Climate Insights for Guillestre

The climate in Guillestre is cool. The average annual temperature is 2°C and approximately 1144mm of precipitation falls per year. Guillestre receives a notable amount of rainfall throughout the year, including during its driest month. Guillestre 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. Guillestre experiences heavy snowfall, typically from January through December.

Temperatures in Guillestre 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 13°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 7°C shift in average temperatures.

Guillestre is a moderately rainy area, receiving approximately 1144mm of precipitation annually, which averages out to around 95mm per month. The wettest month is May, averaging 123mm of rainfall. December and November also tend to see above-average precipitation. The driest month is July, with just 58mm. That's 65mm less than May, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Guillestre receives heavy snowfall, accumulating around 462cm annually from January through December. The snowiest month is December, with approximately 84cm. Winter travel should account for significant snow cover.

Guillestre is relatively calm, with an average annual wind speed of 8km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 10km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 7km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months.

It is currently spring in Guillestre, which began on March 20, 2026. Guillestre 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. Summer is next, beginning on June 21, 2026 — 86 days from now.

The table below shows monthly climate averages for Guillestre 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.