Home › Cities › Japan › Tsushima
Tsushima, Japan climate
Cfa Humid subtropical
Tsushima 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 0°C at night. Precipitation totals about 1730 mm a year and is strongly seasonal — September alone averages 244 mm while January barely receives 57 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)Tsushima climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 20 | 24 | 27 | 31 | 33 | 29 | 23 | 17 | 11 |
| Avg temp (°C) | 4 | 5 | 8 | 14 | 19 | 23 | 27 | 28 | 24 | 18 | 12 | 7 |
| Avg low (°C) | 0 | 1 | 4 | 9 | 14 | 19 | 23 | 24 | 20 | 14 | 7 | 2 |
| Precipitation (mm) | 57 | 68 | 123 | 149 | 175 | 213 | 223 | 164 | 244 | 167 | 82 | 64 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 20 | 24 | 27 |
| Avg temp (°C) | 4 | 5 | 8 | 14 | 19 | 23 |
| Avg low (°C) | 0 | 1 | 4 | 9 | 14 | 19 |
| Precipitation (mm) | 57 | 68 | 123 | 149 | 175 | 213 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 31 | 33 | 29 | 23 | 17 | 11 |
| Avg temp (°C) | 27 | 28 | 24 | 18 | 12 | 7 |
| Avg low (°C) | 23 | 24 | 20 | 14 | 7 | 2 |
| Precipitation (mm) | 223 | 164 | 244 | 167 | 82 | 64 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 72 | 69 | 66 | 69 | 80 | 77 | 66 | 71 | 66 | 67 | 72 |
| Relative humidity (%) | 81 | 78 | 76 | 76 | 78 | 82 | 83 | 82 | 81 | 80 | 80 | 82 |
| Wind speed (m/s) | 3.6 | 3.7 | 3.6 | 3.2 | 2.8 | 2.4 | 2.3 | 2.3 | 2.6 | 2.7 | 2.9 | 3.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 72 | 69 | 66 | 69 | 80 |
| Relative humidity (%) | 81 | 78 | 76 | 76 | 78 | 82 |
| Wind speed (m/s) | 3.6 | 3.7 | 3.6 | 3.2 | 2.8 | 2.4 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 77 | 66 | 71 | 66 | 67 | 72 |
| Relative humidity (%) | 83 | 82 | 81 | 80 | 80 | 82 |
| Wind speed (m/s) | 2.3 | 2.3 | 2.6 | 2.7 | 2.9 | 3.4 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Aisai, about 6 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.