Carnac Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Carnac.
Climate overview of Carnac
Carnac, Brittany, France, experiences moderate temperature changes through the seasons. August is the warmest month with daytime highs of 22°C (72°F), while January is the coolest at 11°C (52°F).
Annual rainfall is moderate at around 844 mm (33 in), with December being the wettest month. The city also has pleasant summers and cold winters.
Carnac Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Carnac - and find the best time to visit.
Monthly Temperature in Carnac
The weather in Carnac changes moderately throughout the year, offering enough variation to appreciate each season. Average daytime temperatures reach a pleasant 22°C (72°F) in August. In January, the coolest month of the year, temperatures drop to a chilly 11°C (52°F).
At night, temperatures range from around 16°C (61°F) in August to 6°C (43°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Carnac
Generally, Carnac has a moderate amount of precipitation, averaging 844 mm (33 in) of rainfall annually. Carnac can be quite wet during December, receiving approximately 103 mm (4.1 in) of precipitation over 19 rainy days.
In contrast, during the driest month (July), you will experience much drier conditions, with 43 mm (1.7 in) of precipitation spread across 11 rainy days. For more details, please visit our Carnac Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Carnac
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: June, July, August and September
- Warmest weather: July and August
- Fewest rainy days: June, July, August and September
- Seasonal pattern: Pleasant summers and cold winters
Frequently asked questions about the climate in Carnac
What is the best time to visit Carnac?
June, July, August and September typically offer the most optimal weather in Carnac. In contrast, December tends to have less optimal conditions. Carnac has pleasant summers and cold winters.
What temperatures can I expect in Carnac?
Daytime highs range from 11°C (52°F) in January to 22°C (72°F) in August. Nighttime lows range from 6°C (43°F) to 16°C (61°F).
How much rain does Carnac get?
Annual rainfall is around 844 mm (33 in). December is the wettest month with 103 mm (4.1 in), while July is the driest with 43 mm (1.7 in).
Carnac 3-Day Forecast
Carnac on the map
Carnac is highlighted - select any city to see its climate.
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