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Ryūgasaki, Japan climate
Cfa Humid subtropical
Ryūgasaki has a seasonal mild-temperate climate (Humid subtropical, Köppen Cfa). The hottest month is August with an average daily high near 31°C, while the coldest is January averaging around −3°C at night. Precipitation totals about 1326 mm a year and is strongly seasonal — October alone averages 193 mm while February barely receives 47 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)Ryūgasaki climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 19 | 23 | 25 | 29 | 31 | 27 | 21 | 16 | 12 |
| Avg temp (°C) | 3 | 4 | 8 | 13 | 17 | 21 | 25 | 26 | 22 | 17 | 11 | 5 |
| Avg low (°C) | −3 | −2 | 2 | 7 | 12 | 17 | 21 | 22 | 19 | 12 | 5 | −1 |
| Precipitation (mm) | 51 | 47 | 96 | 110 | 130 | 132 | 135 | 118 | 188 | 193 | 79 | 48 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 19 | 23 | 25 |
| Avg temp (°C) | 3 | 4 | 8 | 13 | 17 | 21 |
| Avg low (°C) | −3 | −2 | 2 | 7 | 12 | 17 |
| Precipitation (mm) | 51 | 47 | 96 | 110 | 130 | 132 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 27 | 21 | 16 | 12 |
| Avg temp (°C) | 25 | 26 | 22 | 17 | 11 | 5 |
| Avg low (°C) | 21 | 22 | 19 | 12 | 5 | −1 |
| Precipitation (mm) | 135 | 118 | 188 | 193 | 79 | 48 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 62 | 65 | 66 | 70 | 80 | 78 | 68 | 74 | 69 | 62 | 57 |
| Relative humidity (%) | 75 | 74 | 74 | 74 | 76 | 79 | 80 | 80 | 81 | 81 | 79 | 77 |
| Wind speed (km/h) | 8.8 | 9.6 | 10.2 | 10.6 | 10.0 | 9.0 | 9.2 | 8.7 | 9.1 | 8.6 | 7.7 | 8.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 58 | 62 | 65 | 66 | 70 | 80 |
| Relative humidity (%) | 75 | 74 | 74 | 74 | 76 | 79 |
| Wind speed (km/h) | 8.8 | 9.6 | 10.2 | 10.6 | 10.0 | 9.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 78 | 68 | 74 | 69 | 62 | 57 |
| Relative humidity (%) | 80 | 80 | 81 | 81 | 79 | 77 |
| Wind speed (km/h) | 9.2 | 8.7 | 9.1 | 8.6 | 7.7 | 8.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Tateno, about 18 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.