Click on a day for an hourly weather forecast
The temperatures in Carnac in October are usually low and can range between 12°C and 17°C.
You can expect about 3 to 8 days of rain in Carnac during the month of October. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Carnac in October 2026.
If you’re planning to visit Carnac in the near future, we highly recommend that you review the 14 day weather forecast for Carnac before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | 9° / 6° | 8 | 22 | 1 | 126 mm | Bad | Carnac in January |
| February | 10° / 5° | 8 | 19 | 1 | 114 mm | Bad | Carnac in February |
| March | 12° / 6° | 6 | 25 | 0 | 75 mm | Ok | Carnac in March |
| April | 14° / 8° | 5 | 25 | 0 | 74 mm | Good | Carnac in April |
| May | 16° / 10° | 4 | 27 | 0 | 75 mm | Good | Carnac in May |
| June | 19° / 13° | 5 | 25 | 0 | 96 mm | Good | Carnac in June |
| July | 21° / 15° | 4 | 27 | 0 | 65 mm | Good | Carnac in July |
| August | 21° / 15° | 5 | 26 | 0 | 74 mm | Good | Carnac in August |
| September | 20° / 13° | 3 | 27 | 0 | 52 mm | Good | Carnac in September |
| October | 17° / 12° | 6 | 25 | 0 | 131 mm | Good | Carnac in October |
| November | 13° / 9° | 8 | 22 | 0 | 139 mm | Bad | Carnac in November |
| December | 11° / 7° | 9 | 21 | 0 | 144 mm | Bad | Carnac in December |