Sumida's winters are cold and variable, with temperatures often below freezing in January and February, but occasionally rising above 20°C by the end of the season. Spring brings mild temperatures, gradually warming up from March to May, with April being particularly pleasant. Summer is hot and humid, with July and August being the warmest months, while September marks a gradual cooling down. Autumn is relatively cool, with October experiencing a significant drop in temperature before November's temperatures begin to rise again, only to dip back into winter chill by December.