Winters in Siauliai are harsh and cold, with temperatures often dropping below -20°C and averaging around -4°C. The coldest months are January and February, with frequent frosts and occasional snowfall. As spring approaches, temperatures gradually rise, with March being a transitional month with mild days and chilly nights. Summer is warm and pleasant, with July being the hottest month, but still relatively cool compared to many other parts of Europe, with average highs around 22°C. Autumn brings cooler temperatures again, with October and November experiencing frosty mornings and occasional rain showers.