Kumamoto Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Kumamoto.
Climate overview of Kumamoto
Kumamoto, Kumamoto, Japan, sees big temperature differences between seasons, with August peaking at 32°C (90°F) and January dropping to 11°C (52°F).
Rainfall is high, totalling around 2037 mm (80 in) per year. June is the wettest month and January the driest. The city also experiences a distinct rainy season from May to July. Sunshine peaks in August, when the city sees around 6.9 hours of sunshine per day.
Kumamoto Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Kumamoto — and find the best time to visit.
Monthly Temperature in Kumamoto
Visitors to Kumamoto can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a very warm 32°C (90°F) in August, the warmest time of the year, to a chilly 11°C (52°F) during cooler months like January.
At night, you can expect temperatures ranging from 24°C (75°F) in August to around 3°C (37°F) during January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Kumamoto
Kumamoto is known for its substantial rainfall, with annual precipitation reaching 2037 mm (80 in). Significant seasonal changes in precipitation occur throughout the year. In the wettest month, June it receives heavy rainfall, averaging 436 mm (17 in) of precipitation, recorded across 19 rainy days. In contrast, the driest month January brings less rainfall, with 85 mm (3.3 in) over 18 rainy days. For more details, please visit our Kumamoto Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Kumamoto
While the amount of sunshine in Kumamoto varies throughout the year, all seasons offer their own charm. Enjoy up to 6.9 hours of daily sun in August, and experience slightly darker atmosphere in June, with about 4.4 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Kumamoto by Month
The relative humidity is high throughout the year in Kumamoto.
The city experiences its highest humidity in June, reaching 76%. In April, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Kumamoto
The weather does bring rainfall during this period, between 95 mm (3.7 in) and 148 mm (5.8 in).
Plan accordingly for April, May, June, July and September, when conditions bring the heaviest precipitation. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Kumamoto
What is the best time to visit Kumamoto?
October typically offers the most optimal weather in Kumamoto. In contrast, February, June and July tend to have less optimal conditions. Kumamoto has a distinct rainy season from May to July.
What temperatures can I expect in Kumamoto?
Daytime highs range from 11°C (52°F) in January to 32°C (90°F) in August. Nighttime lows range from 3°C (37°F) to 24°C (75°F). Temperatures vary considerably through the year.
How much rain does Kumamoto get?
Annual rainfall is around 2037 mm (80 in). June is the wettest month with 436 mm (17 in), while January is the driest with 85 mm (3.3 in).
How sunny is Kumamoto?
Kumamoto receives around 2,014 hours of sunshine per year. August is the sunniest month with 208 hours, while June is the cloudiest with just 131 hours. Overall, Kumamoto enjoys abundant sunshine.
Kumamoto 3-Day Forecast
Kumamoto 3-Day Forecast
Kumamoto on the map
Kumamoto is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Osaka
32°C (90°F) Tokyo30°C (86°F) Naha
30°C (86°F) Kyoto31°C (88°F) Hakone28°C (82°F) Hakuba26°C (79°F) Sapporo24°C (75°F) Niseko24°C (75°F) 
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