Kosai Weather in December

Kosai in December sees moderate temperatures, with highs around 14°C (57°F) and overnight lows of 5°C (41°F). It's the driest month of the year, with very little rainfall to worry about.

Rainfall in Kosai in December

This is the driest month of the year, though the temperatures are on the cooler side. Records from the past 30 years suggest around 10 days of rain, with 71 mm (2.8 in) average for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Kosai in December

In December, expect moderate temperatures in Kosai, with highs of 14°C (57°F) and lows of 5°C (41°F) at night. Winter occurs in December. Even when the weather is stable, mornings and evenings can still feel distinctly cool. Nights fall to 5°C (41°F), which is cold enough to feel it indoors too. A good thick duvet makes all the difference for a comfortable night's sleep.

Sunshine in Kosai in December

Expect a lot of sunshine this month, with about 203 hours of sun. These sunny conditions help offset the cool temperatures, making it a pleasant month to explore outdoors.

Our weather planner can help you find worldwide destinations with pleasant weather during this period. April and May typically offer the best weather for Kosai.

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Check the conditions for any month of the year.

• January
• February
• March
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• May
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• September
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• December

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

Kosai Temperature in December

Min Temperature 5°C (41°F)  

Max Temperature 14°C (57°F)  

Chance of Rain 33%  

Precipitation 71 mm (2.8 in)  

Rainy days 10 days  

Humidity 62% *  

Sunshine 203 hours *  

Percentage Sunshine *  

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

What to Wear in Kosai in December

Pack for changing conditions in Kosai in December. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Rain gear is recommended, you can expect wet weather on multiple days. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Kosai in December

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

Swimming

4/10

Cycling

6/10

Walking

6/10

Camping

4/10

Outdoor sports

9/10

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.