Passau's winters are chilly and unpredictable, with temperatures often dropping below freezing in January and February, but occasionally rising into double digits. As spring arrives in March and April, temperatures gradually warm up, with occasional hot days reaching up to 24°C. Summer months bring pleasant warmth, with highs often reaching the mid-30s Celsius in June, July, and August, although overnight lows can still dip into single digits. Autumn is generally mild, with temperatures gradually cooling down as September and October progress, but rarely dropping below freezing. Winters are once again cold and frosty, with temperatures typically hovering around 0°C from November to December.