The highest day temperature in January 2026 was 82°F. The lowest night temperature was 54°F. The average values for day and night temperatures during January were 77.9°F и 63.3°F respectivly.

The average sea surface temperature in January 2026 for Sanya was 77.5°F. The maximum and minimum values were 76.2°F and 79.2°F respectively.

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

Precipitation total in January for Sanya is 0.3 in. It makes january the least rainy month of the year.

The average wind speed in January is 8.4 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 Sanya in January is 6.9 hours.