Okayama 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
Poor
Best time to visit: April – June, September – November
What is the weather like in Okayama in January?
In January, Okayama is cold: daytime highs average 9 °C, and nights cool down to about 2 °C. The sea averages 13.0 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 54 mm in total. All in all, January is not an ideal month for a holiday in Okayama.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 41 | 29 | 36 |
| Day | 11° | 9° | 10° |
| Night | 4° | 2° | 2° |
| Sea | 16° | 13° | 12° |
| Sun | 5 h | 5 h | 5 h |
| Rain days | 9 | 10 | 9 |
More details for January
- Daylight
- 10 h 4 min07:11 – 17:15
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 53 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC+9Asia/Tokyo
How the score comes together
- Temperatureweight 50 %9 %
- Sunshineweight 20 %35 %
- Few rainy daysweight 30 %58 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in January
- Warm jacket
- Rain jacket or umbrella
Okayama in January: quick answers
Is Okayama hot in January?
No. In January, Okayama is cold: daytime highs average 9 °C and nights drop to about 2 °C.
Can you swim in Okayama in January?
Only if you don't mind cold water: in January the sea averages just 13.0 °C. Comfortable swimming is possible from June to October.
Does it rain much in Okayama in January?
Rain is frequent, with about 10 rainy days and 54 mm in total.
Okayama month by month
The whole year in OkayamaAll 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