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Aso Weather in September

September in Aso brings high temperatures around 28°C (82°F) during the day, dropping to 18°C (64°F) at night, and as part of the rainy season, heavy rainfall is common.

Rainfall in Aso in September

Aso is in the rainy season in September, with rain on around 18 days and an average of 192 mm (7.6 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Aso in September

September in Aso brings high temperatures, with highs of 28°C (82°F) and nights around 18°C (64°F). September is typically considered a summer month. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. With lows of 18°C (64°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Aso in September

The month experiences a moderate amount of sunlight, with 177 hours of sunshine. This provides a nice balance between sunshine and rain.

If you prefer dry days with pleasant temperatures, May and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

Aso Temperature in September

Min Temperature
18°C (64°F)
Max Temperature
28°C (82°F)
Chance of Rain
59%
Precipitation
192 mm (7.6 in)
Rainy days
18 days
Humidity
71% *
Sunshine
177 hours *
Percentage Sunshine
*
* Data from: Kumamoto, Japan (39 KM, 24 Miles).

Aso Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Aso - and find the best time to visit.

Best Places in Japan in September

Find out more about the weather in Japan and which places have the best travel conditions in this month. See all of Japan in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Aso in September

Warm but pleasant conditions in Aso in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. It's going to pour! Pack a good poncho and prepare for very wet conditions. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Aso in September

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

Aso 3-Day Forecast

More climate data for Aso

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.