Tsushima Weather in December
What's the weather like in Tsushima (Aichi) in December 2025?
The climate in Tsushima during December can be summarized as cool and reasonably dry.
December is in the winter in Tsushima and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 11°C (53°F), whilst at night 3°C (37°F) is normal.
| Daytime temperature | 11.4°C 52.5°F |
|---|---|
| Nightly temperature | 2.6°C 36.7°F |
| Average temperature | 7°C 44.6°F |
| Daily sunshine | 5.3 hrs |
| Avg rainfall | 56 mm 2.2 ins |
| Rainy days | 16 days |
| Sea temperature | 17.2°C 63°F |
| Humidity | 69% |
| Windspeed | 9kph 6 mph |
On average December is the driest month of the year in Tsushima with around 56mm 2.2 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 16 days, although this may vary considerably.
On the flip side this corresponds to an average of 5.3 hours of sunshine per day.
December temperatures in Tsushima
December rainfall
December hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Tsushima in December 2025.
Other monthly averages
Best places to visit in December
Tsushima weather stats
| Hottest month: | August | 32°C 89.6°F |
|---|---|---|
| Driest month: | December | 56mm 2.2ins |
| Sunniest month: | December | 5.3hrs |
| Coldest month: | January | 8.4°C 47.1°F |
| Wettest month: | June | 256mm 10.1ins |
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