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Nantes shines from May to October: Machines de l'île, Château des ducs de Bretagne, Voyage à Nantes (summer contemporary art trail), gastronomy. May-June and September-October ideal.
| Month | Air (°C) | Wind (kts) | Rain (mm) | Verdict |
|---|---|---|---|---|
| January | 6.7° | 8.1· 4% | 85 | Avoid |
| February | 7.2° | 8.7· 6% | 69 | Avoid |
| March | 9.1° | 8.3· 5% | 68 | Fair |
| April | 11.6° | 7.0· 0% | 49 | Good |
| May | 14.8° | 7.3· 0% | 57 | Best |
| June | 18.6° | 6.5· 0% | 64 | Best |
| July | 20.3° | 6.9· 0% | 39 | Best |
| August | 19.9° | 6.4· 0% | 50 | Best |
| September | 17.9° | 6.5· 1% | 48 | Best |
| October | 14.1° | 7.2· 1% | 94 | Good |
| November | 10.0° | 7.8· 1% | 92 | Avoid |
| December | 7.9° | 8.3· 3% | 95 | Avoid |
Spring at Nantes is a privileged season. May-June offer mild conditions, town awakening, first Voyage à Nantes installations (contemporary art trail). Ideal to discover Machines de l'île, Château des ducs de Bretagne, Mémorial de l'abolition de l'esclavage.
Summer at Nantes is the Voyage à Nantes peak — summer artistic trail transforming the city into an open-air museum. La Folle Journée (classical music festival), Les Allumées, summer festivals make Nantes a summer cultural capital. Significant crowds but unique atmosphere.
Autumn anoints Nantes as an authentic cultural destination. September offers perfect conditions, thinning crowds after back-to-school, autumnal gastronomy (Challans duck, Guérande salt).
Winter at Nantes is intimate. Christmas markets (one of France's most beautiful), Folle Journée late January (legendary classical music festival), starred restaurants.
Winter. 6°C, rain, short days. Museums open, intimate atmosphere.
Same as January.
Winter exit. 11°C, first visitors.
Resumption. 13°C, gardens awakening, good visit conditions.
Excellent. 17°C, soft light, limited crowds.
Spring peak. 21°C, long days, perfect conditions.
Summer (24°C). Tourist attendance, festivals.
Tourist peak. Same conditions as July.
The crown jewel. 21°C, thinning crowds, perfect conditions.
Excellent. 16°C, autumnal colours, intimate atmosphere.
Season's end. 10°C, first frosts.
Winter. 6°C, Christmas markets.
Data: Open-Meteo (ERA5), period 2014-2023. Updated May 5, 2026.