Climate averages 1991–2020
Sankt Gallen weather
in May.
A mild, wet month: the 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Sankt Gallen: daytime highs average 16.1°C and nights cool to about 7.0°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 155 mm of rain on roughly 17 days, which makes May a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 15 h 05 min on an average May day.
The nearest other city in this atlas is Konstanz (30 km away). In May its highs average 18.0°C, 1.8°C warmer than Sankt Gallen, with 119 mm of rain.
Among the 8 cities listed in Switzerland, Sankt Gallen ranks 8th of 8 for the warmest May highs and 7th of 8 for the driest May (rainfall, lowest first). The mean May high of those 8 cities is 17.5°C; Sankt Gallen is 1.3°C cooler than that mean.
From May to June, average highs rise by 3.3°C to 19.4°C, and monthly rainfall rises from 155 mm to 172 mm.
The annual picture
May 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, selected | 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 | 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
May in nearby cities
- Konstanz in MayGermany · 30 kmHigh 18.0°C · Low 11.2°C · 119 mm rain
- Vaduz in MayLiechtenstein · 33 kmHigh 18.0°C · Low 8.2°C · 188 mm rain
- Winterthur in MaySwitzerland · 50 kmHigh 17.6°C · Low 8.5°C · 119 mm rain
- Zürich in MaySwitzerland · 62 kmHigh 17.9°C · Low 8.6°C · 144 mm rain
- Luzern in MaySwitzerland · 91 kmHigh 17.9°C · Low 8.1°C · 188 mm rain
- Villingen-Schwenningen in MayGermany · 97 kmHigh 15.9°C · Low 7.1°C · 133 mm rain
- Ulm in MayGermany · 118 kmHigh 17.6°C · Low 8.3°C · 95 mm rain
- Reutlingen in MayGermany · 119 kmHigh 18.0°C · Low 8.5°C · 95 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.