Kosai Weather in September

Kosai in September averages 29°C (84°F) during the day and 22°C (72°F) at night. Keep in mind that quite a bit of rainfall is expected this month.

Rainfall in Kosai in September

You can expect rain on around 18 days based on historical patterns, with 256 mm (10 in) average 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 Kosai in September

Daytime temperatures in Kosai reach 29°C (84°F) in September, dropping to 22°C (72°F) at night. This kind of day-to-night contrast is typical for this time of year. With lows of 22°C (72°F), the nights are warm and generally comfortable.

Sunshine in Kosai in September

The city usually sees around 169 hours of sunlight, indicating a moderately sunny period.

For Kosai itself, April and May 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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• January
• February
• March
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• May
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• October
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For a detailed overview over the year and the best time to visit Japan, check out our Kosai's climate page.

Kosai Temperature in September

Min Temperature 22°C (72°F)  

Max Temperature 29°C (84°F)  

Chance of Rain 58%  

Precipitation 256 mm (10 in)  

Rainy days 18 days  

Humidity 74% *  

Sunshine 169 hours *  

Percentage Sunshine *  

* Data from: Hamamatsu, Japan (18 KM, 11 Miles).

What to Wear in Kosai 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 Kosai 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 Kosai's climate page.

More climate data for Kosai

Temperature Rainfall Sunshine Humidity

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