Nakano's winters are chilly, with temperatures fluctuating between -7°C and 18°C on average around 4°C in January and December. Spring brings gradual warming, with March averaging 12°C and April peaking at 26°C. Summer months see Nakano bask in warmth, with July being the hottest, averaging 25°C. Autumn is mild, with temperatures dropping to around 5°C in October before rising again towards winter lows.