With the impression of the threat of nature still fresh in our minds after visiting the damaged houses on Mount Unzen and the Gamasu Dome, we boarded the ferry. It took about 40 minutes from Shimabara Port to Kumamoto Port. The view from the sea further deepened our understanding of the greatness of the Earth.
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Shimabara Weather, Climate and Best Time to Visit
Data source:Meteostat Update date:2025-09
Shimabara year round climate
Spring (March–May): Average 12.8–21.0°C, warm and humid climate with relatively high rainfall. Cherry blossoms occasionally bloom in March and April. Common activities: Cherry blossom viewing (depending on bloom conditions), hiking, visiting historical sites. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
Summer (June–August): Average 24.5–29.9°C, hot and humid with relatively high rainfall, especially in July. Common activities: Beach activities, visiting museums, enjoying local cuisine. Recommended clothing: Light and breathable clothing, sun hat, sunscreen.
Autumn (September–November): Average 20.4–15.1°C, comfortable and pleasant climate with relatively low rainfall. Common activities: Hiking, onsen experience, enjoying autumn scenery. Recommended clothing: Light jacket, long-sleeved shirt, comfortable shoes.
Winter (December–February): Average 7.6–8.3°C, cold and humid climate with relatively low rainfall. Common activities: Indoor activities, onsen experience, enjoying local cuisine. Recommended clothing: Warm jacket, scarf, gloves, hat.
Shimabara climatological average
Annual average temperature: approx. 18.3°C / Annual rainfall: approx. 2112 mm / Summer humidity: 70%–80% / Rainiest month: July
Shimabara monthly average temperature and precipitation
Month
Air temperature (°C)
Precipitation (mm)
January
6.6°C
56.5
February
8.3°C
92.7
March
12.8°C
251.4
April
17.7°C
223.6
May
21°C
274
June
24.5°C
369.8
July
28.6°C
371.5
August
29.9°C
165.2
September
27.6°C
92.3
October
20.4°C
96
November
15.1°C
81.8
December
7.6°C
37.8
Shimabara weather for the next seven days
3/21
Saturday
Sunny
14.1°C/9.1°C
3/22
Sunday
Moderate rain
15.5°C/10.8°C
3/23
Monday
Patchy rain nearby
16.1°C/10.1°C
3/24
Tuesday
Sunny
14.5°C/8°C
3/25
Wednesday
Moderate rain
10.4°C/9°C
3/26
Thursday
Sunny
16.1°C/8.7°C
3/27
Friday
Patchy rain nearby
14.4°C/11.2°C
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