Unzen Weather in September

During September, Unzen experiences high daytime temperatures of 29°C (84°F) and cooler nights around 22°C (72°F). September sits within the rainy season, so expect regular and often heavy rainfall.

Rainfall in Unzen in September

As part of the rainy season, Unzen sees around 17 days of rain in September, with an average of 215 mm (8.5 in). Rain during the rainy season is significant rather than just light drizzle. Expect proper showers on most rainy days.

Temperature in Unzen in September

Expect highs of 29°C (84°F) in Unzen in September, with nights dropping to around 22°C (72°F). Overall, the month follows a fairly predictable daily temperature pattern. With lows of 22°C (72°F), the nights are warm and generally comfortable.

Sunshine in Unzen in September

The area experiences a moderate amount of sunshine, with approximately 173 hours of sunlight expected. Even though this month is part of the rainy season, you could still see the sun every now and then.

If you prefer enjoying temperate temperatures and rain-free days, April 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.

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For a detailed overview over the year and the best time to visit Japan, check out our Unzen's climate page.

Unzen Temperature in September

Min Temperature 22°C (72°F)  

Max Temperature 29°C (84°F)  

Chance of Rain 57%  

Precipitation 215 mm (8.5 in)  

Rainy days 17 days  

Humidity 74% *  

Sunshine 173 hours *  

Percentage Sunshine 46% *  

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

What to Wear in Unzen in September

Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Also bring a poncho, it will rain a lot! Waterproof everything you can. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Unzen 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

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Japan, check out our Unzen's climate page.

More climate data for Unzen

Temperature Rainfall Sunshine Humidity

See the full Unzen climate overview or explore weather in Japan.