Fukutsu's winters are cool and sometimes chilly, with temperatures ranging from just below freezing to mild highs. Spring brings a gradual warming trend, with temperatures rising steadily throughout the season. Summer is warm to hot, with temperatures often reaching the mid-30s Celsius, while autumn sees a return to milder conditions, similar to those of spring. In general, daytime temperatures are generally pleasant year-round, but nighttime lows can be quite cool during winter and early spring.