Numazu Weather in December
What's the weather like in Numazu (Shizuoka) in December 2025?
The climate in Numazu during December can be summarized as cool and reasonably dry.
December is in the winter in Numazu and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around a cool 13°C (55°F), whilst at night 3°C (37°F) is normal.
| Daytime temperature | 12.8°C 55°F |
|---|---|
| Nightly temperature | 3°C 37.4°F |
| Average temperature | 7.9°C 46.2°F |
| Daily sunshine | 6 hrs |
| Avg rainfall | 58 mm 2.3 ins |
| Rainy days | 8 days |
| Sea temperature | 18.8°C 65.9°F |
| Humidity | 65% |
| Windspeed | 9.4kph 6 mph |
On average December is the driest month of the year in Numazu with around 58mm 2.3 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 8 days, although this may vary considerably.
On the flip side this corresponds to an average of 6 hours of sunshine per day.
December temperatures in Numazu
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 Numazu in December 2025.
Other monthly averages
Best places to visit in December
Numazu weather stats
| Hottest month: | August | 29.9°C 85.8°F |
|---|---|---|
| Driest month: | December | 58mm 2.3ins |
| Sunniest month: | December | 6hrs |
| Coldest month: | January | 10°C 50°F |
| Wettest month: | June | 259mm 10.2ins |
© Google
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