Winters in Leuven are chilly, with temperatures often below freezing, especially in January and February when lows can drop as low as -11°C. The coldest months also see a narrow range of temperatures, indicating little variation from day to night. Spring arrives in March, with temperatures slowly warming up, but still experiencing some frosty mornings. Summer brings pleasant warmth, with highs often reaching the mid-20s and lows staying above 10°C, making it the warmest season. As autumn sets in, temperatures start to drop once more, returning to a cooler range by November and December.