The highest day temperature in January 2026 was 59°F. The lowest night temperature was 31°F. The average values for day and night temperatures during January were 46.0°F и 37.7°F respectivly.

The average sea surface temperature in January 2026 for Osaka was 53.1°F. The maximum and minimum values were 47.8°F and 57.8°F respectively.

Most of the days in January are cloudy but you can also expect sunny or gloomy days.

Precipitation total in January for Osaka is 1.3 in. It makes january the least rainy month of the year.

The average wind speed in January is 7.4 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Osaka in January is 5.6 hours.