The winters in Siemianowice Slaskie are quite chilly, with January being the coldest month, often dipping below freezing point and averaging around 2°C. As spring approaches, temperatures gradually rise, but March remains relatively cool, averaging just 1°C. The warmth of summer is a welcome relief, with June to August being the warmest months, with average highs ranging from 18°C to 20°C. Autumn brings a gentle cooling, with September and October experiencing mild temperatures, before the cold sets in again for winter. December can be quite chilly, with temperatures often below freezing point, but still averaging around 0°C.