Omitama experiences mild winters with temperatures often fluctuating between freezing and mild conditions, averaging around 5-7°C in January and December. Spring arrives in March, bringing warmer temperatures that gradually rise throughout the season, reaching an average of 14°C by April. Summer months from June to August are warm, with temperatures frequently exceeding 30°C, peaking at 37°C in August. Autumn is characterized by a return to cooler temperatures, with averages dropping back down to around 13-18°C by November and October.