For Rennes : No gale warning.
We are 85% sure of the situation, because the atmosphere might not be as stable as forecast.
A few fair-weather cumulus clouds in the morning, good clear periods with lots of cloud in the afternoon. The risk of seeing rain will remain low.
In the evening, very cloudy skies becoming totally overcast. Chance of light rain. WSW wind force 4 continuing all day. Gusts reaching 24 knots from the middle of the day. Poor visibility becoming excellent in the middle of the day.