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Honmachi, Kumamoto Weather by Month and Climate Averages
Monthly normals · Rain · Snow
Sunshine · Freeze dates · Records · Best time to visit
What is the weather like in Honmachi, Kumamoto?
Honmachi, Kumamoto gets 2260 mm of precipitation a year over about 109 rainy days. August is the warmest month (average high 32°C) and January the coldest (average low -1°C).
Humid subtropical climate
Honmachi, Kumamoto has hot summers and chilly winters. Daytime highs range from about 10°C in January to 32°C in August. June is usually the wettest month. The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 22°C.
| Season | Months | Avg low | Avg high |
|---|---|---|---|
| Winter | Dec–Feb | 0° | 12° |
| Spring | Mar–May | 8° | 21° |
| Summer | Jun–Aug | 21° | 31° |
| Autumn | Sep–Nov | 13° | 24° |
How much rain does Honmachi get?
Honmachi gets 2260 mm of precipitation in an average year, spread over about 109 days with measurable rain. That is fewer rainy days than 54% of Japan.
June is the wettest month, with 518 mm. January is the driest, with 66 mm. June has the most rainy days, about 14.
The longest dry spell in the last five years lasted 15 days, to December 17, 2024.
From October 2025 to September 2026 Honmachi got 2986 mm of rain, against a normal of 2260 mm for those months. September 2026 had the most, with 1323 mm.
Honmachi weather by month
Honmachi weather in January
In January, Honmachi averages a high of 11°C and a low of -1°C. It gets 66 mm of precipitation over about 7 rainy days. Estimated sunshine is 42% of daylight hours, derived from ERA5 cloud cover. The January record high is 21°C (2002) and the record low is -10°C (2016).
Honmachi weather in February
In February, Honmachi averages a high of 13°C and a low of 0°C. It gets 105 mm of precipitation over about 9 rainy days. Estimated sunshine is 39% of daylight hours, derived from ERA5 cloud cover. The February record high is 24°C (1979) and the record low is -9°C (2012).
Honmachi weather in March
In March, Honmachi averages a high of 16°C and a low of 3°C. It gets 133 mm of precipitation over about 9 rainy days. Estimated sunshine is 37% of daylight hours, derived from ERA5 cloud cover. The March record high is 27°C (2013) and the record low is -6°C (1984).
Honmachi weather in April
In April, Honmachi averages a high of 21°C and a low of 8°C. It gets 152 mm of precipitation over about 9 rainy days. Estimated sunshine is 35% of daylight hours, derived from ERA5 cloud cover. The April record high is 31°C (2004) and the record low is -3°C (1972). April is one of the most comfortable months to visit.
Honmachi weather in May
In May, Honmachi averages a high of 26°C and a low of 13°C. It gets 184 mm of precipitation over about 8 rainy days. Estimated sunshine is 29% of daylight hours, derived from ERA5 cloud cover. The May record high is 34°C (2019) and the record low is 3°C (1981). May is one of the most comfortable months to visit.
Honmachi weather in June
In June, Honmachi averages a high of 28°C and a low of 18°C. It gets 518 mm of precipitation over about 14 rainy days. Estimated sunshine is 18% of daylight hours, derived from ERA5 cloud cover. The June record high is 36°C (2022) and the record low is 9°C (1981).
Honmachi weather in July
In July, Honmachi averages a high of 31°C and a low of 22°C. It gets 454 mm of precipitation over about 13 rainy days. Estimated sunshine is 24% of daylight hours, derived from ERA5 cloud cover. The July record high is 38°C (2026) and the record low is 15°C (1982).
Honmachi weather in August
In August, Honmachi averages a high of 32°C and a low of 22°C. It gets 182 mm of precipitation over about 10 rainy days. Estimated sunshine is 40% of daylight hours, derived from ERA5 cloud cover. The August record high is 39°C (2026) and the record low is 16°C (2002).
Honmachi weather in September
In September, Honmachi averages a high of 29°C and a low of 19°C. It gets 205 mm of precipitation over about 10 rainy days. Estimated sunshine is 38% of daylight hours, derived from ERA5 cloud cover. The September record high is 36°C (2024) and the record low is 8°C (1987).
Honmachi weather in October
In October, Honmachi averages a high of 24°C and a low of 13°C. It gets 101 mm of precipitation over about 6 rainy days. Estimated sunshine is 53% of daylight hours, derived from ERA5 cloud cover. The October record high is 33°C (2016) and the record low is -1°C (1970). October is one of the most comfortable months to visit.
Honmachi weather in November
In November, Honmachi averages a high of 18°C and a low of 7°C. It gets 89 mm of precipitation over about 8 rainy days. Estimated sunshine is 48% of daylight hours, derived from ERA5 cloud cover. The November record high is 27°C (2023) and the record low is -4°C (1973). November is one of the most comfortable months to visit.
