Kaseda-shirakame, Japan Climate
The warmest month is August, with an average high of 30°C; the coldest is January, with an average low of 5°C. A normal year brings 2486 mm of precipitation.
Temperature through the year
The normal daily high and low. The line marks today.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
Normals for Sep 26
- Normal high
- 27°C
- Normal low
- 21°C
- Reanalysis high
- 29°Cin 2003
- Reanalysis low
- 17°Cin 1993
- Chance of a wet day
- 49%
- Daylight
- 12 h 02 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 | Warmest | Coldest | Precipitation | Wet days |
|---|---|---|---|---|---|---|
| January | 12°C | 5°C | 21°C (1998) | -2°C (2016) | 84 mm | 9.3 |
| February | 13°C | 6°C | 22°C (2010) | -2°C (2012) | 110 mm | 11.3 |
| March | 16°C | 9°C | 24°C (2007) | 1°C (2016) | 164 mm | 12.4 |
| April | 20°C | 13°C | 25°C (1998) | 4°C (1993) | 195 mm | 12.0 |
| May | 23°C | 17°C | 30°C (2019) | 10°C (1991) | 214 mm | 12.4 |
| June | 26°C | 21°C | 30°C (2004) | 15°C (1994) | 528 mm | 21.0 |
| July | 29°C | 25°C | 33°C (2004) | 19°C (1992) | 350 mm | 18.6 |
| August | 30°C | 25°C | 35°C (2020) | 20°C (2002) | 233 mm | 18.6 |
| September | 28°C | 23°C | 32°C (2011) | 15°C (1995) | 264 mm | 15.0 |
| October | 24°C | 18°C | 30°C (2016) | 7°C (1997) | 140 mm | 12.4 |
| November | 19°C | 13°C | 27°C (2003) | 2°C (1992) | 114 mm | 9.0 |
| December | 14°C | 8°C | 23°C (2018) | -2°C (2005) | 90 mm | 9.3 |
| Year | 21°C | 15°C | 2486 mm | 161 |
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.
2486 mm in a normal year, most in June.
Chance of a wet day
- Chance of a wet day
Humidity and comfort
NASA POWER reanalysis, 1991-2020, for the grid cell around Kaseda-shirakame.
The muggiest month is July, 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 | 5°C | 77% | 96% | 3% | 0% | 0% | 0% | 0% |
| February | 5°C | 76% | 92% | 7% | 1% | 0% | 0% | 0% |
| March | 8°C | 75% | 86% | 11% | 3% | 0% | 0% | 0% |
| April | 12°C | 76% | 55% | 26% | 14% | 5% | 0% | 0% |
| May | 16°C | 79% | 15% | 26% | 35% | 19% | 4% | 0% |
| June | 20°C | 85% | 0% | 2% | 20% | 34% | 33% | 9% |
| July | 24°C | 86% | 0% | 0% | 0% | 4% | 37% | 59% |
| August | 24°C | 83% | 0% | 0% | 0% | 3% | 37% | 60% |
| September | 21°C | 80% | 0% | 3% | 11% | 26% | 40% | 19% |
| October | 16°C | 77% | 18% | 25% | 30% | 18% | 9% | 1% |
| November | 12°C | 76% | 63% | 20% | 13% | 5% | 0% | 0% |
| December | 7°C | 77% | 93% | 6% | 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 56 percent covered on average; the cloudiest is June, at 83 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 20.2 km/h at 10 meters (33 feet) above the ground.
Daylight and sunshine
The longest day is Jun 18, with 14 h 12 min of daylight; the shortest is Dec 17, with 10 h 06 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 Kaseda-shirakame 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.