Ichikawa experiences a temperate climate with distinct seasonal changes. Winters are cold, with temperatures often below freezing in January and February, but gradually warming up by March as the average high temperature rises to around 12°C. Spring brings rapid warming, with temperatures soaring to over 20°C by May and June, making it a pleasant time of year. Summer is hot and humid, with temperatures frequently reaching above 30°C from July to September, while autumn sees a welcome cool-down, with temperatures dropping back down to around 10-15°C by October and November. Winters return in December, bringing chilly temperatures once again.