Climate Overview
The climate in St. Moritz is cold. The average annual temperature is 1°C and approximately 1497mm of precipitation falls per year. St. Moritz receives a notable amount of rainfall throughout the year, including during its driest month. St. Moritz is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, August, June. The coldest months are January, December, February, when temperatures can drop to -14°C. St. Moritz experiences heavy snowfall, typically from January through December.
Temperature
Temperatures in St. Moritz vary considerably across the year, with a 29°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 15°C with a mean of 11°C. The coldest month is January, when overnight lows fall to -14°C and the daily average is -10°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows. The sharpest temperature change occurs between October and November, with a 7°C shift in average temperatures.
Precipitation
St. Moritz is a fairly wet location, receiving approximately 1497mm of precipitation annually, which averages out to around 125mm per month. The wettest month is August, averaging 176mm of rainfall. June and July also tend to see above-average precipitation. The driest month is February, with just 69mm. That's 107mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall. St. Moritz receives heavy snowfall, accumulating around 713cm annually from January through December. The snowiest month is November, with approximately 110cm. Winter travel should account for significant snow cover.
Wind
St. Moritz is relatively calm, with an average annual wind speed of 6km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
87 days until Winter
It is currently autumn in St. Moritz, which began on September 23, 2026. St. Moritz is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in July at around 15°C, while the coldest stretch bottoms out in January near -14°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from -9 to 7°C. Rainfall is heavy, totalling around 359mm across the season with a monthly average of 120mm. Winds are generally light, averaging 6km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 5 to 15°C. Rainfall is heavy, totalling around 516mm across the season with a monthly average of 172mm. Winds are generally light, averaging 5km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from -8 to 11°C. Rainfall is heavy, totalling around 384mm across the season with a monthly average of 128mm. Expect around 199cm of snow accumulation during this period. Winds are generally light, averaging 5km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from -14 to -2°C. Precipitation is moderate at around 239mm for the season, averaging 80mm per month. Expect around 238cm of snow accumulation during this period. Winds are generally light, averaging 6km/h. Heavy layering and insulated outerwear are essential. Exposed skin should be minimised outdoors.
Monthly Climate Data
The table below shows monthly climate averages for St. Moritz based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
