Question 1

When is the best weather in St. Gallen?

Accepted Answer

St. Gallen enjoys its best weather conditions during late summer, with August standing out as the optimal month for pleasant temperatures, abundant sunshine, and relatively low rainfall.

In 2024, August delivered the most favorable conditions in St. Gallen with an average temperature of 19.6°C (67.3°F) and an impressive 334.1 hours of sunshine—the highest of any month. Daily highs reached up to 29.8°C (85.6°F), while precipitation remained moderate at 123.1mm (4.8 inches), significantly lower than the rainy early summer months.

July also offers excellent weather in St. Gallen, with average temperatures of 18.8°C (65.8°F) and 280.2 hours of sunshine. However, July 2024 saw considerably more rainfall at 276.3mm compared to August. The summer months from June through August averaged 18.3°C (65.0°F) with a combined 797.2 hours of sunshine.

For visitors planning outdoor activities, August provides the ideal combination of warm temperatures and stable weather conditions. The city's elevation of 690 meters keeps summer heat comfortable, rarely becoming oppressively hot. If you prefer fewer crowds but still want pleasant conditions, late September offers mild temperatures around 13.3°C (55.9°F) with good sunshine, making it suitable for exploring St. Gallen's historic old town and surrounding alpine scenery.

Question 2

How cold does St. Gallen get in December?

Accepted Answer

St. Gallen experiences moderately cold December temperatures, with average daily lows reaching -2.7°C (27.1°F) and occasional dips below -7°C (18°F) during the coldest periods.

In December 2024, St. Gallen recorded an average daily temperature of 0.6°C (33.1°F), with daytime highs typically reaching 4.2°C (39.6°F). The coldest temperature of the month was -7.6°C (18.3°F), recorded on December 26-27, while milder days saw temperatures climb to 10.9°C (51.6°F) on December 18. Out of 31 days, 22 experienced sub-zero overnight lows, making frost a regular occurrence.

For visitors planning a December trip to St. Gallen, warm layers are essential. The city sits at 690 meters elevation, which contributes to these alpine-influenced temperatures. December 2024 also brought 122.5mm (4.8 inches) of precipitation, so waterproof outerwear is recommended alongside winter clothing.

Question 3

How much rainfall does St. Gallen get per year?

Accepted Answer

St. Gallen receives approximately 2,339 mm (92 inches) of rainfall per year, based on 2024 weather data. This makes it one of the wetter cities in Switzerland due to its location at the foot of the Alps.

In 2024, St. Gallen saw significant variation in monthly precipitation. May was the wettest month with 339.7 mm (13.4 inches), followed closely by June with 323.6 mm (12.7 inches). November was the driest month, recording just 94.6 mm (3.7 inches) of precipitation.

The summer months from June to August brought a combined 723 mm (28.5 inches) of rain to St. Gallen in 2024, with frequent afternoon thunderstorms common during this period. The monthly average across 2024 was approximately 195 mm (7.7 inches), though precipitation varied considerably from month to month.

Visitors planning trips to St. Gallen should expect rain throughout the year and pack accordingly. Late autumn, particularly November, tends to offer drier conditions, while late spring and early summer see the heaviest rainfall.

Question 4

Which months have the most sunshine in St. Gallen?

Accepted Answer

St. Gallen enjoys the most sunshine during late summer, with August and July being the sunniest months of the year. In 2024, the city recorded a total of 2,067 sunshine hours across the entire year.

August 2024 was the standout month in St. Gallen, with an impressive 334 hours of sunshine and average temperatures of 19.6°C (67°F). July followed closely with 280 hours of sunshine at 18.8°C (66°F). Together, these two summer months alone accounted for nearly 30% of the annual sunshine total.

The summer period from June through August provided St. Gallen with approximately 797 hours of sunshine, averaging about 266 hours per month. In contrast, the winter months of December through February received just 317 hours combined, averaging around 106 hours monthly. February 2024 was the least sunny month with only 99.5 hours of sunshine.

For visitors planning outdoor activities in St. Gallen, August offers the ideal combination of maximum sunshine and pleasant temperatures. The extended daylight hours during late summer make it perfect for exploring the historic Old Town, hiking in the surrounding hills, or enjoying the city's famous outdoor cafés. Even September remains quite sunny with 188 hours, making early autumn another excellent time to visit this Swiss city.

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Saint Gallen

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FAQ

When is the best weather in St. Gallen?

How cold does St. Gallen get in December?

How much rainfall does St. Gallen get per year?

Which months have the most sunshine in St. Gallen?