Weather in St Gallen: December
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Average day temperature: | 40.0°F |
| Average night temperature: | 33.3°F | |
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Sea water temperature: | 45.6°F |
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Number of sunny days: | 11 days |
| Day length: | 8.4 - 8.7 hours | |
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Number of days with precipitation: | 6 days |
| Precipitation totals: | 3.8 in. | |
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forecast
| St Gallen |
temperature
| St Gallen |
Air temperature in December, °F
The highest day temperature during December of 2025 was 50°F. At the same time the lowest night temperature was 27°F. Daily and nightly averages during December were 42.5°F and 35.6°F.
Sea water temperature in St Gallen in December, °F
The average sea water temperature in December of 2025 was 45.8°F. The highest and lowest sea temperatures during the month were 48.0°F and 44.4°F.
Mostly all days in December are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in December, in.
Precipitation total value in St Gallen in December is 4.2 in. Other months of the year show relatively similar values.
The average wind speed value in December is 4.6 mph
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 4.2.
Best time for vacation in St Gallen
St Gallen on a weather map
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