Onna Weather in September

Onna in September sees high daytime temperatures of 29°C (84°F) and nighttime lows of 27°C (81°F). Rainfall is fairly high this month at around 199 mm (7.8 in), so pack a rain jacket to stay dry.

Rainfall in Onna in September

Typically, about 20 days will experience rainfall, with an average of 199 mm (7.8 in) for the month. Wet weather is a regular and significant part of this month. Frequent days of rain combined with high totals means proper waterproofs are worth packing.

Temperature in Onna in September

September in Onna brings typical temperatures with highs around 29°C (84°F) and lows of 27°C (81°F). The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. At 27°C (81°F) overnight, the heat doesn't let up much after dark. If you're staying somewhere without air conditioning, a cold shower before bed and keeping the air moving can help.

Sunshine in Onna in September

There are approximately 190 hours of sunshine this month, resulting in mostly clear days.

For Onna itself, January, February, March, April, October, November and December generally stand out with 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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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 Onna's climate page.

Onna Temperature in September

Min Temperature 27°C (81°F)  

Max Temperature 29°C (84°F)  

Chance of Rain 65%  

Precipitation 199 mm (7.8 in)  

Rainy days 20 days  

Humidity 76% *  

Sunshine 190 hours *  

Percentage Sunshine *  

* Data from: Naha, Japan (36 KM, 22 Miles).

What to Wear in Onna 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. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.

What To Do in Onna 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

7/10

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 Onna's climate page.

More climate data for Onna

Temperature Rainfall Sunshine Humidity

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