ClimateForecastDecemberJanuary >>

Aso Climate by Month

The temperature in Aso can vary greatly throughout the year. The temperatures shift from very warm to cold. It is also known for its large amounts of rain/snowfall. 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 Aso. Typically, daytime temperatures range from a very warm 31°C in August to a chilly 9°C in the coolest month, January. Nights are cooler, with temperatures generally dropping to -1°C, particularly during the colder months.

The mean minimum and maximum temperatures throughout the year

Precipitation and rainy days

Aso has a relatively rain/snowy climate with high precipitation levels, averaging 1994 mm of rain/snowfall annually. The climate in Aso shows significant variation throughout the year. Expect heavy rainfall in June, with an average of 413 mm of precipitation over 19 rainy days.

In contrast, December offers drier and sunnier days, with around 73 mm of rainfall over 16 rainy days.

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

Sunshine over the year

Aso offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between August (6.9 hours daily) and June (4.4 hours daily) provides a bit of variety for visitors and residents.

Monthly hours of sunshine

Data from: Kumamoto, Japan (39 KM, 24 Miles).

Daily hours of sunshine

Data from: Kumamoto, Japan (39 KM, 24 Miles).

The best time of year to visit Aso in Japan

During the months of May, June 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 summer in Aso?
    The hottest season / summer takes place in June, July, August and September.
  • Which months have the greatest rainfall in Aso?
    Most rainfall (rainy season) is seen in April, May, June, July, August and September.
  • Which is the warmest month in Aso?
    August has an average maximum temperature of 31°C and is the warmest month of the year.
  • Which is the coldest month in Aso?
    The coldest month is January with an average maximum temperature of 9°C.
  • Which is the wettest month in Aso?
    June tops the wettest month list with 413 mm of rainfall.
  • Which is the driest month in Aso?
    December is the driest month with 73 mm of precipitation.
  • Which is the sunniest month in Aso?
    August is the sunniest month with an average of 208 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 Aso

    Sat   Dec 14
    5°C | -2°C
    NW 22 km/h
    almost clear and no rain

    almost clear and no rain

    Sun   Dec 15
    5°C | -4°C
    W 25 km/h
    0.3 mm
    partly cloudy and  chance of slight rain

    partly cloudy and chance of slight rain

    Mon   Dec 16
    5°C | -2°C
    NW 14 km/h
    overcast and no rain

    overcast and no rain