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Yokosuka Weather by Month
Average temperatures, rainfall and humidity for Yokosuka, Japan, month by month, built from OpenWeather's historical records. Use it to see what a typical Yokosuka month looks like before you travel — then check the live Yokosuka forecast for the days ahead.
Warmest month
August
32°C average high
Coolest month
January
6°C average low
Wettest month
February
52 mm of rain
Driest month
July
3 mm of rain
Average temperature and rainfall in Yokosuka by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 15°C | 6°C | -2°C / 24°C | 37 mm | 75% | 15 km/h |
| February | 16°C | 7°C | 0°C / 24°C | 52 mm | 72% | 15 km/h |
| March | 17°C | 8°C | 1°C / 26°C | 38 mm | 73% | 14 km/h |
| April | 20°C | 10°C | 3°C / 31°C | 16 mm | 71% | 13 km/h |
| May | 24°C | 14°C | 6°C / 35°C | 21 mm | 69% | 12 km/h |
| June | 29°C | 18°C | 11°C / 40°C | 16 mm | 64% | 11 km/h |
| July | 32°C | 21°C | 15°C / 45°C | 3 mm | 61% | 11 km/h |
| August | 32°C | 22°C | 16°C / 42°C | 6 mm | 64% | 11 km/h |
| September | 29°C | 19°C | 11°C / 40°C | 26 mm | 69% | 12 km/h |
| October | 24°C | 16°C | 8°C / 35°C | 51 mm | 74% | 12 km/h |
| November | 20°C | 13°C | 3°C / 28°C | 50 mm | 76% | 13 km/h |
| December | 17°C | 8°C | -1°C / 26°C | 24 mm | 75% | 14 km/h |
Best time to visit Yokosuka
The most comfortable time to visit Yokosuka is generally April to May and October, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around February, totalling about 341 mm a year.
Travellers who prefer heat should aim for August, when highs average 32°C. February is the month to avoid if rain would spoil your plans — it averages 52 mm, roughly 15× the rainfall of July.
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Yokosuka forecast for what is happening now.