Nagasaki Prefecture Free Weather Report 2025

🇯🇵 Nagasaki Prefecture Weather Report – Month-by-Month Overview

❄️ January
Mild and damp. Nagasaki City averages 5–12°C. Snow is rare in coastal areas but possible in mountainous regions like Unzen. Rainfall is moderate, and skies are often cloudy.

🌨️ February
Still cool. Highs reach 11–14°C, with lows around 5°C. Occasional frost inland. Rain continues in coastal zones, and sunshine hours gradually increase.

🌱 March
Spring begins. Temperatures rise to 13–18°C. Plum blossoms bloom, and rainfall increases slightly. Coastal areas warm faster, while inland valleys stay crisp.

🌸 April
Mild and vibrant. Highs reach 18–23°C. Cherry blossoms peak across the prefecture, especially in parks and castle grounds. Rain showers alternate with sunny spells.

🌼 May
Warm and pleasant. Temperatures climb to 21–26°C. Rainfall is light, and skies are mostly clear. Ideal for hiking, island visits, and countryside travel.

☀️ June
Start of the rainy season. Highs range from 24–29°C. Humidity rises, and afternoon showers are frequent. Rivers swell, and vegetation flourishes.

🔥 July
Hot and humid. Temperatures reach 28–34°C. Rainfall peaks early, then tapers off. Summer festivals begin, and evenings stay warm and muggy.

🏖️ August
Still hot. Highs remain between 29–35°C. Rain is infrequent, and sunshine dominates. Beaches and coastal towns like Iki and Goto are popular for swimming and fireworks.

🍂 September
Transition to autumn. Temperatures ease to 25–31°C. Rain returns gradually, and typhoon activity may affect coastal areas. Nights begin to cool.

🌦️ October
Cooler and clearer. Highs drop to 19–26°C. Rainfall decreases, and autumn foliage begins in the mountains. Ideal for travel and photography.

🌫️ November
Chilly and dry. Highs hover around 14–21°C, with lows near 9°C. Rain is minimal, and foggy mornings are common. Fall colors peak inland.

🎄 December
Winter returns. Temperatures range from 7–14°C. Snow is rare, but mountain areas may see frost. Skies are mostly clear, and festive lights appear in towns.