Kotō, Japan climate
Cfa Humid subtropical
Kotō has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 92°F, while the coldest is January averaging around 35°F at night. Precipitation totals about 79 inches a year and is strongly seasonal — June alone averages 17.7 inches while January barely receives 2.25 inches.
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)Kotō climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 54 | 61 | 71 | 79 | 83 | 89 | 92 | 86 | 77 | 66 | 55 |
| Avg temp (°F) | 43 | 45 | 52 | 60 | 69 | 75 | 82 | 83 | 77 | 67 | 56 | 46 |
| Avg low (°F) | 35 | 37 | 43 | 51 | 60 | 68 | 76 | 77 | 70 | 59 | 48 | 38 |
| Precipitation (in) | 2.3 | 3.3 | 4.9 | 5.7 | 6.3 | 17.7 | 15.2 | 7.7 | 6.8 | 3.4 | 3.3 | 2.4 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 54 | 61 | 71 | 79 | 83 |
| Avg temp (°F) | 43 | 45 | 52 | 60 | 69 | 75 |
| Avg low (°F) | 35 | 37 | 43 | 51 | 60 | 68 |
| Precipitation (in) | 2.3 | 3.3 | 4.9 | 5.7 | 6.3 | 17.7 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 92 | 86 | 77 | 66 | 55 |
| Avg temp (°F) | 82 | 83 | 77 | 67 | 56 | 46 |
| Avg low (°F) | 76 | 77 | 70 | 59 | 48 | 38 |
| Precipitation (in) | 15.2 | 7.7 | 6.8 | 3.4 | 3.3 | 2.4 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 67 | 66 | 64 | 68 | 81 | 70 | 62 | 63 | 55 | 60 | 66 |
| Relative humidity (%) | 81 | 79 | 78 | 78 | 79 | 84 | 86 | 84 | 84 | 82 | 81 | 81 |
| Wind speed (mph) | 3.4 | 3.5 | 3.3 | 2.9 | 2.4 | 2.2 | 2.3 | 2.2 | 2.6 | 2.8 | 2.9 | 3.2 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 71 | 67 | 66 | 64 | 68 | 81 |
| Relative humidity (%) | 81 | 79 | 78 | 78 | 79 | 84 |
| Wind speed (mph) | 3.4 | 3.5 | 3.3 | 2.9 | 2.4 | 2.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 70 | 62 | 63 | 55 | 60 | 66 |
| Relative humidity (%) | 86 | 84 | 84 | 82 | 81 | 81 |
| Wind speed (mph) | 2.3 | 2.2 | 2.6 | 2.8 | 2.9 | 3.2 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Kumamoto, about 5 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.