Winters in Higashi-Matsuyama are cold and variable, with temperatures often dropping below freezing and rarely rising above 18°C. Spring arrives in late March, bringing warmer temperatures that steadily increase throughout the month, eventually reaching averages of around 14°C by April. Summers are warm to hot, with July and August being the hottest months, but even then, nighttime temperatures can still dip into the mid-to-high teens. Autumn is mild, with September being a pleasant precursor to the cooler November, which marks the return of autumnal chill. December brings back cold weather, similar to January, closing out the year in Higashi-Matsuyama's seasonal cycle.