Climate averages 1991–2020
Sankt Gallen weather
in December.
A cold, wet month: the 11th warmest and the 7th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
December is a cold month in Sankt Gallen: daytime highs average 3.4°C and nights cool to about -3.5°C. By daytime temperature it is the 11th warmest of the 12 months.
Expect about 105 mm of rain on roughly 14 days, which makes December a wet month (the 7th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 8 h 32 min on an average December day.
The nearest other city in this atlas is Konstanz (30 km away). In December its highs average 4.3°C, 0.9°C warmer than Sankt Gallen, with 85 mm of rain.
Among the 8 cities listed in Switzerland, Sankt Gallen ranks 8th of 8 for the warmest December highs and 4th of 8 for the driest December (rainfall, lowest first). The mean December high of those 8 cities is 5.1°C; Sankt Gallen is 1.7°C cooler than that mean.
From December to January, average highs fall by 0.6°C to 2.8°C, and monthly rainfall falls from 105 mm to 88 mm.
The annual picture
December in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Sankt Gallen climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 2.8°C-4.8°C | -4.8°C | 88 | 12.7 | 8.99 h |
| February | 3.9°C-4.7°C | -4.7°C | 80 | 11.8 | 10.210 h |
| March | 7.8°C-1.4°C | -1.4°C | 100 | 14.8 | 11.912 h |
| April | 12.0°C2.1°C | 2.1°C | 102 | 14.5 | 13.614 h |
| May | 16.1°C7.0°C | 7.0°C | 155 | 17.2 | 15.115 h |
| June | 19.4°C10.7°C | 10.7°C | 172 | 17.4 | 15.916 h |
| July | 21.3°C12.6°C | 12.6°C | 174 | 17.5 | 15.516 h |
| August | 21.2°C12.7°C | 12.7°C | 175 | 16.8 | 14.314 h |
| September | 17.2°C9.2°C | 9.2°C | 127 | 13.7 | 12.613 h |
| October | 13.4°C5.6°C | 5.6°C | 103 | 12.9 | 10.911 h |
| November | 7.5°C0.4°C | 0.4°C | 103 | 12.7 | 9.49 h |
| December, selected | 3.4°C-3.5°C | -3.5°C | 105 | 14.1 | 8.59 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
December in nearby cities
- Konstanz in DecemberGermany · 30 kmHigh 4.3°C · Low 0.4°C · 85 mm rain
- Vaduz in DecemberLiechtenstein · 33 kmHigh 5.0°C · Low -2.7°C · 124 mm rain
- Winterthur in DecemberSwitzerland · 50 kmHigh 4.9°C · Low -0.9°C · 93 mm rain
- Zürich in DecemberSwitzerland · 62 kmHigh 5.2°C · Low -0.4°C · 106 mm rain
- Luzern in DecemberSwitzerland · 91 kmHigh 5.3°C · Low 0.0°C · 131 mm rain
- Villingen-Schwenningen in DecemberGermany · 97 kmHigh 3.0°C · Low -2.7°C · 100 mm rain
- Ulm in DecemberGermany · 118 kmHigh 3.9°C · Low -1.5°C · 68 mm rain
- Reutlingen in DecemberGermany · 119 kmHigh 4.9°C · Low -0.7°C · 75 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Sankt Gallen) is explained once on the Sankt Gallen year overview and on the Sources, method and limits page.