Home › Cities › Japan › Ryōgoku
Ryōgoku, Japan climate
Cfa Humid subtropical
Ryōgoku 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 −2°C at night. Precipitation totals about 1498 mm a year and is strongly seasonal — October alone averages 258 mm while January barely receives 64 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)Ryōgoku climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 18 | 23 | 25 | 29 | 31 | 27 | 22 | 17 | 12 |
| Avg temp (°C) | 4 | 5 | 8 | 13 | 18 | 21 | 25 | 26 | 23 | 17 | 12 | 7 |
| Avg low (°C) | −2 | −1 | 3 | 7 | 13 | 17 | 21 | 22 | 19 | 13 | 7 | 1 |
| Precipitation (mm) | 64 | 70 | 102 | 125 | 129 | 144 | 116 | 122 | 195 | 258 | 106 | 68 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 9 | 10 | 14 | 18 | 23 | 25 |
| Avg temp (°C) | 4 | 5 | 8 | 13 | 18 | 21 |
| Avg low (°C) | −2 | −1 | 3 | 7 | 13 | 17 |
| Precipitation (mm) | 64 | 70 | 102 | 125 | 129 | 144 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 27 | 22 | 17 | 12 |
| Avg temp (°C) | 25 | 26 | 23 | 17 | 12 | 7 |
| Avg low (°C) | 21 | 22 | 19 | 13 | 7 | 1 |
| Precipitation (mm) | 116 | 122 | 195 | 258 | 106 | 68 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 65 | 70 | 69 | 72 | 81 | 74 | 60 | 71 | 72 | 68 | 62 |
| Relative humidity (%) | 73 | 72 | 73 | 76 | 79 | 84 | 85 | 83 | 82 | 80 | 77 | 75 |
| Wind speed (km/h) | 15.5 | 15.8 | 15.9 | 15.3 | 13.8 | 12.0 | 12.0 | 11.6 | 13.4 | 13.8 | 13.4 | 14.5 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 61 | 65 | 70 | 69 | 72 | 81 |
| Relative humidity (%) | 73 | 72 | 73 | 76 | 79 | 84 |
| Wind speed (km/h) | 15.5 | 15.8 | 15.9 | 15.3 | 13.8 | 12.0 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 74 | 60 | 71 | 72 | 68 | 62 |
| Relative humidity (%) | 85 | 83 | 82 | 80 | 77 | 75 |
| Wind speed (km/h) | 12.0 | 11.6 | 13.4 | 13.8 | 13.4 | 14.5 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Narita, 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.