Home › Cities › Japan › Nankoku
Nankoku, Japan climate
Cfa Humid subtropical
Nankoku has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 32°C, while the coldest is January averaging around 1°C at night. Precipitation totals about 2359 mm a year and is strongly seasonal — September alone averages 336 mm while January barely receives 52 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)Nankoku climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 12 | 16 | 20 | 24 | 26 | 30 | 32 | 29 | 24 | 19 | 14 |
| Avg temp (°C) | 6 | 7 | 11 | 15 | 19 | 23 | 26 | 27 | 24 | 19 | 14 | 8 |
| Avg low (°C) | 1 | 2 | 5 | 10 | 15 | 19 | 23 | 24 | 21 | 15 | 9 | 3 |
| Precipitation (mm) | 52 | 95 | 153 | 196 | 239 | 316 | 319 | 278 | 336 | 180 | 117 | 77 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 12 | 12 | 16 | 20 | 24 | 26 |
| Avg temp (°C) | 6 | 7 | 11 | 15 | 19 | 23 |
| Avg low (°C) | 1 | 2 | 5 | 10 | 15 | 19 |
| Precipitation (mm) | 52 | 95 | 153 | 196 | 239 | 316 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 30 | 32 | 29 | 24 | 19 | 14 |
| Avg temp (°C) | 26 | 27 | 24 | 19 | 14 | 8 |
| Avg low (°C) | 23 | 24 | 21 | 15 | 9 | 3 |
| Precipitation (mm) | 319 | 278 | 336 | 180 | 117 | 77 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 66 | 72 | 83 | 75 | 66 | 72 | 65 | 65 | 65 |
| Relative humidity (%) | 80 | 77 | 75 | 75 | 78 | 83 | 86 | 83 | 80 | 77 | 78 | 80 |
| Wind speed (km/h) | 15.4 | 15.4 | 15.2 | 13.8 | 12.3 | 11.2 | 11.1 | 11.6 | 12.5 | 13.4 | 13.0 | 14.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 68 | 69 | 68 | 66 | 72 | 83 |
| Relative humidity (%) | 80 | 77 | 75 | 75 | 78 | 83 |
| Wind speed (km/h) | 15.4 | 15.4 | 15.2 | 13.8 | 12.3 | 11.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 66 | 72 | 65 | 65 | 65 |
| Relative humidity (%) | 86 | 83 | 80 | 77 | 78 | 80 |
| Wind speed (km/h) | 11.1 | 11.6 | 12.5 | 13.4 | 13.0 | 14.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Gomen, about 2 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.