Prague has a mild climate with warm, sometimes damp, summers and cold winters. The winters are very cold and the temperature averages around the freezing point and falls at night into –4 °C (26 °F). Generally snowfall does not happens in Prague in winter. January and February are the coldest months when the daily temperature hovers around –5 °C (23 °F). The average temperature in summer is 24 °C (74 °F) [can be also 30 °C (92 °F)]. At night, temperature falls to 15 °C (46 °F).
Spring and summer tend to be the sunniest months, the period between May and August is the rainiest. While traveling in summer you will need an AC car