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 55–69°F, 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 76–85°F, 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 68–59°F, 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 45–46°F, 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. 64.9°F / Annual rainfall: approx. 2112 mm / Summer humidity: 70%–80% / Rainiest month: July
Shimabara monthly average temperature and precipitation
Month
Air temperature (°F)
Precipitation (mm)
January
43.9°F
56.5
February
46.9°F
92.7
March
55°F
251.4
April
63.9°F
223.6
May
69.8°F
274
June
76.1°F
369.8
July
83.5°F
371.5
August
85.8°F
165.2
September
81.7°F
92.3
October
68.7°F
96
November
59.2°F
81.8
December
45.7°F
37.8
Shimabara weather for the next seven days
3/21
Saturday
Sunny
57.4°F/48.3°F
3/22
Sunday
Moderate rain
60°F/51.4°F
3/23
Monday
Patchy rain nearby
60.4°F/50.2°F
3/24
Tuesday
Sunny
58°F/46.4°F
3/25
Wednesday
Moderate rain
50.7°F/48.3°F
3/26
Thursday
Sunny
60.9°F/47.6°F
3/27
Friday
Partly Cloudy
59°F/52.6°F
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