Hamamatsu weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Fair
Best time to visit: April – June, October – November
What is the weather like in Hamamatsu in January?
In January, Hamamatsu is cold: daytime highs average 10 °C, and nights cool down to about 2 °C. The sea averages 16.5 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 6 days, adding up to 67 mm. All in all, January is a so-so month for a holiday in Hamamatsu.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 55 | 44 | 48 |
| Day | 12° | 10° | 11° |
| Night | 4° | 2° | 2° |
| Sea | 19° | 17° | 16° |
| Sun | 6 h | 6 h | 6 h |
| Rain days | 6 | 6 | 7 |
More details for January
- Daylight
- 10 h 4 min06:56 – 17:00
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 35 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %15 %
- Sunshineweight 20 %55 %
- Few rainy daysweight 30 %86 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in January
- Warm jacket
Hamamatsu in January: quick answers
Is Hamamatsu hot in January?
No. In January, Hamamatsu is cold: daytime highs average 10 °C and nights drop to about 2 °C.
Can you swim in Hamamatsu in January?
Only if you don't mind cold water: in January the sea averages just 16.5 °C. Comfortable swimming is possible from June to November.
Does it rain much in Hamamatsu in January?
Rain falls on about 6 days, adding up to 67 mm.
Hamamatsu month by month
The whole year in HamamatsuAll destinations: JapanWhere to go in JanuarySea temperature in January
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences