Best Time to Visit Herisau, Appenzell Ausserrhoden, Switzerland
Month-by-month climate guide for planning a trip to Herisau.
Herisau does not have a month that clearly fits our sunny profiles. Its practical travel window centres on its warmest (July, 16.9°C / 62.4°F) and driest (January, 63 mm / 2.5 in) months. The drier stretch runs through October–April; the wetter half falls in May–September. At the city itself, monthly average temperatures range from -0.4°C / 31.3°F in January to 16.9°C / 62.4°F in July, with rainfall from 63 mm / 2.5 in (January) to 155 mm / 6.1 in (July). These are point-value climate normals sampled at Herisau, Appenzell Ausserrhoden, Switzerland's coordinates — usually more actionable for travellers than the country-wide average. Herisau's climate is broadly seasonal. The full month-by-month table below lets you match your travel window against our five weather profiles.
Recommended months
| Month | Temp | Rain | Feels like |
|---|---|---|---|
| October | 8.6°C47.5°F | 84 mm3.3″ | — |
| September | 13.1°C55.6°F | 112 mm4.4″ | — |
| March | 3.9°C39°F | 77 mm3″ | — |
No month at Herisau matches our sunny profiles. The three above are the driest-and-warmest fallback.
Frequently asked questions
When is the best time to visit Herisau?
Herisau doesn't have a month that clearly matches our sunny profiles. The practical travel window centres on January (driest, ~63 mm / 2.5 in) and July (warmest, 16.9°C / 62.4°F). Because these are point values at the city, they can differ substantially from Switzerland's national average.
When is the rainy season in Herisau?
The rainy season at Herisau, Appenzell Ausserrhoden runs through May–September, when monthly rainfall exceeds the annual median of about 102 mm / 4 in. The wettest single month is July (155 mm / 6.1 in).
What is the driest month in Herisau?
The driest month in Herisau is January, averaging about 63 mm / 2.5 in of rainfall. Temperature that month averages -0.4°C / 31.3°F.
What months should I avoid visiting Herisau?
The least comfortable months for travel to Herisau — based on point-value climate at the city — are January, February, June, July, August, November, December. These are the wettest or coolest months at this location. Rainfall peaks at 155 mm / 6.1 in in July, and the coldest month averages -0.4°C / 31.3°F.
Is Herisau climate different from Switzerland overall?
Yes, usually. Our Herisau figures are point-value climate normals sampled at the city itself, while our Switzerland figures are area-weighted averages across the whole country. The two can diverge substantially in geographically diverse or elevation-varied countries. The month-by-month table below reflects Herisau specifically — usually the more actionable data for a traveller planning to spend time in the city.