Kasai, Japan climate
Cfa Humid subtropical
Kasai 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 −1°C at night. Precipitation totals about 1445 mm a year and is strongly seasonal — July alone averages 207 mm while January barely receives 42 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)Kasai climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 20 | 25 | 28 | 32 | 33 | 29 | 23 | 17 | 11 |
| Avg temp (°C) | 4 | 4 | 8 | 13 | 18 | 22 | 26 | 27 | 24 | 18 | 11 | 6 |
| Avg low (°C) | −1 | 0 | 3 | 8 | 13 | 18 | 23 | 23 | 19 | 13 | 7 | 2 |
| Precipitation (mm) | 42 | 56 | 107 | 128 | 154 | 183 | 207 | 133 | 189 | 118 | 72 | 55 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 20 | 25 | 28 |
| Avg temp (°C) | 4 | 4 | 8 | 13 | 18 | 22 |
| Avg low (°C) | −1 | 0 | 3 | 8 | 13 | 18 |
| Precipitation (mm) | 42 | 56 | 107 | 128 | 154 | 183 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 32 | 33 | 29 | 23 | 17 | 11 |
| Avg temp (°C) | 26 | 27 | 24 | 18 | 11 | 6 |
| Avg low (°C) | 23 | 23 | 19 | 13 | 7 | 2 |
| Precipitation (mm) | 207 | 133 | 189 | 118 | 72 | 55 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 87 | 84 | 81 | 80 | 81 | 84 | 86 | 84 | 85 | 84 | 85 | 87 |
| Wind speed (m/s) | 2.0 | 2.2 | 2.4 | 2.2 | 1.9 | 1.7 | 1.7 | 1.6 | 1.8 | 1.8 | 1.7 | 1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 73 | 68 | 65 | 67 | 78 |
| Relative humidity (%) | 87 | 84 | 81 | 80 | 81 | 84 |
| Wind speed (m/s) | 2.0 | 2.2 | 2.4 | 2.2 | 1.9 | 1.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 72 | 62 | 69 | 66 | 70 | 73 |
| Relative humidity (%) | 86 | 84 | 85 | 84 | 85 | 87 |
| Wind speed (m/s) | 1.7 | 1.6 | 1.8 | 1.8 | 1.7 | 1.8 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Fukusaki, about 9 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.