Climate Insights for Gaillan-en-Médoc

The climate in Gaillan-en-Médoc is temperate. The average annual temperature is 15°C and approximately 794mm of precipitation falls per year. November is the wettest month, receiving around 90mm of rainfall. Gaillan-en-Médoc is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, June. The coldest months are January, February, December, when temperatures can drop to 5°C.

Temperatures in Gaillan-en-Médoc vary considerably across the year, with a 22°C difference between the coldest and warmest months. The warmest month is August, when average highs reach 27°C and the mean temperature sits around 22°C. January is the coolest month, with minimum temperatures around 5°C and an average of 8°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 4°C shift in average temperatures.

Gaillan-en-Médoc is a relatively dry area, receiving approximately 794mm of precipitation annually, which averages out to around 66mm per month. The wettest month is November, averaging 90mm of rainfall. December and January also tend to see above-average precipitation. The driest month is July, with just 24mm. That's 66mm less than November, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Gaillan-en-Médoc is mildly breezy, with an average annual wind speed of 19km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is March, averaging 21km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in August, with average winds dropping to 17km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 20km/h in winter, 19km/h in spring, 17km/h in summer, 18km/h in autumn.

It is currently spring in Gaillan-en-Médoc, which began on March 20, 2026. Gaillan-en-Médoc 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 August at around 27°C, while the coldest stretch bottoms out in January near 5°C. Summer is next, beginning on June 21, 2026 — 86 days from now.

The best time to visit Gaillan-en-Médoc is during May, June, July, August, September and October, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 58mm per month. By contrast, January can be quite cold with temperatures dropping to 5°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Gaillan-en-Médoc 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. 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.