Climate Insights for Nantes

The climate in Nantes is temperate. The average annual temperature is 13°C and approximately 752mm of precipitation falls per year. December is the wettest month, receiving around 89mm of rainfall. Nantes 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 February, January, December, when temperatures can drop to 4°C.

Temperatures in Nantes vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is July, when average highs reach 25°C and the mean temperature sits around 20°C. February is the coolest month, with minimum temperatures around 4°C and an average of 7°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.

Nantes is a relatively dry area, receiving approximately 752mm of precipitation annually, which averages out to around 63mm per month. The wettest month is December, averaging 89mm of rainfall. November and March also tend to see above-average precipitation. The driest month is July, with just 28mm. That's 61mm less than December, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Nantes is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.

It is currently spring in Nantes, which began on March 20, 2026. Nantes 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 25°C, while the coldest stretch bottoms out in February near 4°C. Summer is next, beginning on June 21, 2026 — 4 days from now.

The best time to visit Nantes is during May, June, July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 48mm per month. By contrast, February can be quite cold with temperatures dropping to 4°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 Nantes 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.