Hamamatsu weather in December 2026

Q: How warm is it in Hamamatsu in December?

Daytime temperatures usually reach 12°C in Hamamatsu in December, falling to 3°C at night.

Q: How sunny is it in Hamamatsu in December?

There are normally 6 hours of bright sunshine each day in Hamamatsu in December - that's 57% of daylight hours.

Q: How warm is the sea around Hamamatsu in December?

The average sea temperature around Hamamatsu in December is 17°C.

Q: Does it rain in Hamamatsu in December?

There are usually 9 days with some rain in Hamamatsu in December and the average monthly rainfall is 44mm.

Expect daytime maximum temperatures of 54°F in Hamamatsu, Japan in December based on long-term weather averages. There are 6 hours of sunshine per day on average with 10 days with some rainfall and typically 1.9 inches of rainfall in the month.

54
54°F max day temperature
6
6 hours of sunshine per day
10
10 days with some rainfall
39
39°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
1.9
1.9 inches of monthly rainfall
2
2 (Low) UV index
68
68°F sea temperature

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The December weather guide for Japan (Hamamatsu) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)