Nantes, France Climate & Monthly Averages
Nantes has an oceanic climate. July is the hottest month, averaging 77° by day; January is the coldest at 49°.
Sunshine is a defining feature of Nantes's climate
Nantes runs on a dry-summer rhythm: the warmest months are also the driest. July averages 1.6 inches (41 mm) while the wet season peaks in October at 4.0 inches (102 mm). Highs range from 49°F (9°C) to 77°F (25°C).
How sun, temperature and rain fit together
At its warmest, in July, Nantes runs to 77°F (25°C) in the afternoon and back to 60°F (16°C) by dawn. January bottoms out at 49°F (9°C) in daylight, 39°F (4°C) after dark. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 104°F (40°C) and the lowest daily minimum 21°F (-6°C).
Five of the twelve months pair mild highs with fewer than twelve wet days; the longest unbroken run is May through September.
Precipitation concentrates in October - 4.0 inches (102 mm) on 12 days - and thins out by July. Sunshine averages 8.5 hours a day over the year, peaking in July at 12.2 hours. Snowfall is rare but not unheard of.
More climate facts for Nantes
- Hottest month: July - highs near 77°F (25°C)
- Coldest month: January - highs near 49°F (9°C)
- Decade extremes (2015-2024): 104°F (40°C) high · 21°F (-6°C) low
- Wettest month: October (12 rainy days) · Sunniest: July (12.2 h sun/day)
- Climate type: oceanic
- Annual swing: 14°C between the average warmest and coolest month · day to night: 7°C
- Average humidity: 78%
The most comfortable sunny-weather window
Best time to visit Nantes
The best time to visit Nantes is generally April to September, when the dry season is running but the afternoons are still bearable. Daytime temperatures in that window sit near 71°F (22°C), with rain on about 9 days a month. For the same question asked the other way round, see where else is warm in April.
What to pack
Pack for Nantes with a warm jacket and layers for the cooler season and a compact umbrella or rain shell. Even in July, lows of 60°F (16°C) make an extra layer worth the space.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 49° | 39° | 13 | 3.3 in | 4.6 h/day | 8.9 h | 42% | 86% |
| February | 51° | 40° | 11 | 2.7 in | 6.1 h/day | 10.2 h | 40% | 82% |
| March | 55° | 42° | 13 | 3.0 in | 7.9 h/day | 11.8 h | 41% | 79% |
| April | 61° | 46° | 9 | 2.1 in | 9.9 h/day | 13.5 h | 29% | 73% |
| May | 66° | 51° | 12 | 2.5 in | 10.9 h/day | 15.1 h | 38% | 73% |
| June | 73° | 58° | 10 | 2.7 in | 11.7 h/day | 15.9 h | 35% | 72% |
| July | 77° | 60° | 8 | 1.6 in | 12.2 h/day | 15.6 h | 25% | 69% |
| August | 77° | 60° | 8 | 1.7 in | 11.4 h/day | 14.2 h | 26% | 70% |
| September | 72° | 56° | 10 | 2.2 in | 9.7 h/day | 12.5 h | 32% | 73% |
| October | 64° | 51° | 12 | 4.0 in | 7.2 h/day | 10.8 h | 38% | 81% |
| November | 55° | 45° | 11 | 3.5 in | 5.8 h/day | 9.2 h | 38% | 85% |
| December | 51° | 42° | 13 | 3.7 in | 4.5 h/day | 8.5 h | 41% | 87% |
Nantes month by month
Each card shows the average high and low. The bar places that month between Nantes's coldest night and warmest afternoon.
January
- Rain
- 13 days
- Sunshine
- 4.6 h
- Daylight
- 8.9 h
February
- Rain
- 11 days
- Sunshine
- 6.1 h
- Daylight
- 10.2 h
March
- Rain
- 13 days
- Sunshine
- 7.9 h
- Daylight
- 11.8 h
April
- Rain
- 9 days
- Sunshine
- 9.9 h
- Daylight
- 13.5 h
May
- Rain
- 12 days
- Sunshine
- 10.9 h
- Daylight
- 15.1 h
June
- Rain
- 10 days
- Sunshine
- 11.7 h
- Daylight
- 15.9 h
July
- Rain
- 8 days
- Sunshine
- 12.2 h
- Daylight
- 15.6 h
August
- Rain
- 8 days
- Sunshine
- 11.4 h
- Daylight
- 14.2 h
September
- Rain
- 10 days
- Sunshine
- 9.7 h
- Daylight
- 12.5 h
October
- Rain
- 12 days
- Sunshine
- 7.2 h
- Daylight
- 10.8 h
November
- Rain
- 11 days
- Sunshine
- 5.8 h
- Daylight
- 9.2 h
December
- Rain
- 13 days
- Sunshine
- 4.5 h
- Daylight
- 8.5 h
Looking for warmer alternatives? Browse warm places by month, or compare Nantes's coolest part of the year: January, December, February.
Seasonal weather under Nantes's sunnier skies
Spring (March through May)
Through spring, Nantes is mild: 61°F (16°C) by day, 46°F (8°C) after dark, and rain falls on around 33 of the 90 days.
Summer (June through August)
Summer brings comfortable warmth here - highs near 76°F (24°C), nights near 60°F (15°C), and expect showers on roughly 26 days across the season. Daylight is generous - around 11.8 hours of sun a day.
Fall (September through November)
Fall stays on the cool side of mild here - highs near 64°F (18°C), nights near 51°F (10°C), and rain falls on around 33 of the 90 days.
Winter (December through February)
Winter in Nantes stays firmly cold, with daytime highs averaging 50°F (10°C) and nights around 40°F (5°C); rain falls on around 37 of the 90 days.
How unusual is Nantes?
- Nantes sits close to the middle of our dataset on most measures: 56°F (13°C) as an annual average, 33.1 inches (840 mm) of precipitation and 8.5 hours of sun a day.
These comparisons use the same ten-year window for every city in the dataset.
Nantes temperature extremes in the 2015–2024 dataset
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need another precipitation unit? Use the rainfall converter.