Hamamatsu Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Hamamatsu.
Climate overview of Hamamatsu
Hamamatsu, Shizuoka, Japan, sees big temperature differences between seasons, with August peaking at 32°C (90°F) and January dropping to 11°C (52°F).
With around 2086 mm (82 in) of annual rainfall, Hamamatsu has a notably wet climate. However, this rainfall is not evenly distributed, the city has a distinct rainy season from April to July, with very warm summers and cold winters. The wettest month is June. August is the sunniest month, averaging 7.1 hours of sunshine per day.
Hamamatsu Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Hamamatsu - and find the best time to visit.
Monthly Temperature in Hamamatsu
Visitors to Hamamatsu can expect significant temperature changes throughout the year. Average daytime temperatures reach a very warm 32°C (90°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 11°C (52°F).
At night, temperatures range from around 25°C (77°F) in August to 3°C (37°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Hamamatsu
Hamamatsu is known for its substantial rainfall, with annual precipitation reaching 2086 mm (82 in). Hamamatsu can be quite wet during June, receiving approximately 276 mm (11 in) of precipitation over 18 rainy days.
In contrast, during the driest month (December), you will experience much drier conditions, with 75 mm (3 in) of precipitation spread across 10 rainy days. For more details, please visit our Hamamatsu 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 Hamamatsu
Hamamatsu experiences moderate variation in sunshine hours across the seasons. With 7.1 hours daily sunshine in August, it dips to 5.0 hours in June, offering a balanced mix of sunny and overcast days.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Hamamatsu by Month
The relative humidity is high throughout the year in Hamamatsu.
The city experiences its highest humidity in June, reaching 77%. In February, the humidity drops to its lowest level at 55%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Hamamatsu
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April
- Warmest weather: July and August
- Most sunshine: January, March, May, August and December
- Fewest rainy days: January, November and December
- Seasonal pattern: A distinct rainy season from April to July, with very warm summers and cold winters
Frequently asked questions about the climate in Hamamatsu
What is the best time to visit Hamamatsu?
April typically offers the most optimal weather in Hamamatsu. In contrast, February, June, July and September tend to have less optimal conditions. Hamamatsu has a distinct rainy season from April to July, with very warm summers and cold winters.
What temperatures can I expect in Hamamatsu?
Daytime highs range from 11°C (52°F) in January to 32°C (90°F) in August. Nighttime lows range from 3°C (37°F) to 25°C (77°F). Temperatures vary considerably through the year.
How much rain does Hamamatsu get?
Annual rainfall is around 2086 mm (82 in). June is the wettest month with 276 mm (11 in), while December is the driest with 75 mm (3 in).
How sunny is Hamamatsu?
Hamamatsu receives around 2,256 hours of sunshine per year. August is the sunniest month with 212 hours, while June is the cloudiest with just 151 hours. Overall, Hamamatsu enjoys abundant sunshine.
Hamamatsu 3-Day Forecast
Hamamatsu on the map
Hamamatsu is highlighted - select any city to see its climate.
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