Sekimachi's winters are chilly, with temperatures often below freezing in January and February, but warming up slightly by March. Spring brings steady growth, with April and May temperatures rising steadily into the mid-twenties Celsius. Summer is hot and humid, with July and August being the warmest months, while September marks a gentle decline back towards autumnal conditions. Autumn sees temperatures drop again, with October's warmth followed by November's coolness, before December brings a final chill. The annual temperature range is significant, reflecting Japan's temperate climate.