Winters in Plzen are cold and variable, with temperatures often dropping below freezing point, averaging around -1°C in January. Spring brings a steady warming trend, with March being the first month to consistently reach above 0°C, while April's temperatures average around 6°C. Summers are mild and warm, with June and July temperatures frequently reaching highs of over 30°C, but rarely dipping below 10°C. Autumn is characterized by a gradual cooling down, with September and October averaging around 15°C and 8°C respectively. The coldest month overall is February, while the warmest months are June and July.