Carnac Temperature by Month

The average annual maximum temperature in Carnac, Brittany, France is 16°C (61°F), with daytime highs ranging from 11°C (52°F) in January to 22°C (72°F) in August. This page covers monthly averages, day-night differences, and how Carnac compares to cities worldwide.

The moderate changes in the climate in Carnac ensure gradual weather shifts through each season. At night, temperatures drop to between 16°C (61°F) and 6°C (43°F) depending on the time of year.

The chart below illustrates the average maximum day and minimum night temperatures in Carnac by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

Carnac's average annual maximum temperature is 16°C (61°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

On the cooler end, Oslo, Norway averages just 10°C (50°F) annually, with pleasant summers but long, cold winters.

Beijing, China averages 20°C (68°F) annually, but with big seasonal swings, very cold winters and hot summers.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Carnac's weather, including monthly rainfall, sunshine hours, and humidity, visit our Carnac climate page.