Asahi Weather in September

September in Asahi brings high temperatures around 25°C (77°F) during the day, dropping to 19°C (66°F) at night, and as part of the rainy season, heavy rainfall is common.

Rainfall in Asahi in September

As part of the rainy season, Asahi sees around 20 days of rain in September, with an average of 253 mm (10 in). Rainy season showers tend to be fairly substantial. A good rain jacket or umbrella is worth having with you most days.

Temperature in Asahi in September

September in Asahi brings typical temperatures with highs around 25°C (77°F) and lows of 19°C (66°F). The month of September belongs to the summer season. This gives the month a fairly typical daily rhythm, with warmer afternoons and more comfortable nights. Nights cool down to 19°C (66°F), so a light jacket or extra layer is useful once the sun goes down. On the plus side, the cooler nights make for comfortable sleeping conditions.

Sunshine in Asahi in September

The month brings about 128 hours of sunlight, offering a comfortable mix of sun and rainy moments.

Should you favor a climate that's both dry and comfortably warm, May typically offers the most agreeable 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 Asahi's climate page.

Asahi Temperature in September

Min Temperature 19°C (66°F)  

Max Temperature 25°C (77°F)  

Chance of Rain 65%  

Precipitation 253 mm (10 in)  

Rainy days 20 days  

Sunshine 128 hours *  

Percentage Sunshine *  

* Data from: Itoigawa, Japan (24 KM, 15 Miles).

What to Wear in Asahi in September

Pleasant temperatures in September mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Heavy rain is guaranteed, please bring a good poncho and waterproof everything! Sunglasses could come in handy during the sunnier parts of your trip.

What To Do in Asahi in September

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

Swimming

7/10

Camping

6/10

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 Asahi's climate page.

More climate data for Asahi

Temperature Rainfall Sunshine

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