Zermatt, where it's located

In Zermatt, there is a cold mountain climate, with very cold winters, during which the temperature is normally below freezing, and cool to mild summers.
The village is located at 1,600 meters (5,200 feet) in the Valais, at the foot of the Matterhorn.
The average temperature of the coldest month (January) is of -4.1 °C (25 °F), that of the warmest month (July) is of 12.9 °C (55 °F). Here are the average temperatures.
Zermatt - Average temperatures
Min (°C)-8-8-6-2257741-4-7
Max (°C)014712161918151151
Min (°F)181821283641454539342519
Max (°F)323439455461666459524134

Precipitation amounts to 610 millimeters (24 inches) per year: it is therefore quite scarce, especially if we consider that we are in the mountains. It ranges from 40 mm (1.6 in) in the driest month (September) to 60 mm (2.4 in) in the wettest ones (May, August).
On average, 325 cm (10.5 feet) of snow fall anyway, from November to April (but sometimes, it can even snow in October and May).
Here is the average precipitation.
Zermatt - Average precipitation

On average, there are around 1,670 sunshine hours per year. Here are the average sunshine hours per day.
Zermatt - Sunshine


Best Time

The best time to visit Zermatt is the summer, and in particular, the months of July and August, because they are the mildest, although there are often afternoon thunderstorms. Also, since it can get cold at night, it's better to bring a jacket and a sweater even in this period.

Late winter and early spring (February-March) are recommended for a ski holiday, since the days are longer than in December and January.