Carnac weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: July – August
What is the weather like in Carnac in December?
In December, Carnac is cool: daytime highs average 10 °C, and nights cool down to about 7 °C. The sea averages 11.8 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Rain is frequent, with about 14 rainy days and 109 mm in total. It is often windy, with gusts of around 32 km/h. All in all, December is not an ideal month for a holiday in Carnac.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 6 | 6 | 7 |
| Day | 13° | 10° | 9° |
| Night | 10° | 7° | 6° |
| Sea | 14° | 12° | 10° |
| Sun | 3 h | 2 h | 2 h |
| Rain days | 14 | 14 | 13 |
More details for December
- Daylight
- 8 h 28 min08:53 – 17:21
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 32 km/haverage daily peakAll months
- Cloud cover
- 71 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/Paris
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 20 %29 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- A jumper for the evenings
- Rain jacket or umbrella
- Windproof jacket
Carnac in December: quick answers
Is Carnac hot in December?
No. In December, Carnac is cool: daytime highs average 10 °C and nights drop to about 7 °C.
Can you swim in Carnac in December?
Only if you don't mind cold water: in December the sea averages just 11.8 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Carnac in December?
Rain is frequent, with about 14 rainy days and 109 mm in total.
Carnac month by month
The whole year in CarnacAll destinations: FranceWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences