Winters in Uppsala are long and cold, with temperatures often below freezing, especially in January and February when lows can drop as low as -23°C. The coldest months typically see average temperatures around -4°C, but some days can be relatively mild with highs reaching 12°C. Spring is a gradual warming period, with March marking the beginning of above-freezing temperatures and April seeing steady increases towards summer. Summers are warm to hot, with July being the warmest month, averaging around 20°C, while temperatures in June and August average just below that. As autumn approaches, temperatures cool once more, returning to averages around freezing by October.