Nijmegen's winters are mild and unpredictable, with temperatures often fluctuating wildly between freezing and relatively balmy days. Spring brings gradual warming, but March can still see chilly mornings. Summer is warm and stable, with July and August enjoying average highs around 18C, while June sees a significant temperature spike. Autumn months start cool, but September's mild weather gives way to cooler temperatures by October and November. Winters are generally quite cold, with temperatures often below freezing for extended periods.