Winters in Bochum are generally cool, with temperatures often below freezing and occasional warm spells. Milder days can occur, especially towards the end of February and early March. Spring arrives with a gradual warming trend, with April and May seeing significant temperature increases, although occasional cooler periods still occur. Summer months are pleasant, with highs often reaching the mid-20s to low 30s Celsius, but temperatures rarely drop below 10C at night. Autumn returns to milder conditions, with a mix of warm and cool days as winter's chill begins to set in once more.