Kisarazu's winters are chilly, with temperatures ranging from -7°C to 18°C in January and December, averaging around 4-6°C. Spring brings mild temperatures, gradually warming up from 4-26°C in April to 8-30°C in May. Summers are hot and humid, peaking at 36-39°C in July-August, while autumns are mild and temperate, with temperatures cooling down to around 5-22°C in October-November. The temperature fluctuations between seasons are relatively pronounced, with significant drops in winter and rises in summer. Overall, Kisarazu's climate is characterized by warm summers and cool winters, with spring and autumn serving as transitional periods.