Winters in Pernik are cold, with temperatures often dropping below freezing point and averaging around 0°C. The coldest months, January and December, see temperatures ranging from -18°C to 14°C, while February is slightly warmer, with averages between -19°C and 20°C. As spring approaches, temperatures gradually rise, with March and April experiencing mild days with temperatures sometimes reaching up to 28°C. Summers are warm, with July and August being the hottest months, averaging around 20°C, but occasionally soaring to highs of 36°C. Autumn brings a return to cooler temperatures, with September and October experiencing averages between -1°C and 25°C.