Asahikawa's winters are harsh, with temperatures often plummeting below -20°C in January and February. Spring brings a gradual warming trend, with temperatures rising above freezing by March and reaching up to 19°C by April. Summer is mild, with highs around 37°C in July and August, but nights can still be cool, dipping as low as 10°C. Autumn is characterized by rapidly dropping temperatures, with October's average high of 23°C giving way to November's chilly averages below 5°C. By December, winter returns, with temperatures once again dipping below -20°C.