Kai, Japan climate
Cfa Humid subtropical
Kai has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 33°C, while the coldest is January averaging around −2°C at night. Precipitation totals about 1161 mm a year and is strongly seasonal — September alone averages 179 mm while December barely receives 38 mm.
Temperature & precipitation
Daily high–low temperature range with the monthly average, plus monthly precipitation · 1991–2020 normals · hover a month for the exact figuresHours of sunshine per day
Estimated sunny hours each month — daylight length × clear-sky fraction · 1991–2020 monthly cloud cover (NASA POWER)Kai climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 15 | 21 | 25 | 28 | 32 | 33 | 29 | 23 | 17 | 11 |
| Avg temp (°C) | 3 | 5 | 9 | 14 | 19 | 22 | 26 | 27 | 23 | 17 | 11 | 5 |
| Avg low (°C) | −2 | −1 | 3 | 8 | 14 | 18 | 22 | 23 | 19 | 13 | 6 | 0 |
| Precipitation (mm) | 43 | 44 | 86 | 80 | 85 | 113 | 149 | 133 | 179 | 158 | 53 | 38 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 11 | 15 | 21 | 25 | 28 |
| Avg temp (°C) | 3 | 5 | 9 | 14 | 19 | 22 |
| Avg low (°C) | −2 | −1 | 3 | 8 | 14 | 18 |
| Precipitation (mm) | 43 | 44 | 86 | 80 | 85 | 113 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 33 | 29 | 23 | 17 | 11 |
| Avg temp (°C) | 26 | 27 | 23 | 17 | 11 | 5 |
| Avg low (°C) | 22 | 23 | 19 | 13 | 6 | 0 |
| Precipitation (mm) | 149 | 133 | 179 | 158 | 53 | 38 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 62 | 66 | 72 | 83 | 78 | 69 | 73 | 67 | 55 | 49 |
| Relative humidity (%) | 80 | 78 | 78 | 77 | 78 | 82 | 83 | 83 | 85 | 85 | 83 | 81 |
| Wind speed (km/h) | 4.6 | 5.0 | 5.1 | 5.0 | 4.3 | 3.6 | 3.5 | 3.4 | 3.7 | 3.6 | 3.7 | 4.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 50 | 55 | 62 | 66 | 72 | 83 |
| Relative humidity (%) | 80 | 78 | 78 | 77 | 78 | 82 |
| Wind speed (km/h) | 4.6 | 5.0 | 5.1 | 5.0 | 4.3 | 3.6 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 69 | 73 | 67 | 55 | 49 |
| Relative humidity (%) | 83 | 83 | 85 | 85 | 83 | 81 |
| Wind speed (km/h) | 3.5 | 3.4 | 3.7 | 3.6 | 3.7 | 4.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kofu, about 4 km from the city centre.
Cloud, humidity, wind & sunshine — modelled estimates from NASA POWER, NASA's satellite-and-reanalysis climatology. This is the standard global source for atmospheric variables, which are not measured at most weather stations.