Apeldoorn's winters are typically cool and sometimes cold, with temperatures often below freezing point in January and February. Spring brings gradual warming, with March and April temperatures rising steadily towards the mid-teens Celsius. Summer months of June and July are warm to hot, with average highs reaching into the mid-twenties. Autumn is mild, with September being a notable cooler month before the temperature drops again in October and November. Winters return by December, bringing chilly days and occasional frosts.