Climate Insights for Passy

The climate in Passy is cool. The average annual temperature is 3°C and approximately 1755mm of precipitation falls per year. Passy receives a notable amount of rainfall throughout the year, including during its driest month. Passy 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 -11°C. Passy experiences heavy snowfall, typically from January through December.

Temperatures in Passy vary considerably across the year, with a 30°C difference between the coldest and warmest months. July is the warmest month, though highs remain moderate at 19°C with a mean of 14°C. The coldest month is January, when overnight lows fall to -11°C and the daily average is -8°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 6°C shift in average temperatures.

Passy is a fairly wet location, receiving approximately 1755mm of precipitation annually, which averages out to around 146mm per month. The wettest month is December, averaging 215mm of rainfall. January and May also tend to see above-average precipitation. The driest month is September, with just 92mm. That's 124mm less than December, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Passy receives heavy snowfall, accumulating around 939cm annually from January through December. The snowiest month is December, with approximately 197cm. Winter travel should account for significant snow cover.

Passy is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 1km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 0km/h between the calmest and windiest months.

It is currently summer in Passy, which began on June 21, 2026. Passy 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 19°C, while the coldest stretch bottoms out in January near -11°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.

The table below shows monthly climate averages for Passy 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.