The highest day temperature in January 2026 was 58°F. The lowest night temperature was 29°F. The average values for day and night temperatures during January were 45.5°F и 37.0°F respectivly.

The average sea surface temperature in January 2026 for Atami was 61.5°F. The maximum and minimum values were 58.8°F and 65.6°F respectively.

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

Precipitation total in January for Atami is 2.6 in. It makes january the least rainy month of the year.

The average wind speed in January is 7.7 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 Atami in January is 6.8 hours.