Hamamatsu weather in December 2025

Expect daytime maximum temperatures of 12°C in Hamamatsu 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 47 mm of rainfall in the month.

  • 12°C maximum daytime temperature in December in Hamamatsu12
    12°C max day temperature
  • 6 hours of sunshine per day
  • 10 days with some rainfall in December in Hamamatsu10
    10 days with some rainfall
  • 4°C minimum night-time temperature in December in Hamamatsu4
    4°C min night temperature
  • 10 hours of daylight per day in December in Hamamatsu10
    10 hours of daylight per day
  • No heat & humidity in December in Hamamatsu0
    No heat & humidity
  • 47 mm monthly rainfall in December in Hamamatsu47
    47 mm of monthly rainfall
  • UV (maximum) index 2 (Low) in December in Hamamatsu2
    2 (Low) UV index
  • 20°C sea temperature in December in Hamamatsu20
    20°C 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 / mm)  |  Imperial (°F / inches)

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How warm is it in Hamamatsu in December?

Daytime temperatures usually reach 12°C in Hamamatsu in December, falling to 4°C at night.

How sunny is it in Hamamatsu in December?

There are normally 6 hours of bright sunshine each day in Hamamatsu in December - that's 60% of daylight hours.

How warm is the sea around Hamamatsu in December?

The average sea temperature around Hamamatsu in December is 20°C.

Does it rain in Hamamatsu in December?

There are usually 10 days with some rain in Hamamatsu in December and the average monthly rainfall is 47mm.

Hamamatsu December sunrise & sunset times

Browse the sunrise and sunset times for Hamamatsu in December 2025. Select a month to view Hamamatsu sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st December 2025 06:38 16:38
Tuesday, 16th December 2025 06:49 16:40
Wednesday, 31st December 2025 06:56 16:48

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