Winter in Obihiro is harsh, with January and February averaging around -7°C and -4°C respectively, with temperatures often dropping below -20°C. Spring brings a slow warming trend, with April and May seeing average highs of 7°C and 12°C, while June marks the beginning of warm summers. July and August are the hottest months, with averages around 20°C, but September's temperature drops back down to around 16°C. Autumn is mild, with October averaging 11°C and November around 6°C, before winter returns in December with temperatures often dipping below -20°C again.