July and August, while in other circumstances, nights can be cool or even a little cold even in these months, so it can be useful to bring a sweatshirt or sweater and a light jacket for the evening.