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Yokosuka, Japan climate
Cfa Humid subtropical
Yokosuka 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. Around 1731 mm of precipitation falls each year, peaking in September (242 mm) and easing off in January (65 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)Yokosuka climate normals (1991–2020)
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 14 | 19 | 23 | 26 | 29 | 31 | 27 | 22 | 17 | 13 |
| Avg temp (°C) | 6 | 7 | 10 | 15 | 19 | 22 | 26 | 27 | 24 | 19 | 13 | 9 |
| Avg low (°C) | 3 | 3 | 6 | 11 | 16 | 19 | 23 | 24 | 21 | 16 | 10 | 5 |
| Precipitation (mm) | 65 | 65 | 139 | 143 | 153 | 189 | 182 | 139 | 242 | 240 | 108 | 66 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Avg high (°C) | 10 | 11 | 14 | 19 | 23 | 26 |
| Avg temp (°C) | 6 | 7 | 10 | 15 | 19 | 22 |
| Avg low (°C) | 3 | 3 | 6 | 11 | 16 | 19 |
| Precipitation (mm) | 65 | 65 | 139 | 143 | 153 | 189 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Avg high (°C) | 29 | 31 | 27 | 22 | 17 | 13 |
| Avg temp (°C) | 26 | 27 | 24 | 19 | 13 | 9 |
| Avg low (°C) | 23 | 24 | 21 | 16 | 10 | 5 |
| Precipitation (mm) | 182 | 139 | 242 | 240 | 108 | 66 |
Sky & atmosphere
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 52 | 60 | 64 | 70 | 82 | 75 | 64 | 71 | 67 | 56 | 45 |
| Relative humidity (%) | 77 | 76 | 77 | 77 | 79 | 83 | 84 | 82 | 84 | 84 | 82 | 79 |
| Wind speed (mph) | 5.5 | 6.0 | 6.4 | 6.5 | 5.9 | 5.2 | 5.5 | 5.2 | 5.4 | 5.3 | 5.0 | 5.1 |
| Jan – Jun | Jan | Feb | Mar | Apr | May | Jun |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 46 | 52 | 60 | 64 | 70 | 82 |
| Relative humidity (%) | 77 | 76 | 77 | 77 | 79 | 83 |
| Wind speed (mph) | 5.5 | 6.0 | 6.4 | 6.5 | 5.9 | 5.2 |
| Jul – Dec | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|
| Cloud cover (%) | 75 | 64 | 71 | 67 | 56 | 45 |
| Relative humidity (%) | 84 | 82 | 84 | 84 | 82 | 79 |
| Wind speed (mph) | 5.5 | 5.2 | 5.4 | 5.3 | 5.0 | 5.1 |
Methodology & sources
Temperature & precipitation — the official 1991–2020 climate normals from the Japan Meteorological Agency, measured at Yokohama, 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.