Flensburg's winters are harsh and chilly, with temperatures often plummeting below freezing point, but occasional warmth brings the average temperature up to a moderate 2°C in January. As February arrives, temperatures remain steady around 2°C, but March marks the beginning of spring, bringing warmer days with highs reaching up to 21°C. Summer months bring mild and pleasant weather, with July being the warmest month, averaging 19°C, although occasional heatwaves can push temperatures above 30°C, as seen in May. Autumn is characterized by moderate temperatures, ranging from 6°C to 20°C, before dropping back down to chilly winter conditions.