Winters in Maassluis are typically cool and variable, with temperatures often below freezing but occasionally rising into double digits. Spring arrives slowly, with temperatures gradually warming up throughout the months of March and April. Summer is mild and pleasant, with warm days and cooler nights, while autumn brings a return to cooler temperatures as the summer warmth fades. The coldest months are December, November, and January, when temperatures can drop below 0°C, while the warmest months are May, June, and July, when highs often reach above 20°C. Overall, Maassluis has a moderate climate with distinct seasonal variations.