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Unzen Climate by Month

The temperature in Unzen can vary greatly throughout the year. The temperatures shift from very warm to cold. It also experiences much rainfall throughout the year. Now, let’s break down all the climate details for a clearer picture.

Average day and night temperature

Depending on the time of the year, temperatures range from very warm to chilly in Unzen. Average daytime temperatures reach a very warm 32°C in August. In January, the coolest month of the year, temperatures drop to a chilly 11°C. At night, expect cooler temperatures, averaging 5°C during this month.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Unzen has a relatively rainy climate with high precipitation levels, averaging 2207 mm of rainfall annually. Unzen can be quite wet during June, receiving approximately 453 mm of precipitation over 19 rainy days. In contrast January, experiences much drier conditions, with 80 mm of rainfall, spread across 19 rainy days.

The mean monthly precipitation over the year, including rain, hail and snow

Sunshine over the year

Unzen can be enjoyed more throughout the sunniest month of August under a blue sky, with approximately 7.0 hours of sunshine daily. In contrast, the city experiences much darker days in January, with only 3.5 hours of sunlight per day.

Monthly hours of sunshine

Data from: Nagasaki, Japan (32 KM, 19 Miles).

Daily hours of sunshine

Data from: Nagasaki, Japan (32 KM, 19 Miles).

The best time of year to visit Unzen in Japan

During the months of May and October you are most likely to experience good weather with pleasant average temperatures that fall between 20°C and 26°C.

Other facts from our historical weather data:
  • When is the rainy season in Unzen?
    Rainy season in Unzen occurs in the months of April, May, June, July, August and September.
  • Which is the warmest month in Unzen?
    August has an average maximum temperature of 32°C and is the warmest month of the year.
  • Which is the coldest month in Unzen?
    The coldest month is January with an average maximum temperature of 11°C.
  • Which is the wettest month in Unzen?
    June tops the wettest month list with 453 mm of rainfall.
  • Which is the driest month in Unzen?
    January is the driest month with 80 mm of precipitation.
  • Which is the sunniest month in Unzen?
    August is the sunniest month with an average of 209 hours of sunshine.

  • No idea where to travel to this year? We have a tool that recommends destinations based on your ideal conditions. Find out where to go with our weather planner.

    Forecast for Unzen

    Fri   Nov 22
    18°C | 10°C
    NW 18 km/h
    almost clear and no rain

    almost clear and no rain

    Sat   Nov 23
    15°C | 8°C
    NE 14 km/h
    almost clear and no rain

    almost clear and no rain

    Sun   Nov 24
    16°C | 8°C
    NE 22 km/h
    almost clear and no rain

    almost clear and no rain