The highest day temperature in December 2025 was 72°F. The lowest night temperature was 38°F. The average values for day and night temperatures during December were 59.5°F и 45.5°F respectivly.

The average sea surface temperature in December 2025 for Rio Gallegos was 52.6°F. The maximum and minimum values were 50.4°F and 54.8°F respectively.

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

Precipitation total in December for Rio Gallegos is 0.3 in. This value is relatively stable throughout the year.

The average wind speed in December is 19.6 mph. It makes December the most windy month of the year for Rio Gallegos.

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 Rio Gallegos in December is 7.7 hours.