The highest day temperature in December 2023 was 50°F. The lowest night temperature was 8°F. The average values for day and night temperatures during December were 39.9°F и 34.3°F respectivly.

The average sea surface temperature in December 2023 for St Gallen was 45.1°F. The maximum and minimum values were 42.4°F and 47.6°F respectively.

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

Precipitation total in December for St Gallen is 4.2 in.

The average wind speed in December is 4.8 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 St Gallen in December is 4.5 hours.