Imabari's winters are cool, with January and December temperatures averaging around 5°C and 8°C respectively, while February is slightly warmer. As spring approaches, temperatures rise steadily, reaching an average of 15°C in April and 19°C in May. Summer months of June to August bring warm to hot weather, with averages ranging from 23°C to 27°C, before gradually cooling down in autumn. Autumn's temperature fluctuations are noticeable, with September being the warmest month during this period, while November is cooler again.