Ashiya, Japan Climate
Temperature through the year
The normal daily high and low and the record for every date at Fukuoka, since 1951. The line marks today.
- Normal low
- Normal high
- Record high
- Record low
Normals for Sep 27
- Normal high
- 27°C
- Record high
- 33°Cin 2007
- Record low
- 12°Cin 1962
- Chance of a wet day
- 37%
- Daylight
- 11 h 59 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.
| Month | Avg high | Avg low | Record high | Record low | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 10°C | 20°C (1957) | -5°C (1970) | 78 mm | 12.4 | |
| February | 12°C | 24°C (2004) | -5°C (1977) | 79 mm | 11.3 | |
| March | 15°C | 27°C (2025) | -4°C (1994) | 124 mm | 12.4 | |
| April | 20°C | 30°C (2004) | 0°C (1965) | 144 mm | 12.0 | |
| May | 24°C | 32°C (1998) | 5°C (1965) | 158 mm | 12.4 | |
| June | 27°C | 37°C (2004) | 11°C (1959) | 273 mm | 15.0 | |
| July | 31°C | 38°C (2018) | 14°C (1966) | 307 mm | 18.6 | |
| August | 32°C | 38°C (2018) | 15°C (1956) | 195 mm | 15.5 | |
| September | 29°C | 37°C (1990) | 10°C (1965) | 192 mm | 15.0 | |
| October | 24°C | 32°C (1999) | 5°C (1955) | 96 mm | 9.3 | |
| November | 18°C | 28°C (2011) | -1°C (1953) | 87 mm | 9.0 | |
| December | 13°C | 26°C (2018) | -3°C (1964) | 74 mm | 9.3 | |
| Year | 21°C | 1807 mm | 152 |
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.
1807 mm in a normal year, most in July.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Ashiya.
The muggiest month is August, when 100 percent of days are muggy or worse, with a mean dew point of 18°C or more.
| Month | Dew point | Humidity | Dry | Comfortable | Humid | Muggy | Oppressive | Miserable |
|---|---|---|---|---|---|---|---|---|
| January | 3°C | 73% | 100% | 0% | 0% | 0% | 0% | 0% |
| February | 3°C | 72% | 99% | 1% | 0% | 0% | 0% | 0% |
| March | 6°C | 72% | 97% | 3% | 0% | 0% | 0% | 0% |
| April | 10°C | 75% | 77% | 20% | 3% | 0% | 0% | 0% |
| May | 14°C | 79% | 27% | 41% | 27% | 5% | 0% | 0% |
| June | 19°C | 84% | 0% | 8% | 34% | 41% | 17% | 0% |
| July | 23°C | 85% | 0% | 0% | 1% | 15% | 52% | 32% |
| August | 24°C | 82% | 0% | 0% | 0% | 7% | 35% | 58% |
| September | 20°C | 79% | 0% | 7% | 18% | 33% | 33% | 8% |
| October | 15°C | 74% | 29% | 33% | 24% | 12% | 3% | 0% |
| November | 10°C | 72% | 78% | 14% | 6% | 1% | 0% | 0% |
| December | 5°C | 73% | 98% | 1% | 0% | 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 62 percent covered on average; the cloudiest is June, at 79 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 22.7 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 17, with 14 h 25 min of daylight; the shortest is Dec 16, with 9 h 54 min.
- Day length
Solar energy
Average daily sunshine reaching the ground on a flat surface, in kilowatt-hours per square meter, clouds included.
Month pages
The weather in Ashiya 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.
A record is the highest or lowest value on the date in every year the station has reported, back to 1951. It rests on one station, so a neighbor a few miles away can hold different ones.
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
Records: NOAA GHCN-Daily, station JA000047807, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: 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.