Weatheo

Sasebo Weather by Month

Average temperatures, rainfall and humidity for Sasebo, Japan, month by month, built from OpenWeather’s historical records. Use it to see what a typical Sasebo month looks like before you travel — then check the live Sasebo forecast for the days ahead.

Warmest month

August

32°C average high

Coolest month

January

4°C average low

Wettest month

June

156 mm of rain

Driest month

January

47 mm of rain

Average temperature and rainfall in Sasebo by month

Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.

MonthAvg highAvg lowRecord low / highRainfallHumidityWind
January11°C4°C-7°C / 19°C
47 mm
73%15 km/h
February11°C4°C-5°C / 21°C
72 mm
73%15 km/h
March15°C8°C0°C / 24°C
90 mm
73%14 km/h
April20°C12°C3°C / 27°C
115 mm
73%13 km/h
May24°C16°C8°C / 32°C
82 mm
75%12 km/h
June26°C20°C14°C / 32°C
156 mm
83%11 km/h
July30°C25°C19°C / 36°C
153 mm
83%12 km/h
August32°C25°C19°C / 38°C
128 mm
79%12 km/h
September29°C22°C12°C / 37°C
121 mm
80%12 km/h
October24°C17°C7°C / 32°C
63 mm
74%13 km/h
November18°C11°C0°C / 26°C
62 mm
73%13 km/h
December13°C5°C-4°C / 23°C
50 mm
71%15 km/h

Best time to visit Sasebo

The most comfortable time to visit Sasebo is generally May and October to November, balancing mild daytime temperatures against the driest stretch of the year. The city has strongly marked seasons and rain concentrates around June, totalling about 1,141 mm a year.

Travellers who prefer heat should aim for August, when highs average 32°C. June is the month to avoid if rain would spoil your plans — it averages 156 mm, roughly 3× the rainfall of the driest month (January).

Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Sasebo forecast for what is happening now.

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