The weather should be fine!
The hike takes about 5 hours, calculated without brakes.
From the undulating Appenzell region, to the wide valley basin of Appenzell with its richly-adorned «citizens' houses» over two gentle hills with wonderful views of the Säntis, the city of St.Gallen and Bodensee to Schützengarten Stn. (AP). From Schützengarten Stn. we will take a train (1.45h) back to Zürich. Level of the trail is aprox. 700m - 1200m. You have to buy a train ticket to Appenzell. The departure of the Train to Appenzell is at 8:09 am. The train connection back to Zürich is all 30 minutes.