Winters in Noboribetsu are harsh, with January and February temperatures often below freezing, averaging around -6°C and -4°C respectively. Spring brings a slow warming trend, with March temperatures fluctuating between -14°C and 16°C before stabilizing by April at an average of 7°C. Summers are warm to hot, with July being the warmest month, averaging 22°C, while September and October see temperatures drop, averaging around 18°C and 11°C respectively. Autumn is similar to spring in terms of temperature fluctuations, with November temperatures returning to averages around 7°C. Winters return with a vengeance by December, bringing average lows of -2°C.