Alt Sankt Johann Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Alt Sankt Johann.
Climate overview of Alt Sankt Johann
The climate in Alt Sankt Johann, St.Gallen Canton, Switzerland, is marked by large temperature swings across the seasons, ranging from 21°C (70°F) in July to 2°C (36°F) in January.
The city receives considerable rain/snowfall, with around 2122 mm (84 in) annually. June is the wettest month. It has a distinct rainy season from May to September. August is the sunniest month, averaging 5.7 hours of sunshine per day.
Alt Sankt Johann Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alt Sankt Johann — and find the best time to visit.
Monthly Temperature in Alt Sankt Johann
In Alt Sankt Johann, temperatures differ significantly between summer and winter months. Typically, average maximum daytime temperatures range from a pleasant 21°C (70°F) in July to a chilly 2°C (36°F) in the coolest month, January.
Nights vary from 11°C (52°F) in July to around -6°C (21°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Alt Sankt Johann
Alt Sankt Johann experiences significant rain/snowfall throughout the year, averaging 2122 mm (84 in) of precipitation annually. Alt Sankt Johann offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month June (263 mm (10 in)) and the driest month January (124 mm (4.9 in)) is not too significant. For more details, please visit our Alt Sankt Johann Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Alt Sankt Johann
Alt Sankt Johann offers a pleasant mix of sunny and slightly overcast days. The difference in sunshine hours between August (5.7 hours daily) and December (3.7 hours daily) provides a bit of variety for visitors and residents.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Humidity in Alt Sankt Johann by Month
The relative humidity is high throughout the year in Alt Sankt Johann.
The city experiences its highest humidity in June, reaching 85%. In January, the humidity drops to its lowest level at 66%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Wind Speed in Alt Sankt Johann
The average wind speed over the year ranges from 5 m/s (10 knots) to 8 m/s (16 knots). It is lower in April, May and June and higher in January. What does this mean?
The mean monthly wind speed over the year (meters per second)
Best Time to Visit Alt Sankt Johann
Be prepared for heavier rainfall during May, June, July, August and September, the wettest period of the year. Planning your next adventure but unsure where to go? Our climate tool suggests perfect locations tailored to your preferred weather conditions. Discover your ideal travel destination with our weather planner.
Frequently asked questions about the climate in Alt Sankt Johann
What is the best time to visit Alt Sankt Johann?
July typically offers the most optimal weather in Alt Sankt Johann. In contrast, January, February, March, April, May, June, August, September, October, November and December tend to have less optimal conditions. Alt Sankt Johann has a distinct rainy season from May to September.
What temperatures can I expect in Alt Sankt Johann?
Daytime highs range from 2°C (36°F) in January to 21°C (70°F) in July. Nighttime lows range from -6°C (21°F) to 11°C (52°F). Temperatures vary considerably through the year.
How much rain does Alt Sankt Johann get?
Annual rainfall is around 2122 mm (84 in). June is the wettest month with 263 mm (10 in), while January is the driest with 124 mm (4.9 in).
How sunny is Alt Sankt Johann?
Alt Sankt Johann receives around 1,786 hours of sunshine per year. August is the sunniest month with 170 hours, while December is the cloudiest with just 112 hours.
Alt Sankt Johann 3-Day Forecast
Alt Sankt Johann 3-Day Forecast
Alt Sankt Johann on the map
Alt Sankt Johann is highlighted — select any city to see its climate.
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