Climate Chart of St. Gallen, Switzerland

Climate overview

Temperature

The monthly mean temperature is lowest in January, at -0.1 °C, and highest in July, at 18.5 °C. These values describe averages across each month, not daytime maximum temperatures, so they should not be read as a forecast of afternoon conditions or day-to-day variation. Across the calendar months, the unweighted mean of the monthly mean temperatures is 9.1 °C. This summary gives a broad reference for the period, rather than a day-weighted annual average.

Rain

Mean daily rainfall reaches its monthly high in August, at 5.95 mm/day. Visitors planning outdoor activities around that month may want to allow for wet-weather preparation, though this average does not indicate how often rain falls or guarantee rain on a given day. The lowest monthly mean daily rainfall is shared by January / February, at 1.78 mm/day. This is a lower-rainfall reference point, not a promise of dry weather; the unweighted mean across monthly means is 3.65 mm/day.

Snow

The highest monthly mean daily snowfall is recorded in January, at 13.51 mm/day; the unweighted mean of the monthly means is 4.07 mm/day. These are daily average amounts, not monthly totals, and they do not establish the number of snowy days, snow depth, snow cover, or skiing conditions.

Sunshine

Mean daily sunshine duration is highest in June, at 11.57 hours/day, and lowest in December, at 4.48 hours/day. These figures can help with broad outdoor-planning expectations, but sunshine duration is not the same as day length or a guarantee of clear conditions. The unweighted mean of the monthly mean daily sunshine durations is 8.07 hours/day. It summarizes the calendar-month averages and does not describe the sunshine available on any specific visit date.