Herisau Monthly Rainfall & Precipitation
This page shows both the average monthly rainfall and the number of rainy days in Herisau, St.Gallen Canton, Switzerland. These values are calculated using 30 years of data (1990–2020) to ensure accuracy. Now, let's explore all the details to give you a full picture.
Herisau is known for its substantial rain/snowfall, with annual precipitation reaching 1806 mm (71 in). While the overall climate is wet, there are notable seasonal patterns that create interesting contrasts, as demonstrated in our graph below.
Monthly Precipitation Levels
The average number of days each month with precipitation (> 0.2 mm (0.01 in))
Herisau offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between June (218 mm (8.6 in)) and January (106 mm (4.2 in)) is not too significant, making the climate enjoyable for visitors and residents alike.
June, the wettest month, has a maximum daytime temperature of 21°C (70°F). The city receives 202 hours of sunshine in this period. During the driest month January you can expect a temperature of 4°C (39°F). For more detailed insights into the city's temperatures, visit our Herisau Temperature page.
Annual Rainfall in Switzerland: City Comparison
The map below shows the annual precipitation across Switzerland. You can also select the different months in case you are interested in a specific month.
heavy rainfall
high
moderate
low
almost none
Herisau vs World: Rainfall Compared
Herisau's average annual precipitation is 1806 mm (71 in). Let's compare this to some popular worldwide tourist destinations:
In Barcelona, Spain, the average annual precipitation is 620 mm (24 in), evenly distributed across the year with no extreme wet or dry seasons.
Osaka, Japan, experiences 1507 mm (59 in) of rainfall annually, spread across the year with wetter summers.
In Brisbane, Australia, the annual precipitation is 979 mm (39 in), making it wetter than Sydney.
Singapore, situated near the equator, gets 2581 mm (102 in) of rainfall annually, with no distinct dry season and consistent monthly precipitation.
Precipitation amounts are measured using specific gauges installed at weather stations, collecting both rain and snow and any other type of precipitation. Rainfall is measured directly in millimeters, while that from snow and ice is obtained by melting it. Automated systems often incorporate heaters to make this easier.
Information from these stations is transmitted via Wi-Fi, satellite, GPS, or telephone connections to central monitoring networks. This information is immediately updated and integrated into weather models and forecasts.
Tropical Rainforests: In tropical regions, rainfall is generally abundant year-round. Areas near the equator, like the Amazon rainforest, can receive up to 3000 mm (118 in) of rain annually.
Desert Regions: Deserts such as the Sahara and Arabian deserts typically see less than 250 mm (9.8 in) of rainfall annually. Rainfall tends to be infrequent, but when it does occur, it is often intense.
Temperate Zones: In temperate regions, precipitation tends to be more evenly distributed, though areas closer to the ocean may see more rain in the winter months, and areas further inland experience drier summers.
Polar Regions: Precipitation in polar regions, like Antarctica, is extremely low, often falling as snow. Average annual precipitation in Antarctica is less than 200 mm (7.9 in), with some areas receiving as little as 50 mm (2 in) annually.
- "Ginger" was the longest-lasting Atlantic tropical storm, which spun around the open ocean for 28 days in 1971.
- The world's largest snowflake was recorded in the Guinness Book of Records, at 38 cm (15 inches) wide and 20 cm (7.9 inches) thick. The snowflake fell at Fort Keogh, Montana, USA, on 28 January 1887.
- The greatest snowfall recorded was on Mt. Rainier, Washington State, USA—over 31.5 meters (103 feet) fell during the winter of 1972.
For more detailed information about Herisau's weather, including sunshine hours, humidity levels, and temperature data, visit our Herisau Climate page.
