Minami Aso Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Minami Aso.
Climate overview of Minami Aso
Minami Aso, Kumamoto, Japan, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 9°C (48°F).
The city receives considerable rain/snowfall, with around 1998 mm (79 in) annually. June is the wettest month. It has a distinct rainy season from May to July, with very warm summers and cold winters. Sunshine peaks in August, when the city sees around 6.9 hours of sunshine per day.
Minami Aso Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Minami Aso - and find the best time to visit.
Monthly Temperature in Minami Aso
Visitors to Minami Aso can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 9°C (48°F) in the coolest month, January.
Nights vary from 22°C (72°F) in August to around -1°C (30°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Minami Aso
Minami Aso is known for its substantial rain/snowfall, with annual precipitation reaching 1998 mm (79 in). The climate in Minami Aso shows significant variation throughout the year. Expect heavy rainfall in June, the wettest month, with an average of 418 mm (16 in) of precipitation over 20 rainy days.
In contrast, the driest month December offers drier and sunnier days, with around 77 mm (3 in) of rainfall over 15 rainy days. For more details, please visit our Minami Aso 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 Minami Aso
Minami 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.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Minami Aso by Month
The relative humidity is high throughout the year in Minami Aso.
The city experiences its highest humidity in June, reaching 76%. In April, the humidity drops to its lowest level at 65%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Minami Aso
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: April, May and October
- Warmest weather: July and August
- Most sunshine: August
- Fewest rainy days: October and November
- Wettest months: May, June, July, August and September, when rainfall is highest.
- Seasonal pattern: A distinct rainy season from May to July, with very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -1°C (30°F).
Frequently asked questions about the climate in Minami Aso
What is the best time to visit Minami Aso?
April, May and October typically offer the most optimal weather in Minami Aso. In contrast, January, February, June and July tend to have less optimal conditions. Minami Aso has a distinct rainy season from May to July, with very warm summers and cold winters.
What temperatures can I expect in Minami Aso?
Daytime highs range from 9°C (48°F) in January to 31°C (88°F) in August. Nighttime lows range from -1°C (30°F) to 22°C (72°F). Temperatures vary considerably through the year.
How much rain does Minami Aso get?
Annual rainfall is around 1998 mm (79 in). June is the wettest month with 418 mm (16 in), while December is the driest with 77 mm (3 in).
How sunny is Minami Aso?
Minami Aso receives around 2,014 hours of sunshine per year. August is the sunniest month with 208 hours, while June is the cloudiest with just 131 hours. Overall, Minami Aso enjoys abundant sunshine.
Minami Aso 3-Day Forecast
Minami Aso on the map
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