With a population of around 6,700, Au sits in Saint Gallen, Switzerland. The city operates in the Europe/Zurich time zone.
Recent weather here gives a sense of typical conditions: in 2025, Au recorded a mean annual temperature of 51°F, ranging from 20°F lows in November to 89°F highs in June, with about 66 inches of precipitation across the year.
View historical weather for Au · More cities in Saint Gallen