Nantes climate
Nantes (Pays de la Loire, France) has a temperate oceanic climate (Köppen Cfb). The average temperature over the year is 12 °C54 °F, and about 800 mm31 in of precipitation falls in an average year.
Temperature by month
Precipitation by month
Nantes climate table
| Month | High °C°F | Low °C°F | Mean °C°F | Precip. mmin | Frost days |
|---|---|---|---|---|---|
| Jan | 948 | 236 | 642 | 843.3 | 9 |
| Feb | 1049 | 235 | 642 | 652.6 | 10 |
| Mar | 1355 | 438 | 847 | 682.7 | 6 |
| Apr | 1661 | 643 | 1152 | 542.1 | 1 |
| May | 1967 | 948 | 1458 | 652.5 | 0 |
| Jun | 2373 | 1355 | 1864 | 522.1 | 0 |
| Jul | 2577 | 1457 | 1967 | 522.1 | 0 |
| Aug | 2576 | 1457 | 1966 | 522.0 | 0 |
| Sep | 2272 | 1152 | 1762 | 451.8 | 0 |
| Oct | 1864 | 948 | 1356 | 833.3 | 0 |
| Nov | 1355 | 642 | 948 | 883.4 | 2 |
| Dec | 948 | 337 | 643 | 913.6 | 9 |
| Year | 2577 | 235 | 1254 | 80031 | 38 |
“Year” row: highest monthly high, lowest monthly low, annual mean and annual total. Frost days are for the whole grid cell.
| Month | Humid. | Cloud | Solar | Daylight |
|---|---|---|---|---|
| Jan | 92% | 74% | 1.1 | 8:53 |
| Feb | 88% | 69% | 2.0 | 10:12 |
| Mar | 84% | 66% | 3.2 | 11:45 |
| Apr | 80% | 64% | 4.6 | 13:33 |
| May | 80% | 66% | 5.4 | 15:04 |
| Jun | 78% | 63% | 6.0 | 15:54 |
| Jul | 76% | 58% | 5.8 | 15:33 |
| Aug | 76% | 59% | 5.0 | 14:13 |
| Sep | 77% | 55% | 4.0 | 12:29 |
| Oct | 85% | 68% | 2.3 | 10:46 |
| Nov | 90% | 71% | 1.4 | 9:15 |
| Dec | 93% | 71% | 1.0 | 8:30 |
Humid. = average relative humidity at 2 m; cloud = average cloud amount; solar = average daily solar energy reaching the ground in kWh/m² (all-sky); daylight in hours:minutes, calculated for the 15th of each month.
What the climate of Nantes is like
The warmest month is July, with an average high of 25 °C77 °F and a low of 14 °C57 °F. The coldest is January, when highs average 9 °C48 °F and lows 2 °C36 °F. There is a clear seasonal cycle, with 13.8 °C24.9 °F between the average temperature of the warmest and the coolest month.
Annual precipitation is moderate at about 800 mm31 in. The wettest three-month stretch is November–January, which brings 33% of the annual total. The wettest month is December (91 mm3.6 in), the driest is September (45 mm1.8 in).
Relative humidity ranges from 76% in July to 93% in December. The clearest skies (lowest average cloud amount, 55%) are typical of September. Average wind speed near the ground ranges from 9 km/h (6 mph) in August to 12 km/h (7 mph) in February. Daylight lasts from about 8.5 hours in December to 15.9 hours in June.
Best time to visit Nantes
Based on these averages, the most comfortable months for sightseeing and outdoor activities are May–September: average highs of 19 °C67 °F to 25 °C77 °F with 45 mm1.8 in to 65 mm2.5 in of precipitation per month.
The most challenging month is December, which is cold, with average highs of 9 °C48 °F.
Comfort score: months are ranked by how close they come to an average high of 21–28 °C (70–82 °F), lows above 5 °C (41 °F), little precipitation and moderate humidity. The best-ranked months of each place are recommended, even where none meets all of these. These are general rules of thumb applied to long-term averages.
What to pack for Nantes
- Winter (December–February) — highs 948 to 10 °C49 °F, lows 235 to 3 °C37 °F, about 80 mm3.2 in of precipitation a month. Pack a warm coat, layers and closed shoes.
- Spring (March–May) — highs 1355 to 19 °C67 °F, lows 438 to 9 °C48 °F, about 62 mm2.5 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
- Summer (June–August) — highs 2373 to 25 °C77 °F, lows 1355 to 14 °C57 °F, about 52 mm2.0 in of precipitation a month. Pack light summer clothes such as T-shirts, shorts or light dresses and an extra layer for the cooler mornings and evenings.
- Autumn (September–November) — highs 1355 to 22 °C72 °F, lows 642 to 11 °C52 °F, about 72 mm2.8 in of precipitation a month. Pack long sleeves, a sweater and a medium jacket.
How Nantes compares
Compared with Paris, about 342 km to the northeast, Nantes is on average 0.9 °C1.6 °F warmer and receives 21% more precipitation (800 mm31 in vs 662 mm26 in). The difference is largest in January (2.3 °C4.1 °F warmer).
Of the 36 places in France covered by World Climates, Nantes is the 11th warmest by annual mean temperature and the 8th wettest by annual precipitation. See all of them on the France climate page.
Places in other countries with the most similar temperature and rainfall pattern: Pamplona (Spain, Cfb), Gasteiz / Vitoria (Spain, Cfb) and Worthing (United Kingdom, Cfb).
Nearby places
- Angers 81 km · 12 °C53 °F · 714 mm28 in
- Rennes 100 km · 12 °C53 °F · 708 mm28 in
- Le Mans 158 km · 12 °C53 °F · 707 mm28 in
- Tours 171 km · 12 °C53 °F · 698 mm27 in
- Jersey (St Helier) 223 km · 12 °C54 °F · 772 mm30 in
- Caen 236 km · 12 °C53 °F · 745 mm29 in
- Brest 255 km · 12 °C54 °F · 897 mm35 in
- Guernsey (St Peter Port) 260 km · 12 °C54 °F · 847 mm33 in
Frequently asked questions
What is the warmest month in Nantes?
July is the warmest month in Nantes, with an average high of 25 °C (77 °F) and an average low of 14 °C (57 °F).
What is the coldest month in Nantes?
January is the coldest month, with an average high of 9 °C (48 °F) and an average low of 2 °C (36 °F).
When does it rain the most in Nantes?
December is the wettest month with about 91 mm (3.6 in) of precipitation; September is the driest with about 45 mm (1.8 in).
What is the best time to visit Nantes?
Judging by long-term averages, the most comfortable months are May–September.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 70 m, while Nantes lies at about 19 m. Temperatures on this page were therefore adjusted by +0.3 °C0.6 °F using the standard lapse rate of 6.5 °C per 1,000 m.