Winters in Bay City are typically cold and snowy, with temperatures often dropping below freezing and averaging around -5°C. The coldest months are January and February, with temperatures ranging from -20°C to 14°C. Spring brings a gradual warming trend, with March and April seeing average highs of around 5°C and 9°C respectively. Summer is mild, with July and August being the warmest months, averaging highs of around 22°C. Autumn brings a return to cooler temperatures, with October and November averaging around 14°C and 3°C respectively.