Yokosuka Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Yokosuka.
Climate overview of Yokosuka
Yokosuka, Kanagawa, Japan, sees big temperature differences between seasons, with August peaking at 29°C (84°F) and January dropping to 11°C (52°F).
The city has a wet climate, receiving around 1735 mm (68 in) of rainfall per year. Despite the high annual total, it has warm summers and cold winters. October is the wettest month. The sunniest month is August, with 6.9 hours of sunshine per day on average.
Yokosuka Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Yokosuka - and find the best time to visit.
Monthly Temperature in Yokosuka
Visitors to Yokosuka can expect significant temperature changes throughout the year. On average, daytime temperatures range from a comfortable 29°C (84°F) in August to a chilly 11°C (52°F) in January.
Nighttime temperatures range from 25°C (77°F) in August to 5°C (41°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Yokosuka
Yokosuka is known for its substantial rainfall, with annual precipitation reaching 1735 mm (68 in). The seasons in Yokosuka bring significant changes in precipitation. The wettest month, October, receives heavy rainfall, with an average of 227 mm (8.9 in) of precipitation. This rainfall is distributed across 17 rainy days.
In contrast, the driest month, December, experiences much less rainfall, totaling 77 mm (3 in) over 10 rainy days. These distinct seasonal differences provide diverse experiences throughout the year. For more details, please visit our Yokosuka Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Yokosuka
Yokosuka enjoys sunny spells year-round. August sees up to 6.9 hours of daily sunshine, perfect for a sunny trip. September, the least sunny month, still offers a generous 4.4 hours of sun despite this cloudier time of the year.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Yokosuka by Month
The relative humidity is high throughout the year in Yokosuka.
The city experiences its highest humidity in June, reaching 78%. In January, the humidity drops to its lowest level at 54%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Yokosuka
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May, July and August
- Warmest weather: August
- Most sunshine: August
- Fewest rainy days: January, February and December
- Seasonal pattern: Warm summers and cold winters
Frequently asked questions about the climate in Yokosuka
What is the best time to visit Yokosuka?
May, July and August typically offer the most optimal weather in Yokosuka. In contrast, February tends to have less optimal conditions. Yokosuka has warm summers and cold winters.
What temperatures can I expect in Yokosuka?
Daytime highs range from 11°C (52°F) in January to 29°C (84°F) in August. Nighttime lows range from 5°C (41°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Yokosuka get?
Annual rainfall is around 1735 mm (68 in). October is the wettest month with 227 mm (8.9 in), while December is the driest with 77 mm (3 in).
How sunny is Yokosuka?
Yokosuka receives around 1,973 hours of sunshine per year. August is the sunniest month with 208 hours, while September is the cloudiest with just 131 hours.
Yokosuka 3-Day Forecast
Yokosuka on the map
Yokosuka is highlighted - select any city to see its climate.
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