Usuki, Japan climate
Cfa Humid subtropical
Usuki has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 90°F, while the coldest is January averaging around 31°F at night. Precipitation totals about 71 inches a year and is strongly seasonal — June alone averages 12.8 inches while December barely receives 1.85 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)Usuki climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 53 | 60 | 70 | 77 | 81 | 89 | 90 | 83 | 74 | 64 | 55 |
| Avg temp (°F) | 40 | 42 | 48 | 57 | 65 | 71 | 78 | 80 | 73 | 63 | 53 | 44 |
| Avg low (°F) | 31 | 32 | 38 | 46 | 55 | 64 | 71 | 72 | 66 | 54 | 44 | 34 |
| Precipitation (in) | 1.9 | 2.5 | 3.9 | 4.4 | 5.2 | 12.8 | 11.3 | 8.1 | 10.7 | 5.2 | 2.7 | 1.8 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°F) | 51 | 53 | 60 | 70 | 77 | 81 |
| Avg temp (°F) | 40 | 42 | 48 | 57 | 65 | 71 |
| Avg low (°F) | 31 | 32 | 38 | 46 | 55 | 64 |
| Precipitation (in) | 1.9 | 2.5 | 3.9 | 4.4 | 5.2 | 12.8 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°F) | 89 | 90 | 83 | 74 | 64 | 55 |
| Avg temp (°F) | 78 | 80 | 73 | 63 | 53 | 44 |
| Avg low (°F) | 71 | 72 | 66 | 54 | 44 | 34 |
| Precipitation (in) | 11.3 | 8.1 | 10.7 | 5.2 | 2.7 | 1.8 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 72 | 68 | 66 | 70 | 82 | 74 | 65 | 69 | 62 | 65 | 70 |
| Relative humidity (%) | 78 | 76 | 75 | 76 | 79 | 84 | 85 | 84 | 83 | 79 | 78 | 78 |
| Wind speed (mph) | 5.9 | 5.7 | 5.3 | 4.4 | 3.5 | 2.9 | 2.7 | 3.0 | 3.8 | 4.6 | 5.0 | 5.7 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 72 | 68 | 66 | 70 | 82 |
| Relative humidity (%) | 78 | 76 | 75 | 76 | 79 | 84 |
| Wind speed (mph) | 5.9 | 5.7 | 5.3 | 4.4 | 3.5 | 2.9 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 65 | 69 | 62 | 65 | 70 |
| Relative humidity (%) | 85 | 84 | 83 | 79 | 78 | 78 |
| Wind speed (mph) | 2.7 | 3.0 | 3.8 | 4.6 | 5.0 | 5.7 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Inukai, about 17 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.