Ayase, Japan experiences harsh winters with temperatures often dropping below -30°C in January and February. As spring approaches, temperatures gradually rise, reaching averages of around 8°C by April and 13°C by May. Summer months bring sweltering heat, with July and August averaging highs above 35°C. Autumn sees a cooldown, with September's temperature fluctuating between -6°C to 32°C before dropping again in November. Winters return in December, mirroring January's extreme lows.