Hot
Average highs reach 33°C, so days can feel very hot.
Weather Guide
Kumamoto, Japan Average Monthly Weather
Weather score38Poor annual avg
Best months: September, October, August
Across the year, average daytime temperatures are around 22°C, sunshine averages 5.1h per day, and rainfall totals about 2017mm. Sea temperatures average 20°C across the year.
Annual weather
Annual averages
Temp
22°C
Rain
2017mm
Annual total
Sun
5.1h
Sea
20°C
Weather score
38
Poor avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Wet
Rainfall averages 197mm, so showers are a real planning factor.
Some sun
Sunshine averages 6.6h per day, enough for a balanced month.
Warm sea
Sea temperatures average 28°C, so swimming is usually comfortable by monthly-average standards.
Map
Weather map
Compare Kumamoto, Japan with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August33°C average high
August is one of Kumamoto's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August197mm average rain
August sits near Kumamoto's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsJanuary to April and September to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August6.6 hours average sun
August is one of Kumamoto's sunniest months, with some of the strongest bright-day conditions in the yearly averages.
Brightest monthsMay and July to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
August28°C average sea
August is one of Kumamoto's warmest sea months, when swimming comfort is usually strongest.
Warmest seaJuly to September
Sea temperatures are usually near 25°C in this stretch, so swimming comfort is at its strongest.
Weather score
August54 weather score
August scores above Kumamoto's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsAugust to October
These months have the strongest weather score in the monthly averages.
Hotels near Kumamoto, Japan
Marriott
Fairfield by Marriott Kumamoto AsoAso, Kumamoto, Japan
Fairfield by Marriott Fukuoka UkihaUkiha, Fukuoka, Japan
Fairfield by Marriott Saga Ureshino OnsenUreshino, Saga, Japan
Nagasaki Marriott HotelNagasaki, Nagasaki, Japan
Four Points Flex by Sheraton Fukuoka HakataFukuoka, Fukuoka, Japan
The Ritz-Carlton, FukuokaFukuoka, Japan