Aso weather in September (Kumamoto, Japan)

What should you pack for a trip to Aso in September? Use this page to get an overview of the month’s weather conditions.

Temperatures

The month of September in Aso typically brings high temperatures and heavy rainfall. September is a notable month of the summer season. Throughout the daytime, temperatures often hover around 28°C. However, as the sun sets and evening approaches, there's a noticeable cool-down. Temperatures gently drop to a more temperate 18°C.

Precipitation

Aso in September falls under the rainy season with heavy rainfall, averaging around 192 mm for the month. According to historical climate patterns, there are usually around 18 days days of rain.

Average sunshine

The area enjoys a moderate level of sunlight, with around 177 hours. It's a good balance between sunny and cloudy days.

If your ideal day consists of dry skies and moderate temperatures May and October generally stand out with the best circumstances. While January, February, June and July tend to showcase less optimal conditions.

For an in-depth look at the yearly conditions, visit our specialized Aso climate page with graphs.

 

Aso, monthly averages in September

Min Temperature 18°C  

Max Temperature 28°C  

Chance of Rain 59%  

Precipitation 192 mm  

Rainy days 18 days  

Humidity 71% *  

Sunshine 177 hours *  

Percentage Sunshine *  

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

Where to go in Japan in September

Find out more about the weather in Japan and which places have the best travel conditions in this month.

Weather conditions Weather

Temperatures

Precipitation

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Legend perfect weather pleasant tolerable unpleasant poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C and 29°C and not too much precipitation (less than 90 mm a month).

So, what should you wear in this month?

It's going to be warm! Consider airy clothing, t-shirts, and other summer clothes. Shorts for men made of cotton or linen are good options for staying cool. However, there's a good chance of rain, so bring a raincoat just in case.

What To Do

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Interested in more climate information?

This site provides you with all the information you need about the climate in Aso.

Our site offers climate and forecast data for every country in the world. Are you going to Japan? On this website you can find historical weather averages for many cities in Japan. Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal travel conditions. Find out where to go with our weather planner.