Kumamoto

Hondomachi-hondo, Japan Climate

NASA POWER reanalysis for the half-degree grid cell around Hondomachi-hondo, 1991-2020; a grid cell is an area average and can differ from a thermometer in town by several degrees

The warmest month is August, with an average high of 30°C; the coldest is January, with an average low of 7°C. A normal year brings 2098 mm of precipitation.

Temperature through the year

The normal daily high and low. The line marks today.

Normal daily high and low temperature at Hondomachi-hondo through the year, in °C, with the record for each date.-10010203040JanFebMarAprMayJunJulAugSepOctNovDec
  • Normal low
  • Normal high
  • Reanalysis extreme high
  • Reanalysis extreme low

Normals for Sep 27

Normal high
26°C
Normal low
21°C
Reanalysis high
30°Cin 2016
Reanalysis low
18°Cin 1992
Chance of a wet day
38%
Daylight
12 h 00 min

Month by month

Averages for 1991-2020. Wet days have at least 1 mm of precipitation in the reanalysis. Each month links to its own page.

MonthAvg highAvg lowWarmestColdestPrecipitationWet days
January11°C7°C19°C (1997)0°C (2011)71 mm9.3
February12°C7°C19°C (2009)0°C (2013)93 mm11.3
March15°C10°C22°C (2007)2°C (2006)140 mm12.4
April18°C13°C26°C (1998)7°C (1996)168 mm12.0
May22°C17°C29°C (2000)11°C (2013)189 mm12.4
June25°C21°C30°C (1996)16°C (2010)384 mm18.0
July28°C25°C34°C (1994)19°C (1992)332 mm18.6
August30°C26°C34°C (2013)21°C (2002)217 mm15.5
September27°C23°C32°C (2010)18°C (1992)207 mm15.0
October23°C19°C29°C (2016)10°C (1997)102 mm9.3
November18°C14°C25°C (2011)6°C (1993)108 mm9.0
December13°C9°C22°C (2004)1°C (2005)87 mm9.3
Year20°C16°C2098 mm152

Precipitation

Rain and melted snow together. The chance of a wet day is the share of days with at least 1 mm of precipitation in the reanalysis.

2098 mm in a normal year, most in June.

Chance of a wet day

The chance of at least 1 mm of precipitation in the reanalysis on each date at Hondomachi-hondo, in percent.020406080JanFebMarAprMayJunJulAugSepOctNovDec
  • Chance of a wet day

Humidity and comfort

NASA POWER reanalysis, 1991-2020, for the grid cell around Hondomachi-hondo.

The muggiest month is July, when 100 percent of days are muggy or worse, with a mean dew point of 18°C or more.

MonthDew pointHumidityDryComfortableHumidMuggyOppressiveMiserable
January5°C76%98%2%0%0%0%0%
February5°C74%95%4%0%0%0%0%
March7°C74%89%10%1%0%0%0%
April11°C76%61%25%13%1%0%0%
May16°C80%15%30%38%15%1%0%
June20°C86%0%2%21%43%29%5%
July24°C87%0%0%0%6%34%60%
August24°C83%0%0%0%3%25%72%
September21°C81%0%3%11%30%37%18%
October16°C77%17%24%35%17%6%1%
November12°C75%65%20%11%4%0%0%
December7°C75%95%4%1%0%0%0%

Comfort is judged by the day's mean dew point: dry below 13°C, comfortable to 16°C, humid to 18°C, muggy to 21°C, oppressive to 24°C, miserable above.

Clouds

Average share of the sky covered, from satellite (CERES and GEWEX SRB) by way of NASA POWER, 1991-2020.

The clearest month is October, with the sky 55 percent covered on average; the cloudiest is June, at 81 percent.

Wind

The mean wind speed over the whole day, from the MERRA-2 reanalysis by way of NASA POWER. Gusts run well above it.

The windiest month is January, averaging 18.4 km/h at 10 meters (33 feet) above the ground.

Daylight and sunshine

The longest day is Jun 20, with 14 h 18 min of daylight; the shortest is Dec 17, with 10 h 01 min.

Hours of daylight at Hondomachi-hondo through the year.0510152025JanFebMarAprMayJunJulAugSepOctNovDec
  • Day length

Solar energy

Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.

Sunrise and sunset calendar

Month pages

The weather in Hondomachi-hondo in each month, day by day.

What this means

A normal is the average of the thirty years 1991 to 2020, the period the World Meteorological Organization and NOAA use for comparison. It is an average, not a forecast: most days depart from it, and some by a long way.

Where no station record is within reach, the extremes shown are the highest and lowest the reanalysis produced for the date in 1991-2020, not measured records.

Cloud, humidity, wind and sunshine come from a reanalysis: a weather model run over the past with every observation fed in, averaged over a grid cell about 50 km across. It is consistent everywhere on Earth; it smooths local detail such as a lake shore or a valley.

More for this place

Nearby

Sources

Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.