Herisau Weather & Climate: Best Time to Visit

Visitors to Herisau can expect significant temperature changes throughout the year. Average maximum daytime temperatures range from a comfortable 23°C (73°F) in July, the warmest time of the year, to a chilly 4°C (39°F) during cooler months like January.

At night, you can expect temperatures ranging from 13°C (55°F) in July to around -4°C (25°F) during January.

Check out our detailed temperature page for more information.

Temperature ranges by month

Herisau is known for its substantial rain/snowfall, with annual precipitation reaching 1806 mm (71 in). While rainfall varies throughout the year, each season offers its own charm. June brings wetter days averaging 218 mm (8.6 in) of precipitation, spread over 18 rainy days.

In contrast, the driest month January experiences a drier climate, with about 106 mm (4.2 in) of snow/rainfall spread across 15 snowy/rainy days. For more details, please visit our Herisau Precipitation page.

The mean monthly precipitation over the year, including rain, hail, and snow

The average number of days each month with precipitation

Seasonal changes in sunshine hours are quite dramatic in Herisau. While July receives considerable daily sunshine with up to 7.6 hours, December marks the darkest time of the year, where sunshine is scarce with only 1.6 hours of sunlight per day.

Visit our detailed sunshine hours page for more information.

Monthly hours of sunshine

Daily hours of sunshine

Daily percentage of sunshine

The relative humidity is high throughout the year in Herisau.

The city experiences its highest humidity in November, reaching 82%. In April, the humidity drops to its lowest level at 68%. What does this mean? Read our detailed page on humidity levels for further details.

Relative humidity over the year