Kumamoto Temperature by Month

Kumamoto in Kumamoto, Japan sees significant seasonal temperature differences, with daytime highs between 11°C (52°F) in January and 32°C (90°F) in August, averaging 21°C (70°F) annually. Explore the full monthly breakdown below.

In Kumamoto, temperatures differ significantly between summer and winter months. Nighttime lows reflect this range, dropping from 24°C (75°F) in August to 3°C (37°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in Kumamoto by month:

Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM. August, the warmest month, sees 208 hours of sunshine.

The chart below shows the average temperature throughout the year:

Kumamoto's average annual maximum temperature is 21°C (70°F). To put that in context, here's how it compares to a few well-known destinations:

Barcelona, Spain has an annual average of around 21°C (70°F), with warm summers and mild, fairly short winters.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Buenos Aires, Argentina averages 23°C (73°F) a year, with hot summers and mild winters, and seasons reversed compared to Europe.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In the cooler months, when temperatures drop below 10°C, high humidity makes the cold feel more cutting than it would in dry conditions.

In Kumamoto, January is the coolest month, with average highs of 11°C (52°F) and humidity around 70%, considered high. In August, the warmest month, temperatures average 32°C (90°F) with 72% humidity, conditions that feel high. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

Whether a city sits on the coast or deep inland makes a significant difference to its climate. Coastal areas tend to have more stable temperatures year-round, large bodies of water absorb heat slowly in summer and release it gradually in winter, keeping extremes in check. Cities far from the sea don't benefit from that buffer, which is why continental climates tend to have hotter summers and colder winters than their coastal counterparts at the same latitude.

For more on Kumamoto's weather, including monthly rainfall, sunshine hours, and humidity, visit our Kumamoto climate page.