Honmachi weather in December
In December, Honmachi averages a high of 12°C and a low of 1°C. It gets 72 mm of precipitation over about 7 rainy days. Estimated sunshine is 46% of daylight hours, derived from ERA5 cloud cover. The December record high is 23°C (2018) and the record low is -8°C (1973).
Sunshine, humidity and wind in Honmachi
October is the sunniest month in Honmachi, with estimated sunshine of 53% of daylight hours from ERA5 cloud cover. June is the cloudiest, at 18%. The annual cloud-cover estimate is 37% of daylight hours; it is not a measurement of sunshine duration. Honmachi is cloudier than 58% of Japan.
Humidity peaks in July at 82% and is lowest in April at 70%.
Honmachi has about 33 days a year above 32°C. Honmachi is hotter than 87% of Japan.
First and last freeze in Honmachi
The first fall freeze in Honmachi typically comes around November 30, and the last spring freeze around March 26. That leaves a frost-free growing season of about 249 days.
Honmachi weather records
These records cover HITOYOSHI during 1970–2026. Earlier records or other stations in the city may differ.
The hottest temperature on record at the Honmachi station is 39°C, on August 2, 2026. The coldest is -10°C, on January 25, 2016.
The wettest day in the available station history brought 328 mm of precipitation, on July 22, 2006.
53 all-time records have been set at the station since 1970.
The best time to visit Honmachi
The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 22°C.
Winter (December–February) is chilly, with average highs around 12°C and lows near 0°C.
Spring (March–May) is warm, with average highs around 21°C and lows near 8°C.
Summer (June–August) is hot, with average highs around 30°C and lows near 21°C. It can feel humid.
Autumn (September–November) is warm, with average highs around 24°C and lows near 13°C.
Monthly climate
| Month | Average low | Average high | Precip | Rain days | Humidity | Estimated sunshine | Record high | Record low |
|---|---|---|---|---|---|---|---|---|
| January | -1° | 11° | 66 mm | 7 | 73% | 42% | 21° | -10° |
| February | 0° | 13° | 105 mm | 9 | 72% | 39% | 24° | -9° |
| March | 3° | 16° | 133 mm | 9 | 72% | 37% | 27° | -6° |
| April | 8° | 21° | 152 mm | 9 | 70% | 35% | 31° | -3° |
| May | 13° | 26° | 184 mm | 8 | 74% | 29% | 34° | 3° |
| June | 18° | 28° | 518 mm | 14 | 81% | 18% | 36° | 9° |
| July | 22° | 31° | 454 mm | 13 | 82% | 24% | 38° | 15° |
| August | 22° | 32° | 182 mm | 10 | 78% | 40% | 39° | 16° |
| September | 19° | 29° | 205 mm | 10 | 78% | 38% | 36° | 8° |
| October | 13° | 24° | 101 mm | 6 | 73% | 53% | 33° | -1° |
| November | 7° | 18° | 89 mm | 8 | 74% | 48% | 27° | -4° |
| December | 1° | 12° | 72 mm | 7 | 71% | 46% | 23° | -8° |
Station: HITOYOSHI, 35 km from the city. Temperature normal baseline: 1991–2020, calculated from available NOAA GHCN-Daily observations. Available station history: 1970–2026; record values refer to this station and period, not the entire city’s history. Precipitation includes rain and the water equivalent of frozen precipitation; snowfall depth is shown separately when available. Sources and methods
From ERA5 reanalysis. Sunshine is estimated from cloud cover.
Honmachi climate questions
How much rain does Honmachi get?
Honmachi gets 2260 mm of precipitation in an average year, over about 109 rainy days.
What is the wettest month in Honmachi?
June is the wettest month in Honmachi, with 518 mm. January is the driest, with 66 mm.
How many rainy days does Honmachi have a year?
Honmachi has about 109 days with measurable rain in an average year. June has the most, about 14.
What is the hottest month in Honmachi?
August is the warmest month in Honmachi, with an average high of 32°C.
What is the coldest month in Honmachi?
January is the coldest month in Honmachi, with an average low of -1°C.
What is the record high temperature in Honmachi?
Within the available 1970–2026 station history, the record high at the Honmachi station is 39°C, set on August 2, 2026. The record low is -10°C, on January 25, 2016.
What is the sunniest month in Honmachi?
October is the sunniest month in Honmachi, with estimated sunshine of 53% of daylight hours from ERA5 cloud cover. June is the cloudiest.
When is the first frost in Honmachi?
The first fall freeze in Honmachi typically comes around November 30. The last spring freeze is around March 26.
What is the best time to visit Honmachi?
The most comfortable time to visit is typically April to May and October to November, when daytime highs sit near 22°C.