The highest day temperature in December 2025 was 79°F. The lowest night temperature was 55°F. The average values for day and night temperatures during December were 71.6°F и 66.9°F respectivly.

The average sea surface temperature in December 2025 for Beihai was 70.3°F. The maximum and minimum values were 67.0°F and 73.6°F respectively.

Most of the days in December are gloomy but you can also expect sunny days.

Precipitation total in December for Beihai is 1.1 in. It makes december one of the least rainy months of the year.

The average wind speed in December is 12.2 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 Beihai in December is 5.4 hours